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21,400 | Influence of total flavonoids derived from Choerospondias axillaris folium on aconitine-induced antiarrhythmic action and hemodynamics in Wistar rats. | It is well known that various traditional Chinese medicines produce antiarrhythmic actions. The aims of this study were to examine whether total flavones derived from Choerospondias axillaris folium (TFCF) also produced antiarrhythmic effects using a rat model of aconitine-induced arrhythmia and to compare these observ... |
21,401 | Potential roles of the wearable cardioverter-defibrillator in acute phase care of patients at high risk of sudden cardiac death: A single-center Japanese experience. | The wearable cardioverter-defibrillator (WCD) has been expected to play a role as an effective bridge therapy to implantable cardioverter-defibrillator (ICD) implantation in patients at high risk of ventricular tachyarrhythmias (VA). Although WCD has been available since April 2014 in Japan, its usefulness remains uncl... |
21,402 | J Waves Are Associated With the Increased Occurrence of Life-Threatening Ventricular Tachyarrhythmia in Patients With Nonischemic Cardiomyopathy. | Recent studies showed that J waves were associated with higher incidence of ventricular tachyarrhythmia (VT/VF) in patients with idiopathic ventricular fibrillation (VF) and myocardial infarction. We sought to assess the association between J waves and VT/VF in patients with nonischemic cardiomyopathy (NICM).</Abstract... |
21,403 | Current-Voltage Relationship for Late Na(+) Current in Adult Rat Ventricular Myocytes. | It is now well established that the slowly inactivating component of the Na(+) current (INa-L) in the mammalian heart is a significant regulator of the action potential waveform. This insight has led to detailed studies of the role of INa-L in a number of important and challenging pathophysiological settings. These inc... |
21,404 | Relationship between exercise induced elevation of left ventricular filling pressure and exercise intolerance in patients with atrial fibrillation. | Elevated left ventricular filling pressure (LVFP) is an important cause of exercise intolerance in patients with atrial fibrillation (AF). Exercise stress echocardiography could assess LVFP during exercise. The objective of this study was to investigate the relationship between exercise induced elevation of LVFP and ex... |
21,405 | Pre-hospital portable monitoring of cerebral regional oxygen saturation (rSO2) in seven patients with out-of-hospital cardiac arrest. | In recent years, measurement of cerebral regional oxygen saturation (rSO2) has attracted attention during resuscitation. However, serial changes of cerebral rSO2 in pre-hospital settings are unclear. The objective of this study was to clarify serial changes in cerebral rSO2 of patients with out-of-hospital cardiac arre... |
21,406 | Association of worsening arterial stiffness with incident heart failure in asymptomatic patients with cardiovascular risk factors. | We investigated the independent and incremental role of worsening arterial stiffness in new-onset heart failure (HF) in patients with preclinical HF. We retrospectively studied 456 consecutive asymptomatic patients with HF risk factors (hypertension, obesity, type 2 diabetes mellitus, atrial fibrillation and ischemic h... |
21,407 | [Updated ESC guideline: innovations for the treatment of ventricular arrhythmias and recommendations for prevention of sudden cardiac death]. | The 2015 European Society of Cardiology Guidelines for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death is an update of the former 2006 European/American guidelines. This new consensus document gives a detailed overview on prevention and therapy of ventricular arrh... |
21,408 | [ATRIAL FIBRILLATION AND HEMODINAMICALY UNSTABLE WIDE QRS COMPLEX TACHYCARDIA – A case report]. | Tachycardia is an arrhythmia characterized by heart rate > 100 / minute. According to the width of the QRS complex it can be divided into narrow QRS (< 120 ms) and wide QRS tachycardia (> 120 ms). Narrow QRS tachycardia is always supraventricular which means that its source is proximal to the bundle of His, wh... |
21,409 | Association of cardiac cachexia and atrial fibrillation in heart failure patients. | Cachexia is a common complication in patients with advanced heart failure (HF) associated with inflammatory response activation. Atrial fibrillation (AF) is the most frequent arrhythmia (26%), probably both exacerbate the cardiac cachexia (CC).</AbstractText>Evaluate the association of cardiac cachexia and atrial fibri... |
21,410 | Intracoronary adenosine-induced ventricular arrhythmias during fractional flow reserve (FFR) measurement: case series and literature review. | Fractional flow reserve (FFR) is a standardized and well-established method frequently used in clinical practice to evaluate the hemodynamic significance of epicardial coronary stenosis identified by coronary angiography. It is based on the change in the pressure gradient across the stenosis after the achievement of ma... |
21,411 | Tachycardia detection in modern implantable cardioverter-defibrillators. | Implantable cardioverter-defibrillators (ICD) have to reliably sense, detect, and treat malignant ventricular tachyarrhythmias. Inappropriate treatment of non life-threatening tachyarrhythmias should be avoided. This article outlines the functionality of ICDs developed and manufactured by BIOTRONIK. Proper sensing is a... |
21,412 | Usefulness of Testing for Coronary Artery Spasm and Programmed Ventricular Stimulation in Survivors of Out-of-Hospital Cardiac Arrest. | Optimal therapy for patients resuscitated from out-of-hospital cardiac arrest (OHCA) who are not found to have structural heart disease remains to be established, especially regarding the use of implantable cardioverter-defibrillators. Coronary artery spasm (CAS) and lethal ventricular arrhythmias are important causes ... |
21,413 | Influence of Genotype on Structural Atrial Abnormalities and Atrial Fibrillation or Flutter in Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy. | Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is associated with desmosomal mutations. Although desmosomal disruption affects both ventricles and atria, little is known about atrial involvement in ARVD/C.</AbstractText>To describe the extent and clinical significance of structural atrial involvemen... |
21,414 | Single-Coil Defibrillator Leads Yield Satisfactory Defibrillation Safety Margin in Hypertrophic Cardiomyopathy. | Single-coil defibrillator leads have gained favor because of their potential ease of extraction. However, a high defibrillation threshold remains a concern in patients with hypertrophic cardiomyopathy (HCM), and in many cases, dual-coil leads have been used for this patient group. There is little data on using single-c... |
21,415 | Amiodarone or nifekalant upon hospital arrival for refractory ventricular fibrillation after out-of-hospital cardiac arrest. | We evaluated the association between nifekalant or amiodarone on hospital admission and in-hospital mortality for cardiac arrest patients with persistent ventricular fibrillation on hospital arrival.</AbstractText>This was a retrospective cohort study using the Japanese Diagnosis Procedure Combination inpatient databas... |
21,416 | Non-invasively estimated left atrial stiffness is associated with short-term recurrence of atrial fibrillation after electrical cardioversion. | As atrial stiffness (Kla</sub>) is an important determinant of cardiac pump function, better mechanical characterization of left atrial (LA) cavity would be clinically relevant. Pulmonary venous ablation is an option for atrial fibrillation (AF) treatment that offers a powerful context for improving our understanding o... |
21,417 | Prognostic Usefulness of the 6-Minute Walk Test in Patients With Severe Aortic Stenosis. | The 6-minute walk test distance (6MWD) has been shown to predict prognosis in selected cohorts of patients with heart failure and outcomes after surgical or transcatheter aortic valve implantation (AVI) in patients with symptomatic severe aortic stenosis (AS). Our objective was to evaluate the association between the 6... |
21,418 | Ventricular Arrhythmia Burden in Patients With Heart Failure and Cardiac Resynchronization Devices: The Importance of Renal Function. | Chronic kidney disease (CKD) is a risk factor for arrhythmias in patients with heart failure (HF). However, the effects of CKD on ventricular arrhythmia (VA) burden in patients with cardiac resynchronization therapy and defibrillator (CRT-D) devices in a primary prevention setting are unknown.</AbstractText>To determin... |
21,419 | Installation of multiple automated external defibrillators to prevent sudden death in school-aged children. | Recently, a student died of idiopathic ventricular fibrillation in a school where an automated external defibrillator (AED) had been installed. The tragedy could not be prevented because the only AED in the school was installed in the teachers' office, far from the school ground where the accident took place. This prom... |
21,420 | Prediction of Ventricular Tachycardia One Hour before Occurrence Using Artificial Neural Networks. | Ventricular tachycardia (VT) is a potentially fatal tachyarrhythmia, which causes a rapid heartbeat as a result of improper electrical activity of the heart. This is a potentially life-threatening arrhythmia because it can cause low blood pressure and may lead to ventricular fibrillation, asystole, and sudden cardiac d... |
21,421 | Epidemiology, Management Strategies, and Outcomes of Patients With Chronic Total Coronary Occlusion. | Factors influencing the management of patients with chronic total occlusion (CTO) are poorly described. We sought to analyze the clinical and angiographic variables influencing the decision-making process of patients with CTO. Consecutive patients with at least 1 coronary artery CTO were included and categorized as man... |
21,422 | A Novel SCN5A Mutation Associated with Drug Induced Brugada Type ECG. | Class IC antiarrhythmic agents may induce acquired forms of Brugada Syndrome. We have identified a novel mutation in SCN5A, the gene that encodes the α-subunit of the human cardiac sodium channel (hNav1.5), in a patient who exhibited Brugada- type ECG changes during pharmacotherapy of atrial arrhythmias.</Abstrac... |
21,423 | Rhythm control in atrial fibrillation. | Many patients with atrial fibrillation have substantial symptoms despite ventricular rate control and require restoration of sinus rhythm to improve their quality of life. Acute restoration (ie, cardioversion) and maintenance of sinus rhythm in patients with atrial fibrillation are referred to as rhythm control. The de... |
21,424 | Association of Central Sleep Apnea with Impaired Heart Structure and Cardiovascular Hemodynamics in Patients with Chronic Heart Failure. | BACKGROUND Advanced heart failure (HF) is commonly accompanied by central sleep apnea (CSA) with Cheyne-Stokes respiration (CSR). The aim of this study was to evaluate the relationship between CSA/CSR and other clinical features of HF, with particular emphasis on cardiovascular hemodynamics. MATERIAL AND METHODS In 161... |
21,425 | Persistent atrial standstill following the Cox-maze III procedure: reversal with sustained atrial pacing. | Atrial standstill is a rare disorder of cardiac rhythm that is characterized by total absence of electrical activity in one or both atria. We report herein the case of a patient with atrial fibrillation and symptomatic 4.0 s pauses who received a ventricular demand pacemaker. The patient later underwent mitral valve re... |
21,426 | A case report of systemic embolic events associated with atrial fibrillation. | An 82-year-old woman who had atrial fibrillation was found unconscious and was brought to the emergency department by ambulance. Her Glasgow Coma Scale score was 3, and an electrocardiogram showed ST segment elevation in V3 and V4. Cardiac ultrasonography showed left ventricular asynergy in the anterior wall, septum, a... |
21,427 | Preoperative Electrocardiogram Score for Predicting New-Onset Postoperative Atrial Fibrillation in Patients Undergoing Cardiac Surgery. | To investigate if electrocardiogram (ECG) markers from routine preoperative ECGs can be used in combination with clinical data to predict new-onset postoperative atrial fibrillation (POAF) following cardiac surgery.</AbstractText>Retrospective observational case-control study.</AbstractText>Single-center university hos... |
21,428 | Management and Outcome of Periprocedural Cardiac Perforation and Tamponade with Radiofrequency Catheter Ablation of Cardiac Arrhythmias: A Single Medium-Volume Center Experience. | Cardiac tamponade (CT) is a life-threatening complication of radiofrequency ablation (RFA). The course and outcome of CT in low-to-medium volume electrophysiology centers are underreported.</AbstractText>We analyzed the incidence, management and outcomes of CT in 1500 consecutive RFAs performed in our center during 201... |
21,429 | Magnetic resonance imaging guided transatrial electrophysiological studies in swine using active catheter tracking - experience with 14 cases. | To evaluate the feasibility of performing comprehensive Cardiac Magnetic resonance (CMR) guided electrophysiological (EP) interventions in a porcine model encompassing left atrial access.</AbstractText>After introduction of two femoral sheaths 14 swine (41 ± 3.6 kg) were transferred to a 1.5
... |
21,430 | A warning sign. | A 64year old man presented with atypical chest pain of 6h duration. Physical examination showed tachycardia and an irregularly irregular pulse. Initial EKG showed atrial fibrillation with rapid ventricular rate. Intravenous Diltiazem was administered following which there was resolution of atrial fibrillation as well a... |
21,431 | Prognostic Implications of Left Ventricular Scar Determined by Late Gadolinium Enhanced Cardiac Magnetic Resonance in Patients With Atrial Fibrillation. | Left ventricular (LV) scar identified by late gadolinium enhanced (LGE) cardiac magnetic resonance (CMR) is associated with adverse outcomes in coronary artery disease and cardiomyopathies. We sought to determine the prognostic significance of LV-LGE in atrial fibrillation (AF). We studied 778 consecutive patients refe... |
21,432 | Prognostic value of new left atrial volume index severity partition cutoffs after cardiac rehabilitation program in patients undergoing cardiac surgery. | Previous studies showed that left atrial enlargement is an independent marker of adverse outcomes in both primary and secondary cardiovascular prevention. However, no data are available on long-term outcomes in patients undergoing valve surgery and/or coronary artery by-pass graft (CABG) surgery. Aim of the study was t... |
21,433 | Low-Dose Quinidine Effectively Reduced Shocks in Brugada Syndrome Patients with an Implantable Cardioverter Defibrillator: A Chinese Case Series Report. | Only implantable cardioverter defibrillators (ICD) have been proven to prevent sudden cardiac death (SCD) in patients with Brugada syndrome (BrS). However, ICD discharge, whether appropriate or inappropriate, leads to impaired quality of life and even increases rehospitalization. Quinidine might prevent the recurrence ... |
21,434 | Real-World Assessment of Acute Left Ventricular Lead Implant Success and Complication Rates: Results from the Attain Success Clinical Trial. | Left ventricular lead (LVL) implant success rates have historically ranged between 70.5% and 95.5%. To date, there are few large studies that evaluate LVL implant success utilizing a single family of delivery catheters and leads. The Attain Success study was a prospective nonrandomized multicenter global study with the... |
21,435 | Long-Term Outcome of Non-Sustained Ventricular Tachycardia in Structurally Normal Hearts. | The impact of non-sustained ventricular tachycardia (NSVT) on the risk of thromboembolic event and clinical outcomes in patients without structural heart disease remains undetermined. This study aimed to evaluate the association between NSVT and clinical outcomes.</AbstractText>The study population of 5903 patients was... |
21,436 | The Emergency Medical Care of Patients With Acute Myocardial Infarction. | Optimizing the emergency medical care chain might shorten the time to treatment of patients with ST-elevation myocardial infarction (STEMI). The initial care by a physician, and, in particular, correct ECG interpretation, are critically important factors.</AbstractText>From 1999 onward, data on the care of patients wit... |
21,437 | Sudden cardiac death and late arrhythmias after the Fontan operation. | We sought to examine the incidence and predictors of arrhythmias and sudden cardiac death (SCD) after Fontan operation.</AbstractText>Arrhythmias and SCD have been reported following operations for congenital heart disease, but the incidence and risk factors have not been well defined in patients after a Fontan operati... |
21,438 | Integration of Flow-Gradient Patterns Into Clinical Decision Making for Patients With Suspected Severe Aortic Stenosis and Preserved LVEF: A Systematic Review of Evidence and Meta-Analysis. | This study was designed to evaluate the evidence base for the 2014 American Heart Association/American College of Cardiology (AHA/ACC) guidelines for severe aortic stenosis (SAS) and preserved left ventricular ejection fraction by comparing the natural history of the disease in subgroups of low-gradient (LG) aortic ste... |
21,439 | Hyperglycemia and subsequent torsades de pointes with marked QT prolongation during refeeding. | A fatal cardiac complication can occasionally present in malnourished patients during refeeding; this is known as refeeding syndrome. However, to our knowledge, hyperglycemia preceding torsades de pointes with QT prolongation during refeeding has not been reported. In the present study, we present a case in which hyper... |
21,440 | Physiological cardiac pacing: Current status. | Adverse hemodynamics of right ventricular (RV) pacing is a well-known fact. It was believed to be the result of atrio-ventricular (AV) dyssynchrony and sequential pacing of the atrium and ventricle may solve these problems. However, despite maintenance of AV synchrony, the dual chamber pacemakers in different trials ha... |
21,441 | Prolonged asystole in a patient with an isolated left ventricular assist device. | Left ventricular assist devices (LVADs) are well established in the management of end-stage heart failure as either destination therapy, a bridge prior to cardiac transplantation or during myocardial recovery. Despite LVADs requiring adequate left ventricular preload to effectively augment systemic circulation, there h... |
21,442 | The natural history of fetal long QT syndrome. | Fetal magnetocardiography (fMCG), the magnetic analog of ECG, has provided invaluable insight into the mechanisms of fetal arrhythmias. In the past 15years, we have evaluated over 300 fetuses with arrhythmia by fMCG. We review the unique characteristics and natural history of the long QT syndrome (LQTS) rhythms.</Abstr... |
21,443 | Measurement of T wave variability in body surface ECG. | Lability in the ventricular repolarization process has been associated with an increased risk of experiencing ventricular tachycardia or fibrillation. A number of risk predictors have been devised that quantify beat-to-beat variability in the T wave morphology of body surface ECG. Initial studies have suggested that me... |
21,444 | How to estimate heart rate from pulse rate reported by oscillometric method in atrial fibrillation: The value of pulse rate variation. | To evaluate whether the mean pulse rate (PR) from three oscillometric blood pressure (BP) measurements provides an accurate estimation of electrocardiogram ventricular rate (HR) in patients with permanent atrial fibrillation (AF).</AbstractText>BP and PR were measured with an oscillometric BP device for three times wit... |
21,445 | Ventricular Fibrillation Waveform Changes during Controlled Coronary Perfusion Using Extracorporeal Circulation in a Swine Model. | Several characteristics of the ventricular fibrillation (VF) waveform have been found predictive of successful defibrillation and hypothesized to reflect the myocardial energy state. In an open-chest swine model of VF, we modeled "average CPR" using extracorporeal circulation (ECC) and assessed the time course of coron... |
21,446 | Novel Mechanistic Insights Into Atrial Functional Mitral Regurgitation　- 3-Dimensional Echocardiographic Study. | Left atrial remodeling caused by persistent atrial fibrillation (AF) causes atrial functional mitral regurgitation (MR), even though left ventricular (LV) remodeling and organic changes of the mitral leaflets are lacking. The detailed mechanism of atrial functional MR has not been fully investigated.</AbstractText><Abs... |
21,447 | Effects of digitalis on mortality in a large cohort of implantable cardioverter defibrillator recipients: results of a long-term follow-up study in 1020 patients. | The effects of digitalis on mortality in patients with structural heart disease are controversially discussed. We aimed to assess the effects of digitalis administration in implantable cardioverter defibrillator (ICD) recipients.</AbstractText>This retrospective analysis comprises 1020 consecutive patients who received... |
21,448 | In-hospital resuscitation: recognising and responding to adults in cardiac arrest. | Survival rates following in-hospital cardiac arrest remain low. The majority of patients who survive a cardiac arrest will be in a monitored environment, have a witnessed cardiac arrest and present with a shockable rhythm, usually ventricular fibrillation. Nurses have a responsibility to preserve safety, which requires... |
21,449 | Physiological variation in left atrial transverse orientation does not influence orthogonal P-wave morphology. | It has previously been demonstrated that orthogonal P-wave morphology in healthy athletes does not depend on atrial size, but the possible impact of left atrial orientation on P-wave morphology remains unknown. In this study, we investigated if left atrial transverse orientation affects P-wave morphology in different p... |
21,450 | Renal Denervation Suppresses the Inducibility of Atrial Fibrillation in a Rabbit Model for Atrial Fibrosis. | Renal denervation (RD) was reported to reduce the susceptibility of atrial fibrillation (AF), but the underlying mechanism has not been well understood. This study was performed to investigate the effect of RD on the inducibility of AF in a rabbit model for atrial fibrosis and to explore the potential mechanisms. Thirt... |
21,451 | Refractory ventricular fibrillation treated with esmolol. | This study aimed to evaluate the effects of esmolol treatment for patients with refractory ventricular fibrillation (RVF) in out-of-hospital cardiac arrest (OHCA).</AbstractText>This single-centre retrospective pre-post study evaluated patients who were treated between January 2012 and December 2015. Some patients had ... |
21,452 | HeartWare ventricular assist device as a bridge to heart transplantation in a patient with congenitally corrected transposition of the great arteries and dextrocardia. | Congenitally corrected transposition of the great arteries (ccTGA) is a rare condition with prevalence of <0.5%. Dextrocardia is reported among 20% of them. Among patients with ccTGA, heart failure is a common presentation, especially in the fourth or fifth decade of life and survival is dismal without heart transpl... |
21,453 | Elucidating the Association Between Depressive Symptoms, Coronary Heart Disease, and Stroke in Black and White Adults: The REasons for Geographic And Racial Differences in Stroke (REGARDS) Study. | Depression is a relapsing and remitting disease. Prior studies on the association between depressive symptoms and incident cardiovascular disease (CVD) have been limited by single measurements, and few if any have examined both incident coronary heart disease and stroke in a large biracial national cohort. We aimed to ... |
21,454 | Dynamics and Molecular Mechanisms of Ventricular Fibrillation in Structurally Normal Hearts. | Ventricular fibrillation (VF) is the most severe cardiac rhythm disturbance and one of the most important immediate causes of sudden cardiac death. In the structurally normal heart, a small number of stable reentrant sources, perhaps 1 or 2, underlie the mechanism of VF, and the stabilization of the sources, their freq... |
21,455 | Exercise-induced Ventricular Tachycardia/Ventricular Fibrillation in the Normal Heart: Risk Stratification and Management. | Exercise-induced ventricular tachycardia (VT) rarely occurs in the absence of organic heart disease. Idiopathic monomorphic VT has an excellent prognosis. The main aspect of the risk stratification process is recognizing subtle forms of organic heart disease, particularly arrhythmogenic right ventricular cardiomyopathy... |
21,456 | Polymorphic Ventricular Tachycardia/Ventricular Fibrillation and Sudden Cardiac Death in the Normal Heart. | Primary electrical diseases manifest with polymorphic ventricular tachycardia (PMVT) and ventricular fibrillation (VF) and along with idiopathic VF contribute to about 10% of sudden cardiac deaths (SCDs) overall. These disorders include long QT syndrome, Brugada syndrome, catecholaminergic polymorphic ventricular tachy... |
21,457 | Spectrum of Fascicular Arrhythmias. | Fascicular arrhythmias encompass a wide spectrum of ventricular arrhythmias that depend on the specialized conduction system of the right and left ventricles. These arrhythmias include premature ventricular complexes, monomorphic ventricular tachycardia, polymorphic ventricular tachycardia, and ventricular fibrillation... |
21,458 | Spectrum of Ventricular Arrhythmias Arising from Papillary Muscle in the Structurally Normal Heart. | Papillary muscle is an endocavitary structure that can give rise to ventricular arrhythmias in a structurally normal heart. Its manifestation is generally benign. The papillary muscle's complex anatomy and the presence of intermixed Purkinje fibers can create a substrate for idiopathic ventricular fibrillation. Althoug... |
21,459 | Premature Ventricular Complexes in Apparently Normal Hearts. | Premature ventricular complexes (PVCs) are consistently associated with worse prognosis and higher morbidity and mortality. This article reviews PVCs and their presentation in patients with an apparently normal heart. Patients with PVCs may be completely asymptomatic, whereas others may note severely disabling symptoms... |
21,460 | Value of Implantable Loop Recorders in Monitoring Efficacy of Radiofrequency Catheter Ablation in Atrial Fibrillation. | BACKGROUND The aim of this study was to evaluate the value of the implantable loop recorder (ILR) in diagnosing atrial fibrillation (AF) and assessing the postoperative efficacy of radiofrequency catheter ablation (RFCA). MATERIAL AND METHODS A total of 32 patients who successfully underwent RFCA were selected. These p... |
21,461 | Conventional versus Transapical Aortic Valve Replacement: Is It Time for Shift in Indications? | <b>Background</b> The incidence of degenerative aortic valve diseases has increased along with the life expectancy of our population. Although conventional aortic valve replacement (AVR) is the gold standard for symptomatic aortic stenosis, transcatheter procedures have proven to be a valid therapeutic option in... |
21,462 | Nonlinear physics of electrical wave propagation in the heart: a review. | The beating of the heart is a synchronized contraction of muscle cells (myocytes) that is triggered by a periodic sequence of electrical waves (action potentials) originating in the sino-atrial node and propagating over the atria and the ventricles. Cardiac arrhythmias like atrial and ventricular fibrillation (AF,VF) o... |
21,463 | Frontal QRS-T Angle and the Risk of Atrial Fibrillation in the Elderly. | Frontal QRS-T angle reflects changes in regional action potential duration and the direction of repolarization. Although it has been suggested that abnormal ventricular repolarization predisposes to atrial arrhythmias, it is unknown whether abnormal frontal QRS-T angle is associated with an increased risk of atrial fib... |
21,464 | Effect of ethanol and acetaldehyde at clinically relevant concentrations on atrial inward rectifier potassium current IK1: separate and combined effect. | Atrial fibrillation is the most common arrhythmia at alcohol consumption. Its pathogenesis is complex, at least partly related to changes of cardiac inward rectifier potassium currents including IK1. Both ethanol and acetaldehyde have been demonstrated to considerably modify IK1 in rat ventricular myocytes. However, an... |
21,465 | The investigation of the cellular electrophysiological and antiarrhythmic effects of a novel selective sodium-calcium exchanger inhibitor, GYKB-6635, in canine and guinea-pig hearts. | The sodium-calcium exchanger (NCX) is considered as the major transmembrane transport mechanism that controls Ca<sup>2+</sup> homeostasis. Its contribution to the cardiac repolarization has not yet been directly studied due to lack of specific inhibitors, so that an urgent need for more selective compounds. In this stu... |
21,466 | Multicenter Experience With Catheter Ablation for Ventricular Tachycardia in Lamin A/C Cardiomyopathy. | Lamin A/C (LMNA) cardiomyopathy is a genetic disease with a proclivity for ventricular arrhythmias. We describe the multicenter experience with percutaneous catheter ablation of sustained monomorphic ventricular tachycardia (VT) in LMNA cardiomyopathy.</AbstractText>Twenty-five consecutive LMNA mutation patients from 4... |
21,467 | A Novel Annotation Technique During Mapping to Facilitate the Termination of Atrial Tachycardia Following Ablation for Atrial Fibrillation. | The treatment of atrial tachycardia (AT) occurring after ablation for atrial fibrillation (AF) is challenging. The most common ablation strategy relies on entrainment, and electroanatomic activation mapping (EAM) using a conventional window of interest (WOI), centered on the easily detectable atrial signal on the coron... |
21,468 | Effects of Erythropoietin Administration on Adrenal Glands of Landrace/Large White Pigs after Ventricular Fibrillation. | Aim. To evaluate the effects of erythropoietin administration on the adrenal glands in a swine model of ventricular fibrillation and resuscitation. Methods. Ventricular fibrillation was induced via pacing wire forwarded into the right ventricle in 20 female Landrace/Large White pigs, allocated into 2 groups: experiment... |
21,469 | Prosthetic Aortic Valve Endocarditis with Left Main Coronary Artery Embolism: A Case Report and Review of the Literature. | Coronary embolization is potentially a fatal sequela of endocarditis. Although the primary cause of acute coronary syndrome is atherosclerotic disease, it is imperative to consider septic embolism as an etiological factor.</AbstractText>Herein, we report a case of ventricular fibrillation and ST-segment depression myoc... |
21,470 | Predictive Value of Echocardiographic Abnormalities and the Impact of Diastolic Dysfunction on In-hospital Major Cardiovascular Complications after Living Donor Kidney Transplantation. | Patients with end-stage renal disease (ESRD) show characteristic abnormalities in cardiac structure and function. We evaluated the influence of these abnormalities on adverse cardiopulmonary outcomes after living donor kidney transplantation in patients with valid preoperative transthoracic echocardiographic evaluation... |
21,471 | Acute restraint stress provokes sudden cardiac death in normotensive rats and enhances susceptibility to arrhythmogenic effects of adrenaline in spontaneously hypertensive rats. | A high incidence of cardiovascular events and sudden cardiac death (SCD) has been reported following unexpected acute psychosocial stress. The possible pathways by which acute restraint stress (ARS), a kind of acute psychosocial stress, leads to SCD were determined.</AbstractText>Using 16-week-old male normotensive Wis... |
21,472 | Prevalence of Left Ventricular Hypertrophy and Left Ventricular Dysfunction in Older Renal Transplant Recipients. | Left ventricular hypertrophy (LVH) is a risk factor for premature cardiovascular morbidity and mortality in chronic kidney disease. The aim of the study was to determine echocardiographic evaluation morphology and function of the left ventricle in older renal transplantation patients.</AbstractText>We retrospectively a... |
21,473 | Remote ischemic preconditioning improves post resuscitation cerebral function via overexpressing neuroglobin after cardiac arrest in rats. | In this study, we investigated the effects of remote ischemic preconditioning on post resuscitation cerebral function in a rat model of cardiac arrest and resuscitation. The animals were randomized into six groups: 1) sham operation, 2) lateral ventricle injection and sham operation, 3) cardiac arrest induced by ventri... |
21,474 | Predictors of Occult Atrial Fibrillation in One Hundred Seventy-One Patients with Cryptogenic Transient Ischemic Attack and Minor Stroke. | Recent randomized studies have shown the potential of prolonged cardiac rhythm monitoring to detect silent paroxysmal atrial fibrillation (PAF) in patients with cryptogenic stroke. Our aim was to identify clinical and magnetic resonance imaging (MRI) factors that predict the detection of PAF during long-duration rhythm... |
21,475 | Medical therapy to prevent recurrence of ventricular arrhythmia in normal and structural heart disease patients. | Recurrent ventricular arrhythmias (VA) are a source of significant morbidity in patients without structural heart disease (SHD) and also mortality in patients with SHD. The treatment goals for these two patient populations differ greatly. Areas covered: The secondary prevention of recurrent VA in patients without and w... |
21,476 | Extracorporeal Membrane Oxygenation (ECMO) for Hypothermic Cardiac Deterioration: A Case Series. | Accidental hypothermia can lead to untoward cardiac manifestations and arrest. This report presents a case series of severe accidental hypothermia with cardiac complications in three emergency patients who were treated with extracorporeal membrane oxygenation (ECMO) and survived after re-warming. The aim of this discus... |
21,477 | [Alcohol consumption in women and the elderly : When does it induce heart failure?]. | The association between alcohol consumption and the etiology and prognosis of cardiovascular diseases has been the focus of attention and also the subject of controversial discussions for many years. This is particularly true for heart failure, which can be induced by coronary artery disease (CAD), arterial hypertensio... |
21,478 | Simultaneous occurrence of metabolic, hematologic, neurologic and cardiac complications after Roux-en-Y gastric bypass for morbid obesity. | Roux-en-Y gastric bypass (RYGB) is a commonly performed procedure in the surgical treatment of morbid obesity. Since a major anatomical alteration is made, this procedure may lead to significant postoperative complications, including nutritional deficiencies related to malabsorption. As a consequence of micronutrient d... |
21,479 | Association of serum uric acid level with mortality and morbidity of patients with acute ST-elevation myocardial infarction. | Investigating the clinical impact of serum uric acid (UA) and its lowering agents on the complications and mortality of acute ST-elevation myocardial infarction (STEMI) can open a new era in STEMI treatment. The aim of this study was to evaluate the effect of on admission serum UA level on the mortality and morbidity o... |
21,480 | In-Hospital Cardiac Arrest: An Update on Pulseless Electrical Activity and Asystole. | Nonshockable rhythms, including pulseless electrical activity (PEA) and asystole, precede more than 70% of in-hospital cardiac arrests (I-HCA). Compared with shockable rhythms (ventricular fibrillation and ventricular tachycardia), nonshockable rhythms have higher mortality and morbidity. Therefore, investigating the u... |
21,481 | Ventricular Tachycardias: Characteristics and Management. | Ventricular tachycardias include ventricular tachycardia, ventricular fibrillation, and torsades de pointes; although these rhythms may be benign and asymptomatic, others may be life threatening and lead to increased morbidity and mortality. To optimize patient outcomes, ventricular tachycardias need to be rapidly diag... |
21,482 | A case of anomalous origin of the left coronary artery from the pulmonary artery presenting with sudden cardiac arrest due to coronary artery steal generated by excessive exercise. | This case report describes a 43-year-old man who temporarily survived cardiac arrest that was prospectively related to ventricular fibrillation due to the anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA). Prior to admission to our hospital, he was asymptomatic for ALCAPA syndrome. Emergen... |
21,483 | Association Between Off-site Central Monitoring Using Standardized Cardiac Telemetry and Clinical Outcomes Among Non-Critically Ill Patients. | Telemetry alarms involving traditional on-site monitoring rarely alter management and often miss serious events, sometimes resulting in death. Poor patient selection contributes to a high alarm volume with low clinical yield.</AbstractText>To evaluate outcomes associated with an off-site central monitoring unit (CMU) a... |
21,484 | The utility of T-wave alternans during the morning in the summer for the risk stratification of patients with Brugada syndrome. | The prognostic value of the seasonal variations of T-wave alternans (TWA) and heart rate variability (HRV), and the seasonal distribution of ventricular fibrillation (VF) in Brugada syndrome (Br-S) is unknown. We assessed the utility of seasonal variations in TWA and HRV for risk stratification in Br-S using a 24-h mul... |
21,485 | Three-Dimensional Echocardiographic Assessment of Left Heart Chamber Size and Function with Fully Automated Quantification Software in Patients with Atrial Fibrillation. | Echocardiographic determination of left heart chamber volumetric parameters by using manual tracings during multiple beats is tedious in atrial fibrillation (AF). The aim of this study was to determine the usefulness of fully automated left chamber quantification software with single-beat three-dimensional transthoraci... |
21,486 | Ventricular fibrillation with intracoronary adenosine during fractional flow reserve assessment. | Fractional flow reserve (FFR) measurement provides useful hemodynamic assessment of intermediate coronary stenoses affecting long term outcomes. While the gold standard remains intravenous adenosine, intracoronary (IC) bolus administration of adenosine is routinely used in clinical practice because of its ease of use a... |
21,487 | CARDIAC SURGERY FOR VALVULAR HEART DISEASE AT A REFERRAL HOSPITAL IN ETHIOPIA: A REVIEW OF CASES OPERATED IN THE LAST 30 YEARS. | Valvular heart disease has been a significant cause of heart disease worldwide. In Ethiopia, it particularly affects young individuals and constitutes the major cause of cardiovascular disease. Factors associated with choice of treatment for advanced valvular heart disease are variable. The objective of this study is t... |
21,488 | [A New Algorithmic Method to Detect Ventricular Fibrillation Using Electrocardiogram Signals During Cardiopulmonary Resuscitation by Artificial Pressing]. | On account of the mechanical disturbance of external chest pressing to electrocardiogram(ECG)signal,the ECG rhythm cannot be identified reliably during the cardio-pulmonary resuscitation period.Whereas the possibility of successful resuscitation will be lowered due to interrupted external chest pressing,a new filtering... |
21,489 | Helium ventilation for treatment of post-cardiac arrest syndrome: A safety and feasibility study. | Besides supportive care, the only recommended treatment for comatose patients after cardiac arrest is target temperature management. Helium reduces ischaemic injury in animal models, and might ameliorate neurological injury in patients after cardiac arrest. As no studies exist on the use of helium in patients after car... |
21,490 | Catheter ablation versus medical rate control for persistent atrial fibrillation in patients with heart failure: A PRISMA-compliant systematic review and meta-analysis of randomized controlled trials. | The effectiveness of restoring the sinus rhythm by catheter ablation relative to that of medical rate control for persistent atrial fibrillation (AF) patients with heart failure (HF) remains to be defined.</AbstractText>We systematically searched Embase, Pubmed, the Cochrane Library, and ClinicalTrials.gov for articles... |
21,491 | Risk factors for cardiac events in patients with Brugada syndrome: A PRISMA-compliant meta-analysis and systematic review. | Inconsistent results have been reported about the risk stratification of patients with Brugada syndrome. We have summarized the evidence regarding the strength of association between 6 risk factors (family history of sudden cardiac death [SCD] or syncope, inducible ventricular arrhythmias on electrophysiology study [EP... |
21,492 | Energy Drink Consumption and Cardiac Complications: A Case for Caution. | We present a case of atrial fibrillation with rapid ventricular response in a 28-year-old previously healthy man in the context of daily consumption of 2 Monster energy drinks and 2 to 3 beers. We have obtained consent from this patient to present his case. Our observation adds to the developing literature describing a... |
21,493 | Silent and Malignant Early Repolarization Syndrome Mimicking Hyper-Acute ST Elevation Myocardial Infarction. | A 55-year-old male with underlying type 2 diabetes mellitus and hypertension presented at our emergency department with ventricular fibrillation-related cardiac arrest. Hyper-acute ST elevation myocardial infarction was the preliminary diagnosis by 12-lead electrocardiography, which simultaneously showed J point ST ele... |
21,494 | Noninvasive low-frequency electromagnetic stimulation of the left stellate ganglion reduces myocardial infarction-induced ventricular arrhythmia. | Noninvasive magnetic stimulation has been widely used in autonomic disorders in the past few decades, but few studies has been done in cardiac diseases. Recently, studies showed that low-frequency electromagnetic field (LF-EMF) might suppress atrial fibrillation by mediating the cardiac autonomic nervous system. In the... |
21,495 | Del Nido cardioplegia in the setting of minimally invasive aortic valve surgery. | The purpose of this study is to report our experience with del Nido cardioplegia (DNC) in the setting of minimally invasive aortic valve surgery. Forty-six consecutive patients underwent minimally invasive aortic valve replacement (AVR) through a "J" ministernotomy: twenty-five patients received the DNC (Group 1) and 2... |
21,496 | Syncope in Primary Prevention Implantable Cardioverter Defibrillator Patients. | Syncope is a common clinical condition spanning from benign to life-threatening diseases. There is sparse information on the outcomes of syncopal patients who received an implantable cardiac defibrillator (lCD) for primary prevention of sudden cardiac death (SCD).</AbstractText>To assess the outcomes and prognosis of p... |
21,497 | [The Protective Effect of Target Temperature Management Combined with Prostaglandin E₁ on Ischemia/Reperfusion Injury of Cerebral Micro-vascular Endothelium of ROSC Rat]. | To investigate the protective effect of target temperature management (TTM) combined with prostaglandin E₁ (PGE₁) on ischemia/reperfusion (I/R) injury of cerebral micro-vascular endothelium cell (CMEC) in the return of spontaneous circulation (ROSC) rats with successful cardiopulmonary resuscitation.</Abs... |
21,498 | [The wearable cardioverter/defibrillator : Temporary protection from sudden cardiac death]. | In the majority of cases sudden cardiac death (SCD) is caused by ventricular tachyarrhythmia. Implantable cardioverter-defibrillators (ICD) represent an evidence-based and established method for prevention of SCD. For patients who do not fulfill the criteria for guideline-conform implantation of an ICD but still have a... |
21,499 | A Neonate with Susceptibility to Long QT Syndrome Type 6 who Presented with Ventricular Fibrillation and Sudden Unexpected Infant Death. | BACKGROUND This is a case of a neonate with susceptibility to long QT syndrome (LQTS) who presented with a sudden unexpected infant death. Experts continue to debate whether universal electrocardiogram (ECG) screening of all newborns is feasible, practical, and cost-effective. CASE REPORT A 19-day-old neonate was found... |
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