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13,900 | Graves' disease--familiar foe, unfamiliar face. | A 38-year-old man from a remote tribal area of South India presented with right heart failure. On evaluation, he was found to have untreated Graves' disease (GD) with atrial fibrillation and pulmonary hypertension. The left ventricular function was normal. Secondary causes for pulmonary hypertension were ruled out. He ... |
13,901 | RECOVER evidence and knowledge gap analysis on veterinary CPR. Part 4: Advanced life support. | To systematically evaluate the evidence of the effect of advanced life support techniques on outcome in veterinary cardiopulmonary resuscitation (CPR) and to outline knowledge gaps.</AbstractText>Standardized, systematic evaluation of the literature, categorization of relevant articles according to level of evidence an... |
13,902 | High incidence of implantable cardioverter defibrillator malfunctions during radiation therapy: neutrons as a probable cause of soft errors. | To investigate the behaviour of the implantable cardioverter defibrillator (ICD) function during actual radiotherapy sessions.</AbstractText>Fifteen patients with an ICD underwent 17 radiation treatments for cancer [cumulative dose to the tumour was between 16 Gray (Gy) and 70 Gy; photon beams with maximum energies bet... |
13,903 | Global longitudinal strain predicts left ventricular dysfunction after mitral valve repair. | Despite a successful surgical procedure and adherence to current recommendations, postoperative left ventricular (LV) dysfunction after mitral valve repair (MVr) for organic mitral regurgitation (MR) may still occur. New approaches are therefore needed to detect subclinical preoperative LV dysfunction. LV global longit... |
13,904 | Expanding indications for resynchronization therapy. | Cardiac resynchronization therapy (CRT) is one of the major advances in the treatment of patients with chronic heart failure due to impaired left ventricular ejection fraction. Current guidelines recommend with the highest levels of recommendation and evidence CRT in patients with low ejection fraction wide QRS, LBBB, ... |
13,905 | Intermittent capture of the right ventricular outflow tract by atrial pacing in a patient with a dual-chamber pacemaker. | We describe a previously unreported phenomenon of intermittent outflow right ventricular tract capture from the atrial lead of a dual-chamber pacemaker. This was more obvious at slower paced atrial rates and disappeared by decreasing the atrial pulses voltage. Electroanatomical mapping showed that the onset of activati... |
13,906 | Improved survival of patients with coronary artery disease and low ejection fraction with ICD implantation versus conventional therapy in a real world survey. | Coronary artery disease (CAD) is associated with an increased risk for sudden cardiac death. Randomized controlled trials have shown that implantable cardioverter defibrillators (ICD) improve life expectancy unless they are implanted within the first days after an acute myocardial infarction and guidelines recommend th... |
13,907 | [Asymptomatic ventricular pre-excitation in children: a 17 year follow-up study]. | Results of long term clinic-electrophysiological follow-up of a large group of children with Wolf-Parkinson-White (WPW) phenomenon are present. From 1993 to 2011 we examined 176 children - 117 boys (66,5%) and 59 girls (33,5%) - with manifesting type of WPW. Age at first examination was 12.5+/-3.2 ( 0.1 18 ). In 66.5% ... |
13,908 | [Clinico-economical aspects of cardioversion of paroxysmal atrial fibrillation at phehospital stage and during hospitalization]. | We carried out clinico-economical analysis of 2 tactics of rhythm restoration in patients with paroxysmal atrial fibrillation (AF) lasting less than 48 hours: cardioversion at prehospital stage with intravenous procainamide and inhospital cardioversion with any method. This retrospective study was based on the data fro... |
13,909 | Increased pulse pressure independently predicts incident atrial fibrillation in patients with type 2 diabetes. | To examine whether baseline pulse pressure (PP), a marker of arterial stiffness, is associated with subsequent development of atrial fibrillation (AF) in type 2 diabetes.</AbstractText>A total of 350 type 2 diabetic patients, who were free from AF at baseline, were followed for 10 years. A standard electrocardiogram wa... |
13,910 | A dynamic risk score to identify increased risk for heart failure decompensation. | A method for combining heart failure (HF) diagnostic information in a Bayesian belief network (BBN) framework to improve the ability to identify when patients are at risk for HF hospitalization (HFH) is investigated in this paper. Implantable devices collect HF related diagnostics, such as intrathoracic impedance, atri... |
13,911 | Persistent angina pectoris, cardiac mortality and myocardial infarction during a 12 year follow-up in 273 variant angina patients without significant fixed coronary stenosis. | The incidence of cardiac events in patients with variant angina pectoris without significant coronary stenosis and ST-segment elevation was analyzed during a 12-year follow-up period in 273 consecutive patients (82% men) admitted from 1986 through 2010. Among the 252 patients who underwent electrocardiography during pa... |
13,912 | Interference of low frequency magnetic fields with implantable cardioverter-defibrillators. | The aim of this study was to find the electromagnetic interference (EMI) thresholds for several commonly used implantable cardioverter-defibrillators (ICD).</AbstractText>Seventeen ICDs were exposed to magnetic fields with different intensities produced by the Helmholtz coil system. Sinusoidal, pulse, ramp, and square-... |
13,913 | Left ventricular mass predicts left atrial appendage thrombus in persistent atrial fibrillation. | Atrial fibrillation (AF) can result in the development of left atrial appendage (LAA) thrombi. We sought to examine demographic and echocardiographic predictors of LAA thrombus in patients with persistent AF.</AbstractText>One hundred and sixty-five patients in persistent AF (36 with LAA thrombus and 129 without thromb... |
13,914 | Negative tension of scroll wave filaments and turbulence in three-dimensional excitable media and application in cardiac dynamics. | Scroll waves are vortices that occur in three-dimensional excitable media. Scroll waves have been observed in a variety of systems including cardiac tissue, where they are associated with cardiac arrhythmias. The disorganization of scroll waves into chaotic behavior is thought to be the mechanism of ventricular fibrill... |
13,915 | Calcium leak through ryanodine receptors leads to atrial fibrillation in 3 mouse models of catecholaminergic polymorphic ventricular tachycardia. | Atrial fibrillation (AF) is the most common cardiac arrhythmia, however the mechanism(s) causing AF remain poorly understood and therapy is suboptimal. The ryanodine receptor (RyR2) is the major calcium (Ca2+) release channel on the sarcoplasmic reticulum (SR) required for excitation-contraction coupling in cardiac mus... |
13,916 | Preprocedural imaging for patients with atrial fibrillation and heart failure. | Various electrophysiological procedures and device implantation has been shown to improve morbidity and mortality in patients with atrial fibrillation (AF) and patients with heart failure (HF). Noninvasive cardiac imaging is used extensively in the preprocedural patient selection and for procedural guidance. In this re... |
13,917 | Long-term survival in an un-operated single ventricle. | Single ventricle is a rare and complex congenital heart disease. Neonates with single ventricle have a high mortality. Survival into adulthood is rare without surgical intervention. A case of single ventricle with double inlet and double outlet combined with severe valvular pulmonary stenosis and mitral regurgitation (... |
13,918 | Transthoracic impedance for the monitoring of quality of manual chest compression during cardiopulmonary resuscitation. | The quality of cardiopulmonary resuscitation (CPR), especially adequate compression depth, is associated with return of spontaneous circulation (ROSC) and is therefore recommended to be measured routinely. In the current study, we investigated the relationship between changes of transthoracic impedance (TTI) measured t... |
13,919 | Electrocardiographic diagnosis of biventricular pacing in patients with nonapical right ventricular leads. | Assessment of left ventricular (LV) capture is of paramount importance in patients with biventricular (BiV) pacing. Our goal was to identify electrocardiographic features that differentiate between BiV and right ventricular (RV)-only pacing in patients with nonapical RV leads.</AbstractText>The study enrolled 300 conse... |
13,920 | Mobile telemonitoring for arrhythmias in outpatients in the Republic of Georgia: a brief report of a pilot study. | As the very first trial of mobile telemedicine in the Republic of Georgia, in June-December 2010 we investigated 35 outpatients with different types of arrhythmia (male/female ratio=16/19; 12-80 years old), among them 5 patients with concomitant epilepsy. The control group comprised 7 clinically healthy sportsmen (socc... |
13,921 | Vernakalant. Too dangerous in atrial fibrillation. | The usual aim of treatment for patients with symptomatic paroxysmal or recent-onset atrial fibrillation, including after cardiac surgery, is to slow the heart rate. Electrical and drug (amiodarone) cardioversion are other options. Vernakalant, an antiarrhythmic drug, has been authorised in the European Union for rapid ... |
13,922 | Ventricular fibrillation during coronary angiography in a patient with left dominant coronary artery ectasia. | The presence of coronary ectasias in otherwise normal epicardial coronary arteries are an infrequent angiographic finding. Coronary ectasia is not a benign condition and has been associated with a high risk of coronary events. In the present case, a patient with left dominant coronary artery ectasia who developed ventr... |
13,923 | [Cardioverter-defibrillator in the treatment of arrhythmia induced by trastuzumab used in the adjuvant setting in a patient with positive human epidermal growth factor receptor type-2 breast cancer]. | A case of a 36-year old woman with HER2-positive early breast cancer treated with adjuvant trastuzumab left ventricle dysfunction and cardiac arrest in ventricular fibrillation mechanism is presented. After having been successfully resuscitated, trastuzumab therapy was withheld, pharmacotherapy (beta-blocker, ACE-I) im... |
13,924 | A primer on arrhythmias in patients with hypertrophic cardiomyopathy. | Patients with hypertrophic cardiomyopathy are at risk of atrial and ventricular arrhythmias, yet treatment options for these patients are made almost solely by extrapolation from patients with other diseases. Heart block may be seen spontaneously but is especially prevalent following septal reduction strategies. Atrial... |
13,925 | "Benign" early repolarization versus malignant early abnormalities: clinical-electrocardiographic distinction and genetic basis. | In the great majority of cases the ECG pattern of early repolarization (ERP) is a benign phenomenon observed predominantly in teenagers, young adults, male athletes and the black race. The universally accepted criterion for its diagnosis is the presence, in at least two adjoining leads, of ≥ 1 mm or 0.1 mV ST se... |
13,926 | Prolonged spasm of the left anterior descending coronary artery. | Coronary artery spasm is one of the well-known causes of anginal chest pain. We presented the case of prolonged spasm of the left anterior descending coronary artery which happened during coronary angiography leading to pulse less state and low blood pressure with syncope and appearing of ventricular fibrillation on EC... |
13,927 | Left ventricular and left atrial thrombi in sinus rhythm patients with dilated ischemic cardiomyopathy.<Pagination><StartPage>155</StartPage><EndPage>158</EndPage><MedlinePgn>155-8</MedlinePgn></Pagination><Abstract><AbstractText Label="INTRODUCTION" NlmCategory="BACKGROUND">Ischemic dilated cardiomyopathy offers a fav... | Ischemic dilated cardiomyopathy offers a favorable terrain for left ventricular (LV) thrombus formation; however, left artial appendage (LAA) may be an additional source of thrombi in patients with dilated heart. The main objectives of this study were to determine the prevalence of LV and LAA thrombi in patients with c... |
13,928 | Wolff-Parkinson-White syndrome concomitant with idiopathic ventricular fibrillation associated with inferior early repolarization. | We encountered a 39-year-old man with documented ventricular fibrillation (VF). His ECGs showed intermittent Wolff-Parkinson-White (WPW) syndrome pattern. During electrophysiological study, no ventricular preexcitation was observed. An accessory pathway located at the posterior mitral annulus was identified, and succes... |
13,929 | Accelerated late gadolinium enhancement cardiac MR imaging with isotropic spatial resolution using compressed sensing: initial experience. | To evaluate the use of low-dimensional-structure self-learning and thresholding (LOST) compressed sensing acquisition and reconstruction in the assessment of left atrial (LA) and left ventricular (LV) scar by using late gadolinium enhancement (LGE) magnetic resonance (MR) imaging with isotropic spatial resolution.</Abs... |
13,930 | Evaluation of shock waveform configuration on the defibrillation capacity of implantable cardioverter defibrillators in dogs. | Implantable cardioverter defibrillators (ICD) are programmed to detect ventricular arrhythmias and terminate them by delivering an electrical shock. A defibrillation threshold (DFT) at least 10 J below the maximum device output is recommended for successful therapy. Shock waveform configuration is a programmable parame... |
13,931 | Prevalence, prognosis, and identification of the malignant form of early repolarization pattern in a population-based study. | Early repolarization pattern (ERP) has recently been associated with idiopathic ventricular fibrillation and with cardiovascular mortality in the general population. We aimed to identify electrocardiographic tools to differentiate the "malignant" form of ERP from benign ERP in a population-based study. We retrospective... |
13,932 | Cardiac involvement in leptospirosis. | Leptospirosis is a neglected global disease with significant morbidity and mortality. Cardiac complications such as chest pain, arrhythmias, pulmonary oedema and refractory shock have been reported in patients with severe disease. However, the frequency and extent of cardiac involvement in leptospirosis, are under-repo... |
13,933 | Development of rapid preexcited ventricular response to atrial fibrillation in a patient with intermittent preexcitation. | Intermittent preexcitation during sinus rhythm is indicative of an accessory pathway at a very low risk for sudden death. We present the case of a 49-year-old man with intermittent preexcitation who subsequently developed rapid atrial fibrillation with a shortest preexcited R-R interval of 230 milliseconds. Electrophys... |
13,934 | Safety of the open-irrigated ablation catheter for radiofrequency ablation: safety analysis from six clinical studies. | The open-irrigated catheter is used most frequently for atrial and ventricular radiofrequency ablation (RFA), and is often considered as the standard by which new ablation systems are compared. But few data have been published concerning its safety. This report provides a comprehensive safety analysis of the use of an ... |
13,935 | Preprocedural ventricular rate predicts subsequent sick sinus syndrome after ablation for long-standing persistent atrial fibrillation. | Concealed sick sinus syndrome may become manifest after restoration of sinus rhythm by ablation in patients with long-standing persistent atrial fibrillation (AF). The purpose of this study was to investigate the association between the preprocedural ventricular rate during AF and sinus node function in patients with l... |
13,936 | Significant reduction of fluoroscopy in pediatric catheter ablation procedures: long-term experience from a single center. | Traditionally fluoroscopy has been used for navigation of catheters during electrophysiological procedures. Recent advances in electroanatomic mapping technologies resulted in a decrease and even in elimination of fluoroscopy exposure during these procedures.</AbstractText>Electrophysiological procedures were performed... |
13,937 | Vasospastic angina with J-wave pattern and polymorphic ventricular tachycardia effectively treated with quinidine. | Myocardial ischemia during coronary spasm may generate malignant ventricular arrhythmias. The J-wave pattern was suggested to be a marker of a disorder associated with life-threatening arrhythmias.</AbstractText>We report the case of a patient with vasospastic angina and J-wave pattern in inferior and lateral leads ass... |
13,938 | Complete heart block following a blow on the chest by a soccer ball: a rare manifestation of commotio cordis. | Commotio cordis is a rare type of blunt cardiac injury in which low impact chest trauma causes sudden cardiac arrest, usually occurs from being struck by a projectile during sports. The most common arrhythmia during commotio cordis is ventricular fibrillation, although complete heart block and an idioventricular rhythm... |
13,939 | Therapeutic effect of surfactant inhalation during warm ischemia in an isolated rat lung perfusion model. | Warm ischemia-reperfusion injury related to donation after cardiac death donors is a crucial and inevitable issue. As surfactant function is known to deteriorate during warm ischemia, we hypothesized that surfactant inhalation during warm ischemia would mitigate warm ischemia-reperfusion injury. We used an isolated rat... |
13,940 | A review of literature on the adverse effects of hyperthyroidism on the heart functional behavior. | Thyroid hormones play an important role on the physiological chemistry of heart and vascular systems in healthy subjects. Any thyroid disorders accompanied with alteration of effective concentration of thyroid hormones cause heart dysfunctions. Thyrotoxicosis is a term given for the clinical manifestation of hyperthyro... |
13,941 | A case of Prinzmetal angina diagnosed by Holter monitoring who survived a sudden cardiac death: Case report. | A 47-year-old female patient was admitted to our hospital after a syncope. She reported episodes of angina in previous weeks. On admission, there were no electrocardiographic changes but elevated troponin. Coronary angiogram showed minimal arteriosclerosis and normal left ventricle. Holter monitoring showed severe ST-s... |
13,942 | A mutation in TNNC1-encoded cardiac troponin C, TNNC1-A31S, predisposes to hypertrophic cardiomyopathy and ventricular fibrillation. | Defined as clinically unexplained hypertrophy of the left ventricle, hypertrophic cardiomyopathy (HCM) is traditionally understood as a disease of the cardiac sarcomere. Mutations in TNNC1-encoded cardiac troponin C (cTnC) are a relatively rare cause of HCM. Here, we report clinical and functional characterization of a... |
13,943 | Modeling serum biomarkers S100 beta and neuron-specific enolase as predictors of outcome after out-of-hospital cardiac arrest: an aid to clinical decision making. | The aim of this study was to determine the added value of the serum biomarkers S100 and neuron-specific enolase to clinical characteristics for predicting outcome after out-of-hospital cardiac arrest.</AbstractText>Serum S100 beta (S100B) and neuron-specific enolase concentrations rise after brain injury.</AbstractText... |
13,944 | Defining abnormal electrocardiography in adult emergency department syncope patients: the Ottawa Electrocardiographic Criteria. | Previous studies have indicated that the suboptimal performance of the San Francisco Syncope Rule (SFSR) is likely due to the misclassification of the "abnormal electrocardiogram (ECG)" variable. We sought to identify specific emergency department (ED) ECG and cardiac monitor abnormalities that better predict cardiac o... |
13,945 | Spray cryotherapy is effective for bronchoscopic, endoscopic and open ablation of thoracic tissues. | Spray cryotherapy (SCT) delivers a liquid nitrogen spray via a catheter to produce cellular death. This study seeks to determine the histological changes after bronchoscopic, endoscopic and open SCT on tissues in the thoracic cavity.</AbstractText>Yorkshire pigs underwent flexible bronchoscopy, endoscopy and thoracotom... |
13,946 | [ECG changes in patients with chronic non-cancer pain: a prospective observational study]. | Patients with chronic non-cancer pain not only show reduced quality of life, but also chronic morbidity and increased mortality. However, little is known about prevalence and type of abnormal electrocardiogram (ECG) recordings in these individuals.</AbstractText>A total of 100 consecutive patients (≥ 18 y... |
13,947 | Hypoxic-ischemic brain injury and prognosis after cardiac arrest. | : Cardiac death is the leading cause of death in the United States, and patients who have out-of-hospital cardiac arrest have only a 1% to 10% survival rate, despite improvements in advanced life support. The neurologic sequelae of hypoxic-ischemic brain injury after cardiac arrest vary from subtle cognitive impairment... |
13,948 | Effects of prolonged mild hypothermia on cerebral blood flow after cardiac arrest. | The aim of the present study was to assess the cerebral blood flow and cerebral oxygen extraction in adult patients after pulseless electrical activity/asystole or resistant ventricular fibrillation who were treated with mild therapeutic hypothermia for 72 hrs.</AbstractText>Observational study.</AbstractText>Tertiary ... |
13,949 | Intracellular calcium dynamics, shortened action potential duration, and late-phase 3 early afterdepolarization in Langendorff-perfused rabbit ventricles. | To elucidate the mechanism of late-phase 3 early after depolarization (EAD) in ventricular arrhythmogenesis, we hypothesized that intracellular calcium (Ca(i) ) overloading and action potential duration (APD) shortening may promote late-phase 3 EAD and triggered activity, leading to development of ventricular fibrillat... |
13,950 | PPAR-alpha activation as a preconditioning-like intervention in rats in vivo confers myocardial protection against acute ischaemia-reperfusion injury: involvement of PI3K-Akt. | Peroxisome proliferator-activated receptors (PPAR) regulate the expression of genes involved in lipid metabolism, energy production, and inflammation. Their role in ischaemia-reperfusion (I/R) is less clear, although research indicates involvement of PPARs in some forms of preconditioning. This study aimed to explore t... |
13,951 | ECG changes in octogenarians. | Numerous studies have been done about the Electrocardiogram (ECG) in the elderly but just a few regarding the changes in ECG in octogenarians. Ageing is definitely associated with changes in the cardiac conduction and physiology. This study attempts to evaluate the ECG in octogenarians. ECG recordings from 165 octogena... |
13,952 | Postoperative tetralogy of fallot with concomitant atrial fibrillation and ventricular tachycardia. | Postoperative tetralogy of Fallot patients, since the first corrective surgical correction in the 1960s, have borne a burden of postoperation arrhythmias and sudden death. This is confirmed to be secondary to supraventricular arrhythmias and predominantly ventricular arrhythmias. It is rare to have both types of arrhyt... |
13,953 | Acute ventricular fibrillation during primary HIV infection. | Primary HIV infection normally shows an asymptomatic presentation or symptoms resembling infectious mononucleosis. However, severe unusual presentations have been reported. We report a case of acute ventricular fibrillation during primary HIV infection. Moreover, the rapid development of symptoms, the profound pancytop... |
13,954 | The usefulness of the consensus clinical diagnostic criteria in Brugada syndrome. | Consensus statements were proposed for the diagnosis of Brugada syndrome (BS). The clinical diagnostic criteria were defined as documented ventricular fibrillation or ventricular tachycardia (VT), family history of sudden cardiac death at <45 years, diagnostic ECGs of family members, inducibility of VT during electr... |
13,955 | Increased comorbidities in heart failure patients ≥ 85 years but declined from >90 years: data from the Swedish Heart Failure Registry. | Epidemiological studies of elderly heart failure (HF) patients (≥ 85 years) are limited with inconsistent findings. Our objective is to confirm and extend epidemiological study in elderly (≥ 85 years) patients using the Swedish Heart Failure Registry database.</AbstractText>This retrospective study includ... |
13,956 | Fragmented QRS may predict postoperative atrial fibrillation in patients undergoing isolated coronary artery bypass graft surgery. | Fragmented QRS complexes (fQRS) are defined as various RSR' patterns in 2 contiguous leads corresponding to a major coronary artery territory. Although the reason of association between fQRS and cardiac events was documented as cardiac fibrosis, the predictive role of fQRS was not studied for postoperative atrial fibri... |
13,957 | Emergency cardio-pulmonary bypass in cardiac arrest: seventeen years of experience. | Emergency cardiopulmonary bypass (E-CPB) is an advanced and rarely used procedure for patients in cardiac arrest that do not regain restoration of spontaneous circulation with standard resuscitation methods. The feasibility, safety and outcome of the intervention with E-CPB in cardiac arrest situations at our departmen... |
13,958 | Mineralocorticoid receptor antagonists and cardiovascular mortality in patients with atrial fibrillation and left ventricular dysfunction: insights from the Atrial Fibrillation and Congestive Heart Failure Trial. | Patients with heart failure (HF) and atrial fibrillation (AF) may differ from the larger HF population with respect to comorbidities, including renal impairment and overall prognosis. Associated cardiorenal interactions may mitigate the effects of pharmacological agents. Our primary objective was to assess the impact o... |
13,959 | Implantable cardioverter defibrillator shock embolizes an atrial septal occluder device in Brugada syndrome. | Implantable cardioverter defibrillators (ICDs) are indicated in patients with Brugada syndrome with resuscitated ventricular arrhythmias. When these patients have atrial septal defects, they also need closure to prevent paradoxic embolism of thrombus from the defibrillator leads. A 15-year-old boy with Brugada syndrome... |
13,960 | Pacing-facilitated proarrhythmia. | The implantable cardioverter-defibrillator (ICD) has been proven to reduce the mortality of patients with life-threatening ventricular arrhythmias, and has become the therapy of choice for patients with aborted sudden cardiac death or poorly tolerated ventricular tachycardias. Abrupt changes in ventricular cycle length... |
13,961 | The quality of cardiopulmonary resuscitation using supraglottic airways and intraosseous devices: a simulation trial. | To assess whether using interventions such as laryngeal mask airways (LMA) and IO lines lead to improved resuscitation in a simulated cardiac arrest when compared to standard methods of endotracheal intubation (ETI) and central line placement.</AbstractText>Emergency Medicine residents at a single academic center were ... |
13,962 | Mapping cardiac surface mechanics with structured light imaging. | Cardiovascular disease often manifests as a combination of pathological electrical and structural heart remodeling. The relationship between mechanics and electrophysiology is crucial to our understanding of mechanisms of cardiac arrhythmias and the treatment of cardiac disease. While several technologies exist for des... |
13,963 | Pulseless electrical activity after myocardial infarction: not always a left ventricular free wall rupture. | Pulseless electrical activity (PEA) after acute myocardial infarction is classically caused by ventricular free wall rupture. We report the case of a 76-year-old woman who presented a cardiac arrest with PEA 5 days after an embolic acute myocardial infarction. Transthoracic echocardiogram showed a massive mitral regurg... |
13,964 | Passive leg raising during cardiopulmonary resuscitation results in improved neurological outcome in a swine model of prolonged ventricular fibrillation. | The objective was to evaluate whether passive leg raising during cardiopulmonary resuscitation in a porcine model of prolonged ventricular fibrillation improves hemodynamics, return of spontaneous circulation, 24-hour survival, and neurological outcome.</AbstractText>Ventricular fibrillation was induced in 20 healthy L... |
13,965 | Cross-sectional study of cardiac resynchronization therapy in Spain. Indications, implant techniques, optimization and follow-up. | A cross-sectional study of cardiac resynchronization therapy use in Spain was performed to analyze problems with indications, implantation, and patient follow-up.</AbstractText>Spanish cardiac resynchronization therapy implanter centers were identified, then the department members were surveyed and the data were record... |
13,966 | Oscillation in cycle length induces transient discordant and steady-state concordant alternans in the heart. | Alternans is a beat-to-beat alternation of the cardiac action potential duration (APD) or intracellular calcium (Ca(i)) transient. In cardiac tissue, alternans can be spatially concordant or discordant, of which the latter has been shown to increase dispersion of repolarization and promote a substrate for initiation of... |
13,967 | Brugada syndrome 2012. | Brugada syndrome (BS) is a cardiac disorder characterized by typical ECG alterations, and it is associated with a high risk for sudden cardiac death (SCD), affecting young subjects with structurally normal hearts. The prevalence of this disorder is still uncertain, presenting marked geographical differences. The syndro... |
13,968 | Adenosine facilitates dormant conduction across cavotricuspid isthmus following catheter ablation. | Recurrence of trans-isthmus conduction following catheter ablation of common right atrial flutter (AFL) has been reported to be as high as 15%-31% at 3 months with invasive follow-up. Intravenous adenosine has previously been shown to facilitate acute, transient reconnection of pulmonary veins following catheter ablati... |
13,969 | A randomized-controlled pilot study comparing ICD implantation with and without intraoperative defibrillation testing in patients with heart failure and severe left ventricular dysfunction: a substudy of the RAFT trial. | The need to perform defibrillation testing (DT) at the time of implantable cardioverter defibrillator (ICD) insertion is controversial. In the absence of randomized trials, some regions now perform more than half of ICD implants without DT.</AbstractText>During the last year of enrolment in the Resynchronization for Am... |
13,970 | Prognostic value at 5 years of microvascular obstruction after acute myocardial infarction assessed by cardiovascular magnetic resonance. | Early and late microvascular obstruction (MVO) assessed by cardiovascular magnetic resonance (CMR) are prognostic markers for short-term clinical endpoints after acute ST-elevation myocardial infarction (STEMI). However, there is a lack of studies with long-term follow-up periods (>24 months).</AbstractText>STEMI pa... |
13,971 | Extracorporeal Life Support After Prolonged Resuscitation for In-Hospital Cardiac Arrest due to Refractory Ventricular Fibrillation: Two Cases Resulting in a Full Recovery. | Extracorporeal life support (ECLS) has well demonstrated its efficacy in treating in-hospital cardiac arrest and is being used for broader indications. However, ECLS after prolonged cardiopulmonary resuscitation (CPR) has been traditionally contraindicated and is now challenging. Here, we introduce two cases of success... |
13,972 | Videoscopic left cardiac sympathetic denervation for patients with recurrent ventricular fibrillation/malignant ventricular arrhythmia syndromes besides congenital long-QT syndrome. | Treatment options for patients with recurrent ventricular arrhythmias refractory to pharmacotherapy and ablation are minimal. Although left cardiac sympathetic denervation (LCSD) is well established in long-QT syndrome, its role in non-long-QT syndrome arrhythmogenic channelopathies and cardiomyopathies is less clear. ... |
13,973 | Predictors of sustained ventricular arrhythmias in cardiac resynchronization therapy. | Patients undergoing cardiac resynchronization therapy (CRT) are at high risk for ventricular arrhythmias (VAs), and risk stratification in this population remains poor.</AbstractText>This study followed 269 patients (left ventricular ejection fraction <35%; QRS >120 ms; New York Heart Association class III/IV) un... |
13,974 | Use of antiarrhythmic drugs in elderly patients. | Human aging is a global issue with important implications for current and future incidence and prevalence of health conditions and disability. Cardiac arrhythmias, including atrial fibrillation, sudden cardiac death, and bradycardia requiring pacemaker placement, all increase exponentially after the age of 60. It is im... |
13,975 | Oxidative Stress and Microcirculatory Flow Abnormalities in the Ventricles during Atrial Fibrillation. | Patients with atrial fibrillation (AF) often present with typical angina pectoris and mildly elevated levels of cardiac troponin (non-ST-segment elevation myocardial infarction) during an acute episode of AF. However, in a large proportion of these patients, significant coronary artery disease is excluded by coronary a... |
13,976 | The occurrence of cardiovascular disease during 5-year follow-up in patients with idiopathic atrial fibrillation. | Idiopathic atrial fibrillation (AF) may be an expression of as yet undetected underlying heart disease. We found it useful for clinical practice to study the long-term development of cardiovascular disease (CVD) in patients diagnosed with idiopathic AF.</AbstractText>Forty-one consecutive idiopathic AF patients (56 &#x... |
13,977 | Clinical implications of provocation tests for coronary artery spasm: safety, arrhythmic complications, and prognostic impact: multicentre registry study of the Japanese Coronary Spasm Association. | Provocation tests of coronary artery spasm are useful for the diagnosis of vasospastic angina (VSA). However, these tests are thought to have a potential risk of arrhythmic complications, including ventricular tachycardia (VT), ventricular fibrillation (VF), and brady-arrhythmias. We aimed to elucidate the safety and t... |
13,978 | Current issues in atrial fibrillation. | Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia. It places an enormous burden on the patients, caregivers, and the society at large. While the main themes in the care of an AF patient have not changed over the years and continue to focus on stroke prevention, control of the ventricular, rate an... |
13,979 | Ankyrin-B protein in heart failure: identification of a new component of metazoan cardioprotection. | Ankyrins (ankyrin-R, -B, and -G) are adapter proteins linked with defects in metazoan physiology. Ankyrin-B (encoded by ANK2) loss-of-function mutations are directly associated with human cardiovascular phenotypes including sinus node disease, atrial fibrillation, ventricular tachycardia, and sudden cardiac death. Desp... |
13,980 | How to improve flow during cardiopulmonary bypass in an acardia experimental model. | OBJECTIVES In extreme scenarios, such as hyperacute rejection of heart transplant, an urgent heart explantation might be necessary. The aim of this experimental study was to determine the feasibility and to improve the haemodynamics of a venoarterial cardiopulmonary bypass after cardiectomy. METHODS A venoarterial card... |
13,981 | The effect of spironolactone on ventricular tachyarrhythmias in patients with implantable cardioverter-defibrillators. | Previous studies have suggested that aldosterone blockade can reduce the incidence of ventricular tachycardia (VT) or ventricular fibrillation (VF) in patients with heart failure. The SPIronolactone to Reduce ICD Therapy (SPIRIT) trial was designed to test the hypothesis that spironolactone reduces the incidence of VT/... |
13,982 | Cardioprotective effect of δ-opioid receptor agonist vs. mild therapeutic hypothermia in a rat model of cardiac arrest with extracorporeal life support. | To compare the effect of δ-opioid receptor agonist, d-Ala2-d-Leu5 enkephalin (DADLE) with normothermic control and therapeutic hypothermia on post resuscitation myocardial function in a model of extracorporeal life support (ECLS).</AbstractText>Ventricular fibrillation (VF) was induced in male Wistar rats. After ... |
13,983 | Comparison of shock-first strategy and cardiopulmonary resuscitation-first strategy in a porcine model of prolonged cardiac arrest. | The choice of a shock-first or a cardiopulmonary resuscitation (CPR)-first strategy in the treatment of prolonged cardiac arrest (CA) is still controversial. The purpose of this study was to compare the effects of these strategies on oxygen metabolism and resuscitation outcomes in a porcine model of 8min CA.</AbstractT... |
13,984 | Amiodarone versus lidocaine and placebo for the prevention of ventricular fibrillation after aortic crossclamping: a randomized, double-blind, placebo-controlled trial. | Ventricular fibrillation occurs commonly after aortic crossclamping in patients undergoing cardiac surgery. Ventricular fibrillation increases myocardial oxygen consumption, and defibrillation may harm the myocardium. Thus, a pharmacologic approach to decreasing the incidence of ventricular fibrillation or the number o... |
13,985 | Early and simple detection of diastolic dysfunction during weaning from mechanical ventilation. | Weaning from mechanical ventilation imposes additional work on the cardiovascular system and can provoke or unmask left ventricular diastolic dysfunction with consecutive pulmonary edema or systolic dysfunction with inadequate increase of cardiac output and unsuccessful weaning. Echocardiography, which is increasingly ... |
13,986 | Antitachycardia pacing reduces appropriate and inappropriate shocks in children and congenital heart disease patients. | Antitachycardia pacing (ATP) can reduce implantable cardioverter-defibrillator shocks, but its use in children and patients with congenital heart disease (CHD) is not well described.</AbstractText>To review the efficacy of ATP in children and patients with CHD.</AbstractText>We reviewed implantable cardioverter-defibri... |
13,987 | Polymorphic ventricular tachycardia in a patient with hypertrophic cardiomyopathy and digitalis intoxication. | We report the case of a 74-year-old woman who presented with recurrent episodes of polymorphic ventricular tachycardia (PVT) with a normal QT interval due to digitalis intoxication (serum digoxin concentration, 5.0 ng/mL) and severe hyperkalemia (serum potassium level, 8.3 mEq/L). In addition, laboratory data showed el... |
13,988 | Effect of nebivolol on outcome in elderly patients with heart failure and atrial fibrillation: insights from SENIORS. | Beneficial effects of beta-blockade remain unclear in heart failure patients who have atrial fibrillation (AF), especially in the elderly. We evaluated the effect of nebivolol on cardiovascular outcomes in elderly patients with heart failure and AF.</AbstractText>The SENIORS trial showed an overall benefit of nebivolol... |
13,989 | Sodium current deficit and arrhythmogenesis in a murine model of plakophilin-2 haploinsufficiency. | The shRNA-mediated loss of expression of the desmosomal protein plakophilin-2 leads to sodium current (I(Na)) dysfunction. Whether pkp2 gene haploinsufficiency leads to I(Na) deficit in vivo remains undefined. Mutations in pkp2 are detected in arrhythmogenic right ventricular cardiomyopathy (ARVC). Ventricular fibrilla... |
13,990 | Increased left ventricular myocardial mass is associated with arrhythmias after cardiac surgery. | The purpose of this study was to investigate whether patients with an elevated left ventricular mass index undergoing cardiac surgery were more likely to experience postoperative atrial and ventricular arrhythmias.</AbstractText>A retrospective analysis.</AbstractText>A single tertiary care university hospital.</Abstra... |
13,991 | Index-beat assessment of left ventricular systolic and diastolic function during atrial fibrillation using myocardial strain and strain rate. | Accurate assessment of left ventricular (LV) function in patients with atrial fibrillation (AF) remains difficult, mainly because of the beat-to-beat variability of many echocardiographic parameters. The aim of this study was to assess the hypothesis that LV function can be estimated from an index-beat echocardiographi... |
13,992 | Measuring left ventricular peak longitudinal systolic strain from a single beat in atrial fibrillation: validation of the index beat method. | It is traditionally difficult to estimate left ventricular (LV) systolic function in atrial fibrillation (AF). The aim of this study was to validate the use of an index beat, the beat after the nearly equal preceding (RR1) and pre-preceding (RR2) intervals, for the measurement of LV peak longitudinal systolic strain (P... |
13,993 | Ventricular fibrillation as primary presentation of takotsubo cardiomyopathy after complicated cesarean delivery. | Takotsubo cardiomyopathy typically affects post-menopausal women under severe psychological or physical stress; it also has been reported to develop after medical procedures or surgery. We herein report the rare case of a 30-year-old woman who presented with an episode of ventricular fibrillation after a very complicat... |
13,994 | Heparin does not improve graft function in uncontrolled non-heart-beating lung donation: an experimental study in pigs. | Non-heart-beating donation (NHBD) has the potential to increase the number of patients treated with lung transplantation. Our study investigated, in a simulated clinical situation in the uncontrolled NHBD setting, whether or not heparin administration after death affects the donor lung function.</AbstractText>Twelve Sw... |
13,995 | Comparison of intravenous and oral magnesium replacement in hospitalized patients with cardiovascular disease. | The results of an investigation of serum magnesium concentrations (SMCs) after i.v. versus oral delivery of magnesium in cardiovascular critical care are presented.</AbstractText>A retrospective case review was conducted to compare the net gain of magnesium after i.v. (n = 188) or oral (n = 164) magnesium therapy for t... |
13,996 | The role of fine-scale anatomical structure in the dynamics of reentry in computational models of the rabbit ventricles. | Fine-scale anatomical structures in the heart may play an important role in sustaining cardiac arrhythmias. However, the extent of this role and how it may differ between species are not fully understood. In this study we used computational modelling to assess the impact of anatomy upon arrhythmia maintenance in the ra... |
13,997 | Association of pulse pressure with new-onset atrial fibrillation in patients with hypertension and left ventricular hypertrophy: the Losartan Intervention For Endpoint (LIFE) reduction in hypertension study. | Previous studies have found pulse pressure (PP), a marker of arterial stiffness, to be an independent predictor of atrial fibrillation (AF) in general and hypertensive populations. We examined whether PP predicted new-onset AF in comparison with other blood pressure components in the Losartan Intervention For Endpoint ... |
13,998 | Quantification of not-dipolar components of atrial depolarization by principal component analysis of the P-wave. | Principal component analysis (PCA) of the T-wave has been demonstrated to quantify the dipolar and not-dipolar components of the ventricular activation, the latter reflecting repolarization heterogeneity. Accordingly, the PCA of the P-wave could help in analyzing the heterogeneous propagation of sinus impulses in the a... |
13,999 | Decreased TSP-1 following percutaneous coronary intervention is associated with major adverse cardiac events in ST-elevation myocardial infarction. | TSP-1 is a vasoconstrictive protein, which is released from both endothelium and cardiomyocytes during ischemia and promotes platelet aggregation and adhesion to subendothelial layers in atherosclerotic lesions. During myocardial ischemia and reperfusion, TSP-1 disturbs local microcirculation by disrupting both NO-sign... |
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