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13,600 | Assessment of left atrial deformation and synchrony by three-dimensional speckle-tracking echocardiography: comparative studies in healthy subjects and patients with atrial fibrillation. | The aim of this study was to examine whether left atrial (LA) strain and synchrony can be assessed using three-dimensional (3D) speckle-tracking echocardiography (STE) and how 3D STE parameters are modified by atrial fibrillation (AF).</AbstractText>LA peak ventricular systolic longitudinal strain (LSs), circumferentia... |
13,601 | Effect of ranolazine in preventing postoperative atrial fibrillation in patients undergoing coronary revascularization surgery. | <AbstractText Label="BACKGROUND/OBJECTIVE" NlmCategory="OBJECTIVE">Ranolazine is a new anti-ischemic agent approved for chronic angina with additional electrophysiologic properties. The purpose of the present trial was to investigate its effect in preventing postoperative atrial fibrillation (POAF) after on-pump corona... |
13,602 | Long-term results of transcatheter atrial fibrillation ablation in patients with impaired left ventricular systolic function. | Long-term outcome of AF ablation in patients with impaired LVEF is unknown. The aim of this study is to evaluate sinus rhythm (SR) maintenance, clinical status, and echocardiographic parameters over a long-term period following atrial fibrillation (AF) transcatheter ablation in patients with left ventricular ejection f... |
13,603 | Ventricular fibrillation induced by spontaneous hypothermia in a patient with early repolarization syndrome. | The early repolarization (ER) pattern on ECG was originally described in the context of hypothermia.</AbstractText>We present the case of a 34-year-old male with cardiac arrest in the context of spontaneous hypothalamic mediated thermal dysregulation after intracranial hemorrhage. Ventricular fibrillation with a marked... |
13,604 | Recurrent syncope in a hypertensive subject with vascular cognitive impairment and permanent pacemaker. | Syncope following permanent pacemaker (PM) implantation is a nightmare for electrophysiologists. We describe a case of daily recurrent syncope in an 84-year-old man having a dual-chamber pacemaker implanted for complete atrio-ventricular block occurred 4 years before the admission to our department. He had a history of... |
13,605 | In-hospital mortality and long-term survival after coronary artery bypass surgery in young patients. | Coronary artery bypass graft (CABG) is performed for symptomatic and prognostic reasons. We aimed to determine the factors that contribute to in-hospital mortality and long-term survival in young patients (aged less than 65) undergoing CABG.</AbstractText>A prospective database was retrospectively analysed and cross-co... |
13,606 | Is heart failure guideline adherence being underestimated? The impact of therapeutic contraindications. | Several studies based on claims data have reported underutilization of evidence-based heart failure (HF) therapies. The degree to which these estimates fail to account for therapeutic contraindications is unclear.</AbstractText>We identified patients with HF and left ventricular ejection fraction ≤45% seen betwe... |
13,607 | Impaired left ventricular function as a predictive factor for mid-term survival in octogenarians after primary coronary artery bypass surgery. | The impact of preoperative impaired left ventricular ejection fraction (EF) in octogenarians following coronary bypass surgery on short-term survival was evaluated in this study.</AbstractText>A total of 147 octogenarians (mean age 82.1 ± 1.9 years) with coronary artery diseases underwent elective coronary artery ... |
13,608 | The effect of acute versus delayed remote ischemic preconditioning on reperfusion induced ventricular arrhythmias. | The effect of remote ischemic preconditioning (RIPC) on arrhythmias in in vivo models is unknown. Our purpose was to determine effects of both acute and delayed RIPC on arrhythmias.</AbstractText>In the acute protocol anesthetized open chest rats were exposed to 5 minutes of proximal left coronary artery occlusion (CAO... |
13,609 | Investigation into causes of abnormal cerebral MRI findings following PVAC duty-cycled, phased RF ablation of atrial fibrillation. | Left atrial catheter ablation of the pulmonary veins (PVs) is an established option for patients with atrial fibrillation (AF). Asymptomatic cerebral emboli (ACE) detected by diffusion weighted MRI (DW-MRI) following AF ablation has been reported at varying rates. This variability may be linked to procedural variables ... |
13,610 | Total beta-adrenoceptor knockout slows conduction and reduces inducible arrhythmias in the mouse heart. | Beta-adrenoceptors (β-AR) play an important role in the neurohumoral regulation of cardiac function. Three β-AR subtypes (β(1), β(2), β(3)) have been described so far. Total deficiency of these adrenoceptors (TKO) results in cardiac hypotrophy and negative inotropy. TKO represents a unique... |
13,611 | [Use of cardiac MRI in the field of electrophysiology. Present status and future aspects]. | In recent years, ablation therapy has become the first-line treatment of modern electrophysiology in patients with cardiac arrhythmias. Today, cardiac magnetic resonance imaging (cMRI) is an important supportive imaging technique in the implementation of complex electrophysiological investigations and ablation therapy.... |
13,612 | A classification scheme for ventricular arrhythmias using wavelets analysis. | Identification and classification of ventricular arrhythmias such as rhythmic ventricular tachycardia (VT) and disorganized ventricular fibrillation (VF) are vital tasks in guiding implantable devices to deliver appropriate therapy in preventing sudden cardiac deaths. Recent studies have shown VF can exhibit strong reg... |
13,613 | Idiopathic ventricular fibrillation, early repolarization and other J wave-related ventricular fibrillation syndromes: from an electrocardiographic enigma to an electrophysiologic dogma. | Current clinical and experimental data demonstrate that the electrocardiographic J wave plays a critical role in the pathogenesis of ventricular fibrillation (VF) in patients with Brugada syndrome (BS) and early repolarization (ER) syndrome (ERS). This has generated renewed interest in the presence of J waves and ERS i... |
13,614 | Conduction slowing contributes to spontaneous ventricular arrhythmias in intrinsically active murine RyR2-P2328S hearts. | The familial condition catecholaminergic polymorphic ventricular tachycardia (CPVT) is characterized by episodic bidirectional ventricular tachycardia (BVT), polymorphic ventricular tachycardia (PVT), and ventricular fibrillation following adrenergic challenge. It is associated with mutations involving the cardiac ryan... |
13,615 | Clinical characteristics, mortality, cardiac hospitalization, and ventricular arrhythmias in patients undergoing CRT-D implantation: results of the ACTION-HF study. | The characteristics and outcomes of patients who undergo cardiac resynchronization therapy (CRT) device implantation in current clinical practice may differ from those of reference trial populations. Study objectives were to assess 2-year outcomes in a population implanted with a CRT plus defibrillator device in accord... |
13,616 | [Age-related peculiarities and determinating factors of atrial fibrillation]. | The principal aim of the study was to investigate the causes and clinical features of atrial fibrillation (AF) in patients of two age groups--(1) 40-59 years and (2) 60 and elder. 454 male and female patients of the cardiology department were studied. This article discusses recent concepts of the mutual influence of AF... |
13,617 | Global Psychological Distress and Risk of Atrial Fibrillation Among Women: The Women's Health Study. | Symptoms of psychological distress and depression have been associated with risk of ventricular arrhythmias and sudden cardiac death. Their relationship with atrial arrhythmias, however, is less well studied.</AbstractText>We sought to assess the long-term relations between psychological distress and risk of atrial fib... |
13,618 | Incremental Reduction in Risk of Death Associated With Use of Guideline-Recommended Therapies in Patients With Heart Failure: A Nested Case-Control Analysis of IMPROVE HF. | Several therapies are guideline-recommended to reduce mortality in patients with heart failure (HF) and reduced left ventricular ejection fraction, but the incremental clinical effectiveness of these therapies has not been well studied. We aimed to evaluate the individual and incremental benefits of guideline-recommend... |
13,619 | Sleep-disordered breathing in patients with implantable cardioverter-defibrillator. | To assess the prognostic significance of screening for sleep-disordered breathing in patients with implantable cardioverter-defibrillator (ICD) with regard to appropriate ICD therapy and total mortality.</AbstractText>Overnight sleep studies were performed in 204 ICD recipients not known to have sleep apnoea and with n... |
13,620 | Atrial fibrillation with wide QRS tachycardia and undiagnosed Wolff-Parkinson-White syndrome: diagnostic and therapeutic dilemmas in a pediatric patient. | A 10-year-old girl presented to the emergency department of a regional hospital with 1 episode of generalized tonic-clonic seizures. Postictal monitoring followed by a 12-lead electrocardiogram showed fast atrial fibrillation with intermittent wide QRS regular tachycardia. Immediately following this, her rhythm changed... |
13,621 | Electrophysiological effects of acute atrial stretch on persistent atrial fibrillation in patients undergoing open heart surgery. | The electrophysiologic effects of acute atrial dilatation and dedilatation in humans with chronic atrial fibrillation remains to be elucidated.</AbstractText>To study the electrophysiological effects of acute atrial dedilatation and subsequent dilatation in patients with long-standing persistent atrial fibrillation (AF... |
13,622 | Blunted proarrhythmic effect of nicorandil in a Langendorff-perfused phase-2 myocardial infarction rabbit model. | Nicorandil (a K(ATP) opener) administration is reported to reduce ventricular arrhythmias 4.8 ± 2.2 hours after myocardial infarction (MI). The electrophysiological changes and the effects on dynamic factors and dynamically induced spatially discordant alternans by nicorandil during phase-2 MI are unclear.</Abstra... |
13,623 | Arrhythmogenic risk of pulmonary artery catheterisation in patients with severe aortic stenosis undergoing transcatheter aortic valve implantation. | Many clinicians consider severe aortic stenosis to be a contraindication to pulmonary artery catheterisation, except during open heart surgery with cardiopulmonary bypass. This is due to the perceived high risk of arrhythmia, although the true incidence of ventricular tachycardia and fibrillation remains unclear. We co... |
13,624 | Predictors of high defibrillation threshold in the modern era. | High defibrillation threshold (DFT) is a clinical problem in 1-8% of implantable cardioverter-defibrillator implants. Some clinicians and investigators question whether the benefits of routine DFT testing outweigh the risks. Identification of the predictors of elevated DFT may allow selective application of DFT testing... |
13,625 | Prolonged atrial effective refractory periods in atrial fibrillation patients associated with structural heart disease or sinus node dysfunction compared with lone atrial fibrillation. | Atrial fibrillation (AF) is commonly associated with structural heart disease (SHD) or sinus node dysfunction (SND). We hypothesized that regional atrial effective refractory period (ERP) is different in patients with SHD/SND from lone AF.</AbstractText>We included 648 patients with AF (age, 56.0 ± 11.0 years; mal... |
13,626 | Potassium-induced conversion of ventricular fibrillation after aortic declamping. | The anti-fibrillatory effect of potassium is well recognized from experimental models. There have, however, been very few clinical reports on the use of potassium to convert ventricular fibrillation (VF) after cardioplegic arrest.</AbstractText>In total, 8465 adult patients undergoing cardiac operations on cardiopulmon... |
13,627 | Mathematical modeling of atrial fibrillation. | Electrical activity of the heart during ventricular fibrillation was modeled as a sum of N independent pulse streams with various amplitude-frequency and phase characteristics. The data of computational experiments were compared with the results of actual physiological experiments on dogs. Identification of the model w... |
13,628 | Comparison of four single-drug regimens on ventricular rate and arrhythmia-related symptoms in patients with permanent atrial fibrillation. | Rate control of atrial fibrillation (AF) is a main treatment modality. However, data are scarce on the relative efficacy of calcium channel blockers and β blockers or between drugs within each class. The purpose of the present study was to compare the effect of 4 rate-reducing, once-daily drug regimens on the ven... |
13,629 | Implantable cardioverter defibrillator shocks are prospective predictors of anxiety. | To examine the temporal contingency of anxiety and implantable cardioverter defibrillator (ICD) therapy (anti-tachycardia-pacing and shocks to prevent ventricular tachycardia and/or fibrillation).</AbstractText>It is under debate whether anxiety is a precursor and/or consequence of ICD-therapy.</AbstractText>In a prosp... |
13,630 | Mechanical discoordination increases continuously after the onset of left bundle branch block despite constant electrical dyssynchrony in a computational model of cardiac electromechanics and growth. | To test whether a functional growth law leads to asymmetric hypertrophy and associated changes in global and regional cardiac function when integrated with a computational model of left bundle branch block (LBBB).</AbstractText>In recent studies, we proposed that cardiac myocytes grow longer when a threshold of maximum... |
13,631 | Management of ventricular and atrial arrhythmias in humans: towards a patient-specific approach. | The strategy of sudden cardiac death prevention by implantable cardioverter defibrillator, in primary prevention, is mainly based on the value of ejection fraction. That means that the approach is not really patient specific. A lot of implanted patients will not receive any shock. The implantation of large categories o... |
13,632 | Low doses of intravenous epinephrine for refractory sustained monomorphic ventricular tachycardia. | We report three cases of sustained monomorphic ventricular tachycardia (VT) in the setting of coronary artery disease, resistant to beta-blockers in two patients and to amiodarone in all, successfully terminated by low doses of intravenous (IV) epinephrine. VT was the first manifestation of coronary artery disease in o... |
13,633 | Effects of short-term administration of estradiol on reperfusion arrhythmias in rats of different ages. | Little is known about age-related differences in short-term effects of estradiol on ischemia-reperfusion (I/R) insults. The present study was designed to evaluate the effects of short-term treatment with estradiol on reperfusion arrhythmias in isolated hearts of 6-7-week-old and 12-14-month-old female rats. Wistar rats... |
13,634 | Role of late sodium channel current block in the management of atrial fibrillation. | The anti-arrhythmic efficacy of the late sodium channel current (late I(Na)) inhibition has been convincingly demonstrated in the ventricles, particularly under conditions of prolonged ventricular repolarization. The value of late I(Na) block in the setting of atrial fibrillation (AF) remains poorly investigated. All s... |
13,635 | The neuroprotective effects of intraperitoneal injection of hydrogen in rabbits with cardiac arrest. | The purpose of this study was to investigate the neuroprotective effects of intraperitoneal injection of hydrogen (H2) in rabbits with cardiac arrest (CA).</AbstractText>A rabbit model of CA was established by the delivery of alternating current between the esophagus and chest wall to induce ventricular fibrillation. B... |
13,636 | Ventricular fibrillation resulting from diaphragmatic stimulation during gastric bypass surgery. | Gastric bypass operations are common and severely obese patients are prone to arrhythmias, particularly atrial fibrillation. Intraoperative ventricular arrhythmias during bariatric surgery have not been reported previously.</AbstractText>A 35-year-old, severely obese, diabetic woman with no other prior medical history ... |
13,637 | Inhibition of p38 MAPK during ischemia, but not reperfusion, effectively attenuates fatal arrhythmia in ischemia/reperfusion heart. | The mitogen-activated protein kinases (MAPKs) play an important role in ischemia/reperfusion (I/R) injury. Previous evidence suggests that p38 MAPK inhibition before ischemia is cardioprotective. However, whether p38 MAPK inhibition during ischemia or reperfusion provides cardioprotection is not well known. We tested t... |
13,638 | Increasing survival rate from commotio cordis. | Commotio cordis events due to precordial blows triggering ventricular fibrillation are a cause of sudden death (SD) during sports and also daily activities. Despite the absence of structural cardiac abnormalities, these events have been considered predominantly fatal with low survival rates.</AbstractText>To determine ... |
13,639 | Tpeak - Tend and Tpeak - Tend /QT ratio as markers of ventricular arrhythmia risk in cardiac resynchronization therapy patients. | Cardiac resynchronization therapy (CRT) increases transmural dispersion of repolarization (TDR) and can be pro-arrhythmic. However, overall arrhythmia risk was not increased in large-scale CRT clinical trials. Increased TDR as measured by T(peak ) -T(end) (TpTe) was associated with arrhythmia risk in CRT in a single-ce... |
13,640 | Emergency department factors associated with survival after sudden cardiac arrest. | Sudden cardiac arrest (SCA) is a leading cause of death in the US. Recent innovations in post-arrest care have been demonstrated to increase survival. However, little is known about the impact of emergency department (ED) and hospital characteristics on survival to hospital admission and ultimate outcome.</AbstractText... |
13,641 | Initial bispectral index may identify patients who will awaken during therapeutic hypothermia after cardiac arrest: a retrospective pilot study. | Patients sustain a range of neurologic injuries after cardiac arrest, and determining which patients should be treated with therapeutic hypothermia (TH) is complex, often confounded by sedation and neuromuscular blockade (NMB). We evaluated bispectral index (BIS) monitoring as a tool to identify adult patients that awa... |
13,642 | Results of clinical application of the modified maze procedure as concomitant surgery. | Atrial fibrillation is the most common cardiac arrhythmia and is associated with significant morbidity and mortality. The classic cut-and-sew maze procedure is successful in 85-95% of patients. However, the technical complexity has prompted modifications of the maze procedure. The objective of this study was to retrosp... |
13,643 | Usefulness of inducible ventricular tachycardia to predict long-term adverse outcomes in arrhythmogenic right ventricular cardiomyopathy. | The role of the electrophysiologic (EP) study for risk stratification in patients with arrhythmogenic right ventricular cardiomyopathy is controversial. We investigated the role of inducible sustained monomorphic ventricular tachycardia (SMVT) for the prediction of an adverse outcome (AO), defined as the occurrence of ... |
13,644 | Outpatient cardiac telemetry detects a high rate of atrial fibrillation in cryptogenic stroke. | The etiology of cerebral ischemia is undetermined in one-third of patients upon discharge. Occult paroxysmal atrial fibrillation (PAF) is considered a potential etiology. A high rate of PAF detection with 21-day mobile cardiac outpatient telemetry (MCOT) has been reported in two small studies. Optimal monitoring durati... |
13,645 | Twelve-lead electrocardiography in the young: physiologic and pathologic abnormalities. | BACKGROUND/ OBJECTIVE: The purpose of the present study was to analyze the prevalence of physiologic and pathologic ECG abnormalities in a cohort of young conscripts that represents the whole young generation of today.</AbstractText>ECGs of all Swiss citizens who underwent conscription for the army during a 29-month pe... |
13,646 | Ventricular arrhythmias and sudden cardiac death. | Management strategies for ventricular arrhythmias are guided by the risk of sudden death and severity of symptoms. Patients with a substantial risk of sudden death usually need an implantable cardioverter defibrillator (ICD). Although ICDs effectively end most episodes of ventricular tachycardia or ventricular fibrilla... |
13,647 | Ventricular arrhythmias: device therapy and ablation. | There are few randomized, well-controlled studies to guide decision making with respect to the treatment of ventricular arrhythmias in the elderly treated with either device implantation or catheter ablation. Although some data are conflicting, the elderly appear to have a greater degree of risk related to treatment co... |
13,648 | Mechanisms of arrhythmias and conduction disorders in older adults. | Aging is associated with an increased prevalence of cardiac arrhythmias, which contribute to higher morbidity and mortality in the elderly. The frequency of cardiac arrhythmias, particularly atrial fibrillation and ventricular tachyarrhythmia, is projected to increase as the population ages, greatly impacting health ca... |
13,649 | Further insights into the underlying electrophysiological mechanisms for reduction of atrial fibrillation by ranolazine in an experimental model of chronic heart failure. | Ranolazine (RAN) was reported to be effective and safe in converting atrial fibrillation (AF) to sinus rhythm by administration of a single dose ('pill in the pocket') to patients with structural heart disease. This study examines the underlying mechanisms for the antiarrhythmic benefit of RAN application in chronic he... |
13,650 | [Anticoagulant therapy in connection with cardioversion in patients with atrial fibrillation]. | We present data on possibility of anticoagulant therapy in conjunction with electrical cardioversion in patients with atrial fibrillation using novel anticoagulant - dabigatran - and a case of successful lysis of thrombus in the left ventricular cavity at the background of its administration. |
13,651 | Right atrial preference pacing algorithm in the prevention of paroxysmal atrial fibrillation in myotonic dystrophy type 1 patients: a long term follow-up study. | Atrial Preference Pacing (APP) is a pacemaker (PM) algorithm that works by increasing the atrial pacing rate to achieve continuous suppression of a spontaneous atrial rhythm and prevent supraventricular tachyarrhythmias. We have previously shown that atrial preference pacing may significantly reduce the number and the ... |
13,652 | High signal intensity on T2-weighted cardiac magnetic resonance imaging correlates with the ventricular tachyarrhythmia in hypertrophic cardiomyopathy. | Late gadolinium enhancement (LGE) with cardiac magnetic resonance (CMR) can predict ventricular arrhythmia and poor prognosis in hypertrophic cardiomyopathy (HCM) patients. Although myocardial T2-high signal has been reported to appear within LGE in those patients, its clinical significance remains unclear. We investig... |
13,653 | [Clinical characteristics, management and prognostic evolution of patients admitted within six hours of symptom onset with st-segment elevation acute myocardial infarction complicated by cardiogenic shock : twenty year monocentric study]. | Cardiogenic shock is one of the most serious complications of the acute myocardial infarction. Advances in interventional cardiology and early reperfusion strategy improved its management.</AbstractText>Analysis of the clinical characteristics, management and prognostic evolution of patients admitted within 6 hours ons... |
13,654 | [Public access defibrillation in the Sorrento Peninsula]. | Early cardiac defibrillation is the only effective therapy to stop ventricular fibrillation or pulseless ventricular tachycardia. It is still considered the gold standard for the treatment of ventricular tachycardia/fibrillation, and is the only intervention capable of improving survival in cardiac arrest survivors. Ti... |
13,655 | [Subcutaneous implantable cardioverter-defibrillators]. | Transvenous implantable cardioverter-defibrillators (ICD) for the primary and secondary prevention of sudden cardiac death due to ventricular tachycardia/fibrillation have led to a significant improvement in survival in high-risk populations. Although conventional transvenous ICD therapy is currently widely used, it is... |
13,656 | Subclinical cardiomyopathy and long QT syndrome: an echocardiographic observation. | Long QT syndrome (LQTS) is a cardiac channelopathy predisposing to syncope and sudden death secondary to LQT-triggered ventricular arrhythmias. Long QT syndrome has been regarded as a purely electrical disease. Recent reports have shown by echocardiography that LQTS patients have contraction abnormalities that are asso... |
13,657 | Atrial fibrillation-associated remodeling does not promote atrial thrombus formation in canine models. | The most important complication of atrial fibrillation (AF) is thromboembolic stroke. Although AF-related remodeling is considered important in atrial thrombogenesis, its role never has been directly tested. This study assessed effects of AF-related remodeling on the atrial thrombogenic milieu by using radiofrequency a... |
13,658 | Does chronic atrial fibrillation induce cardiac remodeling? | The aim of this study was to compare cardiac structure and function in patients with chronic atrial fibrillation (CAF), as opposed to patients with paroxysmal atrial fibrillation (PAF), and normal control subjects.</AbstractText>This study included 83 patients, divided into 3 groups: group A, 32 patients with CAF for &... |
13,659 | Complete absence of precordial R waves due to absence of left-sided pericardium. | Poor R-wave progression (PRWP) in the precordial leads on random ECG is relatively frequent in the general population and includes a broad differential diagnosis. Here, we present for the first time a case of complete absence of precordial R waves associated with a prominent R wave in aVR due to the absence of the left... |
13,660 | A family with recurrent sudden death and no clinical clue. | Sudden cardiac death of a child is a devastating event for the family and an enormous challenge for the attending physician.</AbstractText>We report a family with repeat events of sudden cardiac death and recurrent ventricular fibrillation in a teenage girl, where autopsy data and clinical investigations were inconclus... |
13,661 | Ventricular response during lungeing exercise in horses with lone atrial fibrillation. | Atrial fibrillation (AF) is the most important dysrhythmia affecting performance in horses and has been associated with incoordination, collapse and sudden death. Limited information is available on ventricular response during exercise in horses with lone AF.</AbstractText>To investigate ventricular response in horses ... |
13,662 | Cardiopulmonary resuscitation: a historical perspective leading up to the end of the 19th century. | Social laws and religious beliefs throughout history underscore the leaps and bounds that the science of resuscitation has achieved from ancient times until today. The effort to resuscitate victims goes back to ancient history, where death was considered a special form of sleep or an act of God. Biblical accounts of re... |
13,663 | Desipramine pretreatment improves sympathetic remodeling and ventricular fibrillation threshold after myocardial ischemia. | Abnormal increase in sympathetic nerve sprouting was responsible for the ventricular arrhythmogenesis after myocardial infarction. This study investigated whether the norepinephrine transporter inhibitor, desipramine, can modulate sympathetic remodeling and ventricular fibrillation threshold (VFT) after myocardial isch... |
13,664 | Metastasis to the right stellate ganglion and vagal nerve: pathological alterations causing sudden death. A case report. | Sudden death in a 66-year-old woman with squamous cell carcinoma of the oral cavity and exclusive metastatic involvement of the right stellate ganglion and right nerve vagus is reported. The patient also suffered from paroxysmal atrial fibrillation treated with quinidine. An autopsy showed exclusive metastases to the r... |
13,665 | Thromboembolism and antithrombotic therapy for heart failure in sinus rhythm: an executive summary of a joint consensus document from the ESC Heart Failure Association and the ESC Working Group on Thrombosis. | Chronic heart failure (HF) with either reduced or preserved left ventricular (LV) ejection fraction is common and remains an extremely serious disorder with a high mortality and morbidity. Many complications related to heart failure can be related to thrombosis. Epidemiological and pathophysiological data also link HF ... |
13,666 | Lone atrial fibrillation in the young - perhaps not so "lone"? | To determine if pediatric patients with a history of lone atrial fibrillation (AF) have other forms of supraventricular tachycardia (SVT) that may potentially trigger AF.</AbstractText>A multicenter review of patients with lone AF who underwent electrophysiology (EP) study from 2006-2011 was performed.</AbstractText>ag... |
13,667 | [Atrial fibrillation after coronary artery bypass surgery: possibilities of prevention]. | Atrial fibrillation occurs as a frequent complication after cardiac interventions. It can be found in 5% of all surgical patients, and it is far more common in cardiac (10% - 65% of patients) than in non-cardiac procedures. In a number of patients it remains asymptomatic, but may be accompanied by very severe symptoms ... |
13,668 | The risk stratification in atrial fibrillation. | Atrial fibrillation (AF) is the most common rhythm disorder and represents a major public health problem because it carries an increased risk of arterial thromboembolism and ischemic stroke. Because the absolute benefit of antithrombotic therapy depends on the underlying risk of stroke, an accurate stratification of pa... |
13,669 | Relation Between RR Intervals and Early Diastolic Mitral Annular Velocities in Atrial Fibrillation. | Irregular RR intervals in atrial fibrillation (AF) make beat-to-beat changes in left ventricular (LV) systolic performance. Early diastolic mitral annular velocity (E') is one of the well-established parameters for evaluating LV diastolic function. The relation between RR intervals and E's is unknown. The aim of this s... |
13,670 | Spatial gradients in action potential duration created by regional magnetofection of hERG are a substrate for wavebreak and turbulent propagation in cardiomyocyte monolayers. | Spatial dispersion of action potential duration (APD) is a substrate for the maintenance of cardiac fibrillation, but the mechanisms are poorly understood. We investigated the role played by spatial APD dispersion in fibrillatory dynamics. We used an in vitro model in which spatial gradients in the expression of ether-... |
13,671 | Conduction recovery after electrical isolation of superior vena cava--prevalence and electrophysiological properties. | Superior vena cava (SVC) is an infrequent yet an important source of atrial fibrillation (AF). The data on SVC reconnection are limited.</AbstractText>Following pulmonary vein (PV) antrum isolation for AF, SVC isolation was systemically performed under angiographic and mapping guidance using 4-mm non-irrigated tip cath... |
13,672 | Comparison of autonomic J-wave modulation in patients with idiopathic ventricular fibrillation and control subjects. | Although J-waves are seen in both patients with idiopathic ventricular fibrillation (IVF) and the general population, their genesis remains unclear. To assess the relationship between J-waves and autonomic tone we investigated the circadian variation of J-waves in individuals with and without IVF.</AbstractText>In stud... |
13,673 | The best timing for defibrillation in shockable cardiac arrest. | High quality cardiopulmonary resuscitation (CPR, i.e. chest compressions and ventilations) and prompt defibrillation when appropriate (i.e. in ventricular fibrillation and pulseless ventricular tachycardia, VF/VT) are currently the best early treatment for cardiac arrest (CA). In cases of prolonged CA due to shockable ... |
13,674 | Characterization of early repolarization during ajmaline provocation and exercise tolerance testing. | Early repolarization (ER) in the inferior electrocardiogram leads is associated with idiopathic ventricular fibrillation, but the majority of subjects with ER have a benign prognosis. At present, there are no risk stratifiers for asymptomatic ER.</AbstractText>To examine the response to ajmaline provocation and exercis... |
13,675 | Prolonged burst as a new method for cardioverter-defibrillator testing. | To find out whether it is possible to anaesthetize patients safely without analgesia and sedation, using burst pacing prolonged until the patient becomes unconscious.</AbstractText>One hundred and four patients undergoing implantation or reimplantation of a cardioverter-defibrillator were included. Patients randomized ... |
13,676 | Temporary epicardial left ventricular and biventricular pacing improves cardiac output after cardiopulmonary bypass. | To evaluate, with different pacing modes, acute changes in left ventricular systolic function, obtained by continuous cardiac output thermodilution in various subsets of patients undergoing cardiopulmonary bypass surgery. Increments of mean arterial pressure and cardiac output were considered the end point.</AbstractTe... |
13,677 | Ventricular tachyarrhythmias in rats with acute myocardial infarction involves activation of small-conductance Ca2+-activated K+ channels. | In vitro experiments have shown that the upregulation of small-conductance Ca(2+)-activated K(+) (SK) channels in ventricular epicardial myocytes is responsible for spontaneous ventricular fibrillation (VF) in failing ventricles. However, the role of SK channels in regulating VF has not yet been described in in vivo ac... |
13,678 | Thromboprophylaxis of elderly patients with AF in the UK: an analysis using the General Practice Research Database (GPRD) 2000-2009. | To assess use of thromboprophylaxis in UK general practise among patients with atrial fibrillation (AF); to investigate whether elderly patients are less likely to receive anticoagulation therapy than younger patients.</AbstractText>Retrospective cohort study</AbstractText>UK General Practice Research Database (GPRD) P... |
13,679 | Reduced in-hospital survival rates of out-of-hospital cardiac arrest victims with obstructive pulmonary disease. | Out-of-hospital cardiac arrest (OHCA) due to sustained ventricular tachycardia/fibrillation (VT/VF) is common and often lethal. Patient's co-morbidities may determine survival after OHCA, and be instrumental in post-resuscitation care, but are poorly studied. We aimed to study whether patients with obstructive pulmonar... |
13,680 | Effect of defibrillation threshold testing on heart failure hospitalization or death in the Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy (MADIT-CRT). | Defibrillation threshold (DFT) testing is commonly practiced at the time of implantable cardioverter-defibrillator (ICD) implant. The clinical consequence of ICD shocks delivered during DFT testing is unknown.</AbstractText>The purpose of this study was to determine the impact of ICD shocks and ICD shock energy level d... |
13,681 | Estimated glomerular filtration rate and proteinuria are associated with persistent form of atrial fibrillation: analysis in Japanese patients. | Several reports have identified that decline in renal function and presence of proteinuria are closely associated with incidence of atrial fibrillation (AF). However, it is still unclear whether these kidney-related markers are associated with the progression of AF from paroxysmal to persistent form.</AbstractText>Amon... |
13,682 | Effect of isoprenaline chronic stimulation on APD restitution and ventricular arrhythmogenesis. | Isoprenaline (ISO) acts through β-adrenergic receptors to increase the intracellular Ca(2+), which has effects on action potential duration (APD) restitution and arrhythmogenesis. Thus, we investigated the effect of chronic stimulation with isoprenaline on APD restitution and ventricular tachyarrhythmias (VA) in ... |
13,683 | The effects of a newly developed miniaturized mechanical chest compressor on outcomes of cardiopulmonary resuscitation in a porcine model*. | When the duration of cardiac arrest is prolonged, reperfusion of the vital organs by effective chest compression is the most important intervention for successful resuscitation. We investigated the effects of a newly developed miniaturized chest compressor on the outcomes of cardiopulmonary resuscitation.</AbstractText... |
13,684 | Single-chamber ICD, single-zone therapy in primary and secondary prevention patients: the simpler the better? | It is now well established that implantable cardioverter defibrillator (ICD) implantation reduces mortality in patients at increased risk of sudden cardiac death. However, the best programming parameters remain controversial. Our traditional policy has followed a simple approach in the vast majority of patients. In acc... |
13,685 | Commotio cordis, therapeutic hypothermia, and evacuation from a United States military base in Iraq. | Therapeutic hypothermia (TH) has been demonstrated to improve clinical outcomes after out-of-hospital ventricular fibrillation (VF) cardiac arrest. It remains unclear if TH can be safely and effectively used in the setting of traumatic arrest. Furthermore, the use of TH methods in the pre-hospital and transport environ... |
13,686 | Clinical characteristics and outcomes of dilated phase of hypertrophic cardiomyopathy: report from the registry data in Japan. | A subset of patients with hypertrophic cardiomyopathy (HCM) has been reported to progress into dilated-HCM (D-HCM), characterized by left ventricular (LV) systolic dysfunction and cavity dilatation, resembling idiopathic dilated cardiomyopathy (DCM). We compared the characteristics, treatments, and outcomes in patients... |
13,687 | Permanent pacing in patients with Chagas' disease. | Chagas' disease is an endemic disease in most Latin American countries. The cardiomyopathy associated with this condition often requires permanent pacing due to bradycardia. The aim of this study was to compare the indications for pacemaker implantation, intraoperative measurements, and long-term follow-up of patients ... |
13,688 | Current role of atrioventricular junction (AVJ) ablation. | Atrioventricular junction ablation with permanent pacemaker insertion is a highly effective treatment approach in patients with atrial fibrillation that is resistant to other treatment modalities, especially in the elderly or those with severe comorbidities. This effect likely reflects reversal of rapid ventricular rat... |
13,689 | Use of stored implanted cardiac defibrillator electrograms in catheter ablation of ventricular fibrillation. | Ventricular fibrillation (VF) can be abolished by targeting triggering ventricular ectopy, most often originating in the Purkinje network or right ventricular outflow tract (RVOT). This strategy relies upon the induction of premature ventricular complex (PVC) and/or VF. We sought to evaluate a VF ablation strategy that... |
13,690 | [Takotsubo cardiomyopathy]. | Takotsubo cardiomyopathy or "heart broken syndrome" or transient apical ballooning syndrome is an increasingly reported syndrome characterized by the fact that most patients are women aged over 65 years. The most common electrocardiographic changes are ST-segment elevation and negative T waves in precordial leads. Symp... |
13,691 | Ventricular fibrillation coinciding with phentermine initiation. | A 70-year-old woman developed ventricular fibrillation subsequent to initiation of phentermine therapy. She was hospitalised and experienced recurrent ventricular fibrillation. During cardiac catheterisation, she was found to have a right coronary artery vasospasm, which resolved with intravenous nitroglycerin. Her phe... |
13,692 | [Correlation between mitral regurgitation grading and left ventricular ejection fraction in elderly patients: a follow-up study]. | To analyze the correlation between mitral regurgitation grading and left ventricular ejection fraction in elderly patients (>60 years of age) in a 2-year follow-up.</AbstractText>A total of 455 patients with the diagnosis of at least mild mitral regurgitation by echocardiography were divided into ischemic mitral reg... |
13,693 | Relationship between intrathoracic pressure and hemodynamics during cardiopulmonary resuscitation in a porcine model of prolonged cardiac arrest. | The influences of intrathoracic pressure (ITP) to hemodynamic and respiratory parameters during cardiopulmonary resuscitation (CPR) are confusing. In this research, we investigated the phasic changes of ITP during CPR and reveal the relationships among the hemodynamics, respiratory parameters, and ITP.</AbstractText>Af... |
13,694 | Aortic stenosis and mitral regurgitation as predictors of atrial fibrillation during 11 years of follow-up. | There is limited information about any association between the onset of atrial fibrillation (AF) and the presence of valvular disease.</AbstractText>We retrospectively examined 940 patients in sinus rhythm, examined by echocardiography in 1996. During 11 years of follow-up, we assessed the incidence of AF and outcome d... |
13,695 | A Comparison of Selenium Concentrations between Congestive Heart Failure Patients and Healthy Volunteers. | Selenium (Se) is an essential trace element mainly obtained from seafood, meat, and cereals. Se deficiency has been identified as a major contributing factor in the pathogenesis of certain congestive heart failure (CHF) syndromes. Since there is controversy over the prevalence of Se deficiency among patient with CHF, t... |
13,696 | Internet-based device-assisted remote monitoring of cardiovascular implantable electronic devices: an evidence-based analysis. | The objective of this Medical Advisory Secretariat (MAS) report was to conduct a systematic review of the available published evidence on the safety, effectiveness, and cost-effectiveness of Internet-based device-assisted remote monitoring systems (RMSs) for therapeutic cardiac implantable electronic devices (CIEDs) su... |
13,697 | Relationship between left ventricular longitudinal deformation and clinical heart failure during admission for acute myocardial infarction: a two-dimensional speckle-tracking study. | Heart failure (HF) complicating acute myocardial infarction (MI) is an ominous prognostic sign frequently caused by left ventricular (LV) systolic dysfunction. However, many patients develop HF despite preserved LV ejection fractions. The aim of this study was to test the hypothesis that LV longitudinal function is a s... |
13,698 | Burden of atrial fibrillation and poor rate control detected by continuous monitoring and the risk for heart failure hospitalization. | Atrial fibrillation (AF) on electrocardiogram has been identified as a risk factor for hospitalizations in patients with heart failure (HF). We investigated whether continuous AF monitoring can identify when patients with HF are at risk for hospitalization.</AbstractText>In this retrospective analysis of data from 4 st... |
13,699 | Regionalization of post-cardiac arrest care: implementation of a cardiac resuscitation center. | Guidelines recommend standardized treatment of post-cardiac arrest patients to improve outcomes. However, the infrastructure, resources, and personnel required to meet the complex needs of cardiac arrest victims remain a barrier to care. Given that regionalization of time-dependent high-acuity illness is an emerging pa... |
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