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300 | Predictive significance for sudden death of microvolt-level T wave alternans in New York Heart Association class II congestive heart failure patients: a prospective study. | Sudden cardiac death (SDC) is responsible for approximately 60-70% of deaths in New York Heart Association (NYHA) class II congestive heart failure (CHF) patients. Recently, microvolt-level T wave alternans has been proposed as a new noninvasive tool to identify CHF patients at risk for SCD and ventricular tachycardia/... |
301 | Heart failure after myocardial revascularization: risk markers. | We investigated the prognostic weight of several risk factors for heart failure in patients undergoing CABG. We followed 351 consecutive patients for 18+/-12 months after surgery to assess clinical outcome, presence and degree of heart failure. The risk of developing heart failure >class 2 at 1 year was investigated... |
302 | Diagnosis of unexplained cardiac arrest: role of adrenaline and procainamide infusion. | Cardiac arrest with preserved left ventricular function may be caused by uncommon genetic conditions. Although these may be evident on the ECG, long-term monitoring or provocative testing is often necessary to unmask latent primary electrical disease.</AbstractText>Patients with unexplained cardiac arrest and no eviden... |
303 | An unusual clinical presentation resembling superior vena cava syndrome post heart surgery. | An unusual sequence of post operative events heralded by hemodynamic deterioration followed by dyspnea and rapidly progressive dilatation of superficial neck and facial veins, resembling a superior vena cava syndrome, two days post surgical resection of filamentous aortic valve masses, closure of a patent foramen ovale... |
304 | Radiofrequency catheter septal ablation for hypertrophic obstructive cardiomyopathy in childhood. | Two patients, a 5 year old boy with progressive hypertrophic obstructive cardiomyopathy and increasing symptoms despite appropriate pharmacologic therapy and an 11 year old girl with symptoms of tiredness and peak instantaneous LVOT gradient of 80 and 90 mmHg respectively were considered for radiofrequency catheter sep... |
305 | [Safety and feasibility of dobutamine-atropine stress echocardiography in octogenarian patients]. | To assess the feasibility and safety of dobutamine-atropine stress echocardiography (DASE) in octogenarians.</AbstractText>We evaluated 5,467 DASE which were distributed in two groups: group I (GI) with 203 DASE performed in octogenarians, and group II (GII), the control group, with 5,264 DASE. The mean age of GI and G... |
306 | [Calcium channel antagonists and arrhythmias]. | Ca channel antagonists (CCA) including verapamil and diltiazem work as antiarrhythmic drugs. Because CCA suppresses conduction through atrio-ventricular (AV) node, it is effective on both AV reciprocating tachycardia (AVRT) and AV nodal reentrant tachycardia (AVNRT). It is also useful to reduce ventricular response dur... |
307 | Arrhythmic complications of acute coronary syndromes. | Cardiac arrhythmias routinely manifest during or following an acute coronary syndrome (ACS). Although the incidence of arrhythmia is directly related to the type of ACS the patient is experiencing, the clinician needs to be cautious with all patients in these categories. As an example, nearly 90% of patients who experi... |
308 | Rapid cardiac ultrasound of inpatients suffering PEA arrest performed by nonexpert sonographers. | Cardiac arrest presenting as pulseless electrical activity (PEA) currently has a very low survival rate. Many of the conditions underlying PEA (cardiac tamponade, hypovolemia, and pulmonary embolus) are associated with specific cardiac ultrasound findings. The aim of this study was to evaluate a rapid cardiac ultrasoun... |
309 | Incidence of EMS-treated out-of-hospital cardiac arrest in Europe. | The potential impact of efforts in Europe to improve survival from out-of-hospital cardiac arrest is unclear, in part, because estimates of incidence and survival are uncertain. The aim of the investigation was to determine a representative European incidence and survival from cardiac arrest in all-rhythms and in ventr... |
310 | Pediatric defibrillation doses often fail to terminate prolonged out-of-hospital ventricular fibrillation in children. | The recommended dose for pediatric defibrillation is 2 J/kg, based on animal studies of brief duration ventricular fibrillation (VF) and a single pediatric study of short duration in-hospital VF. In a piglet model of out-of-hospital (prolonged) cardiac arrest, this recommended dose was usually ineffective at terminatin... |
311 | Enlarged left atrial volume in hypertrophic cardiomyopathy: a marker for disease severity. | Patients with hypertrophic cardiomyopathy and left atrial (LA) enlargement have increased morbidity and mortality. We analyzed the clinical and echocardiographic factors related to LA enlargement, particularly the degree of left ventricular (LV) hypertrophy and diastolic function.</AbstractText>A total of 104 patients ... |
312 | Gender-related differences in rhythm control treatment in persistent atrial fibrillation: data of the Rate Control Versus Electrical Cardioversion (RACE) study. | This study sought to compare whether gender affects the outcome of rate versus rhythm control treatment in patients with persistent atrial fibrillation (AF).</AbstractText>Large trials have shown that rate control is an acceptable alternative to rhythm control. However, the effects of treatment may differ between male ... |
313 | Malignant entity of idiopathic ventricular fibrillation and polymorphic ventricular tachycardia initiated by premature extrasystoles originating from the right ventricular outflow tract. | The aim of this study was to assess the clinical characteristics and the efficacy of radiofrequency catheter ablation (RFCA) for idiopathic ventricular fibrillation (VF) and/or polymorphic ventricular tachycardia initiated by ventricular extrasystoles originating from the right ventricular outflow tract (RVOT).</Abstra... |
314 | Prognostic value of the QRS duration in patients with heart failure: a subgroup analysis from 24 centers of Val-HeFT. | This study investigated whether QRS duration (QRS D) is a prognostic indicator in patients with heart failure (New York Heart Association [NYHA] classes II-IV).</AbstractText>This subgroup analysis included 248 patients with heart failure recruited in the German centers of the Valsartan Heart Failure Trial (Val-HeFT). ... |
315 | Silent strokes in patients with heart failure. | The prevalence of asymptomatic strokes detected by brain imaging in a large cohort of patients with congestive heart failure (CHF) and reduced ejection fraction (EF) is unknown.</AbstractText>The present study was conducted to assess the prevalence of cerebrovascular accidents (CVA) diagnosed by routine brain imaging i... |
316 | Predictors of arrhythmic events during second day monitoring in patients with normal first day Holter recordings. | The diagnostic yield of Holter monitoring in patients with syncope is variably reported to be between 6%-20%. This study was done to define predictors of arrhythmic events during the second day of Holter monitoring in patients whose first day Holter recording was normal.</AbstractText>Two serial 24-hour Holter recordin... |
317 | Pathophysiologic targets in the early phase of acute heart failure syndromes. | An episode of acute heart failure syndromes (AHFS) can be defined as a rapid or gradual onset of signs and symptoms of heart failure (HF) in hospital admission and can arise from a variety of pathophysiologic mechanisms. This article reviews our current understanding of the pathophysiology of AHFS in order to identify ... |
318 | Expanding cardiac resynchronization for systolic heart failure to patients with mechanical dyssynchrony and atrial fibrillation. | Despite progress in the management of heart failure (HF) using pharmacotherapy, the mortality and morbidity associated with this condition remain unacceptably high. Cardiac resynchronization therapy (CRT), a left-sided pacing therapy for drug-refractory and highly symptomatic HF patients with ventricular conduction del... |
319 | Emergency treatment with nifekalant, a novel class III anti-arrhythmic agent, for life-threatening refractory ventricular tachyarrhythmias: post-marketing special investigation. | Because class I anti-arrhythmic drugs sometimes suppress cardiac function caused by their negative inotropic effects, they are not adequate for use in patients with severe heart failure, even as emergency treatment for life-threatening ventricular tachyarrhythmias (ventricular tachycardia (VT)/ventricular fibrillation ... |
320 | Longitudinal study of acute myocardial infarction in the southeast Osaka district from 1988 to 2002. | Data on clinical characteristics, long-term mortality rates, and factors influencing outcome of acute myocardial infarction (AMI) based on an unselected cohort in the percutaneous coronary intervention (PCI) era are still limited in Japan.</AbstractText>In the present study 415 consecutive patients with AMI who were ad... |
321 | Incidence of ventricular fibrillation in patients with out-of-hospital cardiac arrest in Japan: survey of survivors after out-of-hospital cardiac arrest in Kanto area (SOS-KANTO). | Although there is a close connection between emergency medical services (EMS) system and the outcome of out-of-hospital ventricular fibrillation (VF), few data are available regarding the situation in Japan.</AbstractText>A prospective multicenter study of out-of-hospital cardiac arrest was conducted according to the U... |
322 | Interrelationships between the autonomic nervous system and atrial fibrillation. | Mechanisms responsible for atrial fibrillation are not completely understood but the autonomic nervous system is a potentially potent modulator of the initiation, maintenance, termination and ventricular rate determination of atrial fibrillation. Complex interactions exist between the parasympathetic and sympathetic ne... |
323 | Mechanisms of atrial fibrillation: lessons from animal models. | Studies in animal models have provided extremely important insights about atrial fibrillation (AF). The classic mechanisms that still form the framework for our understanding of AF (focal activity, single-circuit or "mother wave" reentry, and multiple circuit reentry) were established based on animal studies almost 100... |
324 | [A comparative study of the effects of antiarrhythmic class III drugs cardiocyclide and sotalol on the atrioventricular fibrillation caused by vagus nerve excitation in narcotized dogs]. | The new class III antiarrhythmic agent cardiocyclide effectively prevents the atrioventricular fibrillations caused by the vagus nerve excitation in narcotized dogs. The electrophysiological effect of cardiocyclide was studied by method of programmed electric stimulation of myocardium on the background of excitation of... |
325 | Do different atrial flutter types carry the same thromboembolic risk? | Thromboembolic risk of atrial flutter (AFl) types has not been elucidated sufficiently in previous reports. The authors classified the patients according to surface electrocardiogram and electrophysiologic characteristics as those with typical AFl (37 patients, 78.4% male, mean age 59.8 +/-9.5 years) and atypical AFl (... |
326 | Modification of ventricular fibrillation activation patterns induced by local stretching. | We hypothesize that local modifications in electrophysiological properties, when confined to zones of limited extent, induce few changes in the global activation process during ventricular fibrillation (VF). To test this hypothesis, we produced local electrophysiological modifications by stretching a circumscribed zone... |
327 | Determinants of recurrent ventricular arrhythmia or death in 300 consecutive patients with ischemic heart disease who experienced aborted sudden death: data from the Leiden out-of-hospital cardiac arrest study. | Evaluation of the relation between clinical characteristics and incidence of recurrent ventricular arrhythmias (VAs) or death during long-term follow-up in a cohort of 300 consecutive ischemic heart disease (IHD) patients who had survived an episode of sudden cardiac arrest (SCA).</AbstractText>Survivors of life-threat... |
328 | Pronounced unexplained preoperative tachycardia heralding serious cardiac events: a series of three cases. | Pronounced, unexplained preoperative tachycardia can be a formidable challenge for the anesthesiologist. Whereas the relationship between persistent intraoperative tachycardia and perioperative morbidity is indisputable, there is a lack of available data on unexplained preoperative tachycardia. The main objective of th... |
329 | Brugada syndrome, manifested by propafenone induced ST segment elevation. | We report a case of a 43 year old man who was diagnosed with Brugada syndrome after propafenone administration for chemical cardioversion of new onset atrial fibrillation. Brugada syndrome has been described in the medical literature and is thought to be responsible for the majority of sudden cardiac deaths in patients... |
330 | Intrathecal clonidine reduces the incidence of ischemia-provoked ventricular arrhythmias in a canine postinfarction heart failure model. | Intrathecal clonidine (ITC) is used clinically to manage neuropathic pain but frequently causes hypotension and bradycardia due to centrally mediated sympatholytic effects.</AbstractText>The purpose of this study was to evaluate the cardiac electrophysiologic effects of thoracic ITC and its effects on ischemia-provoked... |
331 | Internal defibrillation with minimal skeletal muscle activation: a new paradigm toward painless defibrillation. | Shock-induced pain produces substantial morbidity in recipients of implantable cardioverter-defibrillators (ICDs). This pain likely derives from activation of skeletal muscle and associated nerves in the chest and abdomen. In an effort to develop a painless defibrillation system, we designed an electrode arrangement th... |
332 | Spectrum and prevalence of cardiac ryanodine receptor (RyR2) mutations in a cohort of unrelated patients referred explicitly for long QT syndrome genetic testing. | Mutations in the RyR2-encoded cardiac ryanodine receptor/calcium release channel cause type 1 catecholaminergic polymorphic ventricular tachycardia (CPVT1).</AbstractText>Because CPVT and concealed long QT syndrome (LQTS) phenotypically mimic one other, we sought to determine the spectrum and prevalence of RyR2 mutatio... |
333 | Effect of cardiac resynchronization therapy on the incidence of ventricular arrhythmias in patients with an implantable cardioverter-defibrillator. | Cardiac resynchronization therapy (CRT) reduces mortality in selected patients with heart failure. However, this result may not be entirely related to the beneficial hemodynamic effects of CRT.</AbstractText>The purpose of this study was to assess retrospectively the effect of CRT on the incidence of appropriate therap... |
334 | Pacemaker utilization during permanent atrial fibrillation in patients who received pacemaker implantation for sinus node dysfunction. | Patients who have pacemakers and sinus node dysfunction frequently have atrial fibrillation (AF). The need for continued pacemaker therapy after conversion to permanent AF remains uncertain. This study showed that, among 174 patients who received pacemaker implantation for sinus node dysfunction, 38% (n = 62) had the m... |
335 | Rate versus rhythm control in the management of patients with atrial fibrillation. | The management of patients with atrial fibrillation involves three main areas: anticoagulation, rate control and rhythm control. Importantly, these are not mutually exclusive of each other. Anticoagulation is necessary for patients who are at a high risk of stroke; for example, those who are older than 75 years, or tho... |
336 | Stabilisation of calstabin2--a new approach in sudden cardiac death. | Calstablin2 stabilises the ryanodine receptor (RyR2), preventing aberrant activation of the channels during the resting phase of the cardiac muscle. Loss of this stabilisation may be associated with cardiac arrhythmias, the sudden death occasionally observed in people with structurally normal hearts, as well as the atr... |
337 | Comparison of defibrillation efficacy using implantable cardioverter-defibrillator with single- or dual-coil defibrillation leads and active can. | The reduction of defibrillation threshold (DFT) in patients treated with an implantable cardioverter-defibrillator increases patients' safety and prolongs ICD battery life.</AbstractText>To evaluate the possibility of reducing the defibrillation threshold in ICDs with an active can and an additional atrial defibrillati... |
338 | Circulatory arrest as a model for studies of global ischemic injury and neuroprotection. | Despite many programs aimed at better immediate care of cardiac arrest victims, the subsequent mortality rate is high, with myocardial and central nervous system (CNS) injuries as the most common causes of death. Preclinical research is badly needed to produce a sound base for future clinical trials and possible improv... |
339 | Latent arterial hypertension in apparently lone atrial fibrillation. | Longitudinal studies on lone AF are rare and the incidence of hypertension in this population unknown. This study aimed at investigating the incidence of arterial hypertension in patients with apparently lone atrial fibrillation (AF).</AbstractText>Out of 292 consecutive patients presented with permanent or paroxysmal ... |
340 | Hypothermia during reperfusion does not reduce myocardial infarct size in pigs. | We previously described a method for regional myocardial cooling that reaches the target temperature within 4 min. The present study evaluated whether this method for regional myocardial cooling during reperfusion reduces myocardial infarct size (IS) in 75-kg pigs. Myocardial infarction was induced by inflation of an a... |
341 | Atrial fibrillation and heart failure comorbidity. | Atrial fibrillation and heart failure have in common that they mainly occur in older patients and the patients have similar underlying heart diseases. The prevalence of atrial fibrillation in heart failure patients varies from 10% to 30%. There are conflicting data whether the presence of atrial fibrillation is an inde... |
342 | Pharmacological treatment of chronic heart failure according to the 2005 guidelines of the European Society of Cardiology. | Recently, the updated guidelines for the diagnosis and treatment of chronic heart failure were published. This review focuses on the pharmacological treatment. Basically, all patients with chronic heart failure and left ventricular systolic dysfunction should be treated with diuretics, ACE-inhibitors and beta-blockers,... |
343 | Efficacy and safety of ibutilide for cardioversion of atrial flutter and fibrillation in patients receiving amiodarone or propafenone. | The effectiveness and safety of ibutilide (IB) use in patients receiving amiodarone or propafenone for atrial flutter (AFL) and atrial fibrillation (AF) were compared to IB alone.</AbstractText>In 104 consecutive patients with AF (65%) or AFL (35%), receiving amiodarone (n = 46), propafenone (n = 30), or no specific an... |
344 | Significance of inducible ventricular flutter-fibrillation after myocardial infarction. | The purpose of this study was to determine the factors associated with the induction of ventricular flutter/fibrillation (VFl/VF)and its prognostic significance in post-myocardial infarction.</AbstractText>Programmed ventricular stimulation was performed after myocardial infarction (MI) for syncope (n = 232) or systema... |
345 | Multiple cellular electrophysiological effects of a novel antiarrhythmic furoquinoline derivative HA-7 [N-benzyl-7-methoxy-2,3,4,9-tetrahydrofuro[2,3-b]quinoline-3,4-dione] in guinea pig cardiac preparations. | We studied the electrophysiological and antiarrhythmic actions of HA-7 [N-benzyl-7-methoxy-2,3,4,9-tetrahydrofuro[2,3-b]quinoline-3,4-dione], a furoquinoline alkaloid derivative, in guinea pig heart preparations. In the perfused whole heart model, HA-7 caused a prolongation in the basic cycle length, ventricular repola... |
346 | Role of microscopic tissue structure in shock-induced activation assessed by optical mapping in myocyte cultures. | Termination of ventricular fibrillation by electric shocks is believed to be due to the direct activation of large tissue mass that may be caused by microscopic virtual electrodes formed at discontinuities in tissue structure. Here, microscopic shock-induced activation was measured optically in myocyte cultures; spatia... |
347 | Atrial fibrillation in patients with a dual defibrillator: characteristics of spontaneous and induced episodes and effect of ventricular tachyarrhythmia induction. | The pattern of FF intervals during atrial fibrillation (AF) has been analyzed in induced and spontaneous AF episodes, after the induction of ventricular fibrillation (VF) and after atrial shock, in order to suggest practical considerations for AF management in patients implanted with antitachycardia devices.</AbstractT... |
348 | Functional roles of Cav1.3(alpha1D) calcium channels in atria: insights gained from gene-targeted null mutant mice. | Previous data suggest that L-type Ca2+ channels containing the Cav1.3(alpha(1D)) subunit are expressed mainly in neurons and neuroendocrine cells, whereas those containing the Cav1.2(alpha1C) subunit are found in the brain, vascular smooth muscle, and cardiac tissue. However, our previous report as well as others have ... |
349 | Coronary occlusion and reperfusion promote early afterdepolarizations and ventricular tachycardia in a canine tissue model of type 3 long QT syndrome. | Although long QT syndrome (LQTS) and coronary occlusion-reperfusion (O/R) are arrhythmogenic, they affect ventricular action potential duration (APD) differently. In contrast to the prolonged APD in LQTS, ischemia abbreviates APD after a transient prolongation. Thus we hypothesized that the dynamic interactive effects ... |
350 | Ischemic ventricular arrhythmias during heart failure: a canine model to replicate clinical events. | Development of experimental animal models has played an invaluable role in understanding the mechanisms of ventricular arrhythmias.</AbstractText>The purpose of this study was to evaluate a new canine model of myocardial infarction (MI), heart failure, and ischemic ventricular arrhythmias in an attempt to replicate cli... |
351 | Potential proarrhythmic effect of biventricular pacing: fact or myth? | Hemodynamic improvement from biventricular pacing is well documented; however, its electrophysiologic effects have not been systematically studied. Sporadic case reports suggest a proarrhythmic effect of biventricular pacing resulting primarily in polymorphic ventricular tachycardia/ventricular fibrillation (VT/VF).</A... |
352 | Impedance monitoring during catheter ablation of atrial fibrillation. | Delivery of radiofrequency energy in proximity of a pulmonary vein can cause vein stenosis. A sudden decrease in impedance as the catheter is moved from the vein into the left atrium (LA) has been used to define the pulmonary vein-LA transition during ablation procedures.</AbstractText>The purpose of this study was to ... |
353 | Cardiac arrest in a 17-year-old boy--a case report. | Cardiac arrest (CA) refers to abrupt cessation of cardiac pump function. Most sudden deaths in young people are of cardiac origin, at the same time most patients have unrecognised prior heart disease. We report a case of a 17-year-old boy with cardiac arrest induced by ventricular fibrillation. Sinus rhythm was restore... |
354 | [Causes of atrial fibrillation early after coronary artery bypass grafting]. | The aim of the study was to define the frequency of atrial fibrillation early after coronary artery bypass grafting (CABG) and clinical risk factors for the development of atrial fibrillation in the post-operative course. The study population consisted of 1578 patients (1283 men and 295 women ranging in age from 25 to ... |
355 | High-dose streptokinase in the treatment of acute massive pulmonary embolism complicated with cardiogenic shock, respiratory arrest and ventricular fibrillation. | Despite advances in prophylaxis, diagnostic modalities, and therapeutic options, pulmonary embolism remains a commonly undiagnosed entity with lethal outcome. Clinically, pulmonary embolism ranges from massive thromboembolism with cardiogenic shock to asymptomatic, microebolism with anatomically small emboli without he... |
356 | [Arrhythmogenic right ventricular cardiomyopathy]. | Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a primary myocardial disorder that is characterized by localized or diffuse atrophy of predominantly right ventricular myocardium with subsequent replacement by fatty and fibrous tissue. Arrhythmias of right ventricular origin are the main clinical manifestation... |
357 | Prevalence and clinical significance of cardiac arrhythmia in Anderson-Fabry disease. | Anderson-Fabry disease (AFD) is an X-linked lysosomal storage disorder caused by a deficiency in the enzyme alpha-galactosidase A. More than 60% of patients with AFD have evidence for cardiac involvement; the prevalence and clinical significance of arrhythmia in AFD are unknown. Seventy-eight consecutive patients (mean... |
358 | Outcome of ventricular fibrillation developing during percutaneous coronary interventions in 19,497 patients without cardiogenic shock. | Ventricular fibrillation (VF) developing out of hospital or even in hospital has a reported prognosis for survival that is <50%. We examined the prognosis for VF in 19,497 patients undergoing percutaneous coronary intervention and identified 164 who had VF (0.84%). The time to defibrillation was <1 minute and was... |
359 | Isolated heart function during ischemia and reperfusion in sucrose-fed rats: effect of insulin infusion. | In myocardial damage due to ischemia-reperfusion, the administration of insulin together with glucose and potassium may be protective, although in some patients and animal models, it is ineffective. In a rat model (HTG) with characteristics of the metabolic syndrome, induced by sucrose feeding, ischemia-reperfusion of ... |
360 | Global endocardial electrical restitution in human right and left ventricles determined by noncontact mapping. | This study was aimed at evaluating global characteristics of electrical restitution in the human ventricle using noncontact mapping.</AbstractText>Steep action potential restitution (slope >1) and conduction velocity (CV) restitution have been linked with propensity to ventricular fibrillation, but clinical measurem... |
361 | Pharmacologic control of ventricular rate: American College of Chest Physicians guidelines for the prevention and management of postoperative atrial fibrillation after cardiac surgery. | While there is a deficiency in the number of randomized control studies dealing with the pharmacologic control of the ventricular response to atrial fibrillation (AF) or atrial flutter (AFL) after cardiac surgery, evidence-based recommendations are presented from those studies that are available. Because of the hyperad... |
362 | Pharmacologic control of rhythm: American College of Chest Physicians guidelines for the prevention and management of postoperative atrial fibrillation after cardiac surgery. | Of the 128 articles evaluated on the overall topic of atrial fibrillation (AF) after cardiac surgery, only 19 studies dealing with pharmacologic heart rhythm control were relevant for inclusion in this analysis, indicating the relative paucity of evidence-based studies addressing this topic. We found limited data on gu... |
363 | Epidemiology, mechanisms, and risks: American College of Chest Physicians guidelines for the prevention and management of postoperative atrial fibrillation after cardiac surgery. | Atrial fibrillation (AF) is one of the most frequent complications of cardiac surgery, affecting more than one third of patients. The mechanism of this arrhythmia is believed to be reentry. The electrophysiologic substrate may be preexisting or may develop due to heterogeneity of refractoriness after surgery. Multiple ... |
364 | Introduction: American College of Chest Physicians guidelines for the prevention and management of postoperative atrial fibrillation after cardiac surgery. | Atrial fibrillation (AF) and atrial flutter (AFL) are arrhythmias that commonly occur following cardiac surgery. The precipitating events are not always obvious, although predisposing factors including age have been defined. Postoperative AF and AFL add significantly to both the cost and morbidity of cardiac surgery. T... |
365 | A national programme for on-site defibrillation by lay people in selected high risk areas: initial results. | To report on the effectiveness of an initiative to reduce deaths from sudden cardiac arrest occurring in busy public places.</AbstractText>110 such places identified from ambulance service data as high risk sites.</AbstractText>172 members of the public who developed cardiac arrest at these sites between April 2000 and... |
366 | Cardiac resynchronisation therapy in chronic atrial fibrillation: impact on left atrial size and reversal to sinus rhythm. | To evaluate the impact of long term cardiac resynchronisation therapy (CRT) on left atrial and left ventricular (LV) reverse remodelling and reversal to sinus rhythm (SR) in patients with heart failure with atrial fibrillation (AF).</AbstractText>74 consecutive patients (age 68 (8) years; 67 men) with advanced heart fa... |
367 | Treatment of out-of-hospital cardiac arrest with LUCAS, a new device for automatic mechanical compression and active decompression resuscitation. | Lund University Cardiopulmonary Assist System (LUCAS) is a new gas-driven CPR device providing automatic chest compression and active decompression. This is a report of the first 100 consecutive cases treated with LUCAS due to out-of-hospital cardiac arrest (58% asystole, 42% ventricular fibrillation (VF)). Safety aspe... |
368 | [Predictive factors of maintenance of sinus rhythm after direct current (DC) cardioversion of atrial fibrillation/atrial flutter]. | Our aim was to determine the immediate and long-term outcome of direct current (DC) electrical cardioversion in patients with atrial fibrillation or flutter, and to determine factors predicting clinical outcome.</AbstractText>A retrospective one-year follow-up study of 220 patients with atrial fibrillation or flutter u... |
369 | Ventricular fibrillation refractory to ICD therapy. | A 14-year-old boy was admitted for the evaluation of recurrent syncope. His ECG on admission revealed a sinus rhythm with an undetermined QRS axis, T wave inversion at leads V3, V4 and abnormal q at leads I, aVL, V5 and V6. However, no underlying disease could be detected by any morphological examination. Programmed ve... |
370 | Efficacy of nifekalant hydrochloride in the treatment of fatal ventricular arrhythmia in patients with ischemic heart disease. | Ventricular tachycardia (VT), which causes hemodynamic instability, and ventricular fibrillation (VF) sometimes occur in patients with severe underlying cardiovascular disease such as myocardial ischemia or infarction, and are associated with high mortality. This report presents the efficacy of nifekalant hydrochloride... |
371 | Electrophysiological characteristics and catheter ablation in patients with paroxysmal right atrial fibrillation. | Catheter ablation of the right atrial (RA) substrate has had variable efficacy in curing paroxysmal atrial fibrillation (PAF), suggesting that RA substrate ablation can play an important role in the treatment of atrial fibrillation (AF) in some patients. The aim of this study was to investigate the electrophysiological... |
372 | Torsade de pointes in a patient with complex medical and psychiatric conditions receiving low-dose quetiapine. | Describe potential cardiac complications of low-dose quetiapine and other atypical antipsychotic drugs.</AbstractText>We present a case report of a 45-year-old Black woman with multiple medical and psychiatric problems taking low-dose quetiapine.</AbstractText>Coincident with a generalized seizure, the patient develope... |
373 | Denaturing high-performance liquid chromatography screening of the long QT syndrome-related cardiac sodium and potassium channel genes and identification of novel mutations and single nucleotide polymorphisms. | Mutations in cardiac potassium and sodium channel genes are responsible for several hereditary cardiac arrhythmia syndromes. We established a denaturing high-performance liquid chromatography (DHPLC) protocol for rapid mutation screening of these genes, and reported mutations and variations identified by this method. W... |
374 | Statins, ventricular arrhythmias and heart rate variability in patients with implantable cardioverter defibrillators and coronary heart disease. | The aim of this study was to evaluate whether the incidence of ventricular arrhythmias and heart rate variability were influenced by statin treatment and lipid levels in patients treated with an implantable cardioverter defibrillator (ICD). Heart rate variability measurements were performed in 86 patients with coronary... |
375 | Independent evaluation of a defibrillation outcome predictor for out-of-hospital cardiac arrested patients. | We evaluated the ability of a previously derived outcome predictor to discriminate between ECG segments corresponding to return of spontaneous circulation (ROSC) or not in validation data from 136 patients with cardiac arrest. The new data used for validation were totally independent from the predictor derivation data ... |
376 | Reducing no flow times during automated external defibrillation. | There has recently been an increased attention focused on the importance of reducing time without blood flow from chest compressions (no flow time, NFT) during cardiopulmonary resuscitation (CPR). In this study we have analyzed and quantified the NFTs during external automatic defibrillation in 105 cardiac arrest patie... |
377 | Doppler tissue evaluation of intra-atrial and interatrial electromechanical delay and comparison with P-wave dispersion in patients with mitral stenosis. | The aim of our study was to: (1) measure atrial electromechanical delay in patients with mitral stenosis (MS) and in a control group; (2) find the echocardiographic parameters that affect atrial electromechanical delay; and (3) examine the correlation between atrial electromechanical delay and P-wave dispersion (PWD).<... |
378 | Left atrial appendage function analyzed by tissue Doppler imaging in mitral stenosis: effect of afterload reduction after mitral valve commissurotomy. | This study sought to investigate the relative load dependence of left atrial appendage (LAA) tissue Doppler velocities in patients with mitral stenosis after percutaneous mechanical mitral commissurotomy (PMMC).</AbstractText>LAA tissue Doppler velocities were obtained in 34 patients with mitral stenosis (20 with sinus... |
379 | Refinement on single-beat determination of left ventricular systolic function in patients with atrial fibrillation. | Single-beat determination of left ventricular systolic function at a beat with equal subsequent cardiac cycles has been proposed as an accurate method in atrial fibrillation. However, there has still been substantial variability between the values calculated from beats with equal subsequent cycles. Therefore, some refi... |
380 | Risk factors of postoperative atrial fibrillation after cardiac surgery. | Postoperative atrial fibrillation (AF) occurs in up to 50% of cardiac surgery patients and represents the most common postoperative arrhythmic complication. The etiology of AF after open-heart surgery is incompletely understood and its prevention remains suboptimal. Identification of patients vulnerable for postoperati... |
381 | Autologous stem cell transplantation in acute myocardial infarction: The ASTAMI randomized controlled trial. Intracoronary transplantation of autologous mononuclear bone marrow cells, study design and safety aspects. | Intracoronary transplantation of different cell populations has been used in acute myocardial infarction (AMI) with promising results. The primary objective of the Autologous Stem cell Transplantation in Acute Myocardial Infarction (ASTAMI) study is to test whether intracoronary transplantation of autologous mononuclea... |
382 | Anorexia nervosa and ventricular fibrillation.<Pagination><StartPage>629</StartPage><EndPage>632</EndPage><MedlinePgn>629-32</MedlinePgn></Pagination><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Lindblade</LastName><ForeName>Christopher L</ForeName><Initials>CL</Initials><AffiliationInfo><Affiliation>James ... | Atrial fibrillation (AF) is one of the most frequently seen arrhythmia. Optimal strategy of its treatment still remains a serious problem. The goal of the investigation was the evaluation of the efficacy of combined treatment of AF with Cordaron and ACE inhibitor Diroton (lizinopril) (D) in patients with chronic heart ... |
383 | Trends in treated ventricular fibrillation in out-of-hospital cardiac arrest: ischemic compared to non-ischemic heart disease. | The incidence of ventricular fibrillation (VF) out-of-hospital cardiac arrest (OHCA) treated by first responders has declined over the past decade. Since VF OHCA occurs primarily in the setting of severe coronary artery disease, primary and secondary prevention strategies may in part account for the decline. However, s... |
384 | Cardiac arrest in the early stage of cardiosurgical procedure. | Cardiosurgical operations remain one of the most demanding and complicated surgical procedures. Cardiac arrest before extra corporeal circulation (ECC) is one of severe intraoperative complications which can occur in any moment of operation. We have tried to evaluate possible risk factors of intraoperative, pre-ECC car... |
385 | Predictors of quality of life in patients with implantable cardioverter defibrillators. | Few studies have prospectively examined characteristics of implantable cardioverter defibrillator (ICD) patients as predictors of postimplant outcome. In this study the authors considered the association between preimplant psychological characteristics, ICD shocks, and postimplant quality of life at short- and long-ter... |
386 | Mechanisms of ventricular fibrillation in canine models of congestive heart failure and ischemia assessed by in vivo noncontact mapping. | Much of the research performed studying the mechanism of ventricular fibrillation (VF) has been in normal ventricles rather than under a pathological condition predisposing to VF. We hypothesized that different ventricular substrates would alter the mechanism and characteristics of VF.</AbstractText>Three groups of dog... |
387 | Amiodarone prophylaxis reduces major cardiovascular morbidity and length of stay after cardiac surgery: a meta-analysis. | Although evidence supports the prophylactic use of beta-blockade in cardiac surgery, postoperative atrial fibrillation or flutter occurs in 40% to 60% of patients. Trials that assessed whether amiodarone prophylaxis decreases the incidence of postoperative atrial tachyarrhythmias have had mixed results and were not spe... |
388 | Dynamic changes in right ventricular pressures during haemodialysis recorded with an implantable haemodynamic monitor. | Intermittent and chronic volume overload contributes to the development of cardiovascular disease in patients on maintenance haemodialysis (HD). Continuous monitoring of central haemodynamic parameters may provide valuable information to improve volume control, particularly in patients with left ventricular dysfunction... |
389 | [Protection of oxyphenamone on myocardium against ischemia-reperfusion injury in rat heart]. | To study the protective effect of oxyphenamone, a novel inodilator against myocardial ischemia-reperfusion injury.</AbstractText>A model of regional myocardial ischemia-reperfusion injury was established by ligating the left anterior desending coronary artery (LAD) in rat heart 10 min followed by reperfusion 15 min in ... |
390 | Left ventricular functional recovery with percutaneous, transvascular direct myocardial delivery of bone marrow-derived cells. | The potential for cellular cardiomyoplasty to provide functional left ventricular recovery in the chronically injured heart remains unclear.</AbstractText>Yorkshire swine (n = 10; 35-50 kg) had anterolateral myocardial infarction (MI) induced by coil embolization of the left anterior descending artery. Approximately 5 ... |
391 | [Acute hydroxychloroquine poisoning. The danger of rapid or excessive correction of initial hypokalemia]. | Toxic effects of hydroxychloroquine, like chloroquine, include membrane stabilization and hypokalemia, which is correlated with the severity of the overdose. Correction of hypokalemia can expose patients to the risk of ventricular arrhythmia.</AbstractText>A 19-year-old woman who had ingested 6 grams of hydroxychloroqu... |
392 | Spironolactone reduces fibrosis of dilated atria during heart failure in rats with myocardial infarction. | Congestive heart failure (CHF) is associated with severe structural changes of atria, contributing to impaired atrial function and the risk of arrhythmia. This study investigated the effects of CHF treatments on atrial remodelling.</AbstractText>Three months after myocardial infarction (MI), rats were treated for 1 mon... |
393 | Left atrial volume predicts cardiovascular events in patients originally diagnosed with lone atrial fibrillation: three-decade follow-up. | The objectives of this study were to determine the long-term outcome and the predictors of adverse events in patients originally diagnosed with lone atrial fibrillation (AF).</AbstractText>This population-based historical cohort study comprised 46 residents of Olmsted County, MN, USA, with well-documented, clinically d... |
394 | Device-based therapies for atrial fibrillation. | Ablation of the atrioventricular conduction system and pacemaker implantation is the preferred procedure for patients with atrial fibrillation (AF) in whom a rate control strategy has been selected but in whom rate-controlling medications are intolerable or ineffective. Selection of standard right ventricular (RV) paci... |
395 | Mechanisms of ventricular arrhythmias in heart failure. | Congestive heart failure continues to be a leading cause of mortality and morbidity worldwide. In approximately 50% of these patients, the mode of death is sudden. Ventricular tachycardia and fibrillation represent the majority of arrhythmias; the mechanisms responsible are heterogeneous and complex. Myocardial scar, a... |
396 | Complications during pharmacological stress echocardiography: a video-case series. | Stress echocardiography is a cost-effective tool for the modern noninvasive diagnosis of coronary artery disease. Several physical and pharmacological stresses are used in combination with echocardiographic imaging, usually exercise, dobutamine and dipyridamole. The safety of a stress is (or should be) a major determin... |
397 | Sudden cardiac death and inherited arrhythmia syndromes. | Sudden cardiac death (SCD) at youth is rare and is often caused by inherited cardiac disorders. This review focuses on the genetic background of inherited primary electrical diseases, the so-called "channelopathies." Following a short clinical description of each syndrome, the recent findings in the genetics of long QT... |
398 | Ventricular tachycardia/ventricular fibrillation ablation in the setting of ischemic heart disease. | Recurrent ventricular tachycardia (VT) in the setting of coronary artery disease is frequently a life-threatening electrophysiologic emergency. Even in patients with an implantable defibrillator, recurrent VT is frequently accompanied by repeated and disabling shock therapy. Catheter ablative therapy offers the ability... |
399 | Electrophysiological basis and genetics of Brugada syndrome. | Brugada syndrome is a primary arrhythmic syndrome arising in the structurally normal heart. Any proposed mechanism should account for the major features of the syndrome: localization of the ST segment and T-wave changes to the right precordial leads, association of conduction slowing at several levels, precipitation or... |
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