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1,300 | [Long survival with chronic ventricular fibrillation under support of uni-left-ventricular assist system]. | Few minutes of suspended malignant ventricular arrhythmia may be permitted for the patient with left ventricular assist system (LVAS). However, longer and continuous ventricular arrhythmia, especially ventricular fibrillation (Vf), may induce the low output of LVAS, which leads circulatory collapse immediately. Our pre... |
1,301 | Total failure to sense ventricular fibrillation with inappropriate defibrillator sensitivity adjustment. | Automatic Sensitivity Control, unique to St. Jude defibrillators, allows for programmable sensitivity threshold and refractory periods. However, inappropriate programming can lead to marked undersensing and potentially lethal complications. We report a case of complete failure to sense ventricular fibrillation with ina... |
1,302 | Resumption of atrioventricular conduction by levosimendan after radiofrequency ablation of the AV node: | We report the case of a patient in whom radiofrequency catheter ablation of the AV node was initially successfully performed for persistent atrial fibrillation with fast ventricular rate, but in whom atrioventricular conduction transiently resumes following therapy with levosimendan. Plausible hypothesis are discussed ... |
1,303 | Quantification of atrial tachyarrhythmia burden with an implantable pacemaker before and after pulmonary vein isolation. | Long-term efficacy of pulmonary vein (PV) ostial isolation for paroxysmal atrial fibrillation is difficult to assess. We evaluated the net duration of atrial tachyarrhythmia episodes (burden), atrial tachyarrhythmia episode frequency, and quality-of-life (QOL) before and after PV isolation in patients with an existing ... |
1,304 | Strategies for perioperative arrhythmias. | Rapid atrial arrhythmias affect close to one million elderly Americans who undergo cardiac or non-cardiac operations annually and have been associated with prolonged hospital stays. In contrast, bradyarrhythmias or ventricular arrhythmias severe enough to require treatment occur in less than 1% of patients who undergo ... |
1,305 | Impact of nesiritide on health care resource utilization and complications in patients with decompensated heart failure. | To determine the impact of nesiritide on health care resource utilization and complications in patients hospitalized with decompensated heart failure.</AbstractText>Retrospective case-control study.</AbstractText>United States hospitals.</AbstractText>Two hundred sixteen patients hospitalized for decompensated heart fa... |
1,306 | Isolated noncompaction of the left ventricular myocardium in an elderly patient. | Noncompaction of the ventricular myocardium (NVM) is a rare disorder of endomyocardial morphogenesis characterized by numerous, prominent trabeculations and deep intertrabecular recesses. It is commonly associated with congenital heart disease, but the isolated form (INVM) is not associated with other structural heart ... |
1,307 | Brugada syndrome presenting with sustained monomorphic ventricular tachycardia. | Typically Brugada syndrome presents with either ventricular fibrillation or polymorphic ventricular tachycardia that may result in sudden death or syncope in patients without any structural heart disease. We report the case of a patient with Brugada syndrome who presented atypically with recurrent presyncope following ... |
1,308 | Echocardiographic changes in patients with malignant phase hypertension: the West Birmingham Malignant Hypertension Register. | In order to study the echocardiographic abnormalities in consecutive patients with malignant phase hypertension (MHT), we reviewed echocardiograms of 31 patients (23 male; mean age 52+/-14 years) with MHT who were admitted to our unit. Trans-thoracic echocardiography was carried out in all patients, and echocardiograph... |
1,309 | Failure to demonstrate myocardial protective effects of the ultra short-acting calcium antagonist clevidipine in a closed-chest reperfusion porcine model. | Restoration of myocardial perfusion is essential in acute myocardial infarction for the salvaging of myocardial tissue. However, reperfusion per se can provoke myocardial necrosis within the jeopardized tissue. Yet, no intervention has been successfully applied to the clinical situation in this matter. Clevidipine, an ... |
1,310 | Transvenous cryoablation of cardiac arrhythmias. | This study reports on the acute and long-term results of cryoablation in patients with supraventricular and ventricular tachycardia. One hundred fifty nine patients with cardiac arrhythmias (147 with supraventricular and 12 with ventricular tachycardia) were consecutively enrolled in our institution to undergo trnasven... |
1,311 | Limitations to antiarrhythmic drug use in patients with atrial fibrillation. | Of the antiarrhythmic agents currently marketed in Canada, 5 are commonly used to treat atrial fibrillation (AF). The impact of contraindications, warnings and precautions for the use of these drugs in patients with AF is not known. We evaluated the proportion of patients with AF for whom contraindications, warnings an... |
1,312 | Ventricular fibrillation frequency characteristics and time evolution in piglets: a developmental study. | Derived variables of ventricular fibrillation, such as the frequency distribution by fast Fourier transformation and its evolution over time, have been used to determine the optimum timing for defibrillation. We hypothesized that these frequency variables would differ among neonatal, young child and older child populat... |
1,313 | Effects of hypertonic versus isotonic infusion therapy on regional cerebral blood flow after experimental cardiac arrest cardiopulmonary resuscitation in pigs. | To evaluate the effects of hypertonic, isooncotic, and isotonic infusion therapy on cerebral blood flow (CBF) during and after cardiopulmonary resuscitation (CPR) from experimental cardiac arrest (CA).</AbstractText>In 32 domestic swine (13-23 kg) open chest CPR was initiated after 8 min of ventricular fibrillation. Wi... |
1,314 | Electrical therapy for post defibrillatory pulseless electrical activity. | Defibrillation may convert ventricular fibrillation (VF) only to reveal profound mechanical dysfunction. Survival following this dysfunction, known as pulseless electrical activity (PEA) and electromechanical dissociation (EMD), is uncommon. We sought to evaluate an electrical therapy for primary post shock PEA followi... |
1,315 | Incidence of EMS-treated out-of-hospital cardiac arrest in the United States. | The potential impact of efforts to improve the chain of survival for out-of-hospital sudden cardiac arrest (SCA) is unclear in part because estimates of the incidence of treatable cases of SCA are uncertain. The aim of the investigation was to determine a representative national incidence of emergency medical services ... |
1,316 | Preliminary in-hospital experience with a fully automatic external cardioverter-defibrillator. | Ventricular fibrillation (VF) and ventricular tachycardia (VT) are frequently present as initial rhythms during in-hospital cardiac arrest. Although ample evidence exists to support the need for rapid defibrillation, the response to in-hospital cardiac arrest remains without major advances in recent years. The delay be... |
1,317 | Treatment of atrial fibrillation by catheter-based procedures. | Catheter-based procedures have been developed with a view to reproduce or improve upon the excellent results of the Maze procedure in the treatment of atrial fibrillation (AF). Linear epicardial lesions created using minimally invasive techniques, or endocardial lesions to encircle the pulmonary veins (PV) have been as... |
1,318 | Atrial fibrillation and heart failure: natural history and pharmacological treatment. | Atrial fibrillation (AF) is the most common sustained arrhythmia. Congestive heart failure (CHF), an increasingly frequent cardiovascular disorder affecting millions of people world-wide, has become the most important risk factor of AF in developed countries, as a result of ageing populations. Approximately two thirds ... |
1,319 | [Specific complications in the treatment with implantable cardioverter-defibrillators]. | Using implantable cardioverter-defibrillators in treatment of malignant ventricular arrhythmias revealed new complications specific to this therapy. Inappropriate therapy, arrhythmic storm and device related proarrhythmia belong to the most significant complications. The authors describe specific complications in a gro... |
1,320 | QT prolongation through hERG K(+) channel blockade: current knowledge and strategies for the early prediction during drug development. | Prolongation of the QT interval of the electrocardiogram is a typical effect of Class III antiarrhythmic drugs, achieved through blockade of potassium channels. In the past decade, evidence has accrued that several classes of drugs used for non-cardiovascular indications may prolong the QT interval with the same mechan... |
1,321 | Cognitive impairment in survivors of out-of-hospital cardiac arrest. | The huge importance of rapid provision of care, especially early defibrillation, for survival of out-of-hospital cardiac arrest (OHCA) is well known. This prospective cohort study investigated cognitive functioning of OHCA survivors in relation to the time-related elements of the resuscitation.</AbstractText>Fifty-seve... |
1,322 | In vitro atrial flow dynamics: normal conditions versus atrial fibrillation. | The flow dynamics in the atrium is poorly described. The reasons are principally due to the complicated geometry of the cavity and its contractility. The present in vitro study focuses on the description of the flow in the left atrium in normal conditions (NC) and in atrial fibrillation (AF). The final objective is to ... |
1,323 | Role of previous treatment with sulfonylureas in diabetic patients with acute myocardial infarction: results from a nationwide French registry. | The cardiovascular effects of sulfonylureas (SU) in diabetic patients are controversial and it has been suggested that diabetic patients with acute myocardial infarction while on SU were at increased risk.</AbstractText>To assess the in-hospital outcome of patients with acute myocardial infarction according to the use ... |
1,324 | Thrombolysis and adjunctive therapy in acute myocardial infarction: the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy. | This chapter about antithrombotic therapy for acute myocardial infarction (MI) is part of the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy: Evidence Based Guidelines. Grade 1 recommendations are strong and indicate that the benefits do, or do not, outweigh risks, burden, and costs. Grade 2 suggest... |
1,325 | Antithrombotic therapy in atrial fibrillation: the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy. | This chapter about antithrombotic therapy in atrial fibrillation (AF) is part of the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy: Evidence Based Guidelines. Grade 1 recommendations are strong and indicate that the benefits do, or do not, outweigh risks, burden, and costs. Grade 2 suggests that in... |
1,326 | Atrial ionic remodeling induced by atrial tachycardia in the presence of congestive heart failure. | Atrial fibrillation (AF) and congestive heart failure (CHF) produce discrete forms of atrial ionic remodeling. The in vivo effects of atrial tachycardia (AT) remodeling are altered by CHF. This study evaluated underlying mechanisms at the level of ionic remodeling.</AbstractText>We studied 4 groups of dogs: (1) unpaced... |
1,327 | Mechanism of pacing-induced ventricular fibrillation in the infarcted human heart. | The mechanisms by which ventricular fibrillation (VF) is initiated in the infarcted human heart have not been defined.</AbstractText>Left ventricular noncontact mapping of 8 episodes of pacing-induced VF in 6 patients (age 64.8+/-7.9 years, with previous myocardial infraction and left ventricular ejection fraction of 3... |
1,328 | Health system costs of out-of-hospital cardiac arrest in relation to time to shock. | Early defibrillation results in higher admission rates and healthcare costs. This study determined the healthcare resources used and related medical costs after out-of-hospital cardiac arrest (OHCA) in relation to time to shock. We assessed the incremental healthcare costs per life gained from reduction in time to shoc... |
1,329 | Efficacy of quinidine in high-risk patients with Brugada syndrome. | Automatic implantable cardioverter-defibrillator therapy is considered the only effective treatment for high-risk patients with Brugada syndrome. Quinidine depresses I(to) current, which may play an important role in the arrhythmogenesis of this disease.</AbstractText>The effects of quinidine bisulfate (mean dose, 1483... |
1,330 | Ximelagatran: a new antithrombotic option in atrial fibrillation. | Treatment strategies in patients with atrial fibrillation typically involve pharmacologic or interventional invasive therapies to suppress the rhythm, control ventricular contraction rates, or prevent thromboembolic complications. Current therapies used for rhythm conversion in atrial fibrillation may have undesirable ... |
1,331 | Antiarrhythmic and proarrhythmic properties of QT-prolonging antianginal drugs. | In recent years there has been a major reorientation of drug therapy for cardiac arrhythmias, its changing role, and above all, a radical change in the class of arrhythmia drugs because of their impact on mortality. The decline in the use of sodium-channel blockers has led to an ex panding use of beta-blockers and simp... |
1,332 | Right ventricular pacing via left superior vena cava. | Negotiating the pacing lead into the right ventricle via left superior vena cava, at times, can be difficult. We report two such cases in which pacing leads were introduced into the right ventricle via left superior vena cava, with the help of stylet tip shaped into a large pigtail loop. |
1,333 | Effect of smoking on QT interval, QT dispersion and rate pressure product. | Smoking may predispose to ventricular fibrillation and sudden cardiac death by altering ventricular recovery time dispersion indices. However, effect of acute smoking on QT interval and QT dispersion in chronic smokers has not been studied so far.</AbstractText>Effect of cigarette smoking on ventricular recovery time d... |
1,334 | Control of rate versus rhythm in rheumatic atrial fibrillation: a randomized study. | Patients with rheumatic heart disease and atrial fibrillation incur significant morbidity and mortality. It is not known which approach, rate control or maintenance of sinus rhythm might be most appropriate. The present study was undertaken to compare the strategy of ventricular rate control versus maintenance of sinus... |
1,335 | Characterization of QT interval adaptation to RR interval changes and its use as a risk-stratifier of arrhythmic mortality in amiodarone-treated survivors of acute myocardial infarction. | A new method is proposed to evaluate the dynamics of QT interval adaptation in response to heart rate (HR) changes. The method considers weighted averages of RR intervals (RR) preceding each cardiac beat to express RR interval history accounting for the influence on repolarization duration. A global optimization algori... |
1,336 | Surgical treatment of atrial fibrillation through isolation of the left atrial posterior wall in patients with chronic rheumatic mitral valve disease. A randomized study with control group. | To determine the effectiveness of surgical isolation of the left atrial posterior wall encompassing the ostia of the pulmonary veins for the treatment of atrial fibrillation of rheumatic etiology.</AbstractText>Prospective and randomized study of patients with rheumatic mitral valve disease, persistent atrial fibrillat... |
1,337 | [Assessment of regional wall motion using strain Doppler imaging during right ventricular bifocal pacing in a patient with severe congestive heart failure: a case report]. | A 79-year-old man presented with dilated cardiomyopathy and chronic atrial fibrillation. A DDD pacemaker was implanted due to sick sinus syndrome. His left ventricular ejection fraction was 23%. He was repeatedly admitted with congestive heart failure. Although cardiac resynchronization therapy was attempted, insertion... |
1,338 | Radiofrequency ablation in children with asymptomatic Wolff-Parkinson-White syndrome. | Ventricular fibrillation can be the presenting arrhythmia in children with asymptomatic Wolff-Parkinson-White syndrome. Deaths due to this arrhythmia are potentially preventable.</AbstractText>We performed a randomized study in which prophylactic radiofrequency catheter ablation of accessory pathways was compared with ... |
1,339 | Tissue Doppler echocardiography and biventricular pacing in heart failure: patient selection, procedural guidance, follow-up, quantification of success. | Asynchronous myocardial contraction in heart failure is associated with poor prognosis. Resynchronization can be achieved by biventricular pacing (BVP), which leads to clinical improvement and reverse remodeling. However, there is a substantial subset of patients with wide QRS complexes in the electrocardiogram that do... |
1,340 | Intrapericardial ibutilide administration fails to terminate pacing-induced sustained atrial fibrillation in dogs. | The hypothesis that intrapericardial (ip.) ibutilide administration would terminate pacing-induced sustained atrial fibrillation (AF) and ibutilide distribution were tested.</AbstractText>Sustained (> or =24 hours) AF was induced by 59 +/- 20 day rapid atrial pacing in 19 dogs. After sustained AF was present, the at... |
1,341 | Perioperative enoximone infusion improves cardiac enzyme release after CABG. | To assess whether routine postoperative enoximone infusion compared with dobutamine improved clinical and biochemical results after coronary artery bypass grafting with cardiopulmonary bypass.</AbstractText>Prospective nonrandomized study. Data collection was blinded to the choice of inotrope.</AbstractText>Double-inst... |
1,342 | Mode of death after admission to an intensive care unit following cardiac arrest. | To determine the mode of death in patients admitted to an intensive care unit (ICU) after cardiac arrest who died before hospital discharge.</AbstractText>Prospectively defined retrospective review of a database and individual patient medical records and ICU charts.</AbstractText>Eleven-bed multidisciplinary intensive ... |
1,343 | "Early" class III drugs for the treatment of atrial fibrillation: efficacy and atrial selectivity of AVE0118 in remodeled atria of the goat. | Currently available antiarrhythmic drugs are only moderately effective against atrial fibrillation (AF) and may cause ventricular proarrhythmia. AVE0118 is a blocker of atrium-specific early K+ currents (I(Kur)/I(to)).</AbstractText>Effects of intravenous AVE0118 and dofetilide on atrial effective refractory period (AE... |
1,344 | Giving IV and oral amiodarone perioperatively for the prevention of postoperative atrial fibrillation in patients undergoing coronary artery bypass surgery: the GAP study. | We studied the use of perioperative IV and oral administration of amiodarone for the prevention of postoperative atrial fibrillation in patients undergoing coronary artery bypass graft surgery (CABG).</AbstractText>In the United States, > 500,000 patients undergo CABG each year. Numerous studies to date have suggest... |
1,345 | Risk of proarrhythmic events in the Atrial Fibrillation Follow-up Investigation of Rhythm Management (AFFIRM) study: a multivariate analysis. | This study examined the risk of proarrhythmic events in patients receiving antiarrhythmic drugs for treatment of atrial fibrillation (AF) according to present-day safety guidelines.</AbstractText>Advances in understanding the proarrhythmic risk of antiarrhythmic drugs has led to development of safety guidelines for the... |
1,346 | Increased incidence of life-threatening ventricular arrhythmias in implantable defibrillator patients after the World Trade Center attack. | This study was designed to evaluate whether the destruction of the World Trade Center (WTC) on September 11, 2001 (9/11), led to an increased frequency of ventricular arrhythmias among patients fitted with an implantable cardioverter-defibrillator (ICD).</AbstractText>The WTC attack induced psychological distress. Beca... |
1,347 | Cardiac arrhythmias: the quest for a cure: a historical perspective. | During the last 40 years, much progress has been made in our understanding and management of cardiac arrhythmias. A major step in the late 1960s was to combine programmed electrical stimulation of the heart with intracardiac activation recording. This allowed: 1) localization of the site of the block in the atrioventri... |
1,348 | Molecular mechanisms and global dynamics of fibrillation: an integrative approach to the underlying basis of vortex-like reentry. | Art Winfree's scientific legacy has been particularly important to our laboratory whose major goal is to understand the mechanisms of ventricular fibrillation (VF). Here, we take an integrative approach to review recent studies on the manner in which nonlinear electrical waves organize to result in VF. We describe the ... |
1,349 | [Surgical treatment of secundum atrial septal defects in adults over 30 years old]. | To summarize the experience of surgical treatment of secundum atrial septal defects in adults over 30 years old.</AbstractText>There were 469 patients with secundum atrial septal defects in our study (male 144, female 325; ages 30-68, mean 38.6 years old). There were 105 cases with pulmonary hypertension and 458 cases ... |
1,350 | Clustering of RR intervals predicts effective electrical cardioversion for atrial fibrillation. | Atrial fibrillation (AF) is characterized by an irregularly irregular ("random") heart beat. However, controversy exists whether the ventricular rhythm in AF is truly random. We investigated randomness by constructing three-dimensional RR interval plots (3D plots), allowing identification of "clustering" of RR interval... |
1,351 | Differences in tachyarrhythmia detection and implantable cardioverter defibrillator therapy by primary or secondary prevention indication in cardiac resynchronization therapy patients. | Although numerous trials have shown benefit of implantable cardioverter defibrillators (ICDs) for either primary or secondary prevention, no trial has prospectively enrolled patients from both indications and analyzed ICD utilization between groups.</AbstractText>We performed a retrospective review of MIRACLE ICD, a ra... |
1,352 | [Arrhythmias]. | The success of the radiofrequency catheter ablation procedure for most types of supraventricular and ventricular tachycardia largely eliminated the role of surgical therapy of arrhythmias. However, there remains a subset of arrhythmia patients in whom urgent surgical treatments are required. In this review we mention r... |
1,353 | Differences in mechanisms and outcomes of syncope in patients with coronary disease or idiopathic left ventricular dysfunction as assessed by electrophysiologic testing. | This study evaluated the causes of syncope and the significance and differences in left ventricular (LV) dysfunction, coronary disease, and idiopathic dilated cardiomyopathy (DCM).</AbstractText>Risk stratification of and indications for an automated defibrillator could differ according to the cause of LV dysfunction.<... |
1,354 | Prevention of ventricular fibrillation, acute myocardial infarction (myocardial necrosis), heart failure, and mortality by bretylium: is ischemic heart disease primarily adrenergic cardiovascular disease? | It is widely, but mistakenly, believed that ischemic heart disease (IsHD) and its complications are the sole and direct result of reduced coronary blood flow by obstructive coronary artery disease (CAD). However, cardiac angina, acute myocardial infarction (AMI), and sudden cardiac death (SCD) occur in 15%-20% of patie... |
1,355 | Comparison of rate and rhythm control in patients with atrial fibrillation and nonischemic heart failure. | Atrial fibrillation (AF) is a very common cardiac arrhythmia with an increased mortality in patients with heart failure. Whether the best therapeutic approach to these patients is to restore sinus rhythm or to adequately control the ventricular rate is still controversial. The aim of this study was to compare both stra... |
1,356 | Predictors of heart failure among women with coronary disease. | Although heart failure is common among women with coronary disease, the risk factors for developing heart failure have not been well studied. We determined the risk factors for developing heart failure among postmenopausal women with established coronary disease.</AbstractText>This is a prospective cohort study using d... |
1,357 | Transventricular mitral commissurotomy in critical mitral stenosis during pregnancy. | The management of a pregnant patient with mitral stenosis is a subject of debate with regards to the optimal type of treatment and the time of intervention. We performed trans-ventricular mitral commissurotomy (TVMC) either as an isolated procedure in the second trimester, or in combination with Cesarian section at ter... |
1,358 | Systematic review: cardiac resynchronization in patients with symptomatic heart failure. | Even with optimal pharmacotherapy, symptomatic heart failure is associated with substantial morbidity and mortality.</AbstractText>To determine the efficacy and safety of cardiac resynchronization therapy in adults with advanced systolic heart failure.</AbstractText>The Cochrane Central Register of Controlled Trials (2... |
1,359 | Inhibition of ischemia/reperfusion-induced damage by dexamethasone in isolated working rat hearts: the role of cytochrome c release. | We investigated the contribution of dexamethasone treatment on the recovery of postischemic cardiac function and the development of reperfusion-induced arrhythmias in ischemic/reperfused isolated rat hearts. Rats were treated with 2 mg/kg of intraperitoneal injection of dexamethasone, and 24 hours later, hearts were is... |
1,360 | Cost effectiveness of therapies for atrial fibrillation. A review. | Atrial fibrillation is the most common supraventricular tachyarrhythmia encountered in clinical practice, affecting over 5% of persons over the age of 65 years. A common pathophysiological mechanism for arrhythmia development is atrial distention and fibrosis induced by hypertension, coronary artery disease or ventricu... |
1,361 | [The Brugada syndrome. To be evoked in case of malaise in a young adult]. | A DIAGNOSIS TO BE EVOKED: The Brugada syndrome is a rare but serious inherited disease that causes sudden cardiac death by ventricular tachycardia and fibrillation, especially in younger men. Diagnostic problems are related to the possible absence of symptoms although the electrocardiogram (ECG) reveals the characteris... |
1,362 | Prevention of primary ventricular fibrillation in acute myocardial infarction with prophylactic lidocaine. | Primary ventricular fibrillation (VF) during an acute myocardial infarction (AMI) occurs with a high incidence and mortality rate with or without thrombolysis. The incidence varies from 2% to 19% depending on the definition of "primary." Primary VF in this study refers to fibrillation occurring in the absence of shock ... |
1,363 | [The effect of K(ATP)-channel activation on the electrical stability of myocardium in rats with postinfarction cardiosclerosis]. | Opening of the ATP-dependent K-channels (K(ATP) channels) upon intravenous administration of the cardioselective activator BMS 180448 (3 mg/kg) decreased the ventricular fibrillation threshold (VFT) in rats with postinfarction cardiosclerosis (PIC). Preliminary injection of the selective K(ATP) channel blocker glibencl... |
1,364 | [Autoantibodies Against beta(1)-Adrenoreceptors in Patients With Cardiac Rhythm Disorders. Prevalence and Possible Role in Development of Arrhythmia]. | To assess prevalence of autoantibodies against beta(1)-adrenoreceptors (beta(1)-AR) in patients with arrhythmias of various etiology.</AbstractText>Patients with arrhythmias (n=110, including 59 patients with primary [idiopathic] electrical abnormalities, 33 - with chronic myocarditis and dilated cardiomyopathy [DCM]; ... |
1,365 | [Cardiopulmonary stress test in patients with heart failure and atrial fibrillation]. | The cardiopulmonary stress test (CPST) allows the objective assessment of stress capacity in patients (pts) with heart failure (HF). There are a small number of studies concerning CPST in pts with HF and AF.</AbstractText>to assess the influence of AF on CPST parameters in pts with HF.</AbstractText>The study group con... |
1,366 | [Long-term results of radiofrequency (RF) catheter ablation of cardiac arrhythmias]. | Although the short-term results after radiofrequency (RF) catheter ablation of atrioventricular nodal reentrant tachycardia (AVNRT), accessorry pathway (AP), atrioventricular junction (AVJ) and common atrial flutter (Aflu) have been widely reported, there is insufficient data on long-term outcome.</AbstractText>To eval... |
1,367 | Genetic analysis of the cardiac sodium channel gene SCN5A in Koreans with Brugada syndrome. | The SCN5A gene encodes the alpha subunit of the human cardiac voltage-gated sodium channel. Mutations in SCN5A are responsible for Brugada syndrome, an inherited cardiac disease that leads to idiopathic ventricular fibrillation (IVF) and sudden death. In this study, we screened nine individuals from a single family and... |
1,368 | [Implantation of an automatic cardioverter-defibrillator in small children--two case reports]. | Implantation of an automatic cardioverter-defibrillator (ICD) in children may be challenging due to the increased risk of periprocedural and long-term complications. ICD was implanted in two boys with hypertrophic cardiomyopathy, aged 6 and 9 years, with of a body weight of 20 and 25 kg, respectively. In one patient an... |
1,369 | Intermittent hypoxic training protects canine myocardium from infarction. | This investigation examined cardiac protective effects of normobaric intermittent hypoxia training. Six dogs underwent intermittent hypoxic training for 20 consecutive days in a normobaric chamber ventilated intermittently with N2 to reduce fraction of inspired oxygen (FiO2) to 9.5%-10%. Hypoxic periods, initially 5 mi... |
1,370 | Predictors of sudden cardiac death after Mustard or Senning repair for transposition of the great arteries. | The goal of this research was to identify predictors for sudden death (SD) in patients with transposition of the great arteries (TGA) who have undergone atrial inflow repair.</AbstractText>Sudden death is the most common cause of late death after atrial inflow repair of TGA. Little is known about the predictors of SD.<... |
1,371 | Prognostic implications of atrial fibrillation in patients undergoing myocardial perfusion single-photon emission computed tomography. | The aim of this research was to determine whether presence of atrial fibrillation (AF) provides incremental prognostic information relative to myocardial perfusion single-photon emission computed tomography (MPS) with respect to risk of cardiac death (CD).</AbstractText>The prognostic significance of AF in patients und... |
1,372 | Myocardial protection with postconditioning is not enhanced by ischemic preconditioning. | Ischemic preconditioning (IPC) has been used in off-pump coronary artery bypass surgery (OPCAB) to reduce potential injury secondary to ligation of the target vessel. Previous studies have shown that a brief period of repetitive coronary occlusion applied at the onset of reperfusion, postconditioning (postcon), attenua... |
1,373 | Bedside programmed ventricular stimulation for sudden death risk stratification. | Patients with myocardial infarction and left ventricular dysfunction are at risk for sudden death. This research was conducted to determine the applicability and safety of a bedside programmed stimulation protocol to determine the risk for sudden death in these patients.</AbstractText>Four hundred and twelve patients w... |
1,374 | Acute ventricular rate control in atrial fibrillation and atrial flutter. | Atrioventricular node blocking agents including beta-adrenergic blockers, non-dihydropyridine calcium channel blockers and digoxin are usually effective in controlling ventricular rate in atrial fibrillation and flutter. Intravenous beta-blockers and non-dihydropyridine calcium channel blockers are equally effective in... |
1,375 | Magnesium prophylaxis for arrhythmias after cardiac surgery: a meta-analysis of randomized controlled trials. | Magnesium supplementation may reduce the incidence of arrhythmias, which often occur after cardiac surgery; however, recent findings of the effectiveness of magnesium prophylaxis have yielded discrepant results.</AbstractText>We searched electronic databases for randomized controlled trials of magnesium for the prevent... |
1,376 | Influence of paroxysmal atrial fibrillation attack on brain natriuretic peptide secretion. | Plasma brain natriuretic peptide (BNP) concentration is higher during atrial fibrillation (Af) than sinus rhythm, based on studies of electrical defibrillation treatment of patients with chronic Af. However, the change in paroxysmal atrial fibrillation (PAf) is not well known. This study investigated such changes and t... |
1,377 | [Rapidly lethal progression of a therapy-resistant status epilepticus]. | We present a case of death after first manifestation of generalised convulsive status epilepticus in a young man. A previously healthy 23-year-old man was admitted to our emergency department by ambulance service with approximately 20 min of generalised convulsive seizures. First line treatment in the emergency ward wi... |
1,378 | [Polymorphic ventricular tachycardia with a short coupling interval in a patient with normal heart--a case report]. | We describe a case of a 59-year-old female with paroxysmal atrial fibrillation and arterial hypertension who had syncopal attacks due to polymorphic ventricular tachycardia (PMVT) with a short coupling interval of an initiating beat (280 msec). We excluded structural heart disease. In the resting ECG the QTc interval w... |
1,379 | Safety of transvenous temporary cardiac pacing in patients with accidental digoxin overdose and symptomatic bradycardia. | Patients with digoxin intoxication may need transvenous temporary cardiac pacing (TCP) when symptomatic bradyarrhythmias are present. However, it has been reported that TCP might be associated with fatal arrhythmias in patients with acute digitalis intoxication caused by attempted suicide. The aim of this study was to ... |
1,380 | Radiofrequency ablation of idiopathic ventricular fibrillation guided by noncontact mapping. | A 32-year-old man with idiopathic ventricular fibrillation and an implantable cardioverter defibrillator presented during a ventricular fibrillation storm. Frequent monomorphic ventricular ectopics with left bundle branch block morphology were documented, some of which initiated fibrillation. He underwent noncontact ma... |
1,381 | Death due to an implantable cardioverter defibrillator. | Inappropriate therapy due to noise oversensing caused a true ventricular fibrillation (VF) and death of a patient. A 49-year-old patient with a history of dilated cardiomyopathy received a double-chamber implantable cardioverter defibrillator (ICD) in 1991 for a sustained inducible ventricular tachycardia (VT). One app... |
1,382 | Canine model of Brugada syndrome using regional epicardial cooling of the right ventricular outflow tract. | Myocardial cooling can induce J point elevation (Osborn wave) as seen on ECG of the Brugada syndrome by activating transient outward current (Ito) and causing a spike-and-dome configuration of the monophasic action potential (MAP) in the ventricular epicardium in isolated canine ventricular wedge preparations. We deter... |
1,383 | Impact of biphasic electrical cardioversion of atrial fibrillation on early recurrent atrial fibrillation and shock efficacy. | Early recurrent atrial fibrillation (ERAF) after external cardioversion of atrial fibrillation (AF) occurs in 12% to 26% of patients. Whether biphasic cardioversion has an impact on the incidence of ERAF after cardioversion of AF is unclear.</AbstractText>Consecutive patients (n = 216, mean age 66 years, 71% male, 88% ... |
1,384 | Sotalol reverses remodeled action potential in patients with chronic atrial fibrillation but does not prevent arrhythmia recurrence. | Recurrence of atrial fibrillation (AF) may be related to AF-induced electrical remodeling characterized by shortening of the atrial action potential duration (APD) and loss of its rate adaptation. We investigated the effects of pretreatment with oral d,l-sotalol on rate-dependent changes in atrial monophasic action pot... |
1,385 | Relationships between depolarization abnormality and repolarization abnormality in patients with Brugada syndrome: using body surface signal-averaged electrocardiography and body surface maps. | Repolarization and depolarization abnormalities have been reported to be related to Brugada syndrome.</AbstractText>We evaluated the relationships between repolarization abnormality and depolarization abnormality using 48-lead unipolar signal-averaged electrocardiograms and 87-lead unipolar body surface maps in 15 pati... |
1,386 | [Cardiac failure in Chilean hospitals: results of the National Registry of Heart Failure, ICARO]. | Heart failure (HF) is a major public health problem. In Chile hospitalized patients due to HF have not been characterized.</AbstractText>To evaluate clinical profile and outcome of patients hospitalized for heart failure in Chilean hospitals.</AbstractText>Prospective registry of 14 centers. Patients hospitalized for H... |
1,387 | Mice with cardiac-restricted angiotensin-converting enzyme (ACE) have atrial enlargement, cardiac arrhythmia, and sudden death. | To investigate the local effects of angiotensin II on the heart, we created a mouse model with 100-fold normal cardiac angiotensin-converting enzyme (ACE), but no ACE expression in kidney or vascular endothelium. This was achieved by placing the endogenous ACE gene under the control of the alpha-myosin heavy chain prom... |
1,388 | Automated external defibrillators: safety and efficacy in children and adolescents. | Although children do not suffer from ventricular fibrillation (VF) as frequently as adults, it does occur in 10% to 20% of pediatric cardiac arrests. The technology is available to recognize and treat ventricular fibrillation in children as quickly as we can for adults. This article discusses the evidence to support au... |
1,389 | Commotio cordis. | Commotio cordis is ventricular fibrillation that results from blunt chest trauma and is a life threatening condition; early resuscitation and defibrillation are critical. This may occur during sporting events or from child abuse and most patients are boys who are younger than 16 years. Commotio cordis' prognosis depend... |
1,390 | Ventricular fibrillation: basic concepts. | This brief overview serves as an introduction to the vast array of basic and clinical concepts that are pertinent to the basic understanding of ventricular fibrillation, its genesis, and its clinical management. |
1,391 | Sudden cardiac death in children and adolescents: introduction and overview. | Sudden unexpected cardiac death (SCD) in a child or adolescent is a devastating event with serious impact on the family, the school, and the community. This article reviews the epidemiology of SCD in children and adolescents and includes a discussion of its incidence and etiologies. It also discusses strategies for pre... |
1,392 | Arrhythmias observed during high-G training: proposed training safety criterion. | Most arrhythmias during centrifuge training are physiological responses to high +Gz stress. However, potentially dangerous arrhythmias occasionally occur during centrifuge training. We reviewed all arrhythmias recorded during the Japan Air Self-Defense Force (JASDF) centrifuge training from April 2001 to March 2003, an... |
1,393 | The association of chronic atrial fibrillation with right atrial dilatation and left ventricular dysfunction in the elderly. | Left atrial dilatation is often considered as one of the important causes for atrial fibrillation. In this study we sought to examine the relationship between right atrial dilatation and left ventricular function in patients with atrial fibrillation, and the association with the documented duration of the dysrrhythmia.... |
1,394 | Blockers of the Kv1.5 channel for the treatment of atrial arrhythmias. | Atrial arrhythmias are a common problem in cardiological practice. Despite the availability of several antiarrhythmic drugs, there is a medical need for safer and more efficient antiarrhythmic treatment. Compounds that act atrial selectively without prolonging the QTc-time and without negative inotropy to terminate and... |
1,395 | Blockers of the slowly delayed rectifier potassium IKs channel: potential antiarrhythmic agents. | Prolongation of the cardiac action potential and the effective refractory period is a proven principle to prevent cardiac arrhythmias, especially under conditions when the action potential is shortened. Several approaches have been made to achieve this effect selectively and without proarrhythmic side effects. Besides ... |
1,396 | IKr channel blockers: novel antiarrhythmic agents. | There have been extensive efforts to develop I(Kr) channel blockers as a new antiarrhythmic agent for atrial or ventricular fibrillation, since it was demonstrated that selective blockade of the rapidly activating delayed rectifier K+ channel (I(Kr)) in the heart is not deleterious for the total mortality in fatal vent... |
1,397 | [The practice guideline 'Atrial fibrillation' from the Dutch College of General Practitioners; a response from the perspective of general practice]. | The practice guideline 'Atrial fibrillation' (AF) from the Dutch College of General Practitioners is a clearly written survey on the diagnosis and treatment of AF in general practice. Rapid cardioversion is no longer an indication for acute referral in AF. As AF, heart failure and COPD often occur simultaneously among ... |
1,398 | Echocardiographic evidence of left atrial abnormality in young patients with lone paroxysmal atrial fibrillation. | Usual assessment of left atrial size by 2-dimensional echocardiography in the anteroposterior dimension often underestimates the true atrial size. We compared 15 young patients (< or =50 years old) with lone paroxysmal atrial fibrillation to age-matched controls, and measured atrial size in the inferosuperior and me... |
1,399 | Cardiac Pacing for Bradycardia Support: Evidence-based Approach to Pacemaker Selection and Programming. | The vast majority of pacemakers implanted in the United States for the treatment of symptomatic bradycardia are dual-chamber systems with a complex array of functions, such as rate responsiveness, dynamic atrioventricular delay, and automatic mode switching. Basic hemodynamic studies have convincingly demonstrated the ... |
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