Search Results
Results 251 - 300 of 1350
< 1 2 3 4 5 6 7 8 9 10 11 >
Volkmer Marius - - 2006
AIMS: For ablation of ventricular tachycardia (VT) in patients after myocardial infarction, a three-dimensional mapping system is often used. We report on our overall success rate of VT ablation using CARTO in 47 patients, with a subgroup analysis comparing VT mapping with the results of mapping that had to be ...
Nogales Asensio Juan M - - 2007
Flecainide is an antiarrhythmic considered safe in patients who have no structural cardiopathy, and frequently used in the prevention of atrial fibrillation. However, in patients with a history of infarction and/or severe conduction disorders, its proarrhythmicity may be lethal. Torsade-de-pointes type tachycardia is not included as one of these proarrhythmic ...
Yap Sing-Chien - - 2007
AIMS: To investigate outcome and complications of implantable cardioverter defibrillators (ICDs) in adults with congenital heart disease (CHD) and to identify predictors of (in-) appropriate shocks. METHODS AND RESULTS: Sixty-four CHD patients >/= 18 years at first ICD implantation [63% tetralogy of Fallot (TOF) and age at implantation 37 +/- ...
Hayes John J - - 2006
OBJECTIVES: The purpose of this study was to determine whether QRS duration or morphology increased the risk of adverse outcome in the DAVID (Dual Chamber and VVI Implantable Defibrillator) trial. BACKGROUND: The DAVID trial found an increased risk of the combined end point of death and new or worsening congestive ...
Boriani Giuseppe - - 2006
OBJECTIVES: The InSync ICD Registry evaluated patients indicated for cardiac resynchronization therapy with defibrillation. BACKGROUND: Cardiac resynchronization therapy with defibrillation systems are prescribed for both primary and secondary prevention of sudden cardiac death in patients with heart failure with both ischemic and nonischemic etiology. The characterization of ventricular tachyarrhythmias detected ...
Nägele H - - 2006
This report illustrates the case of a patient with an implantable cardioverter defibrillator (ICD) who during physiotherapy with transcutaneous electrical stimulation of the lumbar musculature perceived a shock discharge by the ICD. Analysis of the stored electrogram showed inappropriate therapy due to electromagnetic interference with the external stimulation. Patients as ...
Weigl Manuela - - 2006
To determine the degree of neurocognitive dysfunction after placement of internal cardioverter defibrillators (ICD) and its relationship to the extent of neuronal injury, we studied 42 patients undergoing ICD (n = 21) or pacemaker (PM) insertion (control patients, n = 21). The Mini Mental State Examination, the Trailmaking A test ...
Casella Michela - - 2006
Myotonic dystrophy type 1 (MD1) is the most common muscular dystrophy of adult life. Cardiac involvement is characterized by disorders of atrioventricular conduction, ventricular arrhythmias, and sudden death. Heart rate turbulence (HRT) is a noninvasive risk predictor in patients affected by ischemic heart disease. The aim of our study is ...
Kazemi Babak - - 2006
BACKGROUND: Unexplained syncope is a relatively frequent symptom, mostly caused by a neurocardiogenic reaction. The purpose of this study was to determine predictors of response to head-up tilt testing (HUTT) in patients with unexplained syncope or presyncope. METHODS: HUTT was done in 640 consecutive patients with unexplained syncope or presyncope ...
Soundarraj Dwarakraj D Thoracic and Cardiovascular Institute, Michigan State University, Lansing, Michigan 48910, - - 2006
Inappropriate implantable cardioverter defibrillator (ICD) therapy (IT) is a common complication in patients with ICD. IT is commonly triggered by supraventricular tachycardias (SVT). Dual chamber ICDs (D-ICDs) may distinguish SVT from ventricular tachycardia/ventricular fibrillation better than single chamber ICDs (S-ICDs) and may be associated with a smaller incidence of IT. ...
Brignole Michele - - 2006
AIMS: We prospectively correlated the results of tilt testing (TT) and adenosine triphosphate test (ATP) with the findings observed during a spontaneous syncopal relapse by means of an implantable loop recorder (ILR) in patients with a clinical diagnosis of neurally mediated syncope. METHODS AND RESULTS: We included patients with three ...
Grimm Wolfram - - 2006
AIMS: Antitachycardia pacing (ATP) has not routinely been used in patients who received implantable cardioverter defibrillators (ICDs) for primary prevention of sudden death. This study investigated the efficacy of empirical ATP to terminate rapid ventricular tachycardia (VT) in heart failure patients with prophylactic ICD therapy. METHODS AND RESULTS: Ninety-three patients ...
Geng Deng-Feng - - 2006
OBJECTS: Amiodarone-associated torsade de pointes (Tdp) has been reported increasingly in China in recent years. In this study, we made clinical analysis of amiodarone-associated Tdp in Chinese people. METHODS: Two major Chinese medical databases were searched to identify articles published during the last 26 years that presented data on amiodarone-associated ...
Hatipoglu Osman N - - 2006
The study was prospectively designed to assess the correlation between a new clinical model empirically developed for acute pulmonary embolism (PE) and ventilation/perfusion (V/P) scan results. One hundred sixty consecutive patients with suspected acute PE underwent clinical evaluation before V/P scintigraphy. The clinical probability of PE was categorized according to ...
Sakurai Atsushi - - 2006
AIMS: Therapeutic hypothermia appears to improve the outcome of pre-hospital cardio-pulmonary arrest (CPA) in patients with an initial cardiac rhythm of ventricular fibrillation or nonperfusing ventricular tachycardia (VF/VT). Notwithstanding, the outcome of this procedure is certainly difficult to predict based solely on the initial rhythm. The aim of the present ...
Mainigi Sumeet K - - 2006
BACKGROUND: The biventricular implantable cardioverter-defibrillator (ICD) is an important therapy for select patients with severe heart failure. Given reported risk factors for elevated defibrillation thresholds (DFTs), patients undergoing biventricular ICD placement would be suspected of having a higher incidence of elevated DFT. OBJECTIVES: The purpose of this study was to ...
Kovacs Adrienne H - - 2006
This case study details the multidisciplinary approach to a patient who underwent implantable cardioverter defibrillator (ICD) explantation for psychological reasons. The patient was unable to manage the stress associated with multiple shocks. He had a class I indication for an ICD but initially refused to undergo reimplantation. Treatment included the ...
Chen Lin Y - - 2006
Neurocardiogenic syncope is a neurally mediated disorder and is a common cause of syncope. The goal of treatment is to prevent recurrences with the aim of improving quality of life and reducing morbidity. Reassurance, in some cases, may suffice. In others, augmenting central blood volume by increasing fluid and/or salt ...
Schondorf Ronald - - 2006
In this series of clinical vignettes, the authors have attempted to provide a "feel" for the varied causes of syncope. The neurologist should be able to diagnose most causes of syncope using a simple algorithmic approach. Initial evaluation includes detailed clinical history, physical examination, and 12-lead ECG. Following initial evaluation, ...
Paul Matthias - - 2006
PURPOSE: Idiopathic ventricular fibrillation (IVF) is defined as VF in the absence of any identifiable structural or functional cardiac disease. The underlying pathophysiological mechanisms are unknown. This study was performed to investigate the potential impact of sympathetic dysfunction, assessed by (123)I-meta-iodo-benzylguanidine scintigraphy ((123)I-MIBG SPECT), on the long-term prognosis of patients ...
DiCarlo, Jr., Lorenzo A.
Several studies have reported upon the inducibility of ventricular tachycardia (VT) with programmed ventricular stimulation (PVS) during chronic amiodarone therapy; however, few studies have systematically described and compared the morphology, duration, and cycle length of VT induced by PVS before and after amiodarone. In this study, 26 patients with symptomatic ...
Rosman Jonathan - - 2006
BACKGROUND: The mechanisms underlying the initiation of sustained ventricular tachycardia (VT) have not been fully elucidated. The extent to which reentry, abnormal automaticity, and triggered activity play a role in VT differs depending on the etiology of left ventricular dysfunction. By analyzing electrograms from implantable cardioverter defibrillator (ICD), we sought ...
Delise Pietro - - 2006
Brugada syndrome is associated with a considerable risk of sudden death in young and otherwise healthy adults. The syndrome is estimated to be responsible for at least 4% of all sudden deaths and at least 20% of sudden deaths in patients with structurally normal hearts. The diagnosis of Brugada syndrome ...
Koplan Bruce A - - 2006
BACKGROUND: Cardiac sarcoidosis is a recognized cause of ventricular tachycardia (VT) and sudden death that has not been well studied. OBJECTIVES: The purpose of this study was to describe the clinical characteristics of a consecutive series of eight patients with recurrent monomorphic VT due to cardiac sarcoidosis and to define ...
Pezawas Thomas - - 2006
BACKGROUND: Not all patients with arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) are at risk for sudden cardiac death. The aim of the study was to evaluate the risk stratification in patients with ARVD/C. METHODS AND RESULTS: Programmed ventricular stimulation (PVS) was performed in 34 ARVD/C patients. Twenty-two, 7 and 4 patients ...
Schuger Claudio - - 2006
OBJECTIVES: While defibrillation energy requirements (DERs) have been extensively studied in patients receiving conventional defibrillators, the DERs of patients receiving cardiac resynchronization therapy with defibrillation capability (CRT-D) devices have not been well described. The purpose of this analysis was to characterize DERs (defined as true threshold or the presence of ...
Imaki Ryuta - - 2006
The natural history of asymptomatic individuals with a Brugada-type electrocardiogram (ECG) is still controversial. In this study, we evaluated ventricular fibrillation (VF) inducibility in Brugada-type ECG patients and compared it with other risk factors to clarify the significance of these data on their prognosis. The study population consisted of 38 ...
Marinskis Germanas - - 2006
Amplitude ratios of two adjacent mixed blood oxygen saturation curve peaks in randomly selected strips of ECG were analysed in 32 patients with regular wide-QRS complex tachycardias and 60 control subjects where pacing was performed before ablation of narrow-QRS complex tachycardias. Patients with VT showed different patterns of A-to-V relationships, ...
Brigadeau François - - 2006
AIMS: Insufficient data exists regarding predictors of electrical storms (ES) and clinical outcome in patients treated with an implantable cardioverter defibrillator (ICD). The purpose of this study was to delineate a subgroup of patients likely to experience ES and to determine the impact of ES on mortality in ICD recipients. ...
Kapoor Mukul Chandra - - 2006
OBJECTIVE: To review the anesthetic management for percutaneous transcatheter closure of perimembranous ventricular septal defect (VSD) with an Amplatzer asymmetric occluder device and to highlight the hemodynamic effects and potential complications associated with its delivery. DESIGN: Retrospective review of prospectively collected data. SETTING: University-affiliated teaching hospital. PARTICIPANTS: Nine consecutive children ...
Perennes Alain - - 2006
OBJECTIVES: We sought to evaluate epidemiology, clinical features, and outcomes of patients with syncope and an abnormal response to adenosine triphosphate (ATP). BACKGROUND: Syncope remains of unknown origin in almost 30% of the patients. Injection of ATP induces in some of these patients, but not in control patients, a ventricular ...
Komoda Takeshi - - 2006
The Eurotransplant (ET) allocation algorithm, newly implemented in 2000, gives priority for heart transplantation (HTx) to patients with high urgency (HU) status, but now this status is rescinded upon ventricular assist device (VAD) implantation and only regained if severe complications occur during mechanical circulatory support (MCS). We studied the effects ...
Uzan Laurent - - 2006
BACKGROUND: Amiodarone is a powerful antiarrhythmic drug; however, its use may be complicated by thyrotoxicosis. When this occurs, clinicians must balance the continuation of amiodarone for antiarrhythmic purposes, and the discontinuation of treatment in order to prevent aggravation of the thyrotoxicosis. We studied the consequences of continuation or cessation of ...
Takimoto Yoshiyuki - - 2006
OBJECTIVE: Eating disorders (ED) are thought to be risk factors for sudden death, and arrhythmias are one of the major causes of sudden death in ED patients. Late potentials (LPs) are a predictor of arrhythmias and can be measured using signal-averaged electrocardiography (SAECG). We examined arryhthmogenicity by LPs in ED ...
Brugada P - - 2006
INTRODUCTION: Due to the increasing number of patients with an implantable cardioverter defibrillator (ICD), new options for ICD patient follow-up management are required. METHODS: Patients with ICD indication according to the guidelines received an ICD with Home Monitoring technology. The devices enabled the transmission of the relevant episode, therapy, and ...
Stephenson Elizabeth A - - 2006
INTRODUCTION: In pediatric and congenital heart disease patients, transvenous ICD implantation may be limited secondary to patient size, venous, or cardiac anatomy. Epicardial patches require a thoracotomy, and may lead to a restrictive pericardial process. Because of these issues, we have explored novel ICD configurations. METHODS: Retrospective review at 10 ...
Bogun Frank - - 2006
BACKGROUND: Mapping criteria for hemodynamically tolerated, postinfarction ventricular tachycardia (VT) have been evaluated in only small series of patients. OBJECTIVES: The purpose of this study was to evaluate the utility of various mapping criteria for identifying a critical VT circuit isthmus in a post hoc analysis. METHODS: Ninety VTs (cycle ...
Mitro P - - 2006
OBJECTIVE: To evaluate the role of peripheral serotoninergic system in the pathogenesis of vasovagal syncope. BACKGROUND: Increased central serotoninergic activity was suggested to play a role in sudden inhibition of sympathetic activity responsible for the genesis of vasovagal syncope. There is good correlation between the central serotoninergic activity and the ...
Cesario David A - - 2006
BACKGROUND: Percutaneous epicardial mapping has been used for ablation of recurrent ventricular tachycardia (VT). OBJECTIVES: The purpose of this study was to use a combined epicardial and endocardial mapping strategy to delineate the myocardial substrate for recurrent VT in both ischemic (n = 12) and nonischemic cardiomyopathy (n = 8), ...
Ho Ivan C K - - 2006
BACKGROUND: The first multicenter automatic defibrillator implantation trial (MADIT-I) was a landmark study that identified a significant reduction in mortality among high-risk patients with ischemic cardiomyopathy treated prophylactically with an implantable cardioverter defibrillator (ICD), yet the direct and indirect impact of this trial on clinical practice is unknown. METHODS: We ...
Daubert James P - - 2006
In the Multicenter Automatic Defibrillator Implantation Trial (MADIT) II, implantable cardioverter-defibrillator (ICD)-randomized patients underwent electrophysiologic testing. Both inducible and noninducible patients received an ICD. We correlated inducibility with the occurrence of subsequent ventricular tachycardia (VT) or ventricular fibrillation (VF). Intracardiac ICD electrograms for subsequent events were analyzed to categorize the ...
Ahmed A Razzaque - - 2006
Autoimmune mucocutaneous blistering diseases (AMBD) are an interesting group of rare diseases that affect the mucous membranes and the skin and are frequently or potentially fatal. The clinical presentation is significantly variable, as is the course and prognosis. The immunopathology is well characterized and the target antigens to which the ...
Frustaci Andrea - - 2005
The role of structural heart disease and sodium channel dysfunction in the induction of electrical instability in Brugada syndrome is still debated. We studied 18 consecutive patients (15 males, 3 females; mean age 42.0+/-12.4 years) with clinical phenotype of Brugada syndrome and normal cardiac structure and function on noninvasive examinations. ...
Furushima Hiroshi - - 2005
BACKGROUND: Electrical abnormalities in the RVOT may be involved in Brugada syndrome. OBJECTIVES: We investigated the relationship between the signal-averaged ECG (SAECG) and electrophysiologic study (EPS), especially focusing on conduction delay in the outflow tract of the right ventricle (RVOT) and its contribution to clinical characteristics. METHODS: Twenty-four patients with ...
Hörnsten Rolf - - 2006
We investigated the occurrence of ventricular late potentials (LPs) in patients with familial amyloidotic polyneuropathy (FAP) and the possible association with ventricular arrhythmia on Holter electrocardiography and echocardiographic data. Fifty-five patients and 94 healthy controls were studied. LP were found in 46% of the FAP patients older than 60 years ...
Emmel M - - 2006
The 12-lead electrocardiogram demonstrates noninvasively many details concerning cardiac arrhythmias and their mechanism, but only for a limited period. A Holter system can record heart rhythm for a longer period, but shows 2 or 3 leads only. An ambulatory 12-lead Holter recording system combines the advantages of both. We report ...
Chen Lin Y - - 2005
INTRODUCTION: Our ability to predict a positive electrophysiologic (EP) study in the evaluation of unexplained syncope is suboptimal. AIMS: In patients with unexplained syncope, we defined clinical predictors of bradyarrhythmia and ventricular tachycardia (VT) diagnosed during EP study, constructed diagnostic score indices for bradyarrhythmia and VT, and evaluated the predictive ...
Strano S - - 2005
OBJECTIVES: To describe causes of syncope in outpatients in whom structural heart disease was ruled out as a cause, and to analyse the role of a multidisciplinary approach in a syncope unit for the diagnosis of patients with syncope of unknown origin. METHODS: Cardiovascular autonomic nervous system (ANS) function was ...
Sheldon Robert - - 2006
AIMS: Our goal was to develop historical criteria for the diagnosis of vasovagal syncope. METHODS AND RESULTS: We administered a 118-item historical questionnaire to 418 patients with syncope and no apparent structural heart disease. The prevalence of each item was compared between patients with positive tilt tests and those with ...
Elhendy Abdou - - 2005
OBJECTIVES: We sought to assess the relation between myocardial ischemia during stress echocardiography and major events in patients with implantable cardioverter-defibrillator (ICD). BACKGROUND: The association of myocardial ischemia with subsequent ICD therapy and mortality is unknown. METHODS: We studied 90 patients (age 65 +/- 13 years, 27 women) with history ...
< 1 2 3 4 5 6 7 8 9 10 11 >