Search Results
Results 51 - 100 of 1351
1 2 3 4 5 6 7 8 9 10 >
Xiao Hua - - 2011
Calcium channel plays an important role in the autoimmune pathogenesis of idiopathic dilated cardiomyopathy (DCM). Autoantibodies have emerged as a new upstream target of sudden death in DCM. We sought to validate the hypothesis that autoantibodies against l-type calcium channel (CC-AAbs) are arrhythmogenic and lead to sudden death in patients ...
Chase Paul - - 2010
Peak oxygen consumption derived from cardiopulmonary exercise (CPX) testing provides important prognostic information in patients with heart failure (HF). The oxygen consumption at the ventilatory threshold (VT) has also been shown to be prognostic. However, the VT cannot always be detected in patients with HF. Other variables such as the ...
Thiagarajah Prashan H - - 2010
Syncope is a common complaint that is frequently evaluated without identifying a precipitating cause. Gelastic (laughter-induced) syncope is an uncommon and poorly understood condition. We describe 3 patients who experienced loss of consciousness during vigorous laughter. Each patient had an extensive medical evaluation, including a comprehensive history and physical examination, ...
Moltedo Jose M - - 2011
The data on the efficacy of atenolol for long-QT syndrome (LQTS) are controversial. This study aimed to evaluate the efficacy of atenolol for pediatric patients with LQTS. A retrospective observational study investigating all patients who had LQTS treated with atenolol at two institutions was performed. The study identified 57 patients ...
Joo Eun Yeon - - 2011
The aim of this study is to investigate regional cerebral blood flow (rCBF) in patients with syncope. We compared brain single photon emission computed tomography (SPECT) images of neurally mediated syncope patients with those of age/sex matched healthy volunteers. (99m)Tc-ethylcysteinate dimer (ECD) brain SPECT was performed in 35 patients (M/F = 17/18, ...
Zyśko Dorota - - 2010
We report a case of a 55 year-old man with a history of vasovagal syncope who experienced six unexpected syncopal events over the course of two hours. Two of these occurred in the supine position during ECG monitoring, which showed a long-lasting sinus pause. Before the last syncopal episode, the ...
Kanjwal Khalil - - 2010
Disturbances in autonomic nervous system function have been reported to occur in patients suffering from mitochondrial cytopathies. However, there is paucity of literature on the occurrence of orthostatic intolerance (OI) in these patients. We report on a series of patients diagnosed with mitochondrial cytopathy who developed features of autonomic dysfunction ...
Guida Pietro - - 2010
To compare head-up tilt testing (HUT) outcomes and hemodynamic responses, and the prevalence and correlates of prodromes, in elderly and younger patients with suspected vasovagal syncope (VVS). Consecutive outpatients with a history of recurrent unexplained syncope underwent HUT by being tilted to 70°; the test was potentiated by the administration ...
Sterliński Maciej - - 2010
Transvenous implantable cardioverter-defibrillators (ICD) have been implanted in Poland since 1995. As the method spreads it is important to consider its long-term benefits and disadvantages. To assess survival, efficacy and complication rate in ICD patients, who received the device more than ten years earlier. Retrospective analysis of 60 ICD patients ...
Razak Eathar - - 2010
The prophylactic use of the implantable cardioverter-defibrillator (ICD) has been shown to decrease mortality in patients with depressed left ventricular ejection function (LVEF ≤ 35%). Whether this beneficial effect persists in the presence of chronic obstructive pulmonary disease (COPD) is not established. We examined the medical records of patients with ...
Kühne Michael - - 2010
In patients with prior infarction, isolated potentials (IPs) during sinus rhythm reflect fixed scar and often indicate sites critical for ventricular tachycardia (VT). The purpose of this study was to determine the value of IPs in conjunction with pace-mapping to guide VT ablation in patients with various types of nonischemic ...
Lai Wei-Ting - - 2010
BACKGROUND/PURPOSE: We investigated the application of head-up tilt table testing (HUT) and management of neurocardiogenic syncope (NCS) in children, as pediatric studies are limited. METHODS: Seventy-nine patients (ages 6-18 years) underwent HUT for evaluation of syncope. Patient triggers and premonitory symptoms allowed the clinical diagnosis of NCS or non-NCS. Results ...
Inada Keiichi - - 2011
VT Ablation in Apical Hypertrophic Cardiomyopathy. Introduction: Monomorphic ventricular tachycardia (VT) is uncommon in apical hypertrophic cardiomyopathy (HCM). The purpose of this study was to define the substrate and role of catheter ablation for VT in apical HCM. Methods: Four patients with apical HCM and frequent, drug refractory VT (mean age ...
Chen Shi-Lun - - 2010
The aim of this Phase II study was to determine the efficacy and safety of combined bortezomib and thalidomide (VT) regime as initial treatment for newly diagnosed patients with multiple myeloma (MM) in China. Thirty-four patients have been enrolled in this study and were planned to receive VT regime up ...
Schmidt Boris - - 2010
The substrate of myocardial ventricular tachycardia (VT) may involve the subepicardial myocardium. The purpose of this study was to assess the incidence of epicardial substrates in patients with a previously failed endocardial ablation attempt for VT as well as the safety and effectiveness of epicardial ablation. Using an electroanatomic mapping ...
Takigawa Masateru - - 2010
Electrical storm (ES) is a serious problem in patients with an implantable cardioverter defibrillator (ICD). However, insufficient reports have indicated the predictors of ES in ICD patients with idiopathic dilated cardiomyopathy (DCM). The purpose of this study was to clarify the predictors of ES for risk stratification in DCM patients ...
Riley Michael P - - 2010
The endocardial substrate for ventricular arrhythmias in patients with arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is thought to be caused by a progressive degenerative process. Many clinical decisions and treatment plans are guided by this pathophysiologic assumption, but the extent of progression of macroscopic endocardial scar and right ventricular (RV) dilatation ...
Pokushalov Evgeny - - 2010
Despite the high efficacy of catheter ablation of ventricular tachycardia (VT) in patients with arrhythmogenic right ventricular dysplasia (ARVD), in some patients, conventional endocardial ablation is ineffective. These failures could be explained by the presence of epicardial arrhythmogenic substrate. In these cases, a percutaneous epicardial ablation may be required. This ...
Fedorowski Artur - - 2010
To investigate whether a systematic approach to unexplained syncopal attacks based on the European Society of Cardiology guidelines would improve the diagnostic and therapeutic outcomes. Patients presenting with transient loss of consciousness to the Emergency Department of Skåne University Hospital in Malmö were registered by triage staff. Those with established ...
Kobza Richard - - 2010
Patients with left ventricular noncompaction (LVNC) have an increased risk for life-threatening ventricular arrhythmias. The benefit from implantable cardioverter-defibrillators (ICD) in these patients has been investigated only in small series. Therefore, the aim of the present study was to analyze the clinical outcome of a larger population of patients with ...
Santangeli Pasquale - - 2010
Management of ventricular tachycardia (VT) in patients with hypertrophic cardiomyopathy (HCM) is challenging. The purpose of this study is to assess the value of radiofrequency catheter ablation (RFCA) for the treatment of the VTs in the setting of HCM. Twenty-two patients (18 with ICD) with HCM and multiple episodes of ...
Bourke Tara - - 2010
Reducing sympathetic output to the heart from the neuraxis can protect against ventricular arrhythmias. The purpose of this study was to assess the value of thoracic epidural anesthesia (TEA) and left cardiac sympathetic denervation (LCSD) in the management of ventricular arrhythmias in patients with structural heart disease. Clinical data of ...
Lim Hoong Sern - - 2010
Ventricular fibrillation (VF) induced by different modes of induction may have different characteristics and defibrillation thresholds. This study compares the cycle lengths and defibrillation of VF induced by direct current (DC) pulses vs 50 Hz. We compared induction by DC pulses and 50-Hz pacing in this single-centre observational study of 259 ...
Humm A M - - 2010
BACKGROUND AND PURPOSE: Carotid sinus massage (CSM) is commonly used to identify carotid sinus hypersensitivity (CSH) as a possible cause for syncope, especially in older patients. However, CSM itself could provoke classical vasovagal syncope (VVS) in pre disposed subjects. METHODS: Retrospective analysis of CSM, cardiovascular autonomic function tests (including tilt ...
Faheem Osman - - 2010
We report a series of three patients whose implantable cardioverter-defibrillators (ICD) implants were unsuccessful due to inability to achieve defibrillation thresholds (DFT) at maximum available energy after failure of standard modification and enhancement procedures. All patients had advanced cardiomyopathy. Use of the coronary sinus (CS) for left ventricular (LV) shocking ...
Rao Rohit P - - 2010
Syncope is transient loss of consciousness. Neurocardiogenic syncope (NCS) is the most common cause of syncope. Head-up tilt-table test (HUTT) has been used to demonstrate physiologic events during graded orthostatic challenge in individuals with significant handicap from NCS. Near-infrared spectroscopy (NIRS) provides a noninvasive, continuous method to monitor trends of ...
Sánchez-Muñoz Juan José - - 2010
Episodes ventricular fibrillation (VF) initiated by ventricular premature complexes (VPCs) of a single morphology have been reported. However, the characteristics of the VPCs over long periods of time are unknown. To compare the morphologies and coupling intervals of VPCs that initiate episodes of VF that occur at different time periods. ...
Ashino Sonoko - - 2010
Although patients with Brugada syndrome (BS) are at risk of ventricular fibrillation (VF) and ensuing death, the action potential duration (APD) restitution properties of the right ventricular outflow tract (RVOT) in patients with BS remain undetermined. Endocardial monophasic action potentials (MAPs) were obtained from 16 patients with BS and 17 ...
Rodrigues Thiago da Rocha Tda - - 2010
Patients with loss of consciousness and convulsion often have the diagnosis of epilepsy despite normal electroencephalograms (EEGs). To evaluate the proportion of patients referred to neurologists with presumed epilepsy and normal EEGs who have an alternative cause of syncope. It was a cross-sectional study of 55 consecutive patients aged 6-85 ...
Viana-Tejedor Ana - - 2010
INTRODUCTION AND OBJECTIVES: The implantable cardioverter-defibrillator (ICD) is a well-recognized means of providing effective treatment for patients with ventricular tachycardia (VT) and structural heart disease. However, the benefits of these devices in patients with limited life-expectancy have been questioned. Moreover, the long-term efficacy of catheter ablation of VT in this ...
Kostopoulou Anna - - 2010
INTRODUCTION: The aim of this study was to examine autonomic disorders in patients with Brugada syndrome by performing a cardiac sympathetic innervation evaluation, a head-up tilt-test (HUT) and heart rate variability (HRV) analysis. METHODS AND RESULTS: We enrolled 20 patients with Brugada syndrome (mean age 42.5 +/- 8.8 years), 9 ...
Gunderson Bruce D - - 2010
Implantable cardioverter-defibrillator (ICD) ventricular oversensing may result in inappropriate therapy, which may be triggered by lead/connection issues that require surgical revision or physiologic oversensing that may be resolved with reprogramming. The sensing integrity counter (SIC) is an oversensing diagnostic that increments for very rapid ventricular intervals < or =130 ms. ...
Cheema Aamir - - 2010
Incidence of sudden cardiac death (SCD) in end-stage renal disease (ESRD) remains high. Limited data is available about whether implantable cardioverter-defibrillators (ICDs) can prevent arrhythmic death in patients with chronic kidney disease (CKD). The purpose of this retrospective study was to determine the impact of CKD on all-cause and sudden ...
Stöllberger C - - 2010
Arrhythmias in left ventricular hypertrabeculation/noncompaction (LVHT) comprise sustained or non-sustained ventricular tachycardia (VT) (n=135), atrial fibrillation (AF) (n=96) AV block (n=55) and QT prolongation (n=47). The prevalence differs between children and adults. In children most frequent are WPW-syndrome (n=24), AV block (n=24), VT (n=17) and bradycardia (n=15). In adults most ...
Bonny Aimé - - 2010
Background. The relationship between C-reactive protein (CRP) elevation and ventricular tachycardia (VT) in arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is unclear. Methods and Results. In 91 consecutive patients with either ARVD/C with or without VT (cases) or idiopathic right ventricular outflow tract (RVOT) tachycardia (controls), blood sampling were taken to determine ...
Fluechter Stephan - - 2010
Myocardial fibrosis is frequently identified in patients with hypertrophic cardiomyopathy (HCM). The aim of this study was to investigate the role of myocardial fibrosis detected by late gadolinium-enhancement (LGE) cardiovascular magnetic resonance (CMR) as a potential arrhythmogenic substrate in HCM. We hypothesized that the extent of LGE might be associated ...
Priya Manopriya T - - 2010
It was reported that C-reactive protein (CRP) levels increase in parallel with the progression of chronic liver diseases, such as chronic hepatitis and liver cirrhosis. Inflammatory markers, such as high sensitive C-reactive protein (hsCRP), ferritin, transferrin, albumin, alpha-1 acid glycoprotein (AAG), alpha-2 macroglobulin (AMG), alpha-1 anti-trypsin (AAT) and lipoprotein a ...
Frances Raul J - - 2010
Identification of late potentials requires the reduction of random noise by signal averaging. The importance of using a very low noise level (NL) as the end point of the averaging process in patients with ventricular tachycardia, the variation of results when a lower than standard NL was used and the ...
Carballada F J - - 2010
Immunoglobulin (Ig) E-mediated sensitization to N-glycans (cross-reactive carbohydrate determinants, CCDs) may induce double IgE reactivity to honeybee venom (HBV) and yellow jacket venom (YJV) in patients who are monosensitized to either of these venoms. Alcohol consumption is associated with increased IgE levels and possibly with sensitization to CCDs in the ...
Jiménez-Candil Javier J Arrhythmias Unit, Cardiology Department, University Hospital, Salamanca, Spain. - - 2010
In implantable cardioverter-defibrillators (ICD) patients, the duration of the basal QRS complex (QRSd) is not associated with a greater risk of developing ventricular tachyarrhythmias. QRSd could be inversely related to the effectiveness of antitachycardia pacing (ATP) because it may be associated with longer conduction times of the paced-impulses and hence, ...
Lim Hoong Sern - - 2010
BACKGROUND: Antitachycardia pacing (ATP) is an effective treatment of ventricular tachycardia (VT). However, persistent failure of ATP in some patients is well recognized. METHODS: A method of deriving the local activation time from stored intracardiac electrograms in implantable cardioverter defibrillators is described. Using a case-control design, the local activation times ...
Dorosz Jennifer L - - 2009
BACKGROUND: Current guidelines for the use of implantable cardioverter-defibrillators (ICDs) are broad and significantly increase the cost of caring for patients with heart failure. In an effort to identify the specific subset of patients who benefit from this therapy, the predictive value of numerous echocardiographic parameters have been studied. Severe ...
Coelho Marlos de Souza Mde - - 2009
BACKGROUND: The use of endoscopic sympathetic blockade (ESB) in the treatment of axillary hyperhidrosis has grown because of its potential reversibility. But it is still not clear whether the rates of success, compensatory sweating, and satisfaction are better than those accomplished with video thoracoscopic sympathectomy (VTS). METHODS: Eighty-four patients were ...
Pappone Carlo - - 2009
To evaluate the prevalence, clinical significance, and prognosis of latent Brugada syndrome (BrS) in patients with new-onset atrial fibrillation (AF) unmasked by class 1C antiarrhythmic drugs. Between January 2000 and June 2008, all consecutive patients with new-onset AF, who after flecainide exhibited typical Brugada ECG pattern, underwent electrophysiologic, pharmacologic, and ...
Schaer B - - 2009
Contemporary guidelines refer to ICD implantation in patients who experienced ventricular tachycardia or fibrillation as secondary prevention, and in well-defined high risk groups as primary prevention. Randomised studies were performed in patients with coronary artery disease and in non-ischaemic cardiopathies, chiefly dilated cardiomyopathy. After four years' follow-up the absolute risk ...
Turk Ugur - - 2010
BACKGROUND: The determination of early, accurate, predictive criteria for a positive result would permit a reduction in the duration of the head-up tilt testing (HUTT). Previous studies propounded that existence of early sympathetic overreactivity (rapid and sustained increase in heart rate) during HUTT predicts positive result. However, the exact value ...
Huang X - - 2009
This cross-sectional, retrospective study was designed to evaluate the current clinical applications and acute hepatotoxicity of intravenous amiodarone administration at a hospital in China. Clinical data were collected from 1214 patients receiving intravenous amiodarone treatment between October 2003 and September 2005. Baseline patient characteristics, drug indications, administration records and acute ...
Carbucicchio Corrado - - 2009
BACKGROUND AND PURPOSE: In patients with severe cardiomyopathy, recurrent episodes of nontolerated ventricular tachycardia (VT) or electrical storm (ES) frequently cause acute heart failure and cardiac death; the suppression of the arrhythmia is therefore lifesaving, but feasibility of catheter ablation (CA) is precluded by the adverse hemodynamic conditions together with ...
Irfan Ghazala - - 2009
OBJECTIVE: To determine association between patient's symptoms and incidence of arrhythmia on 24-hour electrocardiographic Holter monitoring. STUDY DESIGN: A cross-sectional descriptive study. PLACE AND DURATION OF STUDY: The Cardiology Department, Liaquat National Hospital, Karachi, from January to June 2007. METHODOLOGY: Patients above 15 years of age, of either gender, referred ...
Nam Gi-Byoung - - 2010
The aim of the present study was to identify specific electrocardiogram (ECG) features that predict the development of multiple episodes of ventricular fibrillation (VF) in patients with an early repolarization (ER) pattern and to compare the mode of VF initiation with that observed in typical cases of Brugada syndrome (BrS). ...
1 2 3 4 5 6 7 8 9 10 >