نتایج جستجو برای: ventricular fibrillation
تعداد نتایج: 191527 فیلتر نتایج به سال:
BACKGROUND Arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) is a condition associated with the risk of sudden death (SD). METHODS AND RESULTS We conducted a multicenter study of the impact of the implantable cardioverter-defibrillator (ICD) for prevention of SD in 132 patients (93 males and 39 females, age 40+/-15 years) with ARVC/D. Implant indications were a history of car...
The pathophysiology of the ventricular fibrillation that complicates digitalis intoxication was investigated. In this and other calcium-overload states, oscillations of the intracellular free calcium concentration ([Ca2+]i) have been implicated as the cause of ventricular tachyarrhythmias. We addressed two questions: 1) Are [Ca2+]i oscillations obligatory in the pathogenesis of ventricular fibr...
Response to Letter Regarding Article, “Early Repolarization Is an Independent Predictor of Occurrences of Ventricular Fibrillation in the Very Early Phase of Acute Myocardial Infarctions” We thank Drs Hayashi and Horie for their comments with regard to our recently published article. Previous reports demonstrated that cardiovascular drugs and heart rate can potentially alter the presence early ...
We describe the case of a patient with long QT syndrome and recurrent ventricular fibrillation, triggered by premature ventricular complexes (PVCs) with a left bundle branch block pattern and inferior axis of the QRS. Activation mapping demonstrated the origin of the PVCs to be in the right ventricular outflow tract. Ventricular fibrillation (VF) was successfully treated by catheter ablation of...
OBJECTIVE In the absence of an obvious cause for cardiac arrest, patients with idiopathic ventricular fibrillation are difficult to manage. A subset of patients has inducible arrhythmias. In others sympathetic excitation plays a role in the onset of the cardiac arrest. This study evaluates a prospective stepped care approach in the management of idiopathic ventricular fibrillation, with therapy...
background: alcohol consumption has multiple side effects on heart which can be divided to six subgroups: heavy alcohol drinkers (80 g/day alcohol consumption) are most susceptible to cardiac complications. the aim of this study was to review alcohol side effects on heart and two present two alcoholic patients with alcoholic cardiomyopathy. case report: case a: a 52 year-old man presented with ...
The multicenter randomized study of the Gruppo Italiano per lo Studio della Streptochinasi nell'Infarto Miocardico has provided the opportunity to analyze the impact of thrombolytic treatment on secondary ventricular fibrillation incidence in a large population of patients (11,712) with acute myocardial infarction. A reduction of about 20% in the frequency of secondary ventricular fibrillation ...
BACKGROUND Early countershock of ventricular fibrillation has been shown to improve immediate and long-term outcome of cardiac arrest. However, a number of investigations in the laboratory and in the clinical population indicate that immediate countershock of prolonged ventricular fibrillation most commonly is followed by asystole or a nonperfusing spontaneous cardiac rhythm, neither of which r...
Stein, Kenneth M., Jeff Walden, Neal Lippman, and Bruce B. Lerman. Ventricular response in atrial fibrillation: random or deterministic? Am. J. Physiol. 277 (Heart Circ. Physiol. 46): H452–H458, 1999.—The ventricular response in atrial fibrillation is often described as ‘‘chaotic,’’ but this has not been demonstrated in the strict mathematical sense. A defining feature of chaotic systems is sen...
The role of supraventricular extrasystoles in the initiation of ventricular arrhythmia was studied in 72 consecutive patients who developed primary ventricular fibrillation during the acute phase of myocardial infarction. In six patients (8%), a total of 12 episodes of ventricular fibrillation and 16 episodes of ventricular tachycardia were initiated by supraventricular extrasystoles. Ventricul...
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