نتایج جستجو برای: av
تعداد نتایج: 14715 فیلتر نتایج به سال:
OBJECTIVES The purpose of this study was to test the hypothesis that cardiac-directed expression of adenylyl cyclase VI (AC(VI)) facilitates atrioventricular (AV) nodal conduction. BACKGROUND Cardiac-directed expression of AC(VI), unlike other strategies to increase cyclic adenosine monophosphate generation, reduces mortality in murine cardiomyopathy. Recent reports suggest that AC(VI) expres...
OBJECTIVES The purpose of this study was to determine if AV delay optimization with continuous-wave Doppler aortic velocity-time integral (VTI) is clinically superior to an empiric program in patients treated with cardiac resynchronization therapy (CRT) for severe heart failure. BACKGROUND The impact of AV delay programming on clinical outcomes associated with CRT is unknown. METHODS A rand...
The hypothesis that human atrioventricular (AV) nodal function can be modulated selectively with a new technique of AV nodal artery catheterization was tested in eight subjects referred for diagnostic cardiac catheterization or electrophysiological studies. Three patients had no history of arrhythmias. Three patients had supraventricular tachycardia (SVT) due to reentry confined to the AV node ...
UNLABELLED Conduction defect caused by lamin A/C gene mutation. INTRODUCTION Mutations of lamin A/C gene (LMNA) cause dilated cardiomyopathy (DCM) with atrioventricular (AV) conduction defect, although the electrophysiological and histological profiles are not fully understood. METHODS AND RESULTS We analyzed a large Japanese family (21 affected and 203 unaffected members) of DCM with AV bl...
THE ELECTROPHYSIOLOGIC EFFECTS of adenosine and other adenine derivatives were first described by Drury and Szent-Gyorgyi in 1929.' These investigators clearly demonstrated that intravenous administration of adenosine produced a decrease in sinus rate and transient atrioventricular (AV) block. Adenosine is a mediator of many physiologic phenomena and most of the interest in its effects on the c...
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