Analogy of Electronic Pacemaker and Ventricular Parasystole with Observations on Refractory Period, Supernormal Phase, and Synchronization
نویسندگان
چکیده
منابع مشابه
Analogy of electronic pacemaker and ventricular parasystole with observations on refractory period, supernormal phase, and synchronization.
THE INTRODUCTION of electronic (artificial) pacemakers in the management of patients with transient and permanent coin-plete heart block has met with outstanding success. Miniaturization has in turn given rise to small portable units and to smaller implantable onles. With the latter, the stimulus is standardized and in most types the rate (cycle) is preset and nonadjustable. As yet, there seems...
متن کاملVentricular parasystole following implantation of an electronic pacemaker unit.
ince the introduction of electronic pacemakers, S a number of previously unencountered arrhythmias are now seen freq~ently.'.~ Among those more commonly observed is &cia1 ventricular parasystole which occurs when normal A-V conduction is resumed in patients with k e d rate pacemaker units.8 Spontaneous ventricular parasystole is occasionally encountered in patients with supraventricular mechani...
متن کاملDouble irregular ventricular parasystole: rate-dependent entrance block and "supernormal" exit conduction.
An analysis of electrocardiograms from a patient with spontaneous double irregular ventricular parasystole is presented. Irregularity in one of the two parasystoles was produced by intermittence based on rate-dependent (phase 3) entrance block, and in the other parasystole it was attributed to "supernormal" exist conduction. Critical analysis of electrocardiograms revealed that first degree blo...
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ژورنال
عنوان ژورنال: Circulation
سال: 1963
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.27.5.878