Abstract
Two cases which exhibited a Wenckebach form of exit conduction between an electrical pacemaker and the ventricular myocardium are presented. This manifests with increasing latency (stimulus to QRSintervals) and ultimate stimulus failure (block). The cycle then repeats itself. The QRS duration also increases progressively within each cycle. The phenomenon connotes an adverse prognosis. Several postulates regarding the mechanism are discussed.
Original language | English |
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Pages (from-to) | 961-965 |
Number of pages | 5 |
Journal | Heart |
Volume | 38 |
Issue number | 9 |
DOIs | |
State | Published - 1976 |