TY - JOUR
T1 - Re-entry near the site of the ventricular parasystolic focus
T2 - An ECG study of patients with artificial ventricular pacemakers
AU - Surawicz, Borys
AU - Kuo, Chien Suu
AU - Reddy, C. Pratap
PY - 1980
Y1 - 1980
N2 - Morphology of ventricular ectopic complexes was examined in 1,746 ECGs of 149 patients with permanent ventricular pacemakers. In 20 of 80 patients (25%) the morphology of ventricular ectopic complexes was similar to that of the paced complex. This resulted in a ventricular couplet where the spontaneous premature complex originated at the site of pacing, possibly due to local re-entry. Repeated re-entry (two ventricular ectopic complexes in a row) occurred only in one of these patients, and none had ventricular tachycardia. These observations 1) verify the existence of a mechanism which we have postulated in explaining the association between couplets and ventricular parasystole, and 2) confirm the rare occurrence of repeated reentry in such a setting. Other observations in this study show that premature stimulation during right ventricular pacing may alter morphology of the ventricular complex from a left to right bundle branch block pattern in some leads.
AB - Morphology of ventricular ectopic complexes was examined in 1,746 ECGs of 149 patients with permanent ventricular pacemakers. In 20 of 80 patients (25%) the morphology of ventricular ectopic complexes was similar to that of the paced complex. This resulted in a ventricular couplet where the spontaneous premature complex originated at the site of pacing, possibly due to local re-entry. Repeated re-entry (two ventricular ectopic complexes in a row) occurred only in one of these patients, and none had ventricular tachycardia. These observations 1) verify the existence of a mechanism which we have postulated in explaining the association between couplets and ventricular parasystole, and 2) confirm the rare occurrence of repeated reentry in such a setting. Other observations in this study show that premature stimulation during right ventricular pacing may alter morphology of the ventricular complex from a left to right bundle branch block pattern in some leads.
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U2 - 10.1016/S0022-0736(80)80039-2
DO - 10.1016/S0022-0736(80)80039-2
M3 - Article
C2 - 7365350
AN - SCOPUS:0018888325
SN - 0022-0736
VL - 13
SP - 103
EP - 107
JO - Journal of Electrocardiology
JF - Journal of Electrocardiology
IS - 2
ER -