Affiliation:
1. From the Baragwanath Hospital, Johannesburg, South Africa, and the Tampa General Hospital, Tampa, Florida.
Abstract
Evidence is presented for the new concept that ventricular extrasystoles can be "concealed," i.e., that the extrasystolic focus may be discharged without its impulse invading the surrounding myocardium, as in the "exit block" of parasystole.
Concealed bigeminy
is recognized when only odd numbers of sinus beats intervene between consecutive extrasystoles.
Concealed trigeminy
is recognizable when a multiple of 3 plus 2, i.e., 5, 8, 11, 14, etc., sinus beats invariably occupy the interectopic intervals. These concealed extrasystolic rhythms are illustrated and discussed.
A genetic relationship between ventricular bigeminy and parasystole is reaffirmed.
Publisher
Ovid Technologies (Wolters Kluwer Health)
Subject
Physiology (medical),Cardiology and Cardiovascular Medicine
Cited by
77 articles.
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