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The ventricular premature contraction. Its place in the diagnosis of ischemic heart disease

1963; Elsevier BV; Volume: 65; Issue: 3 Linguagem: Inglês

10.1016/0002-8703(63)90007-3

1097-6744

Alberto Benchimol, James E. Lasry, Fernando R. Carvalho,

Cardiac Imaging and Diagnostics

Since acute myocardial infarction involves a progressive disturbance of intramyocardial propagation the process might be regarded as a conduction disturbance: incomplete in the evolving phase; complete with Q wave inscription. Premature atrial excitation (PAE) can induce fascicular or bundle branch conduction delay, or complete functional block. Considered here are the concepts of foretaste: in which PAE reveals the infarct Q before it has appeared in regular sinus beats, and aftertaste: in which, following the healing of the myocardial infarction, the Q wave is recalled by PAE after it has disappeared from regular beats. Foretaste was observed in a small number of acutely infarcted dogs. Aftertaste is substantially more problematic since Q wave inscription is known to occur, however uncommonly, in a small minority of noninfarcted aberration morphologies. Only lateral infarct Q waves appear to be recallable by PAE.