we conclude that broad low-amplitude electrograms in vivo and in vitro depict local areas of slow and/or discontinuous conduction , that the intrinsic asymmetry of cardiac activation due to fiber orientation is accentuated by infarction and may predispose to intraventricular reentry , and that intraventricular reentrant circuits that may be present on the epicardial surface may persist in a volume of myocardial tissue as small as 0.5 cc .
C0018787
cardiac
C0027061
myocardial tissue