electrocardiographic and vectorcardiographic studies revealed a severe intraventricular conduction disturbance that coincided with histologic changes in the myocardial tissue , including profuse interstitial fibrosis , hypertrophy and degeneration of the myocardial fibers , aberrant arrangement of the muscular fibers and considerable alteration of the structure of cardiac tissue .
C0027061
myocardial tissue
C0018787
structure