ELECTROCARDIOGRAPHY STUDIES IN VARIOUS LOCATIONS OF MYOCARDIAL INFARCTIONS IN DOGS
Abstract
Differences among electrocardiograms in myocardial infarctions at various locations have been observed. When studying these electrocardiograms, alterations of rhythms and cardiac conduction, tachycardia around 200-210 beats/min twelve hours after occlusion are shown. Voltages of waves were high. The important facts were S-T segment alterations, pathologica T waves and profund Q waves. In group I, premature ventricular extrasyxtole and VPC complex ocurred as well as intra-infarction and peri-infarction block. These arrhythmias continued up to 24 hours and even 48 hours following the infarction. In group 2 it was observed during the first hours arrytmias like those of group I but more slight, and these dissappeared after 24 hours following the infarction. In group 3 atrial fibrillations were observed during the first hours. Almost no cases of ventricular extrasyxtole were found.Downloads
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