it has been shown on rats preadapted to hypoxia in an altitude chamber that myocardial infarction induced by ligation of the coronary artery was accompanied by less disturbances in the electrical stability of the heart , namely by a twofold decrease in ventricular fibrillation threshold and a considerable decrease in the heart ectopic activity .
C0027051
myocardial infarction
C0018787
heart