therefore , the same orthogonal ecgs were analyzed in the frequency domain ( blackman-harris window ) and the time domain after signal averaging and high gain , low noise amplification ( 0 to 300 hz ) in 30 patients with sustained ventricular tachycardia after myocardial infarction , 15 patients without ventricular tachycardia after infarction and 15 healthy subjects .
C0027051
myocardial infarction
C0021308
infarction