the effect of sympathetic stimulation on responses to programmed ventricular stimulation was studied in dogs without myocardial infarction ( group i : n = 5 ) , with transmural anterior wall myocardial infarction ( group ii : n = 6 ) and with nontransmural anterior wall myocardial infarction ( group iii : n = 9 ) .
C0027051
myocardial infarction
C0340293
anterior