group a , 836 patients without a previous mi showing exercise-induced myocardial ischaemia associated with st-segment depression -- group b , 72 patients without a previous mi and exercise-induced st-segment elevation -- group c , 50 patients survivors of a recent ( 1 month ) mi and exercise-induced st-segment depression -- group d , 580 patients with an old mi ( greater than 3 months ) and a positive exercise test associated with st-segment depression .
C0021308
mi
C0027051
mi