data from the initial examination in a large prospective study of cardiovascular disease in middle aged men ( the british regional heart study ) were used to separate 7710 men into three groups on the basis of a resting electrocardiogram , a standardised chest pain questionnaire , and recall of a doctor 's diagnosis of angina or of a previous heart attack : ( group 1 ) no evidence of ischaemic heart disease ( 75 % ) , ( group 2 ) evidence of ischaemic heart disease short of a definite myocardial infarction ( 20 % ) , ( group 3 ) definite myocardial infarction ( 6 % ) .
C0008031
chest pain
C0002962
angina