The objective was to determine how patients are selected for invasive investigation after myocardial infarction in Scotland. Cardiologists in Scotland were surveyed by postal questionnaire asking them to detail their approach to four sample clinical scenarios. Complete responses were obtained from 82% of those surveyed. Substantial differences in practice were observed in the management of subjects with non-Q wave myocardial infarction. Of the cardiologists surveyed 40% would undertake coronary angiography irrespective of the results of non-invasive testing in a 45 year old patient, but only one would adopt the same policy in an otherwise fit 77 year old. Only 44% would perform any investigations (beyond echocardiography) in the 77 year old. A minority of respondents felt that their practice was influenced by resource limitation. Considerable variation continues to exist in the approach to risk stratification after myocardial infarction for some groups of patients. This variation may occur principally as a consequence of physician preference.