The Type A behavior pattern (TABP), a complex of personality traits characterized by insecurity of status, hyperaggressiveness, sense of time urgency, free-floating hostility, and a tendency toward self-destruction, has been linked to coronary heart disease in both prospective and clinical studies. Attempts to modify the TABP are complicated by conceptual understandings of the behavioral complex. However, intervention studies, such as the San Francisco Recurrent Coronary Prevention Project, have shown that modification is possible. Both psychological and religious factors need to be taken into consideration when exploring the modification of the TABP.