Begun in June, 1971 and completed in October 1973, the study had the following specific goals: to define the cardiologist's role; to determine cardiology training program objectives; to determine manpower needs for cardiologists; and to determine the educational needs of cardiologists. The major information was sought from all active cardiologists and all cardiology training programs in the United States and employed the use of questionnaires, log-diaries, content analysis, and interviews. The data furnishes an estimate of present and future manpower needs for cardiologists in the fields of patient care, teaching, and research within the United States. It also provides a description of the current practice of cardiology and identifies deficiencies in existing training programs in cardiology. Further, the study projects the future activities of the cardiologist, an aid in planning future training experiences for them. Contributors to the study include: W. H. Abelmann, S. Abrahamson, F. H. Adams, N. O. Fowler, P. L. Frommer, R. W. Gifford, Jr., R. A. Girard, W. P. Harvey, H. N. Hultgren, F. Y. K. Lau, H. D. McIntosh, R. C. Mendenhall, W. D. Nelligan, W. H. Pritchard, A. Soffer, and H. J. C. Swan. (MW)