The improvement of the survival of cardiac patients may cause an impairment of their quality of life. At present, the study of the quality of life of the patients and its changes, must be considered as one of the aims of the Medicine. This study must be comprised clinical, functional, intellectual, social, and labor aspects, and all the items related to the environment of the patient. The first questionnaires used for the study of quality of life were generic but later on, specific questionnaires for different pathologies were found to be preferential. At present, there are questionnaires for hypertensive, myocardial infarction, angina and heart failure patients, and among them the questionnaire for myocardial infarction patients, structures and validated by the authors which has been used to study the quality of life postinfarction patients who followed a cardiac rehabilitation programme.