[Pathology of the heart transplant].

The endomyocardial biopsy is the best diagnostic procedure of the rejection in the cardiac transplant. In this paper we analize the more frequent findings observed in the biopsies and in the dead patient's hearts after a transplant. Due to the fact that the rejection' lesions have a focal distribution the biopsy has to contain at least four fragments. The diagnostic criteria for rejection was stablished since 1990. There are other lesions that can suppose a problem being the most frequent the ischemia, the infectious miocarditis and the Quilty effect. The post mortem studies permit the diagnostic of vascular lesions that are not identified in the routine biopsies.