[Heart pathology of extracardiac origin (I). Cardiac involvement in AIDS].

A great variety of cardiac disorders have been reported in HIV-infected patients: pericarditis, myocarditis, cardiomyopathies, endocarditis, cardiac involvement through malignancies, pulmonary hypertension, arrhythmias and thromboembolic disease. In general, these disorders are asymptomatic and often diagnosed in echocardiographic studies or autopsies. Pericardial involvement is the most common disorder. Pericardial effusions are asymptomatic and non-specific in a great proportion, but in some instances opportunistic infections or malignancies may lead to cardiac tamponade and are associated with an increased risk of mortality. The etiopathogenesis of myocarditis and cardiomyopathies is uncertain. There is controversy about the role of HIV as the primary etiologic agent. Opportunistic infections, cardiotoxic substances, nutritional deficiencies and autoimmune reactions have also been implicated as etiologic agents of myocardial damage. Short-term prognosis worsens as clinical manifestations of heart failure appear. Valvular involvement usually presents as marantic or infectious endocarditis, the latter most frequently in IVDU. This article reviews the main cardiovascular manifestations in AIDS.