title: Chloroquine-induced cardiomyopathy.
abstract: Biventricular hypertrophy and failure developed in two patients during treatment of systemic lupus erythematosus with chloroquine phosphate. In both patients, morphologic analysis of the myocardium, obtained by a right ventricular endomyocardial biopsy in one patient and at autopsy in the other, revealed accumulations of electron-dense concentric and parallel lamellae and curvilinear bodies within cardiac myocytes. These deposits were similar to those reported in chloroquine-induced skeletal myopathy and were considered to represent evidence of chloroquine-induced cardiotoxicity rather than a cardiovascular manifestation of the underlying disease. Clinical awareness and an endomyocardial biopsy specimen are necessary for the appropriate diagnosis of chloroquine-induced cardiomyopathy.
mesh_terms: D000328:Adult; D000368:Aged; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects*; D006332:Cardiomegaly / Q000139:chemically induced* / Q000473:pathology; D002738:Chloroquine / Q000009:adverse effects / Q000031:analogs & derivatives*; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000188:drug therapy*; D008854:Microscopy, Electron; D009132:Muscles / Q000473:pathology; D009206:Myocardium / Q000473:pathology
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; C023676:chloroquine diphosphate; D002738:Chloroquine