
Resumen La cloroquina y sus derivados son farmacos antipaludicos utilizados en enfermedades del colageno y afecciones dermatologicas. Describimos un caso de cardiotoxicidad en una mujer de 59 anos diagnosticada de lupus eritematoso discoide y tratada con cloroquina durante 25 anos. La paciente desarrollo trastornos de la conduccion y fallo cardiaco, falleciendo finalmente. El corazon mostro hipertrofia biventricular. Describimos el primer caso de auriculopatia inducida por cloroquina. La microscopia optica y electronica demostraron vacuolizacion autofagica de los miocardiocitos auriculares granulares y agranulares, presencia de cuerpos curvilineos y figuras mieloides, alteraciones mitocondriales y de miofilamentos. La cardiotoxicidad de la cloroquina afecto mas intensamente a la auricula derecha que al resto del corazon. Ello podria explicar, en parte, la aparicion de arritmias que ocurre en algunos casos de cardiomiopatia inducida por cloroquina.
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