RESUMEN
Radiation therapy is one of the cardial therapeutic modality on breast cancer. Three decades ago, the heart was considered to be radioresistant, but now it is generally recognized that the heart is also radiosensitive. The most common clinical syndromes after irradiation are pericarditis in acute and chronic forms, cardiomyopathy, valvular disease and, to a lesser degree, complete atrioventricular block. However, lesions of coronary vessels had been considered exceptionally rare and even questionable. And then there have been a few case reports for acute myocardial infartion after irradiation for left sided breast cancer and it may be considered that radiation therpy can injure endothelium of coronary artery and cause ischemic coronary artery disease. We report the case of a 38 years old women who developed acute anterior wall myocardial infarction after irradiation for left sided breast cancer.