Atrioventricular Septal Defect (Transitional Form)
A 57-year-old woman presented with dyspnea on exertion (functional class II) of 1-year duration. She had a history of breast ductal invasive carcinoma 2 years previously and had undergone mastectomy and chemotherapy. She was nulliparous. Physical examination revealed a holosystolic murmur at the apex and the lower left sternal border. Electrocardiography showed normal sinus rhythm and left axis deviation.
(MP4 18539 kb)