title: A huge mediastinal organizing hematoma causing reversal of atrial septal defect shunt flow.
abstract: We report a case of a 46-year-old woman who presented with subacute exertional dyspnea and severe hypoxia. A large cystic mass compressing the right side of the heart along with right-to-left atrial shunt flow through an alleged atrial septal defect (ASD) were detected on echocardiography. CT scan of the chest and MRI of the heart revealed a loculated cystic mediastinal mass with hemorrhage measuring 5.5×8 cm compressing the right atrium and ventricle. The patient underwent cyst resection and primary closure of the ASD. This report illustrates a case of an unusual symptomatic pericardial mass compressing the right atrium and ventricle in a patient with an secundum ASD.
authors: Division of Cardiology, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Eun Kyoung
authors: EK
authors: Kim
authors: Sang Chol
authors: SC
authors: Lee
authors: Sung Bum
authors: SB
authors: Park
authors: Silvia
authors: S
authors: Park
authors: Sunha
authors: S
authors: Bahng
authors: Yeon Hyeon
authors: YH
authors: Choe
authors: Kiick
authors: K
authors: Sung