A case of right ventricular diastolic dysfunction due to a large hematoma posterior to the left ventricle.

We report a case of right ventricular (RV) diastolic dysfunction due to a large hematoma posterior to the left ventricle (LV) after cardiac surgery. An 80-year-old woman underwent cardiac surgery. After surgery, her physical findings revealed right heart failure. Localized hematoma posterior to the pericardial space and the RV compression to the sternum were shown by computed tomography. Transthoracic Doppler echocardiography demonstrated restrictive physiology of the RV although there was no evidence of constrictive pericarditis. These findings suggest that RV diastolic dysfunction could have occurred due to the hematoma posterior to the LV. Since pleural effusion had persisted despite medical therapy, the hematoma was removed surgically. Soon after surgery, dyspnea and pretibial edema were diminished; bilateral pleural effusion dramatically disappeared. RV diastolic dysfunction estimated by echocardiography was improved and RV compression disappeared. We speculate that there are two physiological mechanisms for the RV compression: (1) the localized hematoma elevated the intrapericardial pressure and (2) the hematoma shifted the entire heart to the sternum. In conclusion, this is the first case report of RV diastolic dysfunction due to large hematoma posterior to the LV. <Learning objective: Localized hematoma posterior to the left ventricle can be a cause of right ventricular compression that leads to onset of severe right ventricular diastolic dysfunction.>.