The pericardial effusion localized on the upper portion of the right atrium is a classical complication of the post-operative heart surgery setting. This issue is most likely not visualized by transthoracic echocardiography and needs the transoesophageal approach. The present case reports a situation where an associated bilateral pleural effusion permitted a new view of the heart which has been helpful to confirm the diagnosis of tamponade and to re-transfer the patient to the operative room.