A Case of a Serpentine-like Right Atrial Thrombus Causing Pulmonary Embolism

Right atrial thrombi are rare but cause mortality in approximately 30-40% of cases. Echocardiography is important for determining the causes of the cardiac origin of pulmonary embolism, and, simultaneously, mobile thrombi can be rarely visualized in the right atrium and pulmonary artery. Thrombolytic therapy is a life-saving intervention in patients with a right atrial thrombus and massive pulmonary embolism. In this report, we present a case of a serpentine-like right atrial thrombus adhered to the interatrial septum, leading to pulmonary embolism. The interesting feature of this case is that mobile thrombi were simultaneously visualized in the right atrium and pulmonary artery by transthoracic echocardiography.