Removal of a left ventricular thrombus complicated by cardiac sarcoidosis using a 3D microscope system

A woman in her 60s was brought to the previous hospital with respiratory distress. She was referred for the treatment of severe cardiac dysfunction and a mobile mass in the left ventricle. Echocardiography revealed the mass to be of 20×11 mm in size, mobile and slightly attached to the left ventricle by a stalk. As MRI had already revealed a small cerebral infarction, we have decided to perform emergency thrombectomy of the left ventricle. As the left ventricular contractility was diffusely impaired, we were able to remove the mass without any residuals using a transseptal approach without a left ventricular incision using a three-dimensional microscope system. The pathological diagnosis of the mass was thrombus, and subsequent close examination led to the diagnosis of cardiac sarcoidosis. We report the surgical technique and removal of a left ventricular thrombus complicated by cardiac sarcoidosis.