カテーテルアブレーション後に発生した右房粘液腫の1例

Right Atrial Myxoma After Catheter Ablation：Report of a Case

はじめに　心臓粘液腫はまれであり，初期症状に乏しいため早期発見が困難である．われわれは，カテーテルアブレーション（CA）後に発生した右房粘液腫の1例を経験したので報告する．

An 81-year-old man underwent total arch replacement for thoracic aortic aneurysm 8 years ago and catheter ablation for paroxysmal atrial fibrillation 1 year ago. Transthoracic echocardiography revealed a mass in the right atrium, and the patient was admitted for close examination and treatment. Transesophageal echocardiography revealed a 23×17 mm large well-defined mass above the cavotricuspid isthmus. Two venous drainage cannulas were inserted directly to the superior vena cava and to the inferior vena cava via the right femoral vein, in order to avoid the direct contact with the right atrium prior to institution of cardiopulmonary bypass. The right atrial tumor was found attached to the cavotricuspid isthmus, and was resected together with the right atrial wall. Pathological examination showed myxomatous tissue. Postoperative course was uneventful. He was discharged 23 days after the operation.