Case Report: A Huge Atrial Myxoma Located in the Right Atrial Chamber Caused Severe Tricuspid Valve Regurgitation

Abstract

This case report documents a rare presentation of a primary cardiac tumor, known as myxoma, in the right atrium of a 32-year-old Thai woman with no underlying disease. Myxomas are typically found in the left atrium, making this case unusual. The patient presented with progressive chest pain and dyspnea on exertion. The investigation confirmed the presence of a large myxoma in the right atrium that was obstructive and caused severe tricuspid valve regurgitation and annulus dilation. The patient underwent surgical treatment, where the mass was excised, and tricuspid valve replacement was carried out using a tissue valve due to the difficulty in repairing the damage caused by the myxoma. Postoperative follow-up showed a successful outcome, with good ejection fraction, tricuspid value function, and no chamber enlargement. This case report also highlights the importance of prompt diagnosis and surgical intervention in cases of myxomas, especially when they are located in rare locations like the right atrium and are obstructive, causing severe valve damage. It also emphasized the significance of careful monitoring and follow-up after surgery to ensure the patient’s full recovery. Overall, this report provides valuable insights into diagnosing and managing rare presentations of primary cardiac tumors like myxomas.