渡辺 賢一, 広川 陽一, 大滝 英二, 相沢 義房, 朱 敏秀, 柴田 昭

Kenichi WATANABE, Yoichi HIROKAWA, Eiji OHTAKI, Yoshifusa AIZAWA, Toshihide SHU, Akira SHIBATA

新潟大学医学部第一内科

The 1st Dep. of Internal Medicine, Niigata Univ. School of Medicine

キーワード : cardiac myxoma, 2-D echocardiography, site of stalk, pre-operative diagnosis, mitral valve replacement

Three patients with atrial myxoma, two in the left atrium and one in the right atrium were studied using two-dimensional echocardiography. Four cross sections including long axis, short axis, subcostal and four chamber views of the left ventricle showed that the stalk of one left atrial myxoma was adhered to the anterior commissure, the other to the left atrial wall underlying the aortic posterior wall, and that of right atrial myxoma to the free wall of the right atrium. In one of the three patients, coronary arteriography was performed but failed to demonstrate the site of tumor origin. The myxomata were successfully removed by surgical intervention in all cases, where the sites of stalk were verified to be identical as diagnosed by echocardiography.
Two-dimensional echocardiography was useful to diagnose the site of the stalks pre-operatively and to decide the procedure of the operation.