Giant right atrial myxoma with rheumatic mitral valve disease.

A patient with a 456 Gram right atrial myxoma is described. Associated rheumatic mitral valvular heart disease obscured the presence of the tumor and only with presentation of bradyarrhythmias leading to pacemaker implantation was the diagnosis suspected. Successful surgical removal of the tumor and correction of the intracardiac valvular dysfunction were performed. The role of echocardiography in the early detection of these tumors is reinforced.