The most likely of benign heart tumors are atrial myxoma. Radical cure for this kind of tumor is only by surgical treatment. Patients & Method: retrospective study in 185 primary tumors which were resected at the Heart Institute of Ho chi Minh city-VietNam from Jan 1992 to Dec 2008.Results: 173 cases were atrial myxoma, left atrial myxoma was 83.8% and right atrial myxoma was 7.5%.