7Shub C, Dimopoulos IN, Senard JB. Sensitivity of two dimensional echocardiography in the direct visualization of atrial septal defect utilizing the approach: experience with 154 patients. J Am Coll Cardiol 1993, 2: 127
8Cziner DG, Rosenzweig BP, Katz ES, et al. Transesophageal versus transthoracic echocardiography for diagnosing mitral valve perforation. Am JCardiol 1992, 69:1495~1497
9Megerbwitz CB, Jacobs LE, Kotler MN, et al. Assesment of aortic regurgitation by transesophageal echocardiography: Correlation with angiographic determination. Echocardiography 1993, 10 (3): 269~278