Ji Y. Kim, et al. operating room, not only to evaluate the result of the cardiac surgery, but also to detect any unpre- dictable events during the surgery. REFERENCES 1. Gillinov AM, Cosgrove DM, Lytle BW, Taylor PC, Stewart RW, McCarthy PM, et al. Reoperation for failure of mitral valve repair. J Thorac Cardiovasc Surg 1997;113:467-75. 2. Reichert SL, Visser CA, Moulijn AC, Suttorp MJ, vd Brink RB, Koolen JJ, et al. Intraoperative transeso- phageal color-coded Doppler echocardiography for evaluation of residual regurgitation after mitral valve repair. J Thorac Cardiovasc Surg 1990;100:756-61. 3. Agricola E, Oppizzi M, Maisano F, Bove T, De Bonis M, Toracca L, et al. Detection of mechanisms of imme- diate failure by transesophageal echocardiography in quadrangular resection mitral valve repair technique for severe mitral regurgitation. Am J Cardiol 2003;91: 175-9. 4. Agricola E, Oppizzi M, De Bonis M, Maisano F, Toracca L, Bove T, et al. Multiplane transesophageal echocar- diography performed according to the guidelines of the American Society of Echocardiography in patients with mitral valve prolapse, flail, and endocarditis: diagnostic accuracy in the identification of mitral regurgitant defects by correlation with surgical findings. J Am Soc Echocardiogr 2003;16:61-6. 5. Lambert AS, Miller JP, Merrick SH, Schiller NB, Foster E, Muhiudeen-Russell I, et al. Improved evaluation of the location and mechanism of mitral valve regurgi- tation with a systematic transesophageal echocardio- graphy examination. Anesth Analg 1999;88:1205-12. 6. Saiki Y, Kasegawa H, Kawase M, Osada H, Ootaki E. Intraoperative TEE during mitral valve repair: dose it predict early and late postoperative mitral valve dys- function? Ann Thorac Surg 1998;66:1277-81. 7. Muratori M, Berti M, Doria E, Antona C, Alamanni F, Sisillo E, et al. Transesophageal echocardiography as predictor of mitral valve repair. J Heart Valve Dis 2001; 10:65-71 8. Enriquez-Sarano M, Freeman WK, Tribouilloy CM, Orszulak TA, Khandheria BK, Seward JB, et al. Func- tional anatomy of mitral regurgitation: accuracy and outcome implications of transesophageal echocardio- graphy. J Am Coll Cardiol 1999;34:1129-36. 9. Agricola E, Oppizzi M, Melisurgo G, Margonato A. Transesophageal echocardiography: a complementary view of the heart. Expert Rev Cardiovasc Ther 2004;2: 61-75. Yonsei Med J Vol. 47, No. 3, 2006