1Ruiz CE, Zhang HP, Macaya C, et al. Comparison of Inoue single - balloon versus doubel- balloon technique for percutaneous mitral valvotomy. Am Heart J 1992; 123:942
3Herrmann HC, Kleaveland JP, Hill JA, et al. The M - Heart percutaneous balloon mitral valvuloplasty registry:initial results and early follow- up.J Am Coll Cardiol 1990;15:1221
4Faletra F, Pezzano A Jr, Fusco R, et al. Measurement of mitral valve area in mitral stenosis: four echo- cardiographic methods compared with direct measurement of anatomic orifices. J Am Coll Cardiol 1996;28:1190