³í¹®) Long- term outcomes in distinct phenogroups of patients with primary mitral regurgitation undergoing valve surgery ¼¿ï´ëº´¿ø ¼øȯ±â³»°ú À̽ÂÇ¥ ±³¼ö(»çÁø ñ§)[°û¼ø±¸ Àü¹®ÀÇ(éÓ)]·¾Æ»êº´¿ø ½ÉÀå³»°ú ±è´ëÈñ ±³¼ö(ÀÌ½Â¾Æ ±³¼ö) °øµ¿¿¬±¸ÆÀ