Echocardiographic classification of chonic ischemic mitral regurgitation caused by restricted motion according to tethering pattern. - Agricola,E.; Oppizzi,M.; Maisano,F.; De Bonis,M.; Schinkel,A.FL.; Torracca,L.; Margonato,A.; Melisurgo,G.; Alfieri,O. (Eur J Echocardiography, 2004)