Sardari A, Ashraf H, Khorsand M, Zoroufian A, Sahebjam M, Jalali A, Sadeghian H. Correlation between Mitral Regurgitation and Myocardial Mechanical Dyssynchrony and QRS Duration in Patients with Cardiomyopathy. J Tehran Heart Cent. 2015;9(4):147-152.