Iqbal, M. K.; Maqbool, M. F.; Tawwab, S.; Butt, U. M.; Saleem, I.; Naveed, T. Comparison of Tissue Doppler Derived Systolic Strain Between Different Severities of Left Ventricular Dysfunction in Patients Having Rheumatic Severe Mitral Regurgitation. J Fatima Jinnah Med Univ 2020, 13, 145-149.