“Comparison of Tissue Doppler Derived Systolic Strain Between Different Severities of Left Ventricular Dysfunction in Patients Having Rheumatic Severe Mitral Regurgitation”. Journal of Fatima Jinnah Medical University 13, no. 4 (January 15, 2020): 145–149. Accessed April 11, 2026. https://jfjmu.com/index.php/ojs/article/view/631.