Mohamed Elsayed Abdelfattah, Reda Biomy Bastawisy, Wael Anwar Haseeb, Hany Mahmoud, and Abdel-Shakour. “Role of Speckle Tracking Echocardiography in Prediction of Responders to Cardiac Resynchronization Therapy”. Journal of the Pakistan Medical Association 73, no. 4 (May 15, 2023): S98-S102. Accessed April 18, 2026. https://jpma.org.pk/index.php/public_html/article/view/9831.