Aftab, Sadqa, Shams Rashdi, Abdul Bari, Mudassir Iqbal Darr, and Aftab Mehmood. 2008. “PEROPERATIVE TRANSESOPHAGEAL ECHOCARDIOGRAPHY: CLINICAL BENEFIT DURING CARDIAC SURGERY”. Journal of the Dow University of Health Sciences (JDUHS) 3 (1):22-26. https://mail.jduhs.com/index.php/jduhs/article/view/1304.