Khan, T. M.; Akhtar, A.; Farid, M. I.; Hashmi, K. A.; Bhutta, M. M. I. TRANSESOPHAGEAL ECHOCARDIOGRAPHIC ASSESSMENT OF LEFT ATRIAL THROMBUS IN PATIENTS OF RHEUMATIC SEVERE MITRAL STENOSIS WITH NEGATIVE RESULT ON TRANSTHORACIC ECHOCARDIOGRAPHY. Pak Heart J 2021, 54, 40-43.