Validity of Estimation of Pulmonary artery Pressure Using Continuous wave Doppler Echocardiography in Patient with Patent Ductus Arteriosus (PDA). Univ. Heart J. [Internet]. 2012 Mar. 29 [cited 2026 Jul. 1];7(1):10-2. Available from: https://www.banglajol.info/index.php/UHJ/article/view/10202