Koirala I, Panthee N, Adhikari A, Timilsina P, Thapa A, Acharya S, et al. Age and Defect Size as Predictors of Pulmonary Hypertension in Secundum Atrial Septal Defect: A Retrospective Study from the Himalayan Region. Nepalese Heart J. [Internet]. 2025 May 10 [cited 2025 Dec. 7];22(1):43-6. Available from: https://nepjol.info/index.php/NHJ/article/view/78227