Saeed, M.; Akhtar, K. .; Sadiq, A.; Ikram, M. .; Ahmad, K. .; Rafique, S. . Comparison of Pulmonary Vascular Resistance Measurements  by  Echocardiography   and Cardiac Catheterization. Pak Armed Forces Med J 2025, 75 (SUPPL-7), S1099-S1104. https://doi.org/10.51253/pafmj.v75iSUPPL-7.13464.