Rumanti ER. Measurement Of The Stenosis Mitral by Using The Method Flow Convergence Or Proximal Isovelocity Area (PISA) And Planimetri. ARKAVI [Internet]. 2018 Jul. 1 [cited 2024 Nov. 24];3(2):211-2013. Available from: https://journal.uhamka.ac.id/index.php/arkavi/article/view/5482