Amitabh, Poonia2020-02-032020-02-032018-12https://dspace.sctimst.ac.in/handle/123456789/10951A STUDY OF SUPERIOR VENACAVA, HEPATIC VENOUS PULSE WAVE DOPPLER IN OSTIUM-SECUNDUM ATRIAL SEPTAL DEFECT PATIENTS -- BEFORE AND AFTER DEVICE CLOSURE.Thesis