3-2 Echocardiographic and fluoroscopic findings
Obstructive TV thrombosis were found in 65 (97%) based on both echocardiographic Doppler assessments and leaflet movement in fluoroscopy. Transesophageal echocardiography (TEE) was performed in 20 (29.8%) episodes. The reductions in the averages of mean gradients and pressure half-time were significantly different after successful treatment (p <0.001). Transvalvular leak severity decreased after thrombolytic therapy, and its changes were statistically significant (p = 0.013). Decrease in mean inferior vena cava size and increase in its respiratory collapsibility after treatment were statistically significant (p = 0.001 and p <0.001, respectively), revealing decreased RA pressure after treatment. There were no statistically significant changes in right ventricular (RV) function, RV peak systolic myocardial velocity (Sm), Tricuspid Annular Plane Systolic Excursion (TAPSE), and mean pulmonary artery pressure (mean PAP). First fluoroscopy on admission revealed both leaflets blockade in 30 (44.7%), one leaflet blockade in 28 (41.8%) and limitation of motion in 9 (13.4%). Of fixed occluders of TV leaflets, 71.6% were in semi-open position. All measured echocardiographic parameters before and after treatment were summarized in (Table 2) .