PMID- 37586823 OWN - NLM STAT- MEDLINE DCOM- 20231222 LR - 20231222 IS - 1468-201X (Electronic) IS - 1355-6037 (Linking) VI - 110 IP - 2 DP - 2023 Dec 20 TI - Impact of leaflet thrombosis on valve haemodynamic status after transcatheter aortic valve replacement. PG - 140-147 LID - 10.1136/heartjnl-2023-322946 [doi] AB - OBJECTIVES: The effect of subclinical leaflet thrombosis, characterised by hypoattenuated leaflet thickening (HALT), on the valve haemodynamic function and durability of the bioprosthetic valve, is not yet determined. We determined the impact of HALT on valve haemodynamics after transcatheter aortic valve replacement (TAVR) and the predictors of haemodynamic structural valve deterioration (SVD). METHODS: The Anticoagulation vs Dual Antiplatelet Therapy for Prevention of Leaflet Thrombosis and Cerebral Embolization after Transcatheter Aortic Valve Replacement(ADAPT-TAVR) trial is a multicenter, randomised trial that compared edoxaban and dual antiplatelet therapy in patients who had undergone successful TAVR. The presence of HALT was evaluated by four-dimensional CT at 6 months and serial echocardiography performed at baseline, immediately post-TAVR and after 6 months. SVD was defined as at least one of the following: (1) mean transprosthetic gradient >/=20 mm Hg, (2) change in the mean gradient >/=10 mm Hg from baseline, or (3) new or increase in intraprosthetic aortic regurgitation of at least >/=1 grade, resulting in moderate or greater regurgitation. RESULTS: At 6 months, HALT was found in 30 of 211 (14.2%) patients. The presence of HALT did not significantly affect aortic valve mean gradients (with vs without HALT; 14.0+/-4.8 mm Hg vs 13.7+/-5.5 mm Hg; p=0.74) at 6 months. SVD was reported in 30 of 206 patients (14.6%) at 6-month follow-up echocardiography. Older age (OR: 1.138; 95% CI: 1.019 to 1.293; p=0.033), use of aortic valve size