Impact of CoreValve size selection based on multi-slice computed tomography on paravalvular leak after transcatheter aortic valve implantation
Abstract
Background: Paravalvular leak (PVL) has significant impact on long-term outcomes in patients after transcatheter aortic valve implantation (TAVI). This study sought to determine whether multi-slice computed tomography (MSCT)-guided valve selection reduces PVL after CoreValve implantation.
Methods: The analysis encompassed 69 patients implanted with CoreValve and were divided into two groups. In Group I (30 patients), valve selection was based on standard procedures, in Group II (39 patients), on MSCT measurements. Paravalvular leak was assessed with angiography and echocardiography.
Results: Multi-slice computed tomography results influenced a change of decision as to the size of the implanted valve in 12 (30.9%) patients in Group II and would have caused the decision to change in 9 (37.5%) patients in Group I. The degree of oversizing in Group I and II was 12.8% ± ± 7.6% vs. 18.6% ± 5.1% (p = 0.0006), respectively. The oversizing among the patients with leak degree of 0–1 and ≥ 2 was 18.1% ± 6.0% and 12.8% ± 7.4% (p = 0.0036). Angiographic assessment indicated post-procedural PVL ≥ 2 in 50% of patients in Group I and 20.5% in Group II (p = 0.01), while echocardiographic assessment indicated the same in 73.3% of patients in Group I and 45.6% in Group II (p = 0.0136). The composite endpoint occurred in 26.6% (8/30) patients in Group I vs. 5.1% (2/39) patients in Group II (p = 0.0118).
Conclusions: Selecting the CoreValve device based on MSCT resulted in smaller rates of PVL and less frequent composite endpoint. In 1/3 of patients MSCT led to a change of the valve size. The degree of oversizing had a significant impact on PVL.
Keywords: paravalvular leakaortic valve stenosistranscatheter aortic valve implantationCoreValvemulti-slice computed tomography
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