MedStar Authors catalog › Details for: Possible Subclinical Leaflet Thrombosis in Bioprosthetic Aortic Valves.
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Possible Subclinical Leaflet Thrombosis in Bioprosthetic Aortic Valves.

by Asch, Federico M; Pichard, Augusto D; Weissman, Neil J.
Citation: New England Journal of Medicine. 373(21):2015-24, 2015 Nov 19..Journal: The New England journal of medicine.ISSN: 1533-4406.Full author list: Makkar RR; Fontana G; Jilaihawi H; Chakravarty T; Kofoed KF; de Backer O; Asch FM; Ruiz CE; Olsen NT; Trento A; Friedman J; Berman D; Cheng W; Kashif M; Jelnin V; Kliger CA; Guo H; Pichard AD; Weissman NJ; Kapadia S; Manasse E; Bhatt DL; Leon MB; Sondergaard L.UI/PMID: 26436963.Subject(s): Aged | Aged, 80 and over | *Anticoagulants/tu [Therapeutic Use] | *Aortic Valve/pp [Physiopathology] | Aortic Valve/ra [Radiography] | Aortic Valve/su [Surgery] | *Bioprosthesis/ae [Adverse Effects] | Female | Four-Dimensional Computed Tomography | *Heart Valve Diseases/et [Etiology] | *Heart Valve Prosthesis/ae [Adverse Effects] | Humans | Ischemic Attack, Transient/et [Etiology] | Male | Registries | Stroke/et [Etiology] | *Thrombosis/et [Etiology]Institution(s): MedStar Heart & Vascular InstituteActivity type: Journal Article.Medline article type(s): Journal Article | Randomized Controlled Trial | Research Support, Non-U.S. Gov'tOnline resources: Click here to access online Digital Object Identifier: (Click here) Abbreviated citation: N Engl J Med. 373(21):2015-24, 2015 Nov 19.Local Holdings: Available online from MWHC library: 1993 - present, Available in print through MWHC library: 1980 - present.Abstract: BACKGROUND: A finding of reduced aortic-valve leaflet motion was noted on computed tomography (CT) in a patient who had a stroke after transcatheter aortic-valve replacement (TAVR) during an ongoing clinical trial. This finding raised a concern about possible subclinical leaflet thrombosis and prompted further investigation.Abstract: METHODS: We analyzed data obtained from 55 patients in a clinical trial of TAVR and from two single-center registries that included 132 patients who were undergoing either TAVR or surgical aortic-valve bioprosthesis implantation. We obtained four-dimensional, volume-rendered CT scans along with data on anticoagulation and clinical outcomes (including strokes and transient ischemic attacks [TIAs]).Abstract: RESULTS: Reduced leaflet motion was noted on CT in 22 of 55 patients (40%) in the clinical trial and in 17 of 132 patients (13%) in the two registries. Reduced leaflet motion was detected among patients with multiple bioprosthesis types, including transcatheter and surgical bioprostheses. Therapeutic anticoagulation with warfarin, as compared with dual antiplatelet therapy, was associated with a decreased incidence of reduced leaflet motion (0% and 55%, respectively, P=0.01 in the clinical trial; and 0% and 29%, respectively, P=0.04 in the pooled registries). In patients who were reevaluated with follow-up CT, restoration of leaflet motion was noted in all 11 patients who were receiving anticoagulation and in 1 of 10 patients who were not receiving anticoagulation (P<0.001). There was no significant difference in the incidence of stroke or TIA between patients with reduced leaflet motion and those with normal leaflet motion in the clinical trial (2 of 22 patients and 0 of 33 patients, respectively; P=0.16), although in the pooled registries, a significant difference was detected (3 of 17 patients and 1 of 115 patients, respectively; P=0.007).Abstract: CONCLUSIONS: Reduced aortic-valve leaflet motion was shown in patients with bioprosthetic aortic valves. The condition resolved with therapeutic anticoagulation. The effect of this finding on clinical outcomes including stroke needs further investigation. (Funded by St. Jude Medical and Cedars-Sinai Heart Institute; Portico-IDE number, NCT02000115; SAVORY registry, NCT02426307; and RESOLVE registry, NCT02318342.).

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