Cardiology

The Impact of CHA2DS2-VASc and HAS-BLED Scores on Clinical Outcomes in the Amplatzer Amulet Study.


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The Impact of CHA2DS2-VASc and HAS-BLED Scores on Clinical Outcomes in the Amplatzer Amulet Study.

JACC Cardiovasc Interv. 2020 Sep 28;13(18):2099-2108

Authors: Tarantini G, D’Amico G, Schmidt B, Mazzone P, Berti S, Fischer S, Lund J, Montorfano M, Della Bella P, Lam SCC, Cruz-Gonzalez I, Gage R, Zhao H, Omran H, Odenstedt J, Nielsen-Kudsk JE

Abstract
OBJECTIVES: The aim of this study was to evaluate the impact of CHA2DS2-VASc and HAS-BLED scores on ischemic and bleeding events of patients enrolled in the Amplatzer Amulet Observational Study.
BACKGROUND: Baseline CHA2DS2-VASc and HAS-BLED scores have been validated in atrial fibrillation patients to guide about anticoagulation but not in patients treated by left atrial appendage occlusion (LAAO).
METHODS: Subjects were stratified according to CHA2DS2-VASc and HAS-BLED scores. Clinical outcomes were collected through 2 years and adjudicated by an independent committee.
RESULTS: Subjects were considered at low (n = 156), moderate (n = 715), and high (n = 215) risk for ischemic stroke, corresponding to CHA2DS2-VASc scores of <3, 3 to 5, and ≥6, respectively. The annual rates of ischemic stroke were 1.1%, 2.0%, and 3.5%, respectively. When compared with the predicted rate, LAAO reduced the risk of ischemic stroke by 56%, 69%, and 68%. Device-related thrombus occurred in 0.7%, 1.5%, and 3.0% of subjects at low, moderate, and high risk for ischemic stroke, respectively. The HAS-BLED score was ≤3 in 629 subjects and >3 in 456 subjects, respectively. Non-peri-procedural major bleeding was reduced by 11% and 9% compared with predicted rates in the low and high bleeding risk groups, respectively.
CONCLUSIONS: LAAO with the Amplatzer Amulet reduced the risk of ischemic stroke compared with the predicted rate, with a greater magnitude among patients at high thromboembolic risk without increasing the bleeding risk. (Amplatzer™Amulet™ Post-Market Study [Amulet™PMS]; NCT02447081).

PMID: 32972570 [PubMed – in process]

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