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JOURNAL ARTICLE
META-ANALYSIS
REVIEW
Meta-Analysis Comparing Single Versus Dual Antiplatelet Therapy Following Transcatheter Aortic Valve Implantation.
American Journal of Cardiology 2018 July 16
To compare dual antiplatelet therapy (DAPT) versus single antiplatelet therapy (SAPT) as antithrombotic treatment after transcatheter aortic valve implantation (TAVI) for the prevention of ischemic events, vascular and bleeding events, and death. Data from the 3 randomized trials comparing DAPT versus SAPT post-TAVI were pooled and analyzed in a patient-level meta-analysis. The primary end point was the occurrence of death, major or life-threatening bleedings, and major vascular complications at 30-day follow-up. Events were adjudicated according to the Valve Academic Research Consortium 2 definitions. A total of 421 patients randomized to DAPT (210 patients) or SAPT (211 patients) post-TAVI were analyzed. There were no differences between groups in baseline clinical and procedural characteristics. The occurrence of the 30-day combined primary end point was higher in the DAPT group (17.6% vs 10.9%, odds ratio 1.73, 95% confidence interval 1.00 to 2.98, p = 0.050), with an increased rate of major or life-threatening bleeding events in the DAPT group (11.4% vs 5.2%, odds ratio 2.24, 95% confidence interval 1.12 to 4.46, p = 0.022). There were no differences between DAPT and SAPT groups in the incidence of death (5.2% vs 3.8%, p = 0.477), global ischemic events (3.8% vs 3.8%, p = 0.999), or stroke (2.4% vs 2.4%, p = 0.996). DAPT (vs SAPT) was associated with a higher rate of major adverse events after TAVI, mainly driven by an increased risk of major or life-threatening bleeding complications along with a lack of beneficial effect on ischemic events. These results do not support the current recommendation of DAPT as antithrombotic therapy after TAVI.
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