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Published in: Clinical Research in Cardiology 9/2018

01-09-2018 | Original Paper

Patent foramen ovale closure versus medical therapy for prevention of recurrent cryptogenic embolism: updated meta-analysis of randomized clinical trials

Authors: Brunilda Alushi, Alexander Lauten, Salvatore Cassese, Roisin Colleran, Stefanie Schüpke, Himanshu Rai, Heribert Schunkert, Bernhard Meier, Ulf Landmesser, Adnan Kastrati

Published in: Clinical Research in Cardiology | Issue 9/2018

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Abstract

Background

We performed an updated meta-analysis of all randomized-controlled trials (RCTs) comparing patent foramen ovale (PFO) closure with medical therapy for prevention of recurrent ischemic stroke.

Methods and results

We searched Medline, EMBASE, and Cochrane databases, and proceedings of international meetings for RCTs of patients with cryptogenic stroke and PFO comparing percutaneous PFO closure versus medical therapy for prevention of recurrent ischemic stroke. The primary outcome was a composite ischemic/embolic endpoint comprising stroke, transient ischemic attack (TIA), peripheral embolism, and early death in the intention-to-treat population. Secondary outcomes were all-cause death, stroke, TIA, atrial fibrillation (AF), and major bleeding. Of 3440 enrolled patients across five RCTs, 1829 were allocated to PFO closure and 1611 to medical therapy. The follow-up ranged from 2 to 5.9 years. PFO closure reduced the risk of the composite outcome [HR 0.52, (0.36–0.77); p < 0.01], and stroke, [HR 0.39, (0.19–0.83); p < 0.01], and increased the risk of AF [OR 3.75, (2.44–5.78); p < 0.01] as compared to medical therapy. NNT for stroke was 37 and NNH for AF 49, indicating a net clinical benefit of PFO closure. The meta-analysis had 95% power to detect a 50% relative risk reduction (RRR) in the primary outcome and 89% power to detect a 70% RRR in ischemic stroke. The risk of all-cause death (HR 1.08, p = 0.90), TIA [HR 0.73, (0.49–1.09); p = 0.12], and major bleeding [OR 0.97, (0.44–2.17); p = 0.95] was comparable between the groups.

Conclusions

Among patients with cryptogenic stroke and PFO, percutaneous closure of PFO is superior to medical therapy in preventing recurrent ischemic/embolic events and stroke but is associated with an increased risk of AF.
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Metadata
Title
Patent foramen ovale closure versus medical therapy for prevention of recurrent cryptogenic embolism: updated meta-analysis of randomized clinical trials
Authors
Brunilda Alushi
Alexander Lauten
Salvatore Cassese
Roisin Colleran
Stefanie Schüpke
Himanshu Rai
Heribert Schunkert
Bernhard Meier
Ulf Landmesser
Adnan Kastrati
Publication date
01-09-2018
Publisher
Springer Berlin Heidelberg
Published in
Clinical Research in Cardiology / Issue 9/2018
Print ISSN: 1861-0684
Electronic ISSN: 1861-0692
DOI
https://doi.org/10.1007/s00392-018-1246-y

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