Publication Date
8-1-2020
Journal
The Texas Heart Institute Journal
DOI
10.14503/THIJ-17-6582
PMID
33472221
Publication Date(s)
August 2020
Language
English
PMCID
PMC7819438
PubMedCentral® Posted Date
8-20-2020
PubMedCentral® Full Text Version
Post-Print
Published Open-Access
yes
Keywords
Embolism/etiology/prevention & control, foramen ovale, patent/complications/diagnostic imaging/surgery/therapy, heart atria/abnormalities/complications, ischemic attack, transient/etiology/prevention & control, recurrence, retrospective studies, risk factors, secondary prevention, stroke/prevention & control, treatment outcome
Copyright
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Abstract
Percutaneous closure of patent foramen ovale (PFO) is widely performed to prevent recurrent stroke or transient ischemic attack in patients with cryptogenic stroke. However, the influence of different degrees of right-to-left shunting (RLS) has rarely been reported.
We retrospectively evaluated the cases of 268 patients with cryptogenic stroke who underwent PFO closure at our hospital from April 2012 through April 2015. In accordance with RLS severity, we divided the patients into 2 groups: persistent RLS during normal breathing and the Valsalva maneuver (n=112) and RLS only during the Valsalva maneuver (n=156). Baseline characteristics, morphologic features, and procedural and follow-up data were reviewed. The primary endpoint was stroke or transient ischemic attack.
More patients in the persistent group had multiple or bilateral ischemic lesions, as well as a larger median PFO diameter (2.5 mm [range, 1.8–3.9 mm]) than did patients in the Valsalva maneuver group (1.3 mm [range, 0.9–1.9 mm]) (PP=0.018). Three patients in the persistent group had residual shunting. The annual risk of recurrent ischemic stroke was similar between groups: 0.298% (persistent) and 0.214% (Valsalva maneuver).
Our findings suggest that patients with persistent RLS have more numerous severe ischemic lesions, larger PFOs, and a higher incidence of atrial septal aneurysm than do those without. Although our persistent group had a greater risk of residual shunting after PFO closure, recurrence of ischemic events did not differ significantly from that in the Valsalva maneuver group.