Interventions for hypertension and stroke

Post-release shift with Watchman FLX devices during left atrial appendage closure: the “popcorn effect”

EuroIntervention 2022;18:e181-e182. DOI: 10.4244/EIJ-D-21-01033

Iria Silva
Iria Silva1, MD; Jonathan Beaudoin1, MD; Jean Champagne1, MD; Jean-Michel Paradis1, MD; Mathieu Bernier1, MD; Kim O’Connor1, MD; Nicolas Dognin1, MD; Maryse Lemyre1, RN; Josep Rodés-Cabau1, MD; Gilles O’Hara1, MD; Erwan Salaun1, MD, PhD
1. Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Quebec City, Canada


Figure 1. Procedural popcorn effect and atypical images of the polyester fabric cover during the follow-up with the Watchman FLX devices. A. Baseline LAA anatomy in patients 1 and 2. B. PASS criteria before release, and position, compression, and conformation after "popcorn effect" in patients 1 (delayed) and 2 (immediate) following the release. Prolonged TEE observation showed a stable position with shoulder (red double arrow) but without residual motion. C. At the 6-week TEE follow-up, presence of mild billowing motion of the polyester fabric cover (wind sailing effect) for patient 1 (yellow dashed arrows) and partially raised polyester cover fabric without motion for patient 2 (green ...

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