Left atrial appendage occlusion in chicken-wing anatomies: Imaging assessment, procedural, and clinical outcomes of the "sandwich technique"

Catheter Cardiovasc Interv. 2021 Jun 1;97(7):E1025-E1032. doi: 10.1002/ccd.29546. Epub 2021 Feb 13.

Abstract

Objectives: To describe imaging assessment, procedural and follow-up outcome of patients undergoing left atrial appendage (LAA) occlusion (LAAO) using a "sandwich" technique.

Background: The presence of a LAA with chicken wing morphology constitutes a challenge that sometimes requires specific occlusion strategies like the "sandwich" technique. However, procedural and follow-up data focusing on this implanting strategy is scarce.

Methods: This multicenter study collected individual data from eight centers between 2012 and 2019. Consecutive patients with chicken-wing LAAs defined as an early (<20 mm from the ostium) and severe bend (>90°) who underwent LAAO with Amplatzer devices and using the "sandwich" technique were included in the analysis.

Results: Overall, 190 subjects were enrolled in the study. Procedures were done with the Amulet device (85%) and the Amplatzer Cardiac Plug (15%). Successful implantation was achieved in 99.5% with ≤1 partial recapture in 80% of cases. Single (46.2%) and dual antiplatelet therapy (39.4%) were the most used antithrombotic therapies after LAAO. In-hospital major adverse events rate was 1.5% with no deaths. One patient (0.5%) had cardiac tamponade requiring percutaneous drainage. With a mean follow-up of 19.6 ± 14.8 months, the mortality and stroke rates were 7.7%/year and 2.5%/year, respectively. Follow-up transesophageal echocardiography (TEE) at 2-3 months showed device-related thrombosis in 2.8% and peri-device leak ≥3 mm in 1.2% of patients.

Conclusions: In a large series of patients with chicken wing LAA anatomies undergoing LAAO, the use of the "sandwich" technique was feasible and safe. Preprocedural imaging was a key-factor to determine specific measurements.

Keywords: atrial fibrillation; chicken wing; left atrial appendage; sandwich technique.

Publication types

  • Multicenter Study

MeSH terms

  • Atrial Appendage* / diagnostic imaging
  • Atrial Appendage* / surgery
  • Atrial Fibrillation* / diagnostic imaging
  • Echocardiography, Transesophageal
  • Humans
  • Stroke*
  • Treatment Outcome