Journal of Echocardiography

, Volume 10, Issue 2, pp 65–66 | Cite as

Left atrial appendage occlusion device-related thrombus: a case report and review of the literature

  • Mohammed Andaleeb Chowdhury
  • Wael ElabbassiEmail author
  • Arif Al Nooryani
Case Report


A 75-year-old male with persistent atrial fibrillation underwent implantation of a left atrial occlusion device. After 6 weeks, a scheduled trans-esophageal echocardiogram showed a 1.1-cm × 1.1-cm mass within the occluded left atrial appendage, suspected to be thrombus. He was continued on warfarin for an additional 6 weeks and a repeat trans-esophageal echocardiogram showed obliteration of the left atrial appendage. This report describes an uncommon observation detected at scheduled follow up by trans-esophageal echocardiogram, which sheds some light on the mechanism by which this device “matures” after it is implanted inside the left atrial appendage.


Watchman Left atrial appendage occlusion Device-related thrombus Atrial fibrillation 



Trans-esophageal echocardiogram


Left atrial appendage


Transient ischaemic attack


Conflict of interest

We report no conflict of interest for the physicians involved in preparing this manuscript.

Supplementary material

Video 1. Zoom at 94°. Space-occupying mass behind the barbs of the WATCHMAN device implanted inside the left atrial appendage (AVI 9204 kb)

Video 2. Modified left atrial view showing the left ventricular outflow tract, aortic valve and part of the left atrial appendage with the clot sealed inside (AVI 10328 kb)


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Copyright information

© Japanese Society of Echocardiography 2012

Authors and Affiliations

  • Mohammed Andaleeb Chowdhury
    • 1
  • Wael Elabbassi
    • 1
    Email author
  • Arif Al Nooryani
    • 1
  1. 1.Department of CardiologyAl Qassimi HospitalSharjahUnited Arab Emirates

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