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The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

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Published on: February 28, 2012

A Stunning Left Atrial Appendage Thrombus.

Sajid Ali¹, Justin Ugwu, Yousuf Kanjwal

¹Mercy St. Vincent Hospital and Medical Center, Toledo, Ohio, USA.

|April 26, 2016

Summary

This summary is machine-generated.

Acute left atrial appendage thrombus formation can occur immediately after atrial flutter ablation. This highlights the importance of continuing anticoagulation therapy during and after arrhythmia conversion to prevent stroke risk.

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Area of Science:

Cardiology
Electrophysiology
Vascular Medicine

Background:

Left atrial appendage (LAA) thrombus formation is a significant complication of atrial fibrillation and flutter, increasing embolism and stroke risk.
This thrombosis risk is exacerbated by interrupted anticoagulation.
Atrial myocardial stunning, a persistent risk of thrombus formation post-arrhythmia conversion, is a known phenomenon.

Observation:

A patient undergoing atrial flutter ablation developed a large LAA thrombus immediately after successful cavotricuspid isthmus ablation.
The thrombus was not present on pre-ablation transesophageal echocardiography.
This occurred despite successful restoration of sinus rhythm.

Findings:

This case demonstrates acute LAA thrombus formation occurring immediately following successful atrial flutter ablation.
Atrial stunning can lead to rapid thrombus development even after successful rhythm conversion.
The timing of thrombus formation post-ablation is faster than previously documented.

Implications:

Anticoagulation should not be interrupted prior to or during procedures aimed at converting atrial arrhythmias to sinus rhythm.
This finding underscores the need for careful monitoring of LAA thrombus risk in patients undergoing ablation.
Strategies for managing anticoagulation in patients with atrial arrhythmias require reassessment to mitigate acute thrombotic events.