Which factor increases the risk for thromboembolism during AF ablation?

Low anticoagulant levels significantly increase the risk for thromboembolism during atrial fibrillation (AF) ablation. Atrial fibrillation is associated with an increased potential for blood clots to form in the heart, particularly in the left atrial appendage. When undergoing ablation, the procedure can create a pro-thrombotic environment; therefore, maintaining adequate levels of anticoagulation is crucial to mitigate this risk. If anticoagulant levels are low, patients are more susceptible to developing thrombi, which can lead to serious complications such as stroke or systemic embolism.

The other factors mentioned do not inherently contribute to an increased risk of thromboembolism during AF ablation. Increased patient mobility typically aids in recovery and minimizes complications. Short procedure duration generally reduces patient exposure to potential risks, including thromboembolism. Frequent monitoring improves patient safety by allowing for prompt intervention if complications arise, rather than increasing the risk of thromboembolic events. Thus, maintaining appropriate anticoagulation levels is the most critical consideration to reduce thromboembolic risk during ablation procedures.