Thromboembolic events typically occur within 48 hours of catheter ablation and usually do not lead to persistent disability. Diagnosis and treatment of these events vary according to the location of the embolus. The high incidence of thromboembolic events following the procedure has led to the use of higher-intensity periprocedural anticoagulation and targets of 2.5 for international normalized ratio (INR) and 350 seconds or more for ACT. The incidence ofstroke or transient ischemic attack after the procedure ranges from 0.2% to 1%.