CardioFocus HeartLight Post-Approval Study

This study is tracking real-world results of a laser-based heart procedure called pulmonary vein isolation (using the HeartLight system) to treat paroxysmal atrial fibrillation — a condition where the heart beats in an irregular, rapid rhythm that comes and goes. **You may be eligible if...** - You are 18 years or older - You have symptomatic paroxysmal atrial fibrillation (irregular heartbeat that starts and stops on its own) - At least one medication to control your heart rhythm has not worked - You are scheduled for a catheter-based heart procedure to correct the irregular rhythm **You may NOT be eligible if...** - You have certain other heart or health conditions that make this procedure unsuitable (assessed by your doctor) - You have had certain prior heart procedures or conditions affecting the pulmonary veins Talk to your doctor to see if this trial is right for you.