Esophageal Temperature During PVI Using Q-DOT Micro

This study is monitoring the temperature of the esophagus (the tube connecting your throat to your stomach) during a heart procedure called pulmonary vein isolation (PVI) — a catheter ablation treatment for atrial fibrillation (an irregular heartbeat). The esophagus sits very close to the heart, and this study aims to assess safety during the procedure. **You may be eligible if...** - You are 18 or older - You have been diagnosed with paroxysmal atrial fibrillation (episodes of irregular heartbeat that come and go) - You are scheduled for your first catheter ablation procedure using radiofrequency energy (a specific type of PVI) **You may NOT be eligible if...** - You have had a prior left atrial ablation procedure - You have conditions that make capsule endoscopy (a small swallowable camera) unsafe, such as esophageal narrowing or inflammatory bowel disease - Your physician determines the specific ablation catheter being studied would be unsafe for you Talk to your doctor to see if this trial is right for you.