Which nerve needs to be avoided when ablating near the right pulmonary veins?

Which nerve needs to be avoided when ablating near the right pulmonary veins?

• A. The phrenic nerve
• B. The vagus nerve
• C. The left phrenic nerve
• D. The right recurrent laryngeal nerve

Answer: (A)

During ablation near the right pulmonary veins, the structure most at risk is the right phrenic nerve, which runs along the pericardium on the right side and lies very close to the right pulmonary veins, especially near the right superior vein. Injury to this nerve can cause diaphragmatic paralysis on that side, leading to significant respiratory compromise during the procedure. To prevent this, clinicians pace the phrenic nerve from the SVC or right atrium to monitor diaphragmatic capture and will pause or adjust energy if diaphragmatic movement wanes. The other nerves mentioned are not typically in the immediate ablation field for the right pulmonary veins: the vagus nerve and its trunk are deeper and more posterior, the right recurrent laryngeal nerve tracks near the aortic arch and tracheoesophageal groove, and the left phrenic nerve runs along the left pericardium and near the left-sided veins.

During ablation near the right pulmonary veins, the structure most at risk is the right phrenic nerve, which runs along the pericardium on the right side and lies very close to the right pulmonary veins, especially near the right superior vein. Injury to this nerve can cause diaphragmatic paralysis on that side, leading to significant respiratory compromise during the procedure. To prevent this, clinicians pace the phrenic nerve from the SVC or right atrium to monitor diaphragmatic capture and will pause or adjust energy if diaphragmatic movement wanes. The other nerves mentioned are not typically in the immediate ablation field for the right pulmonary veins: the vagus nerve and its trunk are deeper and more posterior, the right recurrent laryngeal nerve tracks near the aortic arch and tracheoesophageal groove, and the left phrenic nerve runs along the left pericardium and near the left-sided veins.