RF ablation at the posterior left atrial wall poses a risk to which adjacent structure?

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Multiple Choice

RF ablation at the posterior left atrial wall poses a risk to which adjacent structure?

Explanation:
The posterior left atrial wall sits directly in front of the esophagus, so radiofrequency energy delivered there can heat the esophagus and cause injury, potentially leading to a dangerous atrioesophageal fistula. This close anatomical relationship makes the esophagus the structure at greatest risk during posterior wall ablation. The right phrenic nerve is not in this location and is more of a concern with ablations near the right-sided veins; the coronary sinus and left ventricle are nearby but not the immediate neighbor behind the posterior left atrial wall, so they are less likely concerns in this specific context.

The posterior left atrial wall sits directly in front of the esophagus, so radiofrequency energy delivered there can heat the esophagus and cause injury, potentially leading to a dangerous atrioesophageal fistula. This close anatomical relationship makes the esophagus the structure at greatest risk during posterior wall ablation. The right phrenic nerve is not in this location and is more of a concern with ablations near the right-sided veins; the coronary sinus and left ventricle are nearby but not the immediate neighbor behind the posterior left atrial wall, so they are less likely concerns in this specific context.

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