What should be tagged during an ablation procedure to avoid damaging the phrenic nerve?

During an ablation procedure, it is crucial to identify and tag specific spots close to the phrenic nerve to avoid damage. The phrenic nerve is responsible for diaphragm movement and innervation and is located in close proximity to the heart, particularly near the right atrium. If the ablation inadvertently affects the phrenic nerve, it can lead to complications such as diaphragmatic paralysis, which can severely impair respiratory function. Thus, tagging these specific spots enables the electrophysiologist to work carefully around the nerve, ensuring its preservation throughout the procedure. This level of specificity is essential in preventing inadvertent damage while targeting the areas responsible for the atrial fibrillation.