Editorial note: The following quiz is related to the article “Sequential approach for the prevention of phrenic nerve injuries during epicardial radiofrequency ablation of ventricular tachycardia, Kenichi Tani and colleagues in the July 2023 issue of Heart Rhythm Case Reports.

Which of the following reasons is true regarding epicardial ablation failure?

Which of the following left ventricle (LV) epicardial area is typically located closest to the left phrenic nerve?

What is the most important point to note during the saline injection into the epicardial space to prevent phrenic nerve injury?

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