If an EPS reveals inducible atrial flutter as part of a substrate, what is the most likely clinical implication?

• A. It supports planning targeted ablation to interrupt the flutter circuit
• B. It indicates no need for ablation
• C. It predicts immediate cure
• D. It rules out atrial fibrillation

Answer: (A)

Inducible atrial flutter on EPS means there is a reentrant atrial circuit that can be activated in this patient. This makes planning an ablation aimed at interrupting that circuit logical, because the goal is to block the critical pathway that allows the flutter to sustain itself. In classic typical flutter, this is achieved by creating a line of block across the cavotricuspid isthmus, which often terminates the flutter and prevents recurrence. Keep in mind that success with ablation is common but not guaranteed, and the presence of flutter does not exclude other arrhythmias such as atrial fibrillation, which may require separate management.