What maps should you create for Aflutter?

• A. Activation map and voltage map
• B. Isochoric map
• C. P-wave map
• D. QRS morphology map

Answer: (A)

Atrial flutter mapping focuses on the timing and path of atrial activation and the underlying tissue substrate that sustains the circuit. An activation map shows the sequence of electrical activation across the atria, revealing the macro-reentrant loop and identifying the critical slow-conduction areas that ablation targets. A voltage map complements this by highlighting regions of low voltage or scar, which can anchor or shape the flutter circuit. Together, they provide the essential view of both how activation propagates and where the substrate enables that propagation. Mapping surface P waves or QRS morphology isn’t as helpful for intracardiac activation patterns in atrial flutter, and while isochronal representations exist, the primary, most informative pair for flutter is activation and voltage mapping.