Functional substrate mapping effectively identifies the critical isthmus of atrial tachycardia.
The study mapped 36 atrial tachycardias with an 80.8% predictive value for identifying critical isthmus.
Deceleration zones in low-voltage regions guide tailored ablation strategies for treating atrial scar.
Despite macro-re-entry being common, findings highlight the significance of functional substrate mapping for non-cavotricuspid isthmus-dependent tachycardias.