Response to Adenosine Differentiates Focal From Macroreentrant Atrial Tachycardia

42 consecutive patients (43 atrial tachycardias), mean age 59+/-15 years, 26 female, whose mechanism of AT was characterized by pharmacological perturbation, entrainment, 3D electroanatomic mapping, and results of radiofrequency ablation.

Adenosine administered during atrial tachycardia at doses sufficient to result in AV block.

Termination or transient suppression of atrial tachycardia in response to adenosine.surrogate