Tailoring the Ablative Strategy for Atrial Fibrillation: A State-of-the-Art Review

Figure 1

“P on T” phenomena: the trigger of arrhythmia is an extra systolic nonconducted atrial beat with a negative P in D1 and aVL and a positive in D2, D3, and aVF (arrow). This suggests an origin from the left (negative P in D1 and aVL) superior (positive in D2, D3, and aVF) pulmonary vein that was confirmed by the Lasso catheter. The isolation of the left superior pulmonary vein stopped the arrhythmia.