ASL = anteroseptal line (line between mitral annulus and right superior pulmonary vein); AT = atrial tachycardia; AVNRT = atrioventricular nodal reentrant tachycardia; CTI = cavotricuspid isthmus; IVC = inferior vena cava; LA = left atrium; LIPV = left inferior pulmonary vein; LSPV = left superior pulmonary vein; MAL = modified anterior line (line between mitral annulus and left superior pulmonary vein); PVI = pulmonary vein isolation; RIPV = right inferior pulmonary vein; RSPV = right superior pulmonary vein; STD = spatiotemporal dispersion; SVC = superior vena cava.

* Sites with spatiotemporal dispersion plus non-continuous fractionation were only mapped if no rotors were present or if rotor ablation was ineffective.

† Spontaneous conversion from AF to stable AT occurred after rotor mapping in the left atrium was completed (no rotors were found).

Table 3. Clinical and procedural variables of patients with and without recurrences of atrial arrhythmias.