There is limited evidence to suggest which ablation method was the best .
There is limited evidence to suggest that CA may be a better treatment option compared to medical therapies in the management of persistent AF .
This review was also unable to recommend the best CA method
BACKGROUND Atrial fibrillation ( AF ) is the most common cardiac arrhythmia seen in cardiovascular departments .
Treatments include medical interventions and catheter ablation .
Due to uncertainties in medical therapies for AF , and the need to continue sinus rhythm , ablation has been recently considered as a viable alternative .
Many new ablation methods based on pulmonary vein isolation ( PVI ) have been developed .
OBJECTIVES The primary objective of this review was to assess the beneficial and harmful effects of  catheter ablation ( CA ) in comparison with medical treatment in patients with paroxysmal and persistent AF .
The secondary objective was to determine the best regimen of CA .
Pulmonary vein isolation combined with superior vena cava isolation for atrial fibrillation ablation: a prospective randomized study.
AIMS Circumferential pulmonary vein isolation ( CPVI ) is an established strategy for atrial fibrillation ( AF ) ablation . Superior vena cava ( SVC ) , by harbouring the majority of non-pulmonary vein ( PV ) foci , is the most common non-PV origin for AF . However , it is unknown whether CPVI combined with SVC isolation ( SVCI ) could improve clinical results and whether SVCI is technically safe and feasible . METHODS AND RESULTS A total of 106 cases ( 58 males , average age 66.0 + /- 8.8 years ) with paroxysmal AF were included for ablation . They were allocated r and omly to two groups : CPVI group ( n = 54 ) and CPVI + SVCI group ( n = 52 ) . All cases underwent the procedure successfully . Pulmonary vein isolation was achieved in all cases . The procedural time and fluoroscopic time were comparable between the two groups . The mean ablation time for SVC was 7.8 + /- 2.7 min . Superior vena cava isolation was obtained in 50/52 cases . In the remaining two cases , SVCI was not achieved because of obviating diaphragmatic nerve injury . During a mean follow-up of 4 + /- 2 months , 12 ( 22.2 % ) cases in the CPVI group and 10 ( 19.2 % ) cases in the CPVI + SVCI group had atrial tachyarrhythmias ( ATa ) recurrence ( P = 0.70 ) . Nine of 12 cases in the CPVI group and 8/10 cases in the CPVI + SVCI group underwent reablation ( P = 0.86 ) , and PV reconnection occurred in 7/9 cases in the CPVI group and in 8/8 cases in the CPVI + SVCI group . All PV reconnection was reisolated by gaps ablation . There was no SVC reconnection in the CPVI + SVCI group . In two cases without PV reconnection from the CPVI group , SVC-originated short run of atrial tachycardia was identified and eliminated by the SVCI . At the end of 12 months of follow-up , 50 cases ( 92.6 % ) in the CPVI group and 49 ( 94.2 % ) in the CPVI + SVC group were free of ATa recurrence ( P = 0.73 ) . CONCLUSION In our series of paroxysmal AF patients , empirically adding SVCI to CPVI did not significantly reduce the AF recurrence after ablation . Superior vena cava isolation may be useful , however , in selected patients in whom the SVC is identified as a trigger for AF . However , because of the preliminary property of the study and its relatively small sample size , the impact of SVCI on clinical results should be evaluated in a large series of patients
There is limited evidence to suggest which ablation method was the best .
There is limited evidence to suggest that CA may be a better treatment option compared to medical therapies in the management of persistent AF .
This review was also unable to recommend the best CA method
BACKGROUND Atrial fibrillation ( AF ) is the most common cardiac arrhythmia seen in cardiovascular departments .
Treatments include medical interventions and catheter ablation .
Due to uncertainties in medical therapies for AF , and the need to continue sinus rhythm , ablation has been recently considered as a viable alternative .
Many new ablation methods based on pulmonary vein isolation ( PVI ) have been developed .
OBJECTIVES The primary objective of this review was to assess the beneficial and harmful effects of  catheter ablation ( CA ) in comparison with medical treatment in patients with paroxysmal and persistent AF .
The secondary objective was to determine the best regimen of CA .