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 .
Left mitral isthmus ablation associated with PV Isolation: long-term results of a prospective randomized study.
BACKGROUND The deployment of an ablation line connecting the left inferior PV to the mitral annulus ( mitral isthmus line [ MIL ] ) enhances the efficacy of pulmonary vein disconnection ( PVD ) in preventing atrial fibrillation ( AF ) recurrences . OBJECTIVES To investigate the long-term effect of the additional linear lesion in a prospect i ve r and omized study . METHODS One hundred and eighty-seven patients ( 37 females , mean age : 55 + /- 11 years ) with paroxysmal ( 126 ) or persistent ( 61 patients ) AF , were prospect ively r and omized into two groups : PVD ( group A , 92 patients ) or PVD combined with MIL ( group B , 95 patients ) , performed by means of an irrigated-tip ablation catheter . RESULTS Successful disconnection of all PVs was achieved in all patients . A bidirectional block ( BB ) along the left atrial isthmus was obtained in 72 of 95 ( 76 % ) patients in group B , most of whom required additional RF pulses from within the distal CS . A transient ischemic attack occurred in 1 patient of group A , and a cardiac tamponade occurred in 1 patient of group B. At 1 year , 53 + /- 5 % ( group A ) and 71 + /- 5 % ( group B ) remained arrhythmia free ( P = 0.01 ) ; subgroup analysis highlights a higher improvement among patients with persistent AF ( 74 + /- 9 % vs 36 + /- 9 % ; P < 0.01 ) than what was observed in paroxysmal AF ( 76 + /- 6 % vs 62 + /- 6 % ; P < 0.05 ) ; antiarrhythmic drugs were continued in 56 % and 50 % , respectively , in groups A and B ( P = ns ) . CONCLUSIONS The addition of mitral isthmus line to the PV disconnection allows a significant improvement of sinus rhythm maintenance rate , particularly in patients with persistent AF , without the risk for major complications
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 .