D. Restoration of sinus rhythm for monophasic vs. biphasic waveforms .
Another study showed that PVI result ed in long-term restoration
Atrial fibrillation ( AF ) is a major public health problem in the United States .
More than 2.3 million Americans are estimated to have AF ( 1 ) .
The known association between AF and substantial mortality , morbidity , and health care costs compounds the effect of this condition .
Not only is the risk for death in patients with AF twice that of patients without it , but AF can result in myocardial ischemia and infa rct ion , exacerbate heart failure ( HF ) , and cause tachycardia-induced cardiomyopathy if the ventricular rate is not well-controlled ( 25 ) .
The most dreaded complication of AF is thromboembolism , especially stroke ( 6 ) .
In some patients , AF or therapies to manage this condition can severely depreciate quality of life ( 710 ) .
Furthermore , the management of AF and its complications is responsible for nearly $ 16 billion in additional costs to the U.S. health care system per year ( 11 ) .
We conducted this systematic review to evaluate the comparative safety and effectiveness of rate- versus rhythm-control strategies ;  medications used for ventricular rate control ; strict versus more lenient rate-control strategies ; nonpharmacologic rate-control therapies  versus medications ; electrical cardioversion and antiarrhythmic medications  for restoration of sinus rhythm ;  and  catheter ablation , surgical ablation , and antiarrhythmic medications  for maintenance of sinus rhythm .
Long-Term Clinical Results of 2 Different Ablation Strategies in Patients With Paroxysmal and Persistent Atrial Fibrillation
Background — Data regarding the long-term efficacy of atrial fibrillation ( AF ) ablation are still lacking . Methods and Results —Two hundred four consecutive patients symptomatic for paroxysmal or persistent/permanent AF were r and omly assigned to 2 different ablation schemes : pulmonary vein isolation ( PVI ) and PVI plus left linear lesions ( LL ) . Primary end point was to assess the maintenance of sinus rhythm ( SR ) after procedures 1 and 2 in the absence of antiarrhythmic drugs in a long-term follow-up of at least 3 years . Paroxysmal AF — With a single procedure at 12-month follow-up , 46 % of patients treated with PVI maintained SR , whereas at 3-year follow-up , 29 % were in SR ; using the “ PVI plus LL ” at the 12-month follow-up , 57 % of patients were in SR , whereas at the 3-year follow-up , 53 % remained in SR . After a second procedure , the long-term overall success rate without antiarrhythmic drugs was 62 % with PVI and 85 % with PVI plus LL . Persistent/Permanent AF — With a single procedure at the 12-month follow-up , 27 % of patients treated with PVI were in SR , whereas at the 3-year follow-up , 19 % maintained SR ; using the PVI plus LL with a single procedure at the 12-month follow-up 45 % of patients were in SR , whereas at the 3-year follow-up , 41 % remained in SR . After a second procedure , the long-term overall success rate without antiarrhythmic drugs was 39 % with PVI and 75 % with PVI plus LL . Conclusions —A long-term follow-up of AF ablation shows that short-term results can not be considered permanent because AF recurrences are still present after the first year especially in patients who have had “ PVI ” strategy .  PVI isolation plus LL is superior to the PVI strategy in maintaining SR without antiarrhythmic drugs after procedures 1 and 2 both in paroxysmal and persistent AF
D. Restoration of sinus rhythm for monophasic vs. biphasic waveforms .
Another study showed that PVI result ed in long-term restoration
Atrial fibrillation ( AF ) is a major public health problem in the United States .
More than 2.3 million Americans are estimated to have AF ( 1 ) .
The known association between AF and substantial mortality , morbidity , and health care costs compounds the effect of this condition .
Not only is the risk for death in patients with AF twice that of patients without it , but AF can result in myocardial ischemia and infa rct ion , exacerbate heart failure ( HF ) , and cause tachycardia-induced cardiomyopathy if the ventricular rate is not well-controlled ( 25 ) .
The most dreaded complication of AF is thromboembolism , especially stroke ( 6 ) .
In some patients , AF or therapies to manage this condition can severely depreciate quality of life ( 710 ) .
Furthermore , the management of AF and its complications is responsible for nearly $ 16 billion in additional costs to the U.S. health care system per year ( 11 ) .
We conducted this systematic review to evaluate the comparative safety and effectiveness of rate- versus rhythm-control strategies ;  medications used for ventricular rate control ; strict versus more lenient rate-control strategies ; nonpharmacologic rate-control therapies  versus medications ; electrical cardioversion and antiarrhythmic medications  for restoration of sinus rhythm ;  and  catheter ablation , surgical ablation , and antiarrhythmic medications  for maintenance of sinus rhythm .