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 .
Small or Large Isolation Areas Around the Pulmonary Veins for the Treatment of Atrial Fibrillation?: Results From a Prospective Randomized Study
Background — Pulmonary vein ( PV ) isolation is a promising new treatment for  atrial fibrillation ( AF ) . We hypothesized that isolation of large areas around both ipsilateral PVs with verification of conduction block is more effective than the isolation of each individual PV . Methods and Results — A total of 110 patients , 67 with paroxysmal AF and 43 with persistent AF , were r and omly assigned to undergo either isolation of each individual PV or isolation of large areas around both ipsilateral PVs . The isolation of each individual PV was an electrophysiologically guided , ostial segmental ablation with a 64-pole basket catheter or a 20-pole circular mapping catheter ( group I ) . Isolation of large areas was performed around the 2 ipsilateral veins with a nonfluoroscopic navigation system and a circular 20-pole mapping catheter for verification of conduction block ( group II ) . In both groups , an irrigated-tip ablation catheter ( 25 to 35 W ) was used to achieve complete isolation . Procedure and ablation times were longer in group II , whereas fluoroscopic time was significantly shorter ( P≤0.001 ) . After a follow-up period of 15±4 months , 27 patients in group I ( 49 % ) and 37 patients in group II ( 67 % ) remained free of symptoms of AF and had no AF or atrial flutter during repetitive Holter monitoring without antiarrhythmic drug treatment after a single procedure ( P≤0.05 ) . Conclusions — The rate of success was significantly higher and fluoroscopy times were significantly lower in the group with large isolation areas around both ipsilateral PVs than in those who underwent individual PV isolation
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 .