This review article provides an overview on the published clinical risk scores related to outcomes of rhythm control strategy or AF progression
Patients with atrial fibrillation ( AF ) are commonly managed with rhythm control strategy , but the natural history of this common arrhythmia leads itself to progression from paroxysmal to persistent or permanent AF , and recurrences are evident despite rhythm control treatments using cardioversion or catheter ablation .
Numerous clinical factors have been associated with outcomes of rhythm control or arrhythmia progression in patients with AF .
The more common factors have been used to formulate risk stratification scores , to help predict the outcomes of rhythm control treatments  or AF progression .
Prolonged PR Interval Predicts Clinical Recurrence of Atrial Fibrillation After Catheter Ablation
Background A prolonged PR interval is known to be a poor prognostic factor in cardiovascular disease . The aim of this study was to investigate the association between PR interval and clinical outcome in patients undergoing radiofrequency catheter ablation ( RFCA ) of atrial fibrillation ( AF ) . Methods and Results We prospect ively included 576 patients with AF ( 75.5 % male , 57.8±11.6 years old , 68.8 % paroxysmal AF ) who underwent RFCA .  We analyzed preprocedural sinus rhythm ECGs obtained in the absence of antiarrhythmic drug , and all enrolled patients were categorized into 4 groups based on the quartile values of the PR interval ( 166 , 182 , and 202 ms ) , and were analyzed according to the left atrium ( LA ) volume ( CT ; Computed tomography ) , LA voltage ( NavX ) , and clinical outcome of AF ablation . Based on quartile value of PR interval , the highest quartile of PR interval ( Q4 ; PR ≥202 ms ) was oldest ( P<0.001 ) , and most likely to have persistent AF ( P<0.001 ) and hypertension ( P=0.013 ) compared with the other groups . However , there was no significant difference in LA conduction velocity and atrial effective refractory period . Q4 had the greatest LA dimension ( P<0.001 ) and volume index ( P<0.001 ) , and lowest LA appendage‐emptying velocity ( P<0.032 ) and LA voltage ( P<0.001 ) compared with the others . For 13.1±7.5 months , the classification based on the PR interval was a significant predictor of AF recurrence after RFCA of AF ( HR=1.969 , 95 % CI 1.343 to 2.886 , P=0.001 ) . Conclusions The PR interval was closely associated with advanced LA remodeling due to AF , and had a noninvasive significant predictive value of clinical recurrence of AF after RFCA
This review article provides an overview on the published clinical risk scores related to outcomes of rhythm control strategy or AF progression
Patients with atrial fibrillation ( AF ) are commonly managed with rhythm control strategy , but the natural history of this common arrhythmia leads itself to progression from paroxysmal to persistent or permanent AF , and recurrences are evident despite rhythm control treatments using cardioversion or catheter ablation .
Numerous clinical factors have been associated with outcomes of rhythm control or arrhythmia progression in patients with AF .
The more common factors have been used to formulate risk stratification scores , to help predict the outcomes of rhythm control treatments  or AF progression .