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. 2012 Apr 18;2012(4):CD007101. doi: 10.1002/14651858.CD007101.pub2

Haïssaguerre 2004.

Methods Randomised controlled trial
Participants 70 patients with drug‐refractory AF undergoing curative ablation were included. 35 patients were arranged to PV isolation group, and 30 to PV isolation plus mitral isthmus ablation group.
Age: 53+/‐8 years in PVI group, and 53+/‐9 years in PVI + Mitral isthmus ablation group. 
 % of male:26/35 ( 74.3%) in each group. 
 Follow‐up: 12 months.
Location: Bordeaux‐Pessac, France.
Interventions PV isolation compared with PV isolation plus mitral isthmus ablation
Outcomes Recurrence of AF, sinus rhythm
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk Insufficient detail was provided.
Allocation concealment (selection bias) Unclear risk B‐Unclear. The authors did not depict allocation concealment method.
Blinding High risk Blinding was not reported.
Incomplete outcome data addressed High risk There were no patients withdrawn or lost to follow up.
Adequate sequence generation Unclear risk It was not addressed.