Marrouche 2007.

Methods	Randomised controlled trial
Participants	53 Symptomatic AF patients who were followed up for 3 months. 27 patients were assigned to PVAI using the MB monitoring approach, and 26 were using the irrigated tip catheter. Paroxysmal AF accounted for 61.5% and 63% in both group respectively. Age: 53+/‐8 years in OIT catheter group, and 54+/‐8 years in ICE guidance group. % of male: 19/26 (73%) in OIT catheter group, and 21/27 (78%) in ICE guidance group. Follow‐up: three months for paroxysmal AF patients, and six months for persistent AF patients. Location: Salt Lake City, Utah, USA.
Interventions	Group 1: Open irrigation ablation technology for PV isolation. Group 2: Pulmonary vein antrum isolation under ICE guidance.
Outcomes	Sinus rhythm restored, complications
Notes	PVAI: pulmonary vein‐atrium isolation.
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Incomplete outcome data addressed	High risk	There were no patients withdrawn or lost to follow up.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.