Atrial Fibrillation Clinical Trial
Official title:
Cryoballoon Pulmonary Vein Isolation: Time-to-Isolation Dependent Freeze Protocols Comparison
The purpose of this study is to develop and prospectively test two Cryo-AF (atrial
fibrillation) dosing protocols guided exclusively by time-to-isolation (TT-I) in patients
undergoing a first-time Cryo-AF.
Both protocols guided by TT-I are associated with shorter cryoapplications as compared to
conventional approach.
In the first group freeze duration is TTI +120 s. In the second group freeze duration is 240s
if TTI is < 75 s. In case of TTI>75s a 240s bonus freeze is applied.
The investigators examine long-term efficacy of Cryo-AF using the two proposed dosing
algorithms in a nonrandomized fashion.
The study cohort consists of consecutive patients undergoing a first-time Cryo-AF for
symptomatic paroxysmal or persistent AF (atrial fibrillation) at Interventional Cadiology and
Cardiac Arrhythmias Clinic of Medical University in Łódź. During 12 months investigators are
planning to enroll 40 patients Patients are randomly assigned to the groups. All of them will
be followed up 3 and 12 months after the procedure. In addition, ambulatory
electrocardiographic monitoring will also be performed at 3 and 12 months.
The study is requested for an approval of the university ethics committee.
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