Atrial Fibrillation Clinical Trial
Official title:
Study of Cryomaze Procedure Using Nitrous Oxide Versus Argon Gas
The aim of this study is compare the surgical convenience and early and long-term outcomes of
cryomaze procedure using nitrous oxide with using Argon gas.
The investigators will analyze the pathologic findings of atrial tissue after cryoablation
using two probes and early and long-term outcomes with Holter monitoring. Atrial fibrillation
burden 3 months and 1 year postoperatively and atrial activity will be checked.
The investigators have used the Medtronic ATS cryoprobe (Argon based) since 2009 for cryomaze
procedure for treatment of atrial fibrillation combined with valvular heart disease.
However, sometimes, it was inconvenient due to excess flexibility, wide lesion related to
excess low temperature and time-consuming detachment from atrium after cryoablation. The
investigators introduced Atricure cryoprobe (Nitreos Oxide based) in hope of overcoming these
shortcomings of ATS probes last year.
Up to date, the investigators have been satisfactory in terms of the surgical convenience. On
the other hand, we have the questionability of transmural lesion of Atricure probe because of
the higher temperature of Atricure probe compared with ATS probe.
The aim of this study is compare the surgical convenience and early and long-term outcomes of
cryomaze procedure using nitrous oxide with using Argon gas.
The investigators will analyze the pathologic findings of atrial tissue after cryoablation
using two probes and early and long-term outcomes with Holter monitoring. Atrial fibrillation
burden 3 months and 1 year postoperatively and atrial activity will be checked.
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