| Objective:To study the short-/mid-term efficacy of bipolar radiofrequency modified maze during concomitant on-pump versus off-pump cardiac surgery in atrial fibrillation(AF) patients and explore a more safe and effective method for surgical management of AF.Methods:Fifty AF cases undergoing bipolar radiofrequency modified maze during concomitant cardiac surgery from Jun,2009to Dec,2010in our hospital were retrospectively analyzed, including25cases in on-pump group and25cases in off-pump group. Comparative analyses were performed with all the parameters collected during the operation,3months and3years after the operation.Results:Clinical characteristics such as sexuality, age, the duration of AF, left atrial diameter, left ventricle end-diastolic diameter and left ventricular ejection fraction presented no significant differences in two groups(P>0.05). The CPB time and aortic cross clamp time during the operation in the on-pump group were found to much shorter compared with the off-pump group (90.31±16.53min vs.107.25±17.01min, P<0.05;38.23±12.52min vs.66.58±19.79min, P<0.05). There were no differences of mechanical ventilation time, ICU monitoring time, the frequency of complication and cardiac function after operation in these two groups. The percentage of reversion to sinus rhythm in the on-pump group was higher than the off-pump group at the time of discharging from hospital as well as3years after the operation (96%vs.68%, P <0.05;88%vs.60%, P<0.05). Left atrial diameter, left ventricle end-diastolic diameter and left ventricular ejection fraction at each endpoint of observation presented no significant differences in two groups (P>0.05).Conclusion:Bipolar radiofrequency modified maze during concomitant on-pump cardiac surgery was superior to off-pump with a higher short and mid-term efficacy. |
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