It was reported that during a concomitant aortic valve replacement procedure, transmurality on the unit was not recognized when tissue had been ablated.The surgeon stated after performing many ablations it kept going to 30 seconds.By doing so many ablations and the machine not recognizing when transmurality was complete, a hole in the atrium was formed and bleeding had begun once by-pass was reversed.The tear was closed with a bovine pericardial patch and the procedure completed.The patient made an uneventful recovery thereafter with no long term adverse consequence.
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