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Two-year follow-up comparing freedom from AF off antiarrhythmic drugs after a stand-alone Cox-Maze IV procedure and a concomitant CMIV + MV procedure. At six months, P=0.034 when comparing lone CMIV to concomitant CMIV + mitral operation. At all other time points there were no significant differences (P>0.2). CMIV, Cox-Maze IV; MV, mitral valve; AF, atrial fibrillation.
