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. Author manuscript; available in PMC: 2013 Apr 24.
Published in final edited form as: Heart Rhythm. 2012 May 1;9(9):1426–33.e3. doi: 10.1016/j.hrthm.2012.04.038

Figure 4.

Figure 4

Atrial fibrillation (AF) burden is decreased in response to spinal cord stimulation. A: Average AF burden (percentage of time per week in automatic mode switch [AMS]) values plotted as a function of time. Significant differences between treatment groups were found with a 2-factor analysis of variance. The AF burden in the early (EARLY) group was significantly decreased compared with that in the control group (CTL). No differences in the AF burden were found between the control (CTL) and late (LATE) groups. B: Kaplan-Meier plots for freedom from persistent AF, defined as weekly AF burden >85%. C: Kaplan-Meier plots for freedom from first prolonged AF episode lasting at least 3 hours. *Significant difference of P <.05 compared with CTL.