Fig. 1.

Influence of left and right sympathetic ganglia on activation recovery intervals in the anterior left ventricle. A: experimental preparation is shown, with the location of the left ventricle mapped. The high-density mapping array is shown in the inset. Representative examples of electrograms recorded at baseline and during left and right stellate ganglion stimulation (LSGS and RSGS, respectively) are also shown. B: representative electrical maps showing of the impact of RSGS and LSGS on activation recovery intervals (ARIs), a surrogate for local action potential duration (APD), are shown. Bl, baseline. C: quantifications of the differential effects of LSGS and RSGS on ARIs in sinus rhythm and during ventricular pacing are shown (n = 8, **P < 0.01, ***P < 0.001, Wilcoxon signed rank test).