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. 2014 May 23;307(3):H437–H447. doi: 10.1152/ajpheart.00039.2014

Fig. 7.

Fig. 7.

Intracardiac-only RR estimation, using RV1CS1, RV1CS7, and CS1CS7 bipolar leads. A: absolute error and percentage of missed detections (means ± SD) at tidal volumes of 500 and 750 ml, averaged across all animals. Only 1 RR intervention was improperly detected, resulting in an overall accuracy of 99.1%. B: estimated vs. true RR employing either nonrounded (●) or rounded (■) RR estimates (means ± SD), compiled across all animals and tidal volumes. The rounded respiration estimates closely track the true RR, with goodness-of-fit R2 statistic of 0.97. C: average SNR of the 6 RV-CS lead combinations. The CS71/RV1CS1 lead combinations trended higher than the RV1CS1/CS71 lead combinations, which trended higher than the CS71/RV1CS7 lead combinations. Indeed, 42.86% of the optimized lead configurations use a combination of the CS71 and RV1CS1 leads, 32.38% of the optimized lead configurations use a combination of the RV1CS1 and CS71 leads, and 24.76% of the optimized lead configurations use a combination of the CS71 and RV1CS7 leads.