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. Author manuscript; available in PMC: 2016 Mar 10.
Published in final edited form as: J Am Coll Cardiol. 2015 Mar 10;65(9):867–875. doi: 10.1016/j.jacc.2014.12.026

FIGURE 2. Voltage Threshold for Heart Rate Slowing.

FIGURE 2

(A) Before stimulation, sinus cycle length is 900 ms. (B) During stimulation at 20 V (note stimulation artifact), there is an increase in the sinus cycle length to 930 ms.