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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Heart Rhythm. 2015 Dec 19;13(4):983–991. doi: 10.1016/j.hrthm.2015.12.030

Figure 2. Relaxin treatment (RLX) significantly decreases AF inducibility in aged rats.

Figure 2

A: Representative action potential (AP) tracing in an aged rat. A premature pulse (S1–S2 interval 45 ms) elicits a transient episode of AF. B/C: When a shorter S1–S2 interval of 40 ms is delivered, sustained AF is induced. D: Representative AP tracing in an RLX treated aged rat. A premature pulse (S1–S2 interval 45 ms) is longer than the refractory period and captures. E: When an S1–S2 impulse which is shorter than the refractory period is delivered, no capture occurs. F: Burst pacing was unable to elicit AF in RLX treated aged rats.