Figure 4.
(A) Adenosine allows more premature extrastimuli to conduct, but with greater activation latency in a persistent AF patient. (B) In the same patient, action potential duration (APD) restitution slope is <1 at baseline (blue) and during adenosine infusion (red). In a separate persistent AF patient, an extrastimulus (210 msec) fails to induce AF during adenosine infusion. Note substantial activation latency (97 msec).