Skip to main content
. 2016 May 5;11(5):e0154077. doi: 10.1371/journal.pone.0154077

Fig 2. Activation mapping of ectopic action potentials (APs) originating in the left atrial posterior wall (LAPW).

Fig 2

(a) Raw voltage sensitive fluorescence trace demonstrating ectopic APs in the LA (upper). The corresponding activation map for the ectopic APs is shown (lower) and illustrates the source of the ectopic AP originating in the LAPW. (b) A raw voltage sensitive fluorescence trace (upper) taken from another preparation that was stimulated in the left atrial appendage (LAA). The stimulated AP activation map originates from the LAA stimulation site (lower left), whilst the ectopic AP originates in the LAPW (lower right). Thus, ectopy is not dependent on close proximity to the stimulus electrode. (c) Number of LA that developed spontaneous ectopic activity with the source in the LAA or LAPW. *denotes P<0.05, Fisher’s exact test, N = 14 LA.