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. 2022 Jan 13;3(1):91–96. doi: 10.1016/j.hroo.2022.01.003

Figure 1.

Figure 1

Simultaneous recordings from selected atrial sites (right atrial appendage [RAA], Bachmann's bundle [BB], and posterior left atrium [PLA]) during postoperative atrial fibrillation (POAF) in the canine sterile pericarditis model (the first episode in dog #8 in Table 1). Electrocardiogram lead II shows an irregular baseline with an absence of P waves and atrial electrograms (AEGs) from the RAA, demonstrating changing morphology of AEGs consistent with POAF. AEGs from BB and the PLA show regular morphology and cycle length. S = stimulus artifact during ventricular pacing after the creation of the atrioventricular block.