Multisite pacing for prevention of atrial tachyarrhythmias: potential mechanisms
Ruediger Becker, MDa,
Reinhard Klinkotta,
Alexander Bauer, MDa,
Julia C. Senges, MDa,
Kirsten D. Schreiner, MDa,
Frederik Voss, MDa,
Wolfgang Kuebler, MD, FACCa and
Wolfgang Schoels, MDa
a University of Heidelberg, Department of Cardiology, Heidelberg, Germany

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Figure 1 (Panel A) Posterior view of the atria with multielectrode in place. The shaded areas represent the location of pacing electrodes. (Panels BG) Atrial activation maps obtained during different pacing modes at a cycle length of 250 ms (dog #12). See text for further details. AVR = atrioventricular ring; HLA = high left atrium; HRA = high right atrium; IVC = inferior caval vein; LA = left atrium; LAA = left atrial appendage; LLA = low left atrium; LRA = low right atrium; RA = right atrium; RAA = right atrial appendage; PV = pulmonary veins; SVC = superior caval vein; = stimulation site.
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Figure 2 Effects of multisite pacing on unidirectional functional conduction blocks (dog #11): (panel A) = functional conduction block during HRA pacing; (panel B) = intercaval block during dual-site right atrial pacing; (panel C) = resolution of conduction block during triple-site pacing. Abbreviations as in Figure 1.
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