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Parasympathetic response elicited during a 4.85 second burst of high-frequency stimulation (HFS) applied to the ganglionated plexi (GP). (A) An atrioventricular block lasting 7.85 seconds was induced by HFS. The ventricular conduction quickly returned after the HFS was terminated. (B) The cardiac response to the GP stimulation was eliminated by radiofrequency ablation.
