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How does reflex vagal stimulation affect the electrophysiologic behavior of paroxysmal supraventricular tachycardias prior to cessation?
How does reflex vagal stimulation affect the electrophysiologic behavior of paroxysmal supraventricular tachycardias prior to cessation?
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Reflex vagal stimulation consistently causes slowing of paroxysmal supraventricular tachycardia prior to cessation, aligning with known electrophysiologic responses to acetylcholine.
The mode of cessation of 39 episodes of supraventricular tachycardias during reflex vagal stimulation was studied in 11 patients. In each instance slowing of supraventricular tachycardia was observed before its cessation. The findings are consonant with present concepts of the electrophysiologic behavior of ectopic automatic cells and reentrant pathways of conduction and their response to acetylcholine. Descriptions of the behavior of supraventricular tachycardias should be more accurate.
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Herman O. Klein (1974) studied this question.
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