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ARTICLE |

THE ACTION OF THE VAGI ON THE HEART IN PAROXYSMAL TACHYCARDIA

G. CANBY ROBINSON, M.D.
Arch Intern Med (Chic). 1915;XVI(6):967-974. doi:10.1001/archinte.1915.00080060079006.
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The influence of the vagi on the heart in paroxysmal tachycardia is of interest because of the possible causative rôle derangements of the nervous mechanism controlling heart rate may play in the disease, and because vagus stimulation may in some cases bring about a cessation of the tachycardia. I wish to consider this influence from a somewhat different point of view, as it seems possible to draw certain inferences concerning the mode of action of the vagi, by comparing cases in which vagus stimulation by pressure is effectual in stopping the tachycardia with those in which it is ineffectual.

Cohn and Fraser1 have reported two cases of paroxysmal tachycardia which could be stopped by pressure over the vagi, one case apparently of auricular origin in which the right vagus was especially effectual, and the other apparently of ventricular origin in which the left vagus was more effectual

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