Autonomic blockade and sick sinus syndrome. New concept in the interpretation of electrophysiological and Holter data.

Abstract

Autonomic blockade is commonly employed as a test of sinus node dysfunction. We compared primary and secondary atrial postpacing pauses and postextrasystolic sino-atrial responses before and after autonomic blockade in 56 patients with the clinical diagnosis of sick sinus syndrome. Pharmacological autonomic blockade was achieved by atropine 0.04 mg kg-1 and… (More)

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