Modern methods of evaluation of sinus node function by means of endocardiac electrophysiological study
Mobilij, A.; D'Annunzio, E.; Zambelli, P.
Minerva Medica 71(30): 2145-2150
1980
ISSN/ISBN: 0026-4806 PMID: 7432648 Document Number: 156900
Atropine sulfate 0.04 mg/Kg i.v. and propranolol 0.2 mg/Kg i.v. were administered to patients with SSS in an attempt to determine intrinsic heart rate (IHR). Sinus node recovery time (SNRT) was determined before and after autonomic sympathetic and parasympathetic blockade. This method could distinguish SSS patients in two groups: group I was composed of patients with extrinsic sinus node dysfunction, group II was composed of patients with intrinsic sinus node dysfunction. We conclude that this differentiation is of great importance for clinical-prognostic evaluation and therapeutic program in SSS.