Effects of propranolol on ventricular repolarization in man.

Abstract:

:The acute effects on monophasic action potentials (MAP), QT interval, and right ventricle effective refractory period (V-ERP) of propranolol 0.2 mg.kg-1 body weight have been studied in 10 patients with coronary artery disease. The median duration of MAP at 90% repolarization (MAP90) was shortened from 238 to 228 ms at a constant paced heart rate of 100 beats.min-1, while V-ERP remained unchanged. The median ratio V-ERP/MAP90 increased from 1.00 to 1.03. The electrical restitution curves of the duration of premature action potentials, normalized to those paced at constant heart rate, were more horizontal after propranolol. Isometric handgrip shortened MAP90 from 217 to 211 ms and after propranolol similar shortening was found (215 to 209 ms), although both values were slightly lower than before beta-blockade.

journal_name

Eur J Clin Pharmacol

authors

Endresen K,Amlie JP

doi

10.1007/BF00280044

subject

Has Abstract

pub_date

1990-01-01 00:00:00

pages

123-5

issue

2

eissn

0031-6970

issn

1432-1041

journal_volume

39

pub_type

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