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[The chronotropic effect of maximal stress on the heart and its regulation].

Authors
  • Pshennikova, M G
Type
Published Article
Journal
Fiziologicheskiĭ zhurnal SSSR imeni I. M. Sechenova
Publication Date
Apr 01, 1976
Volume
62
Issue
4
Pages
566–572
Identifiers
PMID: 6345
Source
Medline
License
Unknown

Abstract

The reflex bradycardia occurring at the maximal isometric heart strain produced by clamping of aorta was shown to be less intense if the heart rate prior to the experiment had been low. Vagotomy prevented or decreased the bradycardia. The beta-adrenoreceptor blockade with inderal significantly reduced the bradycardia, whereas the alpha-adrenoreceptor blockade with tropaphen increased it. The important role of relationship between adrenergic and cholinergic regulation of the heart in development of the bradycardia was discussed.

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