Article thumbnail
Location of Repository

Impaired baroreflex control of vascular resistance and heart rate in acute myocardial infarction.

By T Imaizumi, A Takeshita, N Makino, T Ashihara, K Yamamoto and M Nakamura

Abstract

The baroreflex control of vascular resistance and heart rate was studied in 11 patients to determine whether it is impaired in patients with acute myocardial infarction. Reflex forearm vasoconstriction in response to lower body negative pressure at 40 mm Hg was less in the early convalescent phase (mean seven days) than in the late convalescent phase (mean 41 days). Pressor as well as vasoconstricting responses to the cold pressor test did not differ between the early and late convalescent phases. The slope of the regression line relating systolic blood pressure and the RR interval during a transient rise in blood pressure produced by intravenous phenylephrine was appreciably reduced in the early convalescent phase of myocardial infarction. These results suggest that baroreflex control of vascular resistance and heart rate is impaired in patients with acute myocardial infarction

Topics: Research Article
Year: 1984
DOI identifier: 10.1136/hrt.52.4.418
OAI identifier: oai:pubmedcentral.nih.gov:481653
Provided by: PubMed Central
Sorry, our data provider has not provided any external links therefore we are unable to provide a link to the full text.

Suggested articles


To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.