Accession Number : AD0720809

Title :   Effect of Aortic Impedance on Heart Performance in Conscious Dogs.

Descriptive Note : Final rept. Feb 69-Aug 70,

Corporate Author : TEXAS UNIV MEDICAL SCHOOL SAN ANTONIO DEPT OF PHARMACOLOGY

Personal Author(s) : Bishop,Vernon S.

Report Date : FEB 1971

Pagination or Media Count : 22

Abstract : With the conscious dog as a model, various hemodynamic factors thought to influence the performance of the heart were evaluated. Contrary to many theories, the effects of aortic hydraulic impedance were small in comparison with the effects of heart rate and venous filling pressure. Although the d.c. impedance could, on occasion, exert significant influence on the performance of the heart, the a.c. component was negligible. (Author)

Descriptors :   (*HEART, *PHYSIOLOGY), (*BLOOD CIRCULATION, HEART), CARDIOVASCULAR SYSTEM, AORTA, ARTERIES, BLOOD VESSELS, BLOOD PRESSURE, VEINS, DOGS

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE