QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by SHELTON, G. Articles by JONES, D. R. Search for Related Content PubMed PubMed Citation Articles by SHELTON, G. Articles by JONES, D. R.

Journal of Experimental Biology 43,479-488 (1965)
Published by Company of Biologists 1965

Pressure and Volume Relationships in the Ventricle, Conus and Arterial Arches of the Frog Heart

G. SHELTON ¹ and D. R. JONES ¹

¹ School of Biological Sciences, University of East Anglia, Norwich

1. Peak systolic pressures in the ventricle, conus and arterial arches differ by 1 or 2 mm. Hg only, and are reached at the same time. Pulse pressures are largest in the ventricle and smallest in the arterial arches, though their relationship to one another is variable and depends partly on heart rate.

2. The conus continues to contract after relaxation of the ventricle. Blood flow from the heart occurs during four-fifths of the cardiac cycle and stops with the closure of the valves at the top of the conus.

3. Volume changes in the conus are 5-10% of those seen in the ventricle. The conus is filled early in ventricular systole before the peak pressure is reached. The ventricle does 20 to 40 times more work than the conus in ejecting blood from the heart.

4. The conus does not serve a depulsating function or make a major contribution to blood outflow from the heart in anurans.

This article has been cited by other articles:

				D. A. Syme, A. K. Gamperl, M. H. Braun, and D. R. Jones Wave reflection effects in the central circulation of American alligators (Alligator mississippiensis): what the heart sees Am J Physiol Heart Circ Physiol, October 1, 2006; 291(4): H1670 - H1678. [Abstract] [Full Text] [PDF]

				A. Gamperl, W. Milsom, A. Farrell, and T Wang Cardiorespiratory responses of the toad (Bufo marinus) to hypoxia at two different temperatures J. Exp. Biol., January 12, 1999; 202(24): 3647 - 3658. [Abstract] [PDF]