In vivo cardiac pressure and heart rate, and relative heart mass, have been measured in Busycon canaliculatum. Base pressure was about l.3cmH2O above ambient and effectively the same in the ventricle, atrium, pericardium and veins. Ventricular systolic pressures were very variable. Highest pressure was over 80cmH2O, but sustained levels were lower, up to about 40cmH2O. Heart rate was also very variable, 5–15 beats min−1. Heart mass was about 0.19% of body mass. Cardiac refilling, control and power output are discussed.
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JOURNAL ARTICLE| 01 November 1988
In Vivo Cardiac Pressure and Heart Rate, and Heart Mass, of Busycon Canaliculatum (L.)
H. D. JONES
1Department of Zoology, University of Rhode Island, Kingston, RI02881, USA; Department of Environmental Biology, University of Manchester, Manchester, M13 9PL, UK.
Accepted: 26 May 1988
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1988 by Company of Biologists
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H. D. JONES; In Vivo Cardiac Pressure and Heart Rate, and Heart Mass, of Busycon Canaliculatum (L.). J Exp Biol 1 November 1988; 140 (1): 257–271. doi: https://doi.org/10.1242/jeb.140.1.257
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