© 1966 American Heart Association, Inc.
Left Ventricular Ejection in Conscious Dogs:
II. Determinants of Stroke Volume
1 Department of Medicine, Charing Cross Hospital Medical School, Fulham Hospital London, W.6, England
Some factors affecting stroke volume were investigated in conscious dogs in which left ventricular outflow was measured with an electromagnetic flowmeter. Stimulation of the heart at constant heart rate, by intracoronary injections of calcium gluconate and isopropylnorepinephrine, or postectopic potentiation failed to produce any increase in stroke volume. By contrast, alterations of posture at constant heart rate with the presumed associated changes in end diastolic dimensions, produced large changes in stroke volume. This resulted from a change in late systolic flow.
Key Words: stroke volume • myocardial contractility • paired pulse potentiation • calcium gluconate • isopropylnorepinephrine • posture • momentum of blood • unanesthetized dogs
Accepted on February 7, 1966
This article has been cited by other articles:
 |
|
 |
|
  P. J. Winter, D. C. Deuchar, M. I. M. Noble, D. Trenchard, and A. Guz Relationship Between the Ballistocardiogram and the Movement of Blood from the Left Ventricle in the Dog Cardiovasc Res, April 1, 1967; 1(2): 194 - 200. [Abstract] [PDF]
|
|
|
|
 |
|
 K. Makikallio, O. Vuolteenaho, P. Jouppila, and J. Rasanen Ultrasonographic and Biochemical Markers of Human Fetal Cardiac Dysfunction in Placental Insufficiency Circulation, April 30, 2002; 105(17): 2058 - 2063. [Abstract] [Full Text] [PDF]
|
|