TY - JOUR
T1 - Heart Rate, Stroke Volume and Vasomotor Regulation in the Cat during Exertion and Postural Changes
AU - Mancia, Giuseppe
AU - Baccelli, Giorgio
AU - Adams, David B.
AU - Zanchetti, Alberto
PY - 1970
Y1 - 1970
N2 - Abstract The cat, when its peripheral metabolic demands are augmented, has a limited capacity to increase its heart rate, but often responds with a considerable rise in stroke volume: stroke volume can be increased by active changes of posture from lying to standing, by a short or prolonged bout of fighting, and by mild exercise on the treadmill. In all these conditions stroke volume attains values larger than those measured during recumbent rest. It appears therefore that an increase in stroke volume is a mechanism ordinarily called upon in the cat when natural behaviour requires an increase in cardiac output, while in man it is called upon in extraordinary conditions only. However, the fact that a stroke volume regulating mechanism is ordinarily operative in the cat shows that it has a physiological significance, and supports the idea that in man also exertion is accompanied by a masked stimulation of myocardial contractility. A description is also presented of the vasomotor changes produced by active changes in posture.
AB - Abstract The cat, when its peripheral metabolic demands are augmented, has a limited capacity to increase its heart rate, but often responds with a considerable rise in stroke volume: stroke volume can be increased by active changes of posture from lying to standing, by a short or prolonged bout of fighting, and by mild exercise on the treadmill. In all these conditions stroke volume attains values larger than those measured during recumbent rest. It appears therefore that an increase in stroke volume is a mechanism ordinarily called upon in the cat when natural behaviour requires an increase in cardiac output, while in man it is called upon in extraordinary conditions only. However, the fact that a stroke volume regulating mechanism is ordinarily operative in the cat shows that it has a physiological significance, and supports the idea that in man also exertion is accompanied by a masked stimulation of myocardial contractility. A description is also presented of the vasomotor changes produced by active changes in posture.
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U2 - 10.1111/j.1365-2362.1970.tb00614.x
DO - 10.1111/j.1365-2362.1970.tb00614.x
M3 - Article
AN - SCOPUS:84985773434
VL - 1
SP - 172
EP - 179
JO - European Journal of Clinical Investigation
JF - European Journal of Clinical Investigation
SN - 0014-2972
IS - 3
ER -