Peripheral resistance after cardiac output reduction in the barodenervated cat.

Peripheral resistance after cardiac output reduction in the barodenervated cat.

Studies on the nervous or humoral control of total peripheral resistance are often complicated by concomitant changes in cardiac output. We studied the influence of cardiac output on peripheral resistance in the absence of modulating reflexes. In barodenervated and vagotomized cats, cardiac output was varied by graded inferior caval vein occlusion or by arterial bleeding. Total peripheral resis...

Cardiac output and total peripheral resistance in carotid sinus reflex.

SCHMIDT,ROBERT M., MAMORU KUMADA, AND KIICHI SAGAWA. Cardiac output and total peripheral resistance in carotid sinus reflex. Am. J. Physiol. 221(Z) : 480-487. 197 1 .-The sensitivity of the carotid sinus baroreceptor reflex to step change in sinus pressure was studied in anesthetized dogs, with emphasis on the relative contributions of cardiac output (CO) and total peripheral resistance (TPR) i...

Relationship between cardiac output and peripheral resistance in borderline hypertension.

Cardiac output and total peripheral resistance in spontaneously hypertensive rats.

ESPITE extensive studies on spontaneously hypertensive rats, there have been no studies on the cardiac output except a preliminary work by Albrecht et al,4) which reported a decreasing tendency of cardiac output with age. These authors employed the Stewart-Hamilton principle for the measurement of cardiac output. An attempt was made in this study to measure cardiac output in SHR by applying an ...

Cardiac output and peripheral resistance during larval development in the anuran amphibian Xenopus laevis.

Stroke volume (SV) and cardiac output (CO) were measured in anesthetized larvae of Xenopus laevis from hatching (3 mg) to the end of metamorphosis (approximately 1 g). CO and SV were calculated from videotaped images of the intact beating heart. SV increased from 2.4 x 10(-3) microliters at 3 mg body mass to 7.6 microliters at 1 g. CO increased from 0.25 microliter/min at 3 mg to 623 microliter...