Blood flow and pressure in the giraffe carotid artery

Autor:	Robert L. Van Citters, William S Kemper, Dean L. Franklin
Rok vydání:	1968
Předmět:	Blood velocity Chemistry Carotid arteries Transducers Diastole Hemodynamics Blood Pressure Blood flow Anatomy Blood pressure Carotid Arteries General Earth and Planetary Sciences Animals Systole Blood Flow Velocity General Environmental Science Artiodactyla
Zdroj:	Comparative biochemistry and physiology. 24(3)
ISSN:	0010-406X
Popis:	1. 1. Carotid artery blood pressure and blood flow were measured and telemetered from wild giraffes ranging freely on the African plains. 2. 2. The blood pressure ranged between 260/160 mm Hg when the animal was lying flat, and 120/75 mm Hg when it was standing upright; dp/dt at the onset of systole was 1500 mm/sec. 3. 3. Peak systolic blood velocity measured at the same site was 60 cm/sec; during diastole velocity remained above 40 cm/sec. Calculated blood flow in the carotid artery ranged between 50 cm3/sec in the prone animal, and 35 cm3/sec in the standing. 4. 4. XY plots of flow and pressure produced open clockwise loops which varied in shape with activity and posture; such phase differences probably reflect mechanical properties peculiar to the giraffe's arterial system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bd0692e7ff9e2407d8903c0f089b854 https://pubmed.ncbi.nlm.nih.gov/5650478 Zobrazit plný text záznamu