| Autor: |
Robert L. Van Citters, William S Kemper, Dean L. Franklin |
| Rok vydání: |
1968 |
| Předmět: |
|
| 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: |
|
