Pulmonary circulation of the harbor seal
| Autor: | E. E. Sinnett, Eric A. Wahrenbrock, Gerald L. Kooyman |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Male
Pulmonary Circulation Cardiac output Time Factors Seals Earless Systole Physiology Diving Diastole Blood Pressure Anesthesia General Heart Rate Physiology (medical) Heart rate Animals Medicine Cardiac Output Thiopental biology business.industry Central venous pressure Stroke volume respiratory system biology.organism_classification Caniformia Oxygen Blood pressure Anesthesia Harbor seal Female Halothane business human activities |
| Zdroj: | Journal of Applied Physiology. 45:718-727 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.1978.45.5.718 |
| Popis: | Cardiac output (Q) and pulmonary arterial pressure (Ppa) were measured under various conditions in four harbor seals (Phoca vitulina) weighing 35--52 kg. In seals anesthetized with halothane, Q averaged 3.47 l/min; in awake resting seals, Q averaged 11.5 l/min; and during surface dives (i.e., at atmospheric pressure) Q averaged 1.99 l/min. Stroke volume was one-third and two-thirds of the awake resting value during anesthesia and diving, respectively. Systolic Ppa was usually 40--50 Torr in anesthetized and awake resting seals, but was about 10 Torr lower during both surface and compression (i.e., elevated ambient pressure) dives. Diastolic Ppa was constant and high during anesthesia and quite variable in awake resting seals. During both surface and compression dives the diastolic Ppa often fell to the same level as right atrial pressure. We conclude that Q and Ppa are high in awake resting seals and that pulmonary blood flow may cease between beats during diving. |
| Databáze: | OpenAIRE |
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