Pressure and heart rate responses to raised carotid pressure in the toad
Neither transient nor steady occlusion of the bilateral carotid arterial trunks had noticeable effects on blood pressure or heart rate of the toad Bufo arenarum Hensel. Distension of isolated carotid labyrints had no circulatory effects, whereas distension of unisolated carotid trunks by fluid infus...
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1979
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03636135_v6_n6_pH639_Segura http://hdl.handle.net/20.500.12110/paper_03636135_v6_n6_pH639_Segura |
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paper:paper_03636135_v6_n6_pH639_Segura2023-06-08T15:35:28Z Pressure and heart rate responses to raised carotid pressure in the toad animal experiment blood pressure cardiovascular system carotid artery pressure carotid sinus pressoreceptor heart heart rate tachycardia Neither transient nor steady occlusion of the bilateral carotid arterial trunks had noticeable effects on blood pressure or heart rate of the toad Bufo arenarum Hensel. Distension of isolated carotid labyrints had no circulatory effects, whereas distension of unisolated carotid trunks by fluid infusion caused an increase in blood pressure proportional to the applied pressure. A simultaneous tachycardia was recorded. These circulatory effects seem to depend on the venous return to the heart because carotid distension was followed by a proportional rise in right atrial pressure. Consequently infusion of small volumes of saline into the right atrium also promoted tachycardia and hypertension. These responses seem not to depend on central nervous mechanisms because they persisted after complete deafferentation or removal of the bulbomesencephalic centers. 1979 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03636135_v6_n6_pH639_Segura http://hdl.handle.net/20.500.12110/paper_03636135_v6_n6_pH639_Segura |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
animal experiment blood pressure cardiovascular system carotid artery pressure carotid sinus pressoreceptor heart heart rate tachycardia |
| spellingShingle |
animal experiment blood pressure cardiovascular system carotid artery pressure carotid sinus pressoreceptor heart heart rate tachycardia Pressure and heart rate responses to raised carotid pressure in the toad |
| topic_facet |
animal experiment blood pressure cardiovascular system carotid artery pressure carotid sinus pressoreceptor heart heart rate tachycardia |
| description |
Neither transient nor steady occlusion of the bilateral carotid arterial trunks had noticeable effects on blood pressure or heart rate of the toad Bufo arenarum Hensel. Distension of isolated carotid labyrints had no circulatory effects, whereas distension of unisolated carotid trunks by fluid infusion caused an increase in blood pressure proportional to the applied pressure. A simultaneous tachycardia was recorded. These circulatory effects seem to depend on the venous return to the heart because carotid distension was followed by a proportional rise in right atrial pressure. Consequently infusion of small volumes of saline into the right atrium also promoted tachycardia and hypertension. These responses seem not to depend on central nervous mechanisms because they persisted after complete deafferentation or removal of the bulbomesencephalic centers. |
| title |
Pressure and heart rate responses to raised carotid pressure in the toad |
| title_short |
Pressure and heart rate responses to raised carotid pressure in the toad |
| title_full |
Pressure and heart rate responses to raised carotid pressure in the toad |
| title_fullStr |
Pressure and heart rate responses to raised carotid pressure in the toad |
| title_full_unstemmed |
Pressure and heart rate responses to raised carotid pressure in the toad |
| title_sort |
pressure and heart rate responses to raised carotid pressure in the toad |
| publishDate |
1979 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03636135_v6_n6_pH639_Segura http://hdl.handle.net/20.500.12110/paper_03636135_v6_n6_pH639_Segura |
| _version_ |
1768542505910927360 |