CHRONIC EXPERIMENTS STUDYING THE ROLE OF SYMPATHETIC TONE IN REGULATING HEART ACTIVITY
Experimental data that have appeared lately are the evidence of the fact that sympathetic nerve exerts constant (tonic) stimulating influence on heart activity, what contradicts to formed (classical) conception on regulation of heart activity by a sympathetic nerve. However experimental data us have...
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| Format: | Article |
| Language: | Russian |
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«FIRMA «SILICEA» LLC
2001-04-01
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| Series: | Российский кардиологический журнал |
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| Online Access: | https://russjcardiol.elpub.ru/jour/article/view/2188 |
| Summary: | Experimental data that have appeared lately are the evidence of the fact that sympathetic nerve exerts constant (tonic) stimulating influence on heart activity, what contradicts to formed (classical) conception on regulation of heart activity by a sympathetic nerve. However experimental data us have worked under conditions of chronical experiment with blocade of sympathetic and parasympathetic nerve system by pharmaceutical medications, on the contrary, confirm classical ideas of the abscence of sympathetic nerve’s tonic influence on heart. According to our data, decrease of frequency of heart contractions in other specialists’ experiments is a result of effects of experiment’s conditions (narcosis’ kind and depth, possible hypothermia, experiment’s duration, sort of pharmaceutical medications). Frequency of heart contractions, as distinct hau the of blood vessels, is assessed in rest by a level of expression of wandering n.vagus tone and humoral substances circulating in blood. Classical concepts of abscence of tone of sympathetic nerves for heart remain in effect. |
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| ISSN: | 1560-4071 2618-7620 |