Influence of autonomic nervous system stimulation on the protective zone.
Cardiovasc Res
; 15(2): 92-7, 1981 Feb.
Article
en En
| MEDLINE
| ID: mdl-6167355
The effect of sympathetic and parasympathetic stimulation on the vulnerable period threshold and the protective zone was studied in chloralose-anaesthetised dogs. Sympathetic stimulation substantially decreased the repetitive extrasystole threshold and shifted the timing of the protective zone earlier into diastole. Vagus nerve excitation exerted the opposite effect on both electrophysiological properties. During concurrent sympathetic nerve stimulation, the changes produced by vagal activation were accentuated. These findings suggest that parasympathetic influences on the protective zone are due, in part, to an antagonism of adrenergic effects on ventricular electrical properties.
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Banco de datos:
MEDLINE
Asunto principal:
Sistema Nervioso Autónomo
/
Fibrilación Ventricular
Límite:
Animals
Idioma:
En
Revista:
Cardiovasc Res
Año:
1981
Tipo del documento:
Article