Key result
Dextran-induced anemia increases aortic chemoreceptor firing, but carotid firing rises only after sympathetic nerve section.
Why the study?
The differential responses of aortic and carotid chemoreceptors to anemia and the role of sympathetic nerve activity in these responses were not fully understood.
Does anemia alter aortic and carotid chemoreceptor nerve activity in anesthetized cats?
Does anemia alter aortic and carotid chemoreceptor nerve activity in anesthetized cats?
Anemia stimulates aortic chemoreceptors but not carotid chemoreceptors in cats, with the lack of carotid response mediated by sympathetic nerve activity.
No takes yet. Share an insight, caveat, or question.
Does not inform clinical anemia management; leaves open differential chemoreceptor roles in human anemia pathophysiology.
Hatcher et al. (1978) studied this question. Anemia (lowered hematocrit by dextran-for-blood exchange) vs. Control period was evaluated on Activities of aortic and carotid chemoreceptor nerves. Anemia induced by dextran-for-blood exchange caused a sustained nonlinear increase in aortic chemoreceptor firing, while carotid chemoreceptor firing increased only after sympathetic nerve section.
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