Cardiac Performance, Dr. D. Penney

Footnotes and qualifiers to heart rate changes:

(1) also produces a rise in B.P

(2) also produces a fall in B.P.

Note: norepinephrine has a direct chronotropic effect on the heart, but in the intact animal its pressor action stimulates
the baroreceptors, leading to reflex increase in vagal tone, producing bradycardia.

Last changed 03/11/98

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