Cardiac Performance, Dr. D. Penney


Factors Affecting Heart Rate:

Leading to an INCREASE:

decreased activity of baroreceptors in the arteries, LV, and pulm. circ. (1)
inspiration (2)
excitement, anger, most painful stimuli (1)
hypoxia (1?)
exercise (1)
norepinephrine (1) , epinephrine
thyroid hormones
fever
Bainbridge reflex

Leading to a DECREASE:

increased activity of baroreceptors in the arteries, LV, and pulm. circ. (2)
expiration (1)
fear, grief (2)
stimulation of pain fibers in trigeminal nerve
increased intracranial pressure (Cushing Reflex) (1)


Last changed 03/16/01


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