| rate responsive p. |
an artificial cardiac pacemaker that can deliver stimuli at a rate adjustable to some parameter independent of atrial activity, such as respiratory rate, physical activity level, blood temperature, or mixed venous oxygen saturation level.
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| rate constant |
The speed of a chemical reaction. It varies with temperature.
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| rate of perceived exertion |
ABBR: RPE. A category and category-ratio scale developed by physiologist G. A. Borg, in which a patient reports his or her level of effort during exercise. The corresponding written descriptions range from “very light
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| rate-determining step |
The chemical reaction in a series of sequential reactions that takes the longest to occur.
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| rate-responsive pacemaker |
An electronic pacemaker that senses changes in the body's need for adjustment of the cardiac rate as can occur in sleeping, waking, sitting, walking, or running. The device alters cardiac rate by sensing body motion, ch
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