Studies designed to evaluate the functional reserve of a system are called provocative, tolerance, or stress tests. They differ from simple measurements in that they have two variables, challenge and response, both of which must be defined, one fixed, and the other validated by correlation with a criterion accepted as a measure of the reserve in question—in this case, delivery of blood, really oxygen, to the myocardium.
KeywordsObesity Depression Doxorubicin Cardiomyopathy Catecholamine
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