Why the study?
Do alpha-adrenergic blocking agents alter heart rate, contractility, and norepinephrine release during exercise in conscious dogs?
Population
Conscious dogs
Comparison
Intravenous prazosin, phentolamine, and… vs Control exercise and exercise after prazosin
Design
Preclinical
Authors
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Alpha2 blockade potentiates sympathetic responses during exercise in dogs; leaves open relevance to human autonomic regulation.
Do alpha-adrenergic blocking agents alter heart rate, contractility, and norepinephrine release during exercise in conscious dogs?
In conscious dogs, prejunctional alpha 2-adrenoreceptors are stimulated during exercise, modulating norepinephrine release through a negative feedback inhibitory mechanism.
Heyndrickx et al. (1984) studied this question.
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