Key result
In anesthetized cats, serotonin increased myocardial perfusion and dilated arterioles <90 microns while constricting larger vessels, whereas vasopressin decreased myocardial perfusion.
Why the study?
Does serotonin or vasopressin infusion cause nonuniform vasomotor responses in the coronary microcirculation of anesthetized cats?
Does serotonin or vasopressin infusion cause nonuniform vasomotor responses in the coronary microcirculation of anesthetized cats?
Serotonin produces nonuniform vasomotor responses in the coronary microcirculation, constricting larger arterioles while dilating smaller ones, whereas vasopressin decreases overall myocardial perfusion.
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Serotonin-induced nonuniform coronary responses in cats warrant clinical caution; leaves open human microvascular heterogeneity studies.
Lamping et al. (1989) studied Coronary microcirculation vasomotor responses (n=36). Serotonin and vasopressin vs. Baseline (control) was evaluated on Myocardial blood flow and vessel diameter changes. In anesthetized cats, serotonin increased myocardial perfusion and dilated arterioles <90 microns while constricting larger vessels, whereas vasopressin decreased myocardial perfusion.
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