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Related Experiment Videos

[Effect of several catecholamines on pulmonary circulation].

V A Tsybenko, M A Navakatikian

    Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova
    |May 1, 1977
    PubMed
    Summary

    Adrenaline, noradrenaline, and isadrine affect blood pressure and pulmonary blood flow differently in dogs. Alpha-blockers inhibit adrenaline and noradrenaline, while beta-blockers affect isadrine

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    [Types of circulation in people with varying physical training].

    Fiziologicheskii zhurnal·1991

    Area of Science:

    • Cardiovascular Pharmacology
    • Adrenergic Receptor Function
    • Pulmonary Circulation Physiology

    Context:

    • Investigating the distinct effects of adrenergic agonists on canine cardiovascular parameters.
    • Utilizing isolated perfused lung lobes to isolate pulmonary vascular responses.
    • Examining the role of alpha- and beta-adrenergic receptors in mediating these effects.

    Purpose:

    • To differentiate the pressor and pulmonary vascular effects of adrenaline, noradrenaline, and isadrine.
    • To elucidate the receptor mechanisms underlying the pulmonary vascular actions of these catecholamines.
    • To determine the net effect of isadrine on pulmonary circulation and systemic blood pressure.

    Summary:

    • Intravenous injections of adrenaline, noradrenaline, and isadrine increased right ventricular blood pressure in anesthetized dogs.
    • Adrenaline and noradrenaline constricted pulmonary vessels by activating alpha-adrenoreceptors, as evidenced by blockade with phentolamine.
    • Isadrine exhibited variable effects, causing vasoconstriction or vasodilation in the lung lobe, with its effects blocked by the beta-blocker inderal, suggesting a complex role in pulmonary circulation.

    Impact:

    • Provides a detailed understanding of the differential actions of key adrenergic agonists on the pulmonary vasculature.
    • Highlights the specific receptor subtypes involved in mediating pulmonary vascular tone.
    • Suggests that isadrine's net effect on pulmonary circulation and systemic blood pressure can vary, influencing its therapeutic potential.

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