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Related Experiment Videos

Calcium channel blockade: central hemodynamic effects.

L G Ekelund

    Acta Pharmacologica Et Toxicologica
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Calcium channel blockers like verapamil, nifedipine, and diltiazem show varied in vitro effects but yield similar central hemodynamic outcomes in humans at equipotent doses. This review discusses their distinct hemodynamic profiles.

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    Area of Science:

    • Pharmacology
    • Cardiovascular Physiology

    Background:

    • Verapamil, nifedipine, and diltiazem are calcium channel blockers with distinct in vitro vasodilatory, inotropic, and chronotropic properties.
    • Understanding their in vivo hemodynamic effects is crucial for clinical application.

    Purpose of the Study:

    • To compare the central hemodynamic effects of verapamil, nifedipine, and diltiazem in humans.
    • To review and discuss the individual hemodynamic action profiles of these calcium channel blockers.

    Main Methods:

    • Review of existing literature on the in vitro and in vivo effects of verapamil, nifedipine, and diltiazem.
    • Analysis of central hemodynamic parameters in healthy individuals receiving equipotent doses.

    Main Results:

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  • Despite in vitro differences, equipotent doses of these drugs produce similar central hemodynamic effects in healthy young or middle-aged individuals.
  • Individual drug profiles exhibit variations in vasodilatation, inotropy, and chronotropy.

    • Conclusions:

    • Clinical administration of equipotent doses of verapamil, nifedipine, and diltiazem results in comparable central hemodynamic effects.
    • The distinct in vitro profiles do not translate to significantly different in vivo hemodynamic outcomes in this population.