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Related Experiment Videos

Left ventricular function after a single large dose of verapamil.

J Ortiz, A Matsumoto, C A Monaco

    The American Journal of Cardiology
    |February 26, 1986
    PubMed
    Summary

    A single 240 mg oral dose of verapamil effectively lowered blood pressure in hypertensive patients. This treatment also reduced left ventricular (LV) performance indexes, indicating its impact on cardiac function.

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    Area of Science:

    • Cardiology
    • Pharmacology

    Background:

    • Hypertension is a significant risk factor for cardiovascular disease.
    • Left ventricular (LV) function is crucial in managing hypertensive patients.
    • Verapamil is a calcium channel blocker used to treat hypertension.

    Purpose of the Study:

    • To evaluate the effects of a single oral dose of verapamil on left ventricular (LV) function in chronically hypertensive patients.
    • To assess the impact of verapamil on arterial blood pressure and cardiac performance indexes.

    Main Methods:

    • Noninvasive assessment of LV function using echocardiography and phonomechanocardiography.
    • Administration of a single oral dose of 240 mg verapamil to 18 chronically hypertensive patients.
    • Measurement of arterial blood pressure before and after verapamil administration.

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    Main Results:

    • Significant decrease in systolic and diastolic blood pressure (p < 0.01).
    • Significant reductions in LV ejection time, LV diastolic diameter, ejection fraction, stroke volume, and cardiac output (p < 0.01).
    • Significant increases in preejection period and end-systolic volume (p < 0.01).

    Conclusions:

    • A single 240 mg oral dose of verapamil is highly effective in lowering arterial blood pressure in hypertensive patients.
    • Verapamil reduces peripheral resistance and impacts LV performance indexes.
    • Verapamil demonstrates significant effects on cardiac function in hypertensive individuals.