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Related Experiment Videos

Vasodilator therapy for right ventricular failure.

K Sakaguchi, N Tanaka, M Sawada

    Japanese Circulation Journal
    |April 1, 1984
    PubMed
    Summary

    Prostaglandin E1 (PGE1) improved right ventricular failure in patients with pulmonary hypertension by reducing afterload. Isosorbide dinitrate (ISD) did not significantly alter pulmonary vascular resistance but reduced right ventricular workload during exercise.

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    Biochemistry·1992

    Area of Science:

    • Cardiology
    • Pulmonary Medicine
    • Pharmacology

    Background:

    • Pulmonary hypertension secondary to chronic lung disease significantly impacts right ventricular performance.
    • Right ventricular failure is a critical complication in patients with chronic respiratory conditions.

    Purpose of the Study:

    • To evaluate the effects of Prostaglandin E1 (PGE1) on right ventricular failure in patients with acute exacerbation of chronic respiratory failure.
    • To assess the impact of Isosorbide dinitrate (ISD) on right ventricular performance at rest and during exercise in patients with stable chronic respiratory failure.

    Main Methods:

    • Intravenous infusion of PGE1 (0.01-0.03 microgram/kg/min) in 12 patients.
    • Intravenous infusion of ISD (0.05 mg/kg/hr) in 11 patients.
    • Hemodynamic parameters including right atrial pressure (RAP), pulmonary artery mean pressure (PAMP), total pulmonary vascular resistance (TPVR), cardiac index (CI), stroke index (SI), and right ventricular work index (RVWI) were measured.

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    Main Results:

    • PGE1 significantly decreased RAP, PAMP, and TPVR, while increasing CI and SI, indicating improved right ventricular afterload and function.
    • PGE1 led to a decrease in PaO2 but maintained PvO2 due to increased oxygen transport.
    • ISD significantly decreased RAP, PAMP, and CI at rest and during exercise, and reduced RVWI during exercise, without altering TPVR.

    Conclusions:

    • PGE1 effectively improves right ventricular failure secondary to chronic lung disease by inducing pulmonary vasodilation and reducing afterload.
    • ISD demonstrates a reduction in right ventricular workload during exercise in patients with chronic respiratory failure, though its effect on pulmonary vascular resistance is limited.