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Selective right ventricular dysfunction after coronary artery bypass grafting.

M A Rabinovitch, J Elstein, R C Chiu

    The Journal of Thoracic and Cardiovascular Surgery
    |September 1, 1983
    PubMed
    Summary

    Coronary bypass surgery can depress right ventricular ejection fraction (RVEF) in some patients, particularly those with right coronary artery issues. This specific RVEF decline did not correlate with left ventricular ejection fraction (LVEF) changes or elevated myocardial injury markers.

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    Area of Science:

    • Cardiology
    • Cardiac Surgery
    • Nuclear Cardiology

    Background:

    • Coronary artery bypass grafting (CABG) is a common cardiac surgical procedure.
    • Assessing ventricular function, specifically right ventricular ejection fraction (RVEF) and left ventricular ejection fraction (LVEF), is crucial for patient outcomes.
    • The impact of CABG on isolated RVEF depression is not well-defined.

    Purpose of the Study:

    • To investigate changes in RVEF and LVEF following coronary bypass operations.
    • To identify patient subgroups experiencing postoperative RVEF depression.
    • To explore the relationship between RVEF depression, LVEF, and myocardial injury markers.

    Main Methods:

    • Radionuclide techniques were employed to measure RVEF and LVEF.
    • 15 patients undergoing coronary bypass surgery were studied.

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  • Myocardial injury index was calculated using creatine kinase isoenzyme (CK-MB) curves.

    • Main Results:

    • Three patients with right coronary artery lesions exhibited postoperative RVEF depression.
    • This RVEF depression occurred without a concurrent decrease in LVEF.
    • Patients with isolated RVEF depression showed no significant elevation in the myocardial injury index.

    Conclusions:

    • Postoperative RVEF depression can occur selectively after coronary bypass surgery, particularly in patients with right coronary artery disease.
    • Selective RVEF depression may not be associated with significant myocardial injury.
    • Further research is needed to understand the clinical implications of isolated RVEF depression post-CABG.