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Left ventricular function during haemofiltration and haemodialysis: a comparative study.

P Aljama, A Martin-Malo, R Sanz

    Proceedings of the European Dialysis and Transplant Association. European Dialysis and Transplant Association
    |January 1, 1983
    PubMed
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    Hemodialysis (HD) buffer composition impacts cardiac function. Bicarbonate improves myocardial contractility, while acetate decreases vascular resistance during fluid removal in patients undergoing hemodialysis.

    Area of Science:

    • Cardiology
    • Nephrology
    • Physiology

    Background:

    • Systemic hemodynamics and left ventricular performance are critical during hemodialysis (HD).
    • Understanding the impact of different solute transport mechanisms and buffer compositions on cardiac function during HD is essential for patient management.

    Purpose of the Study:

    • To evaluate the relationship between systemic hemodynamics and left ventricular performance during fluid removal in hemodialysis.
    • To investigate the specific effects of convective versus diffusive solute transport and different dialysate buffers (acetate and bicarbonate) on cardiac function.

    Main Methods:

    • M-mode echocardiography was used to assess left ventricular performance.
    • Patients with normal cardiac function undergoing hemodialysis with similar fluid removal rates were studied.

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  • The effects of convective transport and diffusive transport with acetate and bicarbonate buffers were analyzed.

    • Main Results:

    • Convective transport increased systemic vascular resistance without altering ventricular function, irrespective of the replacement buffer.
    • Diffusive transport with acetate decreased vascular resistance.
    • Diffusive transport with bicarbonate significantly improved myocardial contractility, shifting the cardiac function curve leftward.

    Conclusions:

    • Dialysate buffer composition significantly influences cardiac performance during hemodialysis.
    • Bicarbonate buffer demonstrates a beneficial effect on myocardial contractility, while acetate impacts vascular resistance.
    • These findings highlight the importance of buffer selection in optimizing hemodynamic management during HD.