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Nonlinear Closed-Loop Predictive Control of Heart Rate and Blood Pressure Using Vagus Nerve Stimulation: An In Silico

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    This study introduces a novel control method using vagus nerve stimulation to regulate heart rate and blood pressure. The technique shows robustness in simulations for cardiovascular control.

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    Area of Science:

    • Biomedical Engineering
    • Computational Physiology
    • Control Systems

    Background:

    • Cardiovascular regulation involves complex physiological feedback mechanisms.
    • Vagus nerve stimulation is a potential therapeutic target for cardiovascular control.
    • Existing models often lack the complexity to capture dynamic hemodynamic responses.

    Purpose of the Study:

    • To develop and validate a nonlinear model-based control technique for heart rate and blood pressure regulation.
    • To investigate the efficacy of vagus nerve neuromodulation for cardiovascular control.
    • To simulate hemodynamic responses using an in silico rat cardiovascular model.

    Main Methods:

    • Development of a closed-loop control framework utilizing an in silico rat cardiovascular model.
    • Compartmentalization of physiological components and incorporation of baroreflex regulation.
    • Application of a nonlinear model predictive control algorithm with a reduced cycle-averaged model.
    • Simulation of nominal and hypertension-related heart dynamics in rest and exercise states.

    Main Results:

    • The proposed control strategy effectively regulates heart rate and blood pressure.
    • The system demonstrated robustness in setpoint tracking and disturbance rejection.
    • Multi-location vagal nerve stimulation parameters were optimized using the control algorithm.

    Conclusions:

    • Nonlinear model-based control offers a promising approach for vagus nerve neuromodulation in cardiovascular regulation.
    • The in silico model provides a valuable platform for testing and refining control strategies.
    • This technique shows potential for managing cardiovascular conditions through precise neuromodulation.