An Implanted Closed-loop Chip System for Heart Rate Control: System Design and Effects in Conscious Rats

Area of Science:

• Biomedical Engineering
• Neuroscience
• Cardiovascular Research

Background:

• Heart rate (HR) regulation is crucial for cardiovascular health.
• Current methods for HR control may have limitations.
• Developing precise, real-time HR management systems is an ongoing challenge.

Purpose of the Study:

• To assess the efficacy of a novel implanted chip system for controlling heart rate (HR).
• To investigate the system's ability to modulate HR through vagal nerve stimulation.

Main Methods:

• An implanted chip system was designed to regulate HR in conscious Sprague-Dawley rats.
• The system utilized real-time HR feedback to stimulate the right cervical vagus nerve.
• Electrocardiogram (ECG) was recorded for 24 hours, with 30-minute regulation and recovery periods.

Main Results:

• Successful ECG recording throughout the experiment.
• Significant reduction in HR during the regulation phase compared to control (-79.3 ±34.5, P < 0.01).
• HR returned to normal levels post-regulation.

Conclusions:

• The implanted chip system demonstrated effective regulation of heart rate to a specific set point.
• This technology shows potential for precise cardiovascular control applications.