Enhanced external counterpulsation modulates the heartbeat evoked potential

Area of Science:

• Neuroscience
• Cardiology
• Biomedical Engineering

Background:

• Enhanced external counterpulsation (EECP) is known to affect cardiac function, hemodynamics, and cerebral blood flow.
• The precise mechanisms by which EECP induces these changes, particularly concerning brain-heart interactions, remain unclear.

Purpose of the Study:

• To investigate the impact of EECP on brain-heart coupling in healthy adults.
• To assess whether EECP alters heartbeat evoked potentials (HEP), a measure of brain-heart interaction.

Main Methods:

• A randomized sham-controlled design was employed with 40 healthy adults.
• Simultaneous electroencephalography (EEG) and electrocardiography (ECG) signals, blood pressure, and flow data were recorded before, during, and after EECP.
• Heartbeat evoked potential (HEP) amplitude, heart rate variability, EEG power, and hemodynamic parameters were analyzed and compared between active EECP and sham control groups.

Main Results:

• EECP intervention led to immediate fluctuations in HEP, specifically increasing HEP amplitudes in frontal lobe regions within distinct time windows post-T-peak.
• These modifications in HEP amplitude were not correlated with concurrent changes in measured physiological or hemodynamic variables.
• No significant changes were observed in the sham control group.

Conclusions:

• The study demonstrates that EECP stimuli modulate HEP in healthy individuals.
• Increased HEP following EECP may indicate enhanced brain-heart coupling.
• HEP shows potential as a biomarker for evaluating the effects and responsiveness to EECP treatment.