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Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis
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Coupling analysis of heart rate variability and cortical arousal using a deep learning algorithm.

Jiayan Huo1, Stuart F Quan2,3, Janet Roveda1,4,5

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Summary
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Cortical arousals during sleep significantly impact heart rate and its variability, regardless of cause. These effects differ by gender and sleep stage, potentially linking arousal burden to mortality risks.

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Autonomic Neuroscience

Background:

  • Frequent cortical arousals are linked to cardiovascular issues in sleep-disordered breathing.
  • Heart rate variability (HRV) changes indicate autonomic nervous system dysfunction.
  • Limited research exists on the immediate link between cortical arousal and HRV in diverse populations.

Purpose of the Study:

  • To investigate the instantaneous association between cortical arousal and HRV.
  • To analyze these associations in an ethnically diverse cohort using ECG data.
  • To explore differences based on arousal etiology, gender, and sleep stage.

Main Methods:

  • Utilized 1,069 subjects' full-night ECG signals from the Multi-Ethnic Study of Atherosclerosis dataset.
  • Employed a deep learning tool for automated arousal event annotation from ECG.
  • Calculated time-domain HRV and mean heart rate around arousal events (pre-, intra-, post-).

Main Results:

  • Heart rate and HRV increased during arousal onsets, irrespective of arousal etiology.
  • HRV responses to arousal varied significantly between genders and across different sleep stages.
  • Females exhibited more intense HRV variations, suggesting a stronger arousal-mortality link.

Conclusions:

  • Cortical arousals acutely alter cardiac autonomic activity.
  • Gender and sleep stage modulate the cardiac response to arousals.
  • Findings offer insights into the association between sleep disturbances, autonomic dysfunction, and cardiovascular outcomes, including sudden cardiac death.