Case report: Biphasic autonomic response in decompression sickness: HRV and sinoatrial findings. | Canada Hyperbarics Skip to main content
Case Study Frontiers in physiology 2025

Case report: Biphasic autonomic response in decompression sickness: HRV and sinoatrial findings.

Schmitz G — Frontiers in physiology, 2025

Tier 2, Indexed

Automatically imported from PubMed based on relevance criteria.

Summary

What Researchers Did

Researchers conducted a case study on a 35-year-old recreational diver who developed neurological decompression sickness and persistent bradycardia, assessing heart rate variability during hyperbaric oxygen therapy and continuous monitoring.

What They Found

During hyperbaric oxygen therapy, the patient initially showed pronounced parasympathetic activity, with an RMSSD of 243 m and HF power of 8,656 m. This was followed by a sympathetic tilt, indicated by an LF/HF ratio of 3.1, and desynchronization revealed by Principal Dynamic Mode analysis. This suggests a biphasic autonomic response in decompression sickness.

What This Means for Canadian Patients

Canadian divers experiencing decompression sickness, especially with neurological symptoms, may benefit from comprehensive cardiac monitoring. Advanced heart rate variability analysis could help detect subtle autonomic dysfunctions that traditional methods might miss, guiding post-dive assessment.

Canadian Relevance

This study has no direct Canadian connection.

Study Limitations

As a single case report, the findings are limited to one individual and may not be generalizable to a broader patient population.

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Study Details

Study Type Case Study
Category Neurological
Source Pubmed
PubMed ID 40365084
Year Published 2025
Journal Frontiers in physiology

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Disclaimer: This study summary is provided for informational and educational purposes only. It does not constitute medical advice. The information presented reflects the findings of the original research authors and may not represent the views of Canada Hyperbarics. Always consult a qualified healthcare professional before making treatment decisions.