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Pulse rhythm

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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Heart rate variability biofeedback for critical illness polyneuropathy: a randomized sham-controlled study.

Annahita Sedghi¹, Christoph Bartels^1,2, Erik Simon¹

¹Dresden Neurovascular Center, Department of Neurology, Medical Faculty and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Dresden, Germany.

European Journal of Neurology

|October 19, 2024

Summary

Heart rate variability (HRV) biofeedback improved neurocardiac function in critical illness polyneuropathy (CIP) patients by enhancing parasympathetic activity. This intervention also led to better functional recovery and reduced disability in CIP survivors.

Keywords:

biofeedback heart rate variability neuropathy parasympathetic sepsis

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Area of Science:

Neuroscience
Cardiology
Rehabilitation Medicine

Background:

Critical illness polyneuropathy (CIP) is associated with autonomic nervous system dysregulation and neurocardiac dysfunction, increasing mortality risk.
Understanding and improving neurocardiac function is crucial for managing CIP patients.

Purpose of the Study:

To evaluate the efficacy of heart rate variability (HRV) biofeedback in improving neurocardiac function in patients with CIP.
To assess the impact of HRV biofeedback on autonomic nervous system balance and functional recovery.

Main Methods:

A randomized controlled trial allocated 30 CIP patients to HRV biofeedback or sham biofeedback for 14 days.
Neurocardiac function was assessed using standard deviation of normal-to-normal intervals (SDNN) and HRV frequency domains.
Functional recovery was measured by the Barthel index and sympathetic skin function tests.

Main Results:

HRV biofeedback significantly increased SDNN and high-frequency HRV, indicating enhanced parasympathetic activity, sustained at 4-week follow-up.
Patients receiving HRV biofeedback showed a significantly higher adjusted Barthel index, indicating improved functional recovery.
No significant differences were observed in low-frequency HRV or sympathetic skin function between groups.

Conclusions:

HRV biofeedback shows promise as a therapeutic intervention for CIP patients.
The intervention improves neurocardiac function, particularly parasympathetic modulation, and aids in functional recovery.
Further research is warranted to confirm these pilot findings and explore long-term effects.