Cardiopulmonary Coupling Spectrogram as an Ambulatory Method for Assessing Sleep Disorders in Patients With...

Area of Science:

• Neurology
• Sleep Medicine
• Cardiology

Background:

• Sleep disorders are prevalent and clinically significant in autoimmune encephalitis (AE) but remain poorly understood.
• Cardiopulmonary coupling (CPC), an electrocardiogram-based portable sleep monitoring technology, has not been extensively evaluated for sleep disorder assessment in AE.

Purpose of the Study:

• To evaluate the utility of cardiopulmonary coupling (CPC) in assessing sleep disorders in patients with autoimmune encephalitis (AE).
• To compare sleep parameters between AE patients and healthy controls using CPC monitoring.

Main Methods:

• Sixty patients diagnosed with AE were age- and sex-matched with 66 healthy control subjects.
• All participants underwent CPC testing, and data on demographics, clinical information, and Pittsburgh Sleep Quality Index (PSQI) scores were collected.
• Statistical analysis was performed using R language programming software.

Main Results:

• AE patients exhibited significantly higher PSQI scores, lower sleep efficiency (SE), reduced high-frequency coupling, increased REM sleep, and higher wakefulness percentages compared to controls.
• CPC-derived metrics revealed a higher low-frequency to high-frequency (LF/HF) ratio and a greater respiratory disturbance index in AE patients.
• Follow-up in 14 AE patients indicated improvements in PSQI scores and SE, with decreased wakefulness, suggesting potential for recovery during remission.

Conclusions:

• Sleep disorders, often accompanied by autonomic dysfunction, are common in patients with AE.
• Improvements in PSQI scores and SE appear to precede the full restoration of sleep microstructural disruption during remission.
• CPC parameters show potential as valuable tools for predicting and monitoring sleep disorders in AE patients.