Study Links Sleep Heart Rate Variability to Stroke and Depression Risk

New research presented at the EAN Congress 2025 reveals that heart rate variability (HRV) during sleep may signal future risks of stroke, depression, and cognitive decline—even in those without sleep issues.

The University Hospital of Bern study tracked 4,170 people over 13,217 person-years. Findings show that abnormal HRV patterns at night—either too high, too low, or erratic—are linked to later development of neurological, cardiovascular, metabolic, and endocrine diseases.

HRV reflects how well the autonomic nervous system regulates vital functions like breathing and digestion. During sleep, HRV typically drops as the body enters recovery mode.

Researchers suggest HRV could serve as an early warning marker for disease, allowing for timely intervention. As wearable tech advances, HRV tracking may become a standard tool in preventive healthcare.

The study highlights sleep as a key factor in long-term health.

24-06-2025