HRV

Heart rate variability (HRV) is a measure of the variation in time between each heartbeat and serves as an important biomarker for assessing autonomic nervous system function, stress levels, and overall health. Several studies have highlighted HRV's role across various conditions. For instance, research indicates that lower HRV is often associated with increased psychological stress and anxiety, while higher HRV is linked to better emotional regulation and resilience. In cardiovascular contexts, factors such as age, physical activity, and certain diseases can significantly impact HRV, with lower values often indicating poorer heart health. Traumatic brain injury (TBI) has also been shown to affect HRV, suggesting its potential as a marker for neurological recovery. Additionally, biofeedback techniques aimed at improving HRV have demonstrated promising results in enhancing cardiovascular and autonomic regulation. Despite these findings, the evidence base is still evolving, and more research is needed to fully understand the complex interactions between HRV and various health outcomes.

Sources

• Heart Rate Variability in Psychology: A Review of HRV Indices and an Analysis Tutorial. (PMID:34207927)
• Analysis of Heart Rate Variability and Implication of Different Factors on Heart Rate Variability. (PMID:33390146)
• Heart rate variability (HRV) after traumatic brain injury (TBI): a scoping review. (PMID:38590161)
• Harnessing non‑invasive vagal neuromodulation: HRV biofeedback and SSP for cardiovascular and autonomic regulation (Review). (PMID:40386190)
• Neuromodulation Applied to Diseases: The Case of HRV Biofeedback. (PMID:36233794)
• Heart Rate Variability (HRV) in Patients with Sleep Apnea and COPD: A Comprehensive Analysis. (PMID:40649003)

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