The Efficacy of Remote Ischemic Preconditioning on Cardiovascular Autonomic Function and Sympathovagal Balance in Hypertensive Patients
- May 16
- 2 min read
Updated: May 22
DOI: https://doi.org/10.66715/jsccr/2026v3.i3.1528 | Original Research | 2026 | Volume 3 | Issue 3 | Page 15-28
Dr. Shahan Layek, Independent Researcher, West Bengal, India, Email: layekcallmeshahan@gmail.com
Abstract
Background: Hypertension is strongly associated with cardiovascular autonomic dysfunction, characterized by sympathetic overactivity and diminished vagal tone. This sympathovagal imbalance elevates the risk of adverse cardiovascular events. Remote ischemic preconditioning (RIPC)—brief, repeated cycles of non-lethal ischemia and reperfusion applied to a limb—has emerged as a promising non-pharmacological intervention to modulate autonomic activity, though its specific efficacy in hypertensive populations requires further elucidation.
Objective: To evaluate the efficacy of remote ischemic preconditioning on cardiovascular autonomic function and sympathovagal balance in patients with essential hypertension.
Methods: This randomized, controlled trial enrolled adult patients with established primary hypertension. Participants were randomly assigned to either the RIPC group or a sham-control group. The RIPC protocol consisted of four cycles of 5-minute ischemia (induced by inflating a blood pressure cuff on the upper arm to 200 mmHg or 30 mmHg above systolic pressure) followed by 5-minute reperfusion. The sham protocol used low-pressure cuff inflation. Cardiovascular autonomic function was assessed pre- and post-intervention using heart rate variability (HRV) analysis, baroreflex sensitivity (BRS), and continuous blood pressure monitoring. Sympathovagal balance was primary quantified via the ratio of low-frequency to high-frequency power (LF/HF ratio) from HRV.
Results: Compared to the sham control, patients receiving RIPC demonstrated significant improvements in autonomic profiles. RIPC significantly increased markers of vagal activity, including high-frequency (HF) power and the root mean square of successive differences (RMSSD). Concurrently, a marked reduction in low-frequency (LF) power and a decreased LF/HF ratio were observed, indicating a favorable shift in sympathovagal balance away from sympathetic dominance. Furthermore, RIPC significantly enhanced baroreflex sensitivity and was accompanied by an acute, modest reduction in resting systolic and diastolic blood pressure.
Conclusion: Remote ischemic preconditioning effectively improves cardiovascular autonomic function and restores a more favorable sympathovagal balance in hypertensive patients. By mitigating sympathetic overactivity and enhancing vagal tone, RIPC represents a viable, non-invasive adjuvant therapeutic strategy to reduce cardiovascular risk in this population.