Efficacy of Remote Ischemic Conditioning for Hypertension in High-Altitude Immigrant Populations

Inclusion Criteria: Age 18-60 years, of either sex; Continuous residence in a high-altitude region (\>2500 m) for more than 6 months, with no plan for long-term departure from the plateau during the study period; Meeting the diagnostic criteria for essential hypertension; Willing to provide written informed consent. Exclusion Criteria: Evidence of secondary hypertension; Severe dysfunction of vital organs (e.g., heart, liver, kidney, lungs); Active malignancy, uncontrolled hyperthyroidism, active autoimmune disease, or poorly controlled diabetes mellitus; Office blood pressure ≥180/110 mmHg, or 24-hour average blood pressure ≥170/100 mmHg; Hospitalization for hypertensive crisis or emergency at least once within the past 3 months; History of cardiovascular or cerebrovascular event within the past 3 months; Pregnancy, planned pregnancy, or lactation for female participants; Contraindications to RIC (e.g., severe peripheral arterial disease, venous thrombosis, or soft tissue injury in the upper limbs); Any other condition deemed by the investigator to be unsuitable for participation in the study.