Early-warning Intervention for Heat and Cold in Older Hypertensive Patients: Impact on Blood Pressure and ECG

Whenever a health risk warning for a heat waves or cold spells is issued, only the elderly in the combined intervention group will be alerted to the early warning information through the digital heat or cold health risk early warning tool.

A WeChat mini-program provides real-time updates on early warnings and health advisories.

Devices for self-monitoring blood pressure and ECG

Participants in the self-monitoring alone group were instructed to self-measure their BP three times each morning (from 6:00 a.m. to 8:00 a.m.) and evening (from 6:00 p.m. to 8:00 p.m.) at home, and to self-administer ECG measurements twice during the same morning and evening timeframes.