Relationship between ambient fine particles and ventricular repolarization changes and heart rate variability of elderly people with heart disease in Beijing, China.

摘要: Abstract Objective To explore the effects of particulate matters less than 2.5 μm in aerodynamic diameter (PM ) on heart repolarization/depolarization and rate variability (HRV). Methods We conducted a panel study for elderly subjects with disease Beijing from 2007 to 2008. PM was measured at fixed station 20 h continuously each day while electrocardiogram (ECG) indexes 42 were also recorded repeatedly. Meteorological data obtained China Data Sharing Service System. A mixed linear regression model used estimate associations between ECG indexes. The adjusted age, body mass index, sex, week meteorology. Results Significant adverse reflecting HRV observed statistically strongest effect lag 1 our study. However, there no repolarization/depolarization. Additionally, hypertension larger without hypertension. Conclusion This showed ambient could affect cardiac autonomic function people disease, appeared be more susceptive dysfunction induced by .