Abstract:
:Particulate matter air pollution has been related to an increase in cardiopulmonary morbidity and mortality especially in susceptible subjects with a known cardiopulmonary disease. Recent studies suggest that PM(2.5) air pollution was associated with changes in heart rate variability (HRV). The purpose of this study was to identify and compare changes in HRV in positive or negative head-up tilt (HUT) participants. Fifty two subjects, 31 women and 21 men, 20-40 years old, underwent PM(2.5) personal monitoring and Holter-ECG monitoring in supine and orthostatic position, during active standing, in indoor and outdoor environments. All measurements were made between 8 and 11 AM in the same geographical location (southeast of Mexico City). Frequency domain indexes were estimated in absolute (ms(2)) and in normalized units (nu) (low frequencies (LF), high frequencies (HF) and low/high frequency ratio (LF/HF)) in 5 min periods by standard methods. Data were transformed into natural logarithmic scale (ln). Comparisons were made between genders and positive and negative HUT subjects. LF were larger and HF were smaller in negative HUT males. Multivariate analysis with GEE models, adjusted for each index, showed a significant decrease of HRV (LFln -0.194 95% CI, -0.4509, 0.0627, and HFln -0.298 95% CI, -0.5553, -0.0401) associated to an increase in PM(2.5) air pollution in positive and negative HUT subjects which was larger for HFln in outdoor environments. PM(2.5) air pollution was associated with changes in HRV in positive and negative HUT subjects without cardiopulmonary disease.
journal_name
Environ Resjournal_title
Environmental researchauthors
Cárdenas M,Vallejo M,Romano-Riquer P,Ruiz-Velasco S,Ferreira-Vidal AD,Hermosillo AGdoi
10.1016/j.envres.2008.04.005subject
Has Abstractpub_date
2008-09-01 00:00:00pages
1-6issue
1eissn
0013-9351issn
1096-0953pii
S0013-9351(08)00088-1journal_volume
108pub_type
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