Air Pollution and Repolarization Heterogeneity

Altered Cardiac Repolarization in Association with Air Pollution and Air Temperature among Myocardial Infarction Survivors

BACKGROUND Epidemiological studies have shown that ambient particulate matter (PM) and changes in air temperature are associated with increased cardiopulmonary events. OBJECTIVE We hypothesized that patients with previous myocardial infarction (MI) experience changes in heart rate (HR) and repolarization parameters, such as Bazett-corrected QT interval (QTc), and T-wave amplitude (Tamp), in a...

Acute Adverse Effects of Fine Particulate Air Pollution on Ventricular Repolarization

BACKGROUND The mechanisms for the relationship between particulate pollution and cardiac disease are not fully understood. OBJECTIVE We examined the effects and time course of exposure to fine particulate matter < or = 2.5 microm in aerodynamic diameter (PM(2.5)) on ventricular repolarization of 106 nonsmoking adults who were living in communities in central Pennsylvania. METHODS The 24-hr ...

Repolarization Changes Induced by Air Pollution in Ischemic Heart Disease Patients

Epidemiologic studies report associations between particulate air pollution and cardiovascular morbidity and mortality, but the underlying pathophysiologic mechanisms are still unclear. We tested the hypothesis that patients with preexisting coronary heart disease experience changes in the repolarization parameters in association with rising concentrations of air pollution. A prospective panel ...

Air Pollution and Health

Air pollution and health.

OBJECTIVE To review the effects of air pollution on health, with special reference to data obtained locally in Hong Kong. DATA SOURCES Medline literature search (1960-1999), websites of the World Health Organization and Environmental Protection Department, Hong Kong, and a report from the Sub-Working Group on the Review of Hong Kong's Air Quality Objectives, 1999. STUDY SELECTION Key words ...