Does pollution affect heart health?

“Air pollution from traffic hinders the heart's ability to conduct electrical signals”, BBC News reported. It said that in a study of 48 patients hospitalised for heart attack or similar conditions, exposure to small chemical particles produced by burning fossil fuels caused ‘worrying changes’ that were picked up by ECG monitoring. It continued that The American Heart Association already recommend that some heart patients avoid driving after leaving hospital because of the stress it creates.