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Study finds stoke risk increased even when air pollution remained in moderate levels in Boston

A Beth Israel Deaconess Medical Center research team has found that air pollution levels considered safe by the U.S. Environmental Protect Agency (EPA) may substantially increase the risk of stroke.

"This is a significant study because we have documentation that the risk of stroke can be elevated when the air quality is still within the guidelines set by the current EPA regulations," Dr. Murray A. Mittleman, an author of the study who teaches at Harvard Medical School and works in the CardioVascular Institute at Beth Israel Deaconess, told "This implies that the current regulations can be strengthened further to prevent these catastrophic health events."

Homeowners should consider investing in a medical-grade home air purifier to decrease his or her risk of exposure to air pollution that can lead to medical conditions. Researchers reviewed the medical records of 1,700 stroke patients in the Boston area over the course of 10 years. They found a 34 percent increase in the risk of ischemic stroke on days with moderate air quality in comparison to those rated good by the EPA.

A study such as this further increases the tie between poor air quality and a negative health impact.