Intense light reduces heart attack risks

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Intense light reduces heart attack risks

Intense white light may be the latest way to prevent heart attacks besides other ways like cardiopulmonary resuscitation (CPR), aspirin and clot-busters, according to a study.


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Published: Fri 27 Apr 2012, 11:24 AM

Last updated: Fri 3 Apr 2015, 9:09 AM

“The study suggests that strong light, or even just daylight, might ease the risk of having a heart attack or suffering damage from one,” says Tobias Eckle, associate professor of anesthesiology, cardiology, and cell and developmental biology at the University of Colorado School of Medicine.

“For patients, this could mean that daylight exposure inside the hospital could reduce the damage that is caused by a heart attack,” adds Eckle.

What’s the connection between light and a myocardial infarction, commonly known as a heart attack? The answer lies, perhaps surprisingly, in the circadian rhythm, the body’s clock that is linked to light and dark.

The circadian clock is regulated by proteins in the brain. But the proteins are in other organs as well, including the heart, according to a Colorado statement.

Eckle and Holger Eltzschig, Colorado professor of anesthesiology, found that one of those proteins, called Period 2, plays a crucial role in fending off damage from a heart attack.

During a heart attack, little or no oxygen reaches the heart. Without oxygen, the heart has to switch from its usual fuel - fat - to glucose. Without that change in heart metabolism, cells die and the heart is damaged And here’s where the circadian rhythm comes in.

The study showed that the Period 2 protein is vital for that change in fuel, from fat to glucose, and therefore could make heart metabolism more efficient. In fact, Strong daylight activated Period 2 in animals and minimized damage from a heart attack.

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