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Energy Drinks Linked to Changes in Heart Rhythm
Date:3/22/2013

By Randy Dotinga
HealthDay Reporter

THURSDAY, March 21 (HealthDay News) -- Energy drinks boost blood pressure and may make the heart more susceptible to electrical short circuits, new research suggests.

But it's not clear how much of this effect on blood pressure has to do with caffeine, which also is found in coffee, or whether the effect significantly raises the risk of heart problems.

So should you put down your Red Bull or Monster Energy Drink? Not necessarily, experts say.

"I have no real concern that having an energy drink or two will negatively impact most people's health," said Dr. C. Michael White, a professor and head of pharmacy practice at the University of Connecticut. He has studied energy drinks and is familiar with the new review's findings.

However, he said, "there is enough information in this meta-analysis to make me concerned that there may be pockets of the population who may have an increased risk of adverse events, and more work needs to be done to see if this is true."

In other words, it's possible that some people could be especially vulnerable to the effects of energy drinks.

At issue are the caffeine-laden drinks that have become popular among people looking to stay alert, stay awake or get a jolt. Sixteen-ounce cans of drinks like Monster Energy Assault and Rockstar pack in about 160 milligrams of caffeine, compared with roughly 100 milligrams in a 6-ounce cup of coffee.

Energy drinks also come with other ingredients like sugar and herbs, and medical experts have warned that they can spell trouble.

Industry representatives defend energy drinks, saying they contain about as much caffeine by the ounce as coffeehouse drinks. But people often consume much more of the energy drinks at one time.

In the new report, researchers looked at seven studies. Among them, a total of 93 participants drank energy drinks and had their "QT interval" measured, while a
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