Drinking That Is Risking Five More From Heart Attack

Having busy work and family life, Mark Horsman relied on a combination of eight cups of coffee and three Red Bull cans on a daily basis, to keep him awake.

For three years, Brighton's construction manager was not disturbed. But one day, after consuming two cans of root energy, there was a terrible blow that came from his heart.

Mark, 52, thought he was dying. It was absolutely terrible,” he says. My heart was beating too fast”

Mark is thought to be one of many whose genetics makes them more sensitive to the effects of caffeine.

And he's far from alone. Experts are now warning that energetic caffeine drinks can fuel a record increase in diagnosis of irregular heart rate, news broadcasts.

Only one daily energy drink can cause arrhythmia, an irregular heart rate that increases the risk of beating fivefold.