Cardiac arrhythmia (irregular heartbeat)

An arrhythmia means the heart is beating too fast (tachycardia), too slow (bradycardia), or in an otherwise irregular way. Most arrhythmias don’t cause any problems, but some are serious, even life-threatening. If insufficient blood reaches the brain, heart, and/or other organs, significant damage can occur.

Energy drinks have been shown to increase the risk of cardiac arrhythmias. In the cases of 14-year-old Anais Fournier and 19-year-old Alex Morris, arrhythmias proved fatal.