30 Photos That Can Raise Your Pulse in a blink

You have a heart arrhythmia.

A heart arrhythmia happens when there’s some sort of electrical malfunction in your heart, which can cause it to beat irregularly. There are many forms, and they have different causes, but they can often make it feel like your heart is beating quickly or strangely out of nowhere. Although an arrhythmia sounds like a dire diagnosis from Grey’s Anatomy, they actually aren’t always serious. “Many arrhythmias are not life-threatening,” Dr. Mills-Frazier says. “