UNC Health Caldwell - An irregular heartbeat is usually not something to worry about, but if it happens on a regular basis, and you have other symptoms as well, it could be
Missouri Baptist Medical Center - Atrial fibrillation, often called a-fib, is an irregular heartbeat or arrhythmia. Some people don't experience any signs of a-fib while others often mistake signs of a-fib for
![American Heart Association på Twitter: "AFib can feel like an irregular heartbeat, shortness of breath & lightheadedness or it can have no symptoms at all. https://t.co/zKINYCyLRu https://t.co/5HDLI5RohB" / Twitter American Heart Association på Twitter: "AFib can feel like an irregular heartbeat, shortness of breath & lightheadedness or it can have no symptoms at all. https://t.co/zKINYCyLRu https://t.co/5HDLI5RohB" / Twitter](https://pbs.twimg.com/media/C-_vSHAVYAE46Tc.jpg)