Arrhythmia: "Arrhythmias are disorders of the regular rhythmic beating of the heart. They're common — as many as 2.2 million Americans are living with atrial fibrillation (one type of rhythm problem). Arrhythmias can occur in a healthy heart and be of minimal consequence. They also may indicate a serious problem and lead to heart disease, stroke or sudden cardiac death. The goal of this site is to help the public and healthcare professionals learn more about arrhythmias, and ultimately reduce disability and death from heart disease and stroke. Do your part by learning the facts and taking the steps needed to understand and control arrhythmias."