We will take care of your heart... cardiologist doctor near to me... Don't neglect your heart problems... Irregular Heart Beat: Arrhythmia Your heart beats because of electrical impulses, and they can get off rhythm. Arrhythmias can make your heart race, slow down, or quiver. They're often harmless and pass quickly, but some types can affect your blood flow and take a serious toll on your body. Tell your doctor if you notice anything unusual.