Heart rhythm disorders, or arrhythmias, are conditions that cause irregular heartbeats or rhythms. This does not necessarily mean that the heart rate, how fast the heart beats, is abnormal though. Usually, the heart beats at a very purposeful beat, with electrical signals keeping the rhythm of contractions (beats) at a regular rhythm. Heart rhythm disorders upset this rhythm. Arrhythmias include premature contractions (which are early extra beats), fibrillation (which means fast, ineffective beating), fluttering and many others. The symptoms are different for each type of arrhythmia. Some people with arrhythmias do not have any symptoms and lead a normal life. Patients with symptoms will often feel tiredness, dizziness, chest pain, or shortness of breath. A physician can diagnose arrhythmias through physical examination and an ECG (electrocardiogram), which records the rhythm of your heartbeat. If a problem is found, the doctor will often follow up with an echocardiogram, an ultrasound that detects the structure and function of the heart to find the underlying problem of the arrhythmia. Many treatments are available for arrhythmias, the first being lifestyle changes, followed by medications, surgeries, or electronic heart devices.