Cardiac arrhythmias are irregularities of the normal heartbeat. During an arrhythmia, the heart can beat too fast, too slow or with an irregular rhythm. An accurate diagnosis is necessary to evaluate the necessity of medical intervention. Particularly frequently occurs atrial fibrillation. One focus of the practice lies in the selection of individual treatment to improve quality of life and to avoid possible complications (stroke) as well as advising on available nowadays minimally invasive procedures (catheter ablation).