If your heart beats too quickly, too slowly, or irregularly, you may be experiencing an arrhythmia. Our heart rhythm specialists (electrophysiologists, or EPs), diagnose and treat arrhythmia such as atrial fibrillation and other problems with the heart’s electrical system. Treatments include implanting medical devices to regulate your heart and minimally invasive procedures that use either heat (radiofrequency) or cold energy (cryoablation) to modify abnormal heart tissue and restore a healthy rhythm.