What are the tests for arrhythmia?

Arrhythmia Tests: Testing for an arrhythmia can include electrocardiography (ECG/EKG), 24 hour or 48 hour Holter Monitor, 2 week Zio event monitor, or 4 week event monitor. Other potential tests for longer term monitoring can include a monitor that implants under the skin. There is also invasive testing for arrhythmias by a Cardiac Electrophysiologist called an Electrophysiology Study.