Ambulatory heart rhythm monitoring is used to diagnose disorders of the heart rhythm.  A 24-hour EKG monitor (also known as a holter) records every heart beat for an entire day.  Event monitors and King of Hearts monitors are used to record the heart rhythm during symptoms and require the patient to activate the device.  These monitors are usually loaned out for periods of up to three weeks.  For longer term heart rhythm monitoring a device called a Reveal monitor can be implanted under the skin and data downloaded on a periodic basis in our device clinic.