iRhythm's Zio patch cardiac rhythm monitor provides continuous monitoring for up to 14 days. It's intended for asymptomatic patients or those with secondary symptoms. The patch is worn on the chest and is recyclable.
Another iRhythm product, the Zio event card, is a prescription-only device that provides continuous ECG monitoring. The disposable device is about the size of a credit card and weighs less than two ounces. It can be worn around the neck or on a belt clip for up to 30 days. The card scans for ECG data all day and night, but only stores symptomatic data. If the patient is experiencing symptoms, he presses a button that causes the card to store the previous 45 seconds of ECG data plus the first 15 seconds after the button is pressed. The patient then calls the iRhythm National Clinical Center for further instructions on how to transmit the data.