iRhythm Technologies is a medical device company that develops and commercializes solutions for cardiac arrhythmia detection. The company's flagship product is the Zio XT, a wearable patch that continuously monitors a patient's heart rhythm for up to 14 days. The Zio XT is designed to improve the detection and diagnosis of cardiac arrhythmias, which can be difficult to diagnose due to their intermittent nature. iRhythm Technologies was founded in 2006 and is headquartered in Redwood City, California. The company went public in 2016 and is traded on the NASDAQ stock exchange under the ticker symbol IRTC.