Zio XT’s Zio AI engine analyses the continuous ECG recording after the patch is returned by mail, providing a physician report that summarises arrhythmia burden, longest pause, and fastest ventricular rate. Its 14-day wear duration dramatically increases the likelihood of capturing symptomatic episodes in patients with infrequent palpitations or syncope compared to traditional 24-48 hour Holter monitors. The discreet waterproof patch allows patients to shower, exercise, and sleep normally, improving compliance over bulky Holter harnesses. FDA-cleared and covered by Medicare and most private insurers in the United States. iRhythm’s AI algorithms are trained on one of the largest labelled ECG datasets in the world.