San Francisco's iRhythm Technologies won coverage from a major insurer for its flagship arrhythmia monitoring patch, a big win in what has become a brutal reimbursement environment for many med tech companies. Aetna, the third biggest private health insurer in the U.S., will cover iRhythm's ZIO Service that provides long-term continuous monitoring for patients with suspected heart arrhythmias. The company insists that its technology can help boost patient outcomes and reduce healthcare costs--the kind of pitch that gains attention in the current healthcare climate. The system includes a water-resistant patch that captures and analyzes heart data. It represents a major advance over the current standard of care: monitors worn over the neck, like a necklace, that are connected to the chest via wires and conductive patches. ZIO launched commercially in 2011. Item