Medtronic's Micra pacemaker wins approval for sale in U.S.

Medtronic PLC scored an industry first this month with U.S. approval to start selling its leadless pacemaker, Micra, which represents the first entry in what may become a new class of slender, minimally invasive pacemakers that rest entirely inside the heart. But if these new pacemakers are going to revolutionize the business of keeping hearts in rhythm, they will have to be perceived as safe.