Kestra Medical Inc. seems to have put itself in a position to take a bite out of the market for wearable defibrillators with the results of the ASSURE WCD study, which enrolled more than 21,600 patients. The study, whose results were reported on at the American Heart Association annual meeting in New Orleans, demonstrated that Kestra’s unit delivered an inappropriate shock rate of only 0.0065 per patient per month, an outcome that analysts at Wells Fargo said will allow Kestra to close the gap on competitors such as Zoll Medical.