Zoll Medical Corporation develops and leases a wearable cardioverter defibrillator (ASSURE WCD) and integrated digital health platform designed to protect high-risk cardiac patients from sudden cardiac arrest. The company sells through a direct lease model, billing Medicare, Medicaid, and commercial insurers monthly rental fees while patients wear the non-invasive device, which provides continuous cardiac monitoring and therapeutic shock capability. The platform targets cardiologists and heart specialists managing patients post-myocardial infarction, with newly diagnosed heart failure, or with documented arrhythmias, addressing a large domestic and international patient population at risk of life-threatening cardiac events.