CHELMSFORD, Mass.--(BUSINESS WIRE)--ZOLL Medical Corporation (Nasdaq GS: ZOLL), a manufacturer of resuscitation devices and related software solutions, announced today that over 12,000 patients at high risk of sudden cardiac arrest (SCA) have been prescribed the ZOLL LifeVest® Wearable Defibrillator by their physician since it was approved by the FDA in 2002. This represents over 2,000 years of cumulative patient time wearing a LifeVest, and, in any given month, more than 1,000 patients are being protected from sudden death wearing the LifeVest.