LEXINGTON, Mass.--(BUSINESS WIRE)--Imprivata® (NYSE: IMPR), the healthcare IT security company, announced today that The American Hospital Association (AHA) has exclusively endorsed Imprivata Cortext® for the Secure Messaging category in an effort to address the current communication inefficiencies with pagers plaguing care delivery. AHA Endorsement is awarded to products and services that help member hospitals and healthcare organizations achieve operational excellence. Imprivata Cortext is a