New, implantable device could warn patients of potential heart attack

A new implantable medical device, currently undergoing clinical trials, could warn patients of an impending heart attack. The AngelMed Guardian uses a combination of vibrations, audible tones, and visual warnings to alert a patient of potential trouble. The device has two levels of alarm urgency: high-priority, which means a patient might be having a heart attack and should call 911, and low-priority, which indicates a condition for which the patient should visit the doctor within two days...