A new system might help those in danger of heart attacks: Scientists are currently testing the AngelMed Guardian System in patients at risk for repeated heart attacks, and it’s showing early promise in warning patients when to seek medical intervention to ward off a heart attack. The device is implanted near the collarbone under the skin, and includes an internal EKG that triggers an alarm in an external beeper if heartbeat becomes irregular or if inadequate oxygen is detected. It’s especially helpful for patients who don’t experience typical heart attack systems, and also prevents needless, expensive tests by allowing doctors to determine when a heart attack hasn’t occurred. Similar devices are already in use in Germany and Brazil, and if the AngelMed Guardian System receives FDA approval, it could be available here by 2015.