As Hjerteløber, you opt in to run out with an AED and provide life-saving CPR if a cardiac arrest occurs near you. You register and receive alerts via the TrygFonden Hjerteløber App, which you download here. You must be 18 years of age and able to provide cardiopulmonary resuscitation (CPR) to register as Hjerteløber. As a Hjerteløber, you are an extra resource for ambulance and other emergency services. The AMK / alarm centers automatically sends you an alert via the App if there is a cardia