what does an aed need to detect to deliver shock
All AEDs analyse the casualtyâs ECG rhythm and determine the need for a. shock. The semi-automatic AED indicates the need for a shock, which is delivered by. the rescuer, while the fully automatic AED administers the shock without the. need for intervention by the rescuer, semi-automatic AEDs with manual. override have the facility to enable the operator (normally a healthcare.