Final answer:
Automated External Defibrillators (AEDs) are devices designed to correct abnormal heart rhythms during cardiac emergencies, with automatic versions delivering a shock without user intervention, while semi-automatic versions require the rescuer to initiate the shock.
Step-by-step explanation:
Automatic vs. Semi-Automatic AED Devices
Automated External Defibrillators (AEDs) are life-saving tools used during cardiac emergencies to deliver a shock and restore normal heart rhythm in cases of ventricular fibrillation or cardiac arrhythmias. Commonly found in ambulances and public places, AEDs provide verbal instructions and can be operated by lay persons. They are equipped to automatically diagnose a patient’s heart rhythm and deliver a shock with appropriate energy and waveform.
Automatic AEDs will analyze the heart’s rhythm and automatically administer a shock if needed, while semi-automatic AEDs require the rescuer to press a button to administer the shock after the device determines it is necessary. Both units use an electrocardiogram (ECG or EKG) to analyze the patient’s heartbeat pattern. CPR is recommended before the use of an AED, as it can help circulate blood and increase the chances of a successful defibrillation.