FAQs Some of the more commonly asked questions are answered here. If you have a question about AEDs, CPR, life-saving skills or resuscitation that you would like us to answer for you, please contact us at: email@example.com We will reply to you directly and confidentially. Our information sheets are available for you to download and can tell you about some of the important features of AEDs (defibrillators) and how the heart is affected by a cardiac arrest. You'll find these in the 'Related downloads' section on the right of this page. What is a cardiac arrest? What is a heart attack?