There are many methods of Pad placement but AHA (American Heart Association) advises the user to attach the Pads onto the front and lateral sternal with consideration for placement and training. It is the best method to attach the Pads onto the front and lateral sternal or the parts which pass the electric shock directly into the heart. In the other words, it’s the best method for child. For adults, however, it is difficult to reverse adults and attach the Pads onto their back so, it is commonly for users to attach the Pads on the diagonal.