Arrhythmia is a disease, a traitor that can put you to death without any warning. With this, you always have to be ready if diagnosed with this heart disease. Better be equipped with an automated external defibrillator or AED that automatically detects and stops arrythmias. This can serve as a good investment for your health especially if there are members of your family who have the same health problem. Just buy a reliable brand of AED from a reliable store and you surely would have a good health investment.