ABSTRACT
Implantable Medical Devices (IMDs) have been widely used to treat various diseases. Examples of IMDs include oximeters [1], defi brillators, pacemakers [2], and patient monitors [3]. In cardiac patients, if an emergency occurs, a pacemaker needs to send the alarm to a doctor or a local hospital. As IMDs have signifi cant applications, more and more people are beginning to develop different types of IMDs such as drug pump, neuro-stimulator, etc.
