This book compiles significant researches by renowned experts. A lot of people all over the world depend on suitable, well-timed shocks from implantable cardioverter-defibrillators (ICDs) to evade sudden death due to cardiovascular malfunctions. Hence, information related to the usage, functions, and clinical importance of ICDs is very important for increasing the knowledge used to avert and control fatal cardiovascular actions. Therefore, the studies enclosed in this book will be pertinent to modern ICD usage and important in developing ICD technology. It covers various aspects related to ICDs, including defibrillator technology, avoiding and handling nearly fatal cardiovascular incidents, special cases in ICD patients, etc. This book will be beneficial for readers interested in learning more about ICDs.