This book is a detailed clinical compilation on sudden cardiac death causes. From the various geographical regions of the world comes different clinical perspectives toward the SCD problem that shed light on the predictors and estimated prevalence in genetic inheritance worldwide. For many centuries, the mysterious deaths of prominent professional sportsmen have preoccupied the attention of the media and medical professionals. In some cases, it was possible to obtain the medical histories of the victims, data on the presence of some specific diseases, and conditions or potential symptoms preceding the fatal episode. Various rare inherited syndromes that are associated with congenital heart disease are focused on in this study, and the interrelationship between ventricular premature beats, sustained/non-sustained ventricular tachycardias and ventricular fibrillations are discussed.