This book covers many topics of current interest to cardiologists and physiologists ranging from cardiac conducting system to recent therapeutic approaches and researches made in the area of heart treatment. This book includes chapters on cardiac conducting system, sinoatrial node, cardiac Purkinje fibers, His system, its electrovector-cardiographic demonstration and sympathetic innervations in human heart including their autonomic regulation.   Another major highlight of this book is chapters on ablation of atrial fibrillation and ventricular fibrillation, cardiac dysfunctions, blood cholinesterase levels and QTc interval in patients with organophosphate poisoning. Besides these, sex-related differences in serum troponin in cardiac surgery have also been discussed.  Lastly, there are some chapters on myocardial repair by angiomyogenesis, suitable therapies for pathophysiology, diagnosis, medical management and nonpharmacological management of therapeutic schemes and future directions  which have also been analyzed.