The diseases which impact the blood or heart vessels fall under the category of heart disease. It involves various conditions, which affect the normal heart function. Its types include arrhythmia, atherosclerosis, cardiomyopathy, coronary artery disease, congenital heart defects and heart infections. Symptoms of heart disease comprise chest pressure, chest pain, discomfort and tightness in chest. Its risk factors are a family history of heart disease, high blood pressure, diabetes, poor diet, high cholesterol, obesity, physical inactivity and stress. Treatment of heart diseases vary based on the type of disease and can be classified into three major categories, which are lifestyle changes, medications, and invasive procedures of surgery. Various advances in their treatment include genetic and stem cells techniques, which enable treatment at cellular and subcellular levels. Furthermore, highly sensitive and non-invasive imaging techniques are evolving in diagnostic imaging. The topics included in this book on heart diseases are of utmost significance and bound to provide incredible insights to readers. It will also provide interesting topics for research which interested readers can take up. The extensive content of this book provides the readers with a thorough understanding of these diseases.