The defects present in the structure of the heart or the great vessels at the time of birth are studied under congenital heart disease. Depending on the specific type of the defect, symptoms can vary from none to life-threatening. Rapid breathing, bluish skin, poor weight gain, and tiredness are some of its major symptoms. CHD complications can lead to heart failure. Pulmonary hypertension is a common condition in adults with CHD. It leads to increased blood pressure in the arteries of the lungs. This book unravels the recent studies in the field of congenital heart disease and pulmonary hypertension. Its aim is to present researches that have transformed this field and aided its advancement. This book aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.