Ans. There are various types of heart disease in general population like congenital heart disease e.g. some structural defect in heart by birth commonly known as hole in heart. Rheumatic heart disease usually occurs in young adult commonly known as valvular heart disease. Coronary artery disease is most common in general population. There is narrowing of coronary arteries due to deposition of bad cholesterol. This leads to Angina or Acute myocardial infarction.