There are many different types of heart disease, and each one is caused by a different type of problem. These include structural abnormalities of the heart, problems with how blood flows to the heart or problems affecting the blood vessels that supply the heart.Structural heart disease is a term used to describe abnormalities in the structure of the heart, including valves, walls and muscles near the heart. These can occur at birth (congenital) or later in life as a result of infection, wear and tear or other factors. personal medical alarm CAD, or Coronary Artery DiseaseThe coronary arteries are the major blood vessels that supply your heart with oxygen-rich blood. If they become narrowed by a build-up of fatty substances (atheroma), they can block the supply of blood to parts of your heart muscle, causing chest pain or discomfort, or even a heart attack.Hypertrophic cardiomyopathyHypertrophic cardiomyopathy is a genetic condition where the walls of the heart muscles thicken and contract harder than they should, which can affect the ability of your heart to pump blood. This can cause a number of problems, such as swelling in the feet and legs, difficulty lying flat in bed or going up stairs and dizziness.Rheumatic heart diseaseThe heart can be damaged by rheumatic fever, which can lead to a heart condition called rheumatic heart disease. This is often a silent condition that does not show any symptoms until many years after the original illness.