Cholesterol is a fat made by the liver from the saturated fat in your diet.
It's essential for healthy cells, but too much in the blood can lead to CHD.
Read more about high cholesterol.
High blood pressure
High blood pressure (hypertension) puts a strain on your heart and can lead to CHD.
Read more about high blood pressure.
Smoking is a major risk factor for coronary heart disease. Both nicotine and carbon monoxide (from the smoke) put a strain on the heart by making it work faster. They also increase your risk of blood clots.
Other chemicals in cigarette smoke can damage the lining of your coronary arteries, leading to furring of the arteries. If you smoke, you increase your risk of developing heart disease by 24%.
A high blood sugar level may lead to diabetes, which can more than double your risk of developing CHD.
Diabetes can lead to CHD because it may cause the lining of blood vessels to become thicker, which can restrict blood flow.