The common symptoms of coronary artery disease are:
Shortness of breath
Chest pain
Heart attack due to complete blockage of the coronary artery

Yes, you can prevent coronary heart disease by improving your heart health:
Quit smoking
Stay physically active
Maintain a healthy body weight
Reduce and manage stress
Eat low-fat foods
Eat a low-salt diet that is rich in vegetable and fruits

Yes, a surgery helps to improve blood flow around the blocked coronary artery. A bypass surgery is an open-heart surgery and is reserved for cases of multiple narrowed coronary arteries.

Diet including trans fat, excess sugar, excess salt and saturated fat should be avoided if you have a risk of coronary artery disease. Alcohol in excess should also be avoided.

When the major blood vessels that supply blood, nutrients and oxygen to the heart are diseased or damaged, the condition is called coronary artery disease.