Merck Frosst
Patients and Caregivers

Heart Disease

Coronary Heart Disease

Heart

The heart is a powerful pump responsible for delivering blood to all the vital organs through a complex network of arteries and veins. It is essential that your heart, veins, and arteries remain in good condition. Arteries have different names, depending on what part of the body they supply; those supplying the heart itself are called coronary arteries. When these arteries are affected, the result is coronary heart disease.

What is coronary heart disease?

Coronary heart disease results from the coronary arteries becoming narrowed with fatty deposits on the inside wall. This narrowing reduces flow of blood to the heart and increases the chances of a blood clot blocking the artery, resulting in a heart attack.

How does it affect people?

As the coronary arteries narrow, patients will often experience chest pain or tightness, known as angina. This pain may spread to the left shoulder or arm, or to the neck and jaw. The pain can occur at times of exercise, stress, or strain, particularly in cold weather.

This site is for residents of Canada. / This site was updated on July 2nd, 2008.