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Heart Disease Glossary of Terms

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Cardiomyopathy: An abnormal heart condition in which the heart is dilated (poor pumping power), restrictive (impaired ability of the heart to fill), constricted (kept from filling due to external compression), and/or hypertrophic (enlarged heart).

Cardiopulmonary Recuscitation (CPR): A technique designed to temporarily circulate oxygenated blood through the body of a person whose heart has stopped. It involves assessing the airway; if necessary breathing for the person; determining if the person is without a pulse; and if necessary, applying pressure to the chest to circulate blood.

Cardiovascular: Relates to the heart and blood vessels.

Cardioversion: A procedure used to convert an irregular heart rhythm to a normal heart rhythm by applying electric shock or using certain medications.

Catheter: A slender, hollow, flexible tube.

Chest X-ray (CXR, chest film): A very small amount of radiation is used to produce an image of the structures of the chest (heart, lungs, and bones) on film.

Cholesterol: A fatty substance made by the body and found in some foods. Cholesterol is deposited in the arteries in coronary artery disease.

Chordae Tendinae: Thin chords that provide support to the tricuspid and mitral valves of the heart helping them to open and shut properly.

Clubbing: An abnormality where the ends of the fingers and toes enlarge and the nails curve; often it is related to an inadequate oxygen-rich blood supply, however it can be hereditary and completely normal. Often seen with congenital heart defects, but also seen in other conditions, such as emphysema or other lung diseases.

Coarctation of the Aorta: A severe narrowing of the aorta, causing a decrease in blood flow to the lower part of the body. This narrowing is a congenital defect and can be corrected with surgery or balloon angioplasty.

Collateral Blood Vessels: Small capillary-like branches of an artery that form over time in response to narrowed coronary arteries. The collaterals "bypass" the area of narrowing and help to restore blood flow. However, during times of increased exertion, the collaterals may not be able to supply enough oxygen-rich blood to the heart muscle.

Commissurotomy: A surgical procedure that helps to repair the damage caused by defective heart valves. In some patients, specifically those with rheumatic heart disease, this area of the heart (also called the commissures) can become scarred and the valve leaflets fail to open and allow blood to flow through easily. In this surgery, the commissures can be released or reopened.

Complex Carbohydrates: Starchy foods that are good sources of energy and nutrients, such as whole grain breads, rice, and pasta.

Congenital Heart Defects: Heart defects present at birth.

Congestive Heart Failure (CHF or heart failure): A condition where the heart muscle weakens and can't pump blood efficiently throughout the body.

WebMD Medical Reference

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