A Glossary of Heart Failure Terms
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.
Carotid Artery: A vessel that supplies the brain with oxygenated blood.
Carotid Artery Disease: A progressive disease that involves the buildup of fatty material and plaque in the carotid arteries; can lead to a stroke.
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.
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 and sometimes with balloon dilation.
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 open blocked or defective heart valves. In some patients, specifically those with rheumatic heart disease, the edges of the valve leaflets (also called the commissures) can become fused together, preventing the valve leaflets from opening and allowing blood to flow through easily. In this surgery, the commissures are cut open to allow for valve opening.
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, causing the body to hold onto salt and fluids.
Constrictive Pericarditis: The pericardium is the sac around the heart. In people with constrictive pericarditis, this sac becomes inflamed and scarred leading to shrinkage of the pericardium. This can prevent the heart from filling to its full extent.
Coronary Arteries: Network of blood vessels that branch off the aorta to supply the heart muscle with oxygen-rich blood. There are two main coronary arteries: the right and the left. The left splits into two arteries called the circumflex and the left anterior descending (LAD) arteries.