A term used to describe any structure that encircles like a crown: In medical practice, it refers to the coronary arteries that encircle and supply the heart muscles with blood.

An operation to circumvent the narrowed or blocked arteries by grafting on additional blood vessels for the flowing of blood.

Damage to or malfunctions of the heart that are caused by narrowing or blockage of the arteries which supply blood to the heart muscle: Two of the manifestations of coronary heart disease (CHD) are "angina pectoris" or chest pain that is usually associated with physical discomfort or anxiety by the patient and acute "myocardial infarction" (AMI) (obstruction of the blood supply) or a heart attack.

The passage of blood through the arteries of the heart: When the heart is unable to provide coronary perfusions naturally, an external device may be used to keep the blood flowing through these blood vessels.

An intracardiac electrogram which records electrical potentials within the coronary sinus: A coronary sinus electrogram is used for the indirect monitoring of the left ventricular hollow parts or cavities in an organ or in each of the two main chambers of the heart, left and right.

The narrowing or blockage of one of the coronary arteries which supply blood to the heart by a thrombus or clot: Coronary thrombosis causes a section of the heart muscle to die because it has been deprived of oxygen which is one of the major causes of death in the U.S.