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calcium channel blocker (or calcium blocker) - a medication that lowers blood pressure

capillaries - tiny blood vessels between arteries and veins that distribute oxygen-rich blood to the body

cardiac - pertaining to the heart

cardiac arrest - the stopping of heartbeat

cardiac catheterization - a diagnostic procedure in which a tiny, hollow tube (catheter) is inserted into an artery to go to the heart in order to image the heart and blood vessels

cardiac output - the amount of blood that goes through the circulatory system in one minute

cardiology - the clinical study and practice of treating the heart

cardiovascular (CV) - pertaining to the heart and blood vessel (circulatory) system

cardioversion - the procedure of applying electrical shock to the chest to change an abnormal heartbeat into a normal one.

cardiomyopathy - a disease of the heart muscle that causes it to lose its pumping strength

carotid artery - the major arteries in the neck that supply blood to the brain

cerebral embolism - a blood clot from one part of the body that is carried by the bloodstream to the brain where it blocks an artery

cerebral hemorrhage - bleeding within the brain

cerebral thrombosis - formation of a blood clot in an artery that supplies blood to the brain

cerebrovascular - pertaining to blood vessels in the brain

cerebrovascular accident - apoplexy or stroke; an impeded blood supply to the brain

cerebrovascular occlusion - an obstruction in the blood vessel in the brain

cholesterol - a waxy substance that is produced in the human body, animal fats, and in dairy products and is transported in the blood

cineangiography - the procedure of taking moving pictures to show the passage of dye through blood vessels

circulatory system - pertaining to the heart and blood vessels, and the circulation of blood

claudication - pain or fatigue in arms and legs due to poor supply of oxygen to the muscles

computed tomography (CT or CAT scan) - a non-invasive procedure that takes cross-sectional images of the brain or other internal organs; to detect any abnormalities that may not show up on an ordinary x-ray

congenital - present at birth

congestive heart failure - a condition in which the heart cannot pump out all of the blood that enters it, which leads to an accumulation of blood in the vessels and fluid in the body tissues

coronary arteries - two arteries that come from the aorta to provide blood to the heart muscle

coronary artery bypass graft (CAB or CABG) - a surgical procedure in which a healthy blood vessel is transplanted from another part of the body into the heart to replace or bypass a diseased vessel

coronary artery spasm - a sudden closing of an artery, which cuts off blood flow to the heart and causes symptom of angina or heart attack

coronary heart disease - a condition in which the coronary arteries narrow from an accumulation of plaque (atherosclerosis) and cause a decrease in blood flow

coronary occlusion - an obstruction of one of the coronary arteries that decreases flow to the heart muscle

coronary thrombosis - the formation of a clot in one of the arteries that carry blood to the heart muscle

cyanosis - insufficient oxygen in the blood


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