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Antigen
A foreign molecule or substance, such as a transplant, that triggers an immune response. This response may be the production of antibodies.
Antihypertensive Drug
A drug that reduces hypertension (high blood pressure).
Antioxidant
Part of a group of vitamins (A, B, C and E) that may help to limit the cellular damage caused by free radicals. Studies suggest that certain antioxidants may protect against coronary artery disease.
Antiplatelet Medication
A medication, such as aspirin or Plavix (clopidogrel), used to prevent platelets from clumping together and causing the formation of blood clots. Used for people at risk for stroke or blood clots.
Aorta
Large artery leaving the heart. All blood pumped out of the left ventricle travels through the aorta on its way to other parts of the body.
Aortic Arch Replacement
The aortic arch is that segment of the aorta between the ascending and descending portions. The aortic arch provides the origin of the blood vessels to the upper part of the body, specifically the arms and head. Surgical diseases of…
Aortic Dissection
The aorta is the main blood vessel leaving the heart and provides blood flow to the rest of the body. This blood vessel is made up of many layers. In certain circumstances, a tear develops in the middle layer, which…
Aortic Insufficiency
Aortic insufficiency refers specifically to the aortic valve, which is the valve the blood passes through as it leaves the heart and enters the aorta. When blood leaks back through the valve it is known as aortic insufficiency. Small amounts…
Aortic Intervention
Medical procedures aimed at treating conditions involving the aorta- restoring proper blood flow and preventing potential complications.
Aortic Valve
The aortic valve is the last valve through which the blood passes before it enters the aorta or main blood vessel of the body. The valve prevents blood from leaking back into the left ventricle from the aorta after it…