ACE Inhibitors (Angiotensin Converting Enzyme Inhibitors).

What is an angiotensin converting enzyme (ACE) inhibitor? Angiotensin converting enzyme (ACE) is a substance in the body that converts an inactive blood chemical to a very active blood vessel constrictor, or "squeezer." Blood vessel constrictors narrow the internal diameter of blood vessels. The body uses ACE to help regulate the blood pressure by making the blood vessels constrict when blood pressure needs to be higher. In some people with high blood pressure (hypertension) the enzyme is overactive. This can cause high blood pressure and increase the workload of the heart and other organs.

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