Which class of antihypertensives is known as ACE inhibitors?

• A. Beta blockers
• B. Calcium channel blockers
• C. Thiazide diuretics
• D. Angiotensin-converting enzyme inhibitors

Answer: (D)

ACE inhibitors, or angiotensin-converting enzyme inhibitors, play a crucial role in managing hypertension. They work by inhibiting the action of the enzyme that converts angiotensin I to angiotensin II, a powerful vasoconstrictor. By blocking this conversion, ACE inhibitors help to lower blood pressure by allowing blood vessels to relax and widen, thereby reducing vascular resistance. This mechanism not only leads to decreased blood pressure but also benefits patients with heart failure, chronic kidney disease, and other cardiovascular conditions due to their protective effects on the heart and kidneys.

In contrast, other classes of antihypertensives mentioned in the options serve different mechanisms and therapeutic roles. Beta blockers focus on decreasing heart rate and contractility, which can lower blood pressure through reduced cardiac output. Calcium channel blockers work by inhibiting calcium entry into heart and vascular smooth muscle cells, leading to vasodilation and lower blood pressure. Thiazide diuretics reduce blood volume and lower blood pressure by increasing the excretion of sodium and water from the kidneys. Each of these classes contributes effectively to hypertension management, but ACE inhibitors specifically target the renin-angiotensin system, distinguishing them as a unique and integral choice in antihypertensive therapy.