1. Calcium is an important element in the body for the performance of muscles, including the heart. Describe how calcium channel blockers are used in the treatment of hypertension.
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Calcium ions enter muscle cells, including cardiac and smooth muscle cells in blood vessels, through calcium channels, triggering contraction. Show more…
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Calcium channel blockers work to lower blood pressure by a. causing the kidneys to excrete more water and thus lower the blood volume. b. slowing the heart rate. c. acting as vasodilators, causing the muscles around blood vessels to relax. d. inhibiting an enzyme that causes blood vessels to contract.
9. What effect on heart rate and strength of contraction occurs from hypocalcemia? Why does hypocalcemia have this effect on heart rate and strength of contraction? 10. What effect on heart rate, arrhythmia, and/or strength of contraction occurs from hyperkalemia? Why does hyperkalemia have that effect on heart rate? 11. What effect on heart rate, arrhythmia, and/or strength of contraction occurs from hypokalemia? Why does hypokalemia have that effect on heart rate? 12. Describe why beta-blockers are given to patients with cardiac disease. What do they do and why are they helpful?
Supreeta N.
Which drug class is used to treat both hypertension and dysrhythmias? • Sodium channel blockers Calcium channel blockers • Alpha-adrenergic-blocking • Direct-acting vasodilators
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