Calcium Channel Blockers
(CCBs)

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What are calcium channel blockers and how do they work?

In order to pump blood, the heart needs oxygen. The harder the heart works, the more oxygen it requires. Angina (heart pain) occurs when the supply of oxygen to the heart is inadequate. By dilating the arteries, CCBs reduce the pressure in the arteries. This makes it easier for the heart to pump blood, and, as a result, the heart needs less oxygen. By reducing the heart's need for oxygen, CCBs relieve or prevent angina. CCBs also are used for treating high blood pressure because of their blood pressure-lowering effects. CCBs decrease the excitability of heart muscle and are therefore used for treating certain types of abnormally rapid heart rhythms.

Medically Reviewed by a Doctor on 8/11/2014



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