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Home Q & A Board Biology-Related Homework Help Medicine
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gaoxing01 gaoxing01
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6 years ago
A patient is taking a calcium channel blocker (CCB) for stable angina. The patient's spouse asks how calcium channel blockers relieve pain. The nurse will explain that CCBs:
 
  a. help relax peripheral arterioles to reduce afterload.
  b. improve coronary artery perfusion.
  c. increase the heart rate to improve myo-cardial contractility.
  d. increase the QT interval.
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#1
6 years ago
A
CCBs promote relaxation of peripheral arterioles, resulting in a decrease in afterload, which re-duces the cardiac oxygen demand. CCBs do not improve coronary artery perfusion. CCBs reduce the heart rate and suppress contractility; they do not affect the QT interval.
gaoxing01 Author
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#2
6 years ago
thank you so much for providing this
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