What is the primary action of calcium channel blockers?

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Question: What is the primary action of calcium channel blockers?

Options:

Correct Answer: Decrease myocardial oxygen demand

Solution:

Calcium channel blockers primarily decrease myocardial oxygen demand by reducing contractility and heart rate.

What is the primary action of calcium channel blockers?

What is the primary action of calcium channel blockers?

Step 1: Understand that calcium channel blockers are medications.
Step 2: Know that these medications affect the heart and blood vessels.
Step 3: Learn that calcium channel blockers work by blocking calcium from entering heart and blood vessel cells.
Step 4: Recognize that calcium is important for heart muscle contraction.
Step 5: Realize that by blocking calcium, these medications reduce the strength of heart contractions (contractility).
Step 6: Understand that a weaker contraction means the heart doesn't have to work as hard.
Step 7: Know that calcium channel blockers also slow down the heart rate.
Step 8: Conclude that by reducing both contractility and heart rate, calcium channel blockers lower the heart's oxygen demand.

No concepts available.