A nurse in the rehabilitation unit is caring for a 72-year-old patient who is in cardiac rehabilitation following a myocardial infarction. The nurse's plan of care calls for the patient to walk for 15 minutes three times a day
The patient asks why "walking is good for his heart." The nurse's best response is:
A) "The arteries in your legs constrict when you walk and allow the blood to move faster and with more pressure on the tissue."
B) "Walking decreases the heart's pumping ability and increases your heart rate and blood pressure; therefore your heart in under less stress."
C) "Walking helps your heart adjust to your new arteries and provides a way to have fun."
D) When you walk, the muscles in your legs contract and pump the blood in your veins back toward your heart, which allows more blood to return to your heart."
Ans: D
Feedback: Veins, unlike arteries, are equipped with valves, which allow blood to move against the force of gravity. The legs have one-way bicuspid valves that prevent blood from seeping backward as it moves forward by the muscles in our legs pressing on the veins as we walk, increasing venous return. Option A is incorrect; the arteries in the legs do constrict when you walk, which allows the blood to move faster and with more pressure on the tissue. However, the greater concern is increasing the flow of venous blood to the heart. Option B is incorrect; walking increases, not decreases, the heart's pumping ability, which increases heart rate and blood pressure and increases the heart's ability to manage stress. Option C is incorrect; the patient had a myocardial infarction so there are no "new arteries."
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