In the cardiac cycle, once the pressure in the left ventricle exceeds that in the aorta and the pressure in the right ventricle exceeds that in the pulmonary artery, the
a. A-V node is stimulated. c. A-V valves open.
b. semilunar valves open. d. semilunar valves close.
B
Once the pressure in the left ventricle exceeds the pressure in the aorta, the semilunar valve (aortic) opens and blood is rapidly ejected. When the pressure in the right ventricle exceeds that in the pulmonary artery, the semilunar valve (pulmonic) opens and blood is rapidly ejected.
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To prevent the patient from removing an endotracheal tube, the nurse's initial intervention will include:
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The nurse assessing a patient with secondary hypertension is aware that the difference between primary hypertension and secondary hypertension is that secondary hypertension:
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