An 81-year-old woman has the sudden onset of dyspnea and palpitations with chest pain. A pulmonary ventilation-perfusion scan is performed and indicates a high probability for a perfusion defect involving right segmental pulmonary arterial branch. Of the following findings or conditions, which is the most important factor favoring development of these findings?
A An increased white blood cell count

B Cirrhosis of the liver

C Altered blood flow with stasis

D An increased platelet count

E Generalized atherosclerosis



Answer / Explanation:

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(C) CORRECT. She has a pulmonary thromboembolus. Stasis predisposes to thrombosis, as is evidenced by the danger for thromboembolism in hospitalized patients.
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