system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 73-year-old woman comes to the physician because of recurrent episodes of losing consciousness for several seconds upon standing. She has a history of hypertension, which has been treated with hydrochlorothiazide. Her blood pressure is 130/87 mm Hg in the supine position and 100/76 mm Hg 30 seconds after standing up. Cardiac examination shows no abnormalities. Which of the following sets of changes is most likely to occur when the patient stands up?
 $$$ Venous return %%% Carotid sinus baroreceptor activity %%% Cerebral blood flow $$$
assistant
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