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NBME Free 120 Answers

free120/Block 3/Question#35 (reveal difficulty score)
A 55-year-old man comes to the physician for ...
Increased peripheral vascular resistance ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–

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 +2  upvote downvote
submitted by โˆ—bwdc(697)

The only thing that directly raises BP of the list is increased PVR.

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amedhead  would decreased cardiac output not also increase the blood pressure due to sympathetic activation of the baroreceptor reflex? +
bwdc  I think youโ€™re ignoring a directly correct answer, increased PVR literally equals increased BP, and are instead trying to postulate an indirectly plausible answer. Decreased CO, as you just implied, means less blood pumping into the aorta and less blood pounding and stretching the arteries and thus decreased BP. Note, your original logic would apply to stroke volume just as easily. Yes, a sympathetic response could then occur as a response to mitigate this, such as in shock or heart failure, but it would misleading to suggest that decreased CO causes hypertension. +3

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