Medical MCQ - How does chronic hypertension affect the range of arterial pressure over which the cerebral circulation can maintain relatively constant blood flow?

How does chronic hypertension affect the range of arterial pressure over which the cerebral circulation can maintain relatively constant blood flow?

Very little change occurs

The vasculature primarily adapts to higher arterial pressure

The vasculature primarily loses regulation at low arterial pressure

The entire range of regulation shifts to higher pressures

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Correct Answer:

The entire range of regulation shifts to higher pressures

Description:

Ans. D. THE entire range of regulation shifts to higher pressuresThe autoregulatory range is shifted to higher pressures because the arteries and arterioles increase their resistance. The functional and structural changes increase the arterial pressure at which autoregulation of blood flow occurs, but increase the lowest pressure at which blood flow can be maintained.

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