Key result
Lowering blood pressure in hypertensive patients dilated small retinal arterioles, while larger arterioles dilated in only three younger patients and remained unchanged or narrowed in the remainder.
Why the study?
How does blood pressure lowering and oxygen inhalation affect retinal vessel caliber in hypertensive patients?
Observational
How does blood pressure lowering and oxygen inhalation affect retinal vessel caliber in hypertensive patients?
Blood pressure reduction leads to dilation of small retinal arterioles in hypertensive patients, suggesting that vessel narrowing is initially due to autoregulation but may become irreversible structural changes in long-standing hypertension.
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BP lowering dilated small retinal arterioles in this cohort; leaves open whether larger-vessel changes reflect reversible autoregulation or fixed remodeling.
Ramalho et al. (1968) conducted an observational in Hypertension. Blood pressure lowering vs. Baseline was evaluated on Caliber changes in retinal vessels. Lowering blood pressure in hypertensive patients dilated small retinal arterioles, while larger arterioles dilated in only three younger patients and remained unchanged or narrowed in the remainder.
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