Lack of correlation between microalbuminuria and endothelial function in essential hypertensive patients
To evaluate whether microalbuminuria, defined as urinary albumin excretion between 30 and 300 mg/24 h, is associated with endothelial dysfunction in essential hypertensive patients. We correlated urinary albumin excretion with vasodilatation in response to endothelium-dependent (acetylcholine) and -...
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Published in | Journal of hypertension Vol. 13; no. 9; p. 1003 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
01.09.1995
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Abstract | To evaluate whether microalbuminuria, defined as urinary albumin excretion between 30 and 300 mg/24 h, is associated with endothelial dysfunction in essential hypertensive patients.
We correlated urinary albumin excretion with vasodilatation in response to endothelium-dependent (acetylcholine) and -independent (sodium nitroprusside) agonists in the forearm vascular bed in essential hypertensive patients with (n = 13) and without (n = 23) microalbuminuria and matched normotensive controls (n = 21).
We studied forearm vascular responses (strain-gauge plethysmography) to intrabrachial infusion of acetylcholine (0.15, 0.45, 1.5, 4.5 and 15 ng/100 ml forearm tissue/min) and of sodium nitroprusside (1, 2, 4ng/100 ml forearm tissue per min). Minimal forearm vascular resistances (the ratio between mean arterial pressure and maximal forearm vasodilation induced by 13 min of ischaemia + 1 min of exercise) were also evaluated.
Responses to acetylcholine, but not to sodium nitroprusside, were significantly blunted and minimal forearm vascular resistances were increased in hypertensive patients compared with controls. However, no correlation was found between urinary albumin excretion and vasodilatation in response to acetylcholine or to sodium nitroprusside or between urinary albumin excretion and minimal forearm vascular resistances.
In hypertensive patients, increased urinary albumin excretion is associated neither with functional nor with structural dysfunction in the forearm vasculature. |
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AbstractList | To evaluate whether microalbuminuria, defined as urinary albumin excretion between 30 and 300 mg/24 h, is associated with endothelial dysfunction in essential hypertensive patients.
We correlated urinary albumin excretion with vasodilatation in response to endothelium-dependent (acetylcholine) and -independent (sodium nitroprusside) agonists in the forearm vascular bed in essential hypertensive patients with (n = 13) and without (n = 23) microalbuminuria and matched normotensive controls (n = 21).
We studied forearm vascular responses (strain-gauge plethysmography) to intrabrachial infusion of acetylcholine (0.15, 0.45, 1.5, 4.5 and 15 ng/100 ml forearm tissue/min) and of sodium nitroprusside (1, 2, 4ng/100 ml forearm tissue per min). Minimal forearm vascular resistances (the ratio between mean arterial pressure and maximal forearm vasodilation induced by 13 min of ischaemia + 1 min of exercise) were also evaluated.
Responses to acetylcholine, but not to sodium nitroprusside, were significantly blunted and minimal forearm vascular resistances were increased in hypertensive patients compared with controls. However, no correlation was found between urinary albumin excretion and vasodilatation in response to acetylcholine or to sodium nitroprusside or between urinary albumin excretion and minimal forearm vascular resistances.
In hypertensive patients, increased urinary albumin excretion is associated neither with functional nor with structural dysfunction in the forearm vasculature. |
Author | Taddei, S Ghiadoni, L Mattei, P Sudano, I Arrighi, P Salvetti, A Virdis, A |
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SubjectTerms | Acetylcholine - pharmacology Albuminuria - drug therapy Albuminuria - etiology Albuminuria - physiopathology Blood Pressure Dose-Response Relationship, Drug Endothelium, Vascular - drug effects Endothelium, Vascular - physiopathology Female Forearm - blood supply Humans Hypertension - complications Hypertension - drug therapy Hypertension - physiopathology Infusions, Intra-Arterial Male Middle Aged Nitroprusside - pharmacology Vascular Resistance Vasodilator Agents - pharmacology |
Title | Lack of correlation between microalbuminuria and endothelial function in essential hypertensive patients |
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