It's very rare, here is a beautiful abstract:
Autoregulatory mechanisms ensure relatively small fluctuations of blood pressure with postural changes in healthy people. Although orthostatic hypotension is well recognized and commonly encountered, there are only a few reports of orthostatic hypertension. Most of the reported cases of orthostatic hypertension were related to excessive venous pooling, with an initial drop in cardiac output followed by overcompensation with an excessive release of catecholamines, or to nephroptosis with orthostatic activation of the renin-angiotensin system. We describe a 44-year-old woman with normal supine blood pressure and severe orthostatic hypertension who did not demonstrate an initial decrease in cardiac output and had normal plasma and urinary catecholamines and renin release. Pharmacological tests of autonomic nervous system function showed an increased pressor sensitivity to norepinephrine (11 to 14 times normal), normal sensitivity to isoproterenol, diminished baroreceptor reflex sensitivity, and exquisite sensitivity to {alpha}-adrenergic blockers. This unusual case of orthostatic hypertension appears to be secondary to vascular adrenergic hypersensitivity.
2007-05-29 04:34:59
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answer #1
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answered by Dr.Qutub 7
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"Autoregulatory mechanisms ensure relatively small fluctuations of blood pressure with postural changes in healthy people. Although orthostatic hypotension is well recognized and commonly encountered, there are only a few reports of orthostatic hypertension. Most of the reported cases of orthostatic hypertension were related to excessive venous pooling, with an initial drop in cardiac output followed by overcompensation with an excessive release of catecholamines, or to nephroptosis with orthostatic activation of the renin-angiotensin system. " *1
The pathophysiology underlying orthostatic hypertension remains relatively poorly understood (Figure 1). This is due in part to an underappreciation of the phenomenon and in part to the diverse clinical conditions that can have orthostatic hypertension as a feature. As discussed above, Streeten et al. described a process of excessive venous pooling in the lower extremities upon standing, which leads to a decrease in cardiac output, a vigorous activation of the sympathetic nervous system, and excessive arteriolar vasoconstriction. This process may be analogous in some ways to the mechanism proposed for POTS which involves a partial dysautonomia in the lower extremities as an immediate upstream cause for excessive venous pooling. There must be substantive differences, however, as patients with POTS do not always exhibit orthostatic hypertension. *2
2007-05-29 01:31:55
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answer #2
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answered by Saif Bham 1
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While it is true that alcohol is a (physical and mental ) depressant, this is when taken in considerable quantities. But initially. i.e., in small quantities, it acts as a stimulant, and your one-a-day will be relatively harmless, and may indeed be of small positive benefit. Try it and see, -the world won't end, and you won't die. For the true alleviation of orthostatic hypotension however, you should read up on how pressure-suits were invented and developed, to combat the black-out mechanism which killed many early pilots in high-G dives and turns in the early '50's and 60's, the brain being starved of blood (and by extension, oxygen). It's the identical phenomenon, and wearing a tight vest will produce the similar effect, most of the blood in the veinous pool being prevented from being forced by gravity down into the trunk ,away from your brain, while the brain rises quickly
2016-03-13 01:18:38
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answer #3
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answered by Anonymous
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my dear...there is nothing like orthostatic hypertension... but there is a term called orthostatic hypotension.. this means that your blood pressure drops when you stand from sitting or lying down posture. normally if your BP falls by 30 mm hg we consider it orthostatic hypotension. No need to worry buddy.. its curable. increase salt intake.. take plenty of cirus fruit juices. start with mild exercise.. first rule out any curable cause. BEST OF LUCK.... DR
2007-05-29 02:32:02
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answer #4
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answered by fleming 2
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2017-03-05 02:09:24
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answer #5
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answered by Cooper 3
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do you mean ortho hypotension? that means your blood pressure drops when you rise from a lying position to a standing position...."hyper"tension is high BP, "hypo"tension means low BP.
2007-05-29 01:23:25
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answer #6
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answered by mago 5
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