The Syndrome of Primary Orthostatic Hypotension

Chokroverty, Sudhansu; Barron, Kevin D.; Katz, Fred H.; Greco, Fréderic; Sharp, John T.

doi:10.1093/brain/92.4.743

Cited by 64 publications

(26 citation statements)

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“…in patients with orthostatic hypotension due to other neurological disorders have produced conflicting evidence for the role of the sym pathetic nervous system in renin release. It has been suggested that an integrated sympathetic nervous system is necessary (Gordon, Kuchel, Liddle & Island, 1967;Chokroverty, Barron, Katz, Del Greco & Sharp, 1969) but our present observations fail to support this view. Corbett, Frankel and Harris (1971C) have investigated the cardiovascular responses to change of posture in tetraplegic man and considered that any blood pressure overshoot they observed immediately after return to the supine position was associated with a spasm of skeletal muscles.…”

contrasting

confidence: 99%

Orthostatic hypotension and the renin-angiotensin system in paraplegia

1971

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contrasting

confidence: 99%

Orthostatic hypotension and the renin-angiotensin system in paraplegia

1971

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“…Clark et al (1979) reported that diabetic neuropathy was incapable to increase norepinephrine and renin release in response to postural changes with impaired sympathetic efferent nerve, which might, in turn, result in hypotension. Bannister et al (1977) and Chokroverty et al (1969) also showed the similar findings in non-diabetic neurophathy. In the present study, plasma norepinephrine and renin activity were not determined,but observed postural hypotension might indicate the presence of impaired catecholamine and renin release.…”

Section: Discussionsupporting

confidence: 77%

Changes in Plasma Vasopressin Levels and Cardiovascular Function due to Postural Changes in Diabetic Neuropathy.

Sato

Kimura

Ota

et al. 1995

Tohoku J. Exp. Med.

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Decreases in blood pressure are well known to increase the release of vasopressin. Studies were carried out to investigate whether vasopressin responses to postural changes in blood pressure are maintained in diabetic patients with orthostatic hypotension [DM-OH( +)] as well as non-diabetic patients with orthostatic hypotension [nonDM-OH( +)] and these responses were compared with them observed in normal subjects and diabetic patients without orthostatic hypotension [DM-OH( -)] . After 30 min in the supine position, the upright posture for 40 min was maintained and then the supine for 10 min. Blood pressure and heart rate (HR) were measured every 5 min and plasma vasopressin levels (plasma AVP) were determined every 10 min. In normal subjects and DM-OH( -), mean arterial blood pressure (MABP) did not change, but HR increased significantly by the upright position. Plasma AVP did not change in these group. On the other hand, in DM-OH( +) MABP fell abruptly and remained to decrease during the upright posture. The HR responses in this group, however, were similar to those in normal control and DM-OH( -). Plasma AVP in DM-OH( + ) significantly increased only at 30 min during upright. These increases were significantly greater than those in normal and DM-OH( -). There were significant correlation in changes in MABP (JMAP) and plasma AVP (zJAVP) in DM-OH( +) p<0.01).Relationship between aMABP and QAVP in nonDM-OH( +) was similar to that in DM-OH( +). It is concluded that AVP responses to orthostatic hypotension in diabetic and nondiabetic neuropathies were attenuated, but heart rate responses in these patients ware well reserved. hypotension; diabetes mellitus; blood pressure; heart rate; baroreflex

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“…We also found ten subjects with EMG 17 workers studied (40%) changes in the EMG that were indicative of CTS.7 Nevertheless, his data contain no clinical evaluation and it must be emphasised that a diagnosis of CTS must be based on clinical verification. Ahlborg and Voog undertook a case control study of the occurrence of CTS among workers exposed to hand-arm vibration and according to their results, heavy manual work increased the risk of CTS by a factor of two; when combined with handarm vibration the risk was increased by a factor offive.…”

Section: Discussionmentioning

confidence: 76%

Forestry workers exposed to vibration: a neurological study.

Färkkilä¹,

Pyykkö²,

Jäntti³

et al. 1988

Occupational and Environmental Medicine

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Neurological findings were examined in 186 forestry workers with a mean exposure to chain saw vibration of 16-6 hours. The prevalence of active vibration induced white fingers was 5%, parethaesias of the hands 53%, and muscle weakness 13%. Clinical polyneuropathy was observed in 16 forestry workers in the hands (7.5%) which did not correlate with alcohol consumption. Seventy nine forestry workers of the total population were selected for electromyographic examination.

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The Syndrome of Primary Orthostatic Hypotension

Cited by 64 publications

References 0 publications

Orthostatic hypotension and the renin-angiotensin system in paraplegia

Orthostatic hypotension and the renin-angiotensin system in paraplegia

Changes in Plasma Vasopressin Levels and Cardiovascular Function due to Postural Changes in Diabetic Neuropathy.

Forestry workers exposed to vibration: a neurological study.

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