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Orthostatic hypotension 1

Synonyms
Dopamine beta-hydroxylase deficiency; Dopamine beta-hydroxylase deficiency, congenital; NORADRENALINE DEFICIENCY; NOREPINEPHRINE DEFICIENCY; Orthostatic hypotension 1, due to DBH deficiency
Modes of inheritance
Autosomal recessive inheritance (Orphanet)

Summary

Dopamine beta-hydroxylase (DBH) deficiency is characterized by lack of sympathetic noradrenergic function but normal parasympathetic and sympathetic cholinergic function. Affected individuals exhibit profound deficits in autonomic regulation of cardiovascular function that predispose to orthostatic hypotension. Although DBH deficiency appears to be present from birth, the diagnosis is not generally recognized until late childhood. The combination of ptosis of the eyelids in infants and children, together with hypotension, is suggestive of the disease. In the perinatal period, DBH deficiency has been complicated by vomiting, dehydration, hypotension, hypothermia, and hypoglycemia requiring repeated hospitalization; children have reduced exercise capacity. By early adulthood, individuals have profound orthostatic hypotension, greatly reduced exercise tolerance, ptosis of the eyelids, and nasal stuffiness. Presyncopal symptoms include dizziness, blurred vision, dyspnea, nuchal discomfort, and chest pain; symptoms may worsen in hot environments or after heavy meals or alcohol ingestion. Life expectancy is unknown, but some affected individuals have lived beyond age 60 years. [from GeneReviews]

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  • Also known as: DBM, ORTHYP1, DBH
    Summary: dopamine beta-hydroxylase

Clinical features

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Imported from Human Phenotype Ontology (HPO)

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