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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

Excerpted from the GeneReview: Dopamine Beta-Hydroxylase Deficiency
Dopamine beta-hydroxylase (DBH) deficiency is characterized by lack of sympathetic noradrenergic function resulting in profound deficits in autonomic regulation of cardiovascular function (orthostatic hypotension) and other autonomic dysfunction (ptosis, nasal stuffiness, sleep difficulties, and impaired ejaculation in males). Although DBH deficiency is present from birth, the diagnosis is often not generally recognized until late childhood. In the perinatal period, DBH deficiency has been complicated by vomiting, dehydration, hypotension, hypothermia, and hypoglycemia requiring repeated hospitalization, and the diagnosis may be identified fortuitously in the neonatal period with investigation of hypoglycemia. Children may report reduced exercise capacity. By early adulthood, individuals have profound orthostatic hypotension, greatly reduced exercise tolerance, ptosis, 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. Some individuals have abnormal kidney function, joint laxity, hypotonia, high-arched palate, anemia, and/or hypoglycemia.
Full text of GeneReview (by section):
Summary
Diagnosis
Clinical Characteristics
Genetically Related (Allelic) Disorders
Differential Diagnosis
Management
Genetic Counseling
Resources
Molecular Genetics
Chapter Notes
References
Authors:
Italo Biaggioni
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Available tests

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Clinical tests (20 available)

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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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