Neurally mediated hypotension: Difference between revisions
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'''Neurally mediated hypotension''' or '''NMH''' is an abnormality in regulating blood pressure experienced when the person is upright.<ref name="Bested" /> NNH causes a drop of 20–25 mm Hg in systolic blood pressure when a person is standing still compared to lying down. NMH is a form of chronic [[orthostatic intolerance]].<ref name="Bested" /> | |||
'''Neurally mediated hypotension''' | |||
==Signs and symptoms == | |||
Symptoms may include lightheadedness, [[dizziness]], pressure-like left-side [[chest pain]], visual changes, weakness, slower speech or slowed verbal response, pallor, an immediate urge to lie down and syncope.<ref name="Bested">{{Cite journal|last=Bested|first=Alison C.|author-link=Alison Bested|last2=Marshall|first2=Lynn M.|author-link2=|last3=|first3=|author-link3=|last4=|first4=|author-link4=|last5=|first5=|author-link5=|last6=|first6=|author-link6=|last7=|first7=|last8=|first8=|date=2015-12-01|title=Review of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: an evidence-based approach to diagnosis and management by clinicians|url=https://www.degruyter.com/view/journals/reveh/30/4/article-p223.xml|journal=Reviews on Environmental Health|language=en|volume=30|issue=4|pages=223–249|doi=10.1515/reveh-2015-0026|issn=0048-7554|pmc=|pmid=|access-date=|quote=|via=}}</ref> | |||
Blood pressure readings taken lying down and when upright can be compared to assess for a drop in systolic blood pressure.<ref name="Bested" /> For example, a blood pressure of 130/85 mm Hg may change to 100/85 mm Hg when the person stands, and does not return to normal. | |||
==Explanation == | |||
According to ''Blood Pressure Updates'', neurally mediated hypotension "is a complication that occurs due to unnatural reflex action between the brain and heart, though they are structurally normal. Neurally mediated hypotension is also called fainting reflex, or vasodepressor syncope or neurocardiogenic syncope or autonomic dysfunction or vaso-vagal reflex. Syncope is the formal medical term used for fainting." <ref>[http://www.blood-pressure-updates.com/bp/low-bp/low-blood-pressure-treatment/neurally-mediated-hypotension.htm Blood Pressure Updates - Neurally Mediated Hypotension]</ref> | |||
== See also == | == See also == | ||
*[[Orthostatic intolerance]] (OI) | |||
*[[Postural orthostatic tachycardia syndrome]] (POTS) | |||
*[[Autonomic nervous system]] | |||
*[[Dizziness]] | *[[Dizziness]] | ||
*[[Hypotension]] | *[[Hypotension]] | ||
*[[Tilt table test]] | *[[Tilt table test]] | ||
== References == | ==Learn more== | ||
==References == | |||
{{Reflist}} | |||
[[Category:Diagnoses]] | [[Category:Diagnoses]] | ||
Revision as of 16:59, September 18, 2020
Neurally mediated hypotension or NMH is an abnormality in regulating blood pressure experienced when the person is upright.[1] NNH causes a drop of 20–25 mm Hg in systolic blood pressure when a person is standing still compared to lying down. NMH is a form of chronic orthostatic intolerance.[1]
Signs and symptoms[edit | edit source]
Symptoms may include lightheadedness, dizziness, pressure-like left-side chest pain, visual changes, weakness, slower speech or slowed verbal response, pallor, an immediate urge to lie down and syncope.[1]
Blood pressure readings taken lying down and when upright can be compared to assess for a drop in systolic blood pressure.[1] For example, a blood pressure of 130/85 mm Hg may change to 100/85 mm Hg when the person stands, and does not return to normal.
Explanation[edit | edit source]
According to Blood Pressure Updates, neurally mediated hypotension "is a complication that occurs due to unnatural reflex action between the brain and heart, though they are structurally normal. Neurally mediated hypotension is also called fainting reflex, or vasodepressor syncope or neurocardiogenic syncope or autonomic dysfunction or vaso-vagal reflex. Syncope is the formal medical term used for fainting." [2]
See also[edit | edit source]
- Orthostatic intolerance (OI)
- Postural orthostatic tachycardia syndrome (POTS)
- Autonomic nervous system
- Dizziness
- Hypotension
- Tilt table test
Learn more[edit | edit source]
References[edit | edit source]
- ↑ 1.0 1.1 1.2 1.3 Bested, Alison C.; Marshall, Lynn M. (December 1, 2015). "Review of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: an evidence-based approach to diagnosis and management by clinicians". Reviews on Environmental Health. 30 (4): 223–249. doi:10.1515/reveh-2015-0026. ISSN 0048-7554.
- ↑ Blood Pressure Updates - Neurally Mediated Hypotension
