Orthostatic hypotension
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In medicine, orthostatic hypotension is "a significant drop in blood pressure after assuming a standing position. Orthostatic hypotension is a finding, and defined as a 20-mm hg decrease in systolic pressure or a 10-mm hg decrease in diastolic pressure 3 minutes after the person has risen from supine to standing. Symptoms generally include dizziness, blurred vision, and syncope."[1]
Causes
Endarterectomy of the internal carotid artery may be a cause.[2][3]
However, orthostasis may be improved by endarterectomy[4] if there is "vasodepressor-type carotid sinus syndrome caused by compression of the carotid baroreceptors by atherosclerotic plaques."[5]
References
- ↑ Anonymous (2024), Orthostatic hypotension (English). Medical Subject Headings. U.S. National Library of Medicine.
- ↑ Nouraei SA, Al-Rawi PG, Sigaudo-Roussel D, Giussani DA, Gaunt ME (April 2005). "Carotid endarterectomy impairs blood pressure homeostasis by reducing the physiologic baroreflex reserve". J. Vasc. Surg. 41 (4): 631–7. DOI:10.1016/j.jvs.2005.01.009. PMID 15874927. Research Blogging.
- ↑ Azuma Y, Imai K, Oda K, Niwa F, Makino M, Oshima F (October 2007). "[Case of baroreflex failure after bilateral revascularization of the cervical carotid artery]" (in Japanese). Rinsho Shinkeigaku 47 (10): 657–61. PMID 18095499. [e]
- ↑ Hirschl M, Kundi M, Blazek G (July 1996). "Five-year follow-up of patients after thromboendarterectomy of the internal carotid artery: Relevance of baroreceptor sensitivity". Stroke 27 (7): 1167–72. PMID 8685922. [e]
- ↑ Akiyama Y, Hashimoto N, Morimoto M (February 1999). "Orthostatic hypotension improved after bilateral carotid endarterectomy--case report". Neurol. Med. Chir. (Tokyo) 39 (2): 153–6. PMID 10193149. [e]