Hypertension

From Libre Pathology
Revision as of 04:01, 26 October 2010 by Michael (talk | contribs) (→‎Brain)
Jump to navigation Jump to search

Hypertension is very common and affects multiple organs. Clinically, it is usually classified as primary (idiopathic) and secondary.

Hypertensive crisis, if untreated, is associated with damage to the brain, heart, eye and kidneys.[1]

Pulmonary hypertension is dealt with separately in the article pulmonary hypertension.

Brain

Charcôt-Bouchard aneurysms

General

Microscopic

Features:[4]

  • Small aneurysms (~300 micrometers) with a fusiform shape.
  • Vessel wall changes:
    • Early:
      • Proliferation of arteriolar smooth muscle
    • Late:
      • Apoptotic smooth muscle cell death and collagen deposition.

Image: C-B aneurysm (ucsf.edu).

Lacunar infarcts

General

  • Common.
  • May be located in the putamen.[5]

Hypertension and the eye[6]

  • Hypertensive retinopathy.
  • Aneurysms.
  • Branch retinal vein occlusion (BRVO).
  • Vitreous hemorrhage.

Hypertensive heart disease

General

  • Treated with antihypertensives.
  • Mechanism of death: (ventricular) arrhythmia.[7]

Associated pathology[7]

  • Left atrial enlargement and atrial fibrillation.

Gross

Features:[8]

  • Left ventricular hypertrophy (concentric).

Notes:

  • In the autopsy context, significant valvular heart disease should be absent.
  • A heart > ~400 g is considered good enough for the cause of death hypertensive heart disease, if no other significant findings are present.[9]

Gross DDx:

  • Hypertrophic cardiomyopathy.

Microscopic

Features:[8]

  • Arteriolosclerosis of intramural coronary arteries and arterioles.
    • Fibrosis of media.
  • Peirarteriolar fibrosis.

Kidney

General

  • May result in renal failure.

Microscopic

Features:[10]

  • Fibrinoid necrosis of afferent and interlobular arteries (due to endothelial cell damage).

Notes:

See also

References

  1. Janota T (2009). "[Hypertensive crisis--the present view]" (in Czech). Cas. Lek. Cesk. 148 (8): 370–3. PMID 19899722.
  2. Kojima H, Eguchi H, Mizutani T, Tanaka K, Kikuchi Y, Fukudome N (2007). "Three-dimensional analysis of pathological characteristics of a microaneurysm". Clin. Neuropathol. 26 (2): 74–9. PMID 17416106.
  3. URL: http://missinglink.ucsf.edu/lm/introductionneuropathology/Response%20_to_Injury/Microvascular.html. Accessed on: 24 September 2010.
  4. Auer RN, Sutherland GR (December 2005). "Primary intracerebral hemorrhage: pathophysiology". Can J Neurol Sci 32 Suppl 2: S3–12. PMID 16450803.
  5. URL: http://moon.ouhsc.edu/kfung/jty1/neurotest/Q04-Ans.htm. Accessed on: 26 October 2010.
  6. URL: http://health.indiamart.com/eye-care/hypertension-and-eye.html. Accessed on: 23 September 2010.
  7. 7.0 7.1 Prisant LM (April 2005). "Hypertensive heart disease". J Clin Hypertens (Greenwich) 7 (4): 231–8. PMID 15860963.
  8. 8.0 8.1 Schwartzkopff B, Strauer BE (2000). "Coronary reserve and arteriolosclerosis in hypertensive heart disease". Z Kardiol 89 Suppl 9: IX/132–5. PMID 11151783.
  9. MSP. 29 September 2010.
  10. Ono H, Ono Y (November 1997). "Nephrosclerosis and hypertension". Med. Clin. North Am. 81 (6): 1273–88. PMID 9356598.

External links