Dissection (medical)

Aortic dissection
Specialty| Vascular surgery

A dissection is a tear within the wall of a blood vessel, which allows blood to separate the wall layers. Usually, a dissection is an arterial wall dissection, but rarely it may be a vein wall dissection (VWD).[1]

By separating a portion of the wall of the artery (a layer of the tunica intima or tunica media), a dissection creates two lumens or passages within the vessel, the native or true lumen, and the "false lumen" created by the new space within the wall of the artery.

## Contents

* 1 Description
* 2 Types
* 3 References
* 4 External links

## Description

Dissections become threatening to the health of the organism when growth of the false lumen prevents perfusion of the true lumen and the end organs perfused by the true lumen. For example, in an aortic dissection, if the left subclavian artery orifice were distal to the origin of the dissection, then the left subclavian would be said to be perfused by the false lumen, while the left common carotid (and its end organ, the left hemisphere of the brain) if proximal to the dissection, would be perfused by the true lumen proximal to the dissection.

MRI of an aortic dissection
1 Aorta descendens with dissection
2 Aorta isthmus

Vessels and organs that are perfused from a false lumen may be well-perfused to varying degrees, from normal perfusion to no perfusion. In some cases, little to no end-organ damage or failure may be seen. Similarly, vessels and organs perfused from the true lumen but distal to the dissection may be perfused to varying degrees. In the above example, if the aortic dissection extended from proximal to the left subclavian artery takeoff to the mid descending aorta, the common iliac arteries would be perfused from the true lumen distal to the dissection but would be at risk for malperfusion due to occlusion of the true lumen of the aorta by the false lumen.

## Types

Examples include:

* Aortic dissection (aorta)
* Coronary artery dissection (coronary artery)
* Carotid artery dissection (carotid artery)
* Vertebral artery dissection (vertebral artery)

Carotid and vertebral artery dissection are grouped together as "cervical artery dissection".

## References

1. ↑ "Vein wall dissection: a rare puncture-related complication of brachiocephalic fistula. Gray-scale and color Doppler sonographic findings.". J Clin Ultrasound 33 (9): 464-7. 2005. doi:10.1002/jcu.20171. PMID 16281272. https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16281272.

## External links

Classification|

* ICD-9-CM: 441.0, 443.2
* MeSH: D000784

|

* v
* t
* e

Cardiovascular disease (vessels) (I70–I99, 440–456)

Arteries, arterioles
and capillaries|

| Inflammation|

* Arteritis
* Aortitis
* Buerger's disease

|

Peripheral artery disease|

| Arteriosclerosis|

* Atherosclerosis
* Foam cell
* Fatty streak
* Atheroma
* Intermittent claudication
* Critical limb ischemia

* Monckeberg's arteriosclerosis
* Arteriolosclerosis
* Hyaline
* Hyperplastic
* Cholesterol
* LDL
* Oxycholesterol
* Trans fat

|

Stenosis|

* Carotid artery stenosis
* Renal artery stenosis

Other|

* Aortoiliac occlusive disease
* Degos disease
* Erythromelalgia
* Fibromuscular dysplasia
* Raynaud's phenomenon

Aneurysm / dissection /
pseudoaneurysm|

* torso: Aortic aneurysm
* Abdominal aortic aneurysm
* Thoracic aortic aneurysm
* Aneurysm of sinus of Valsalva
* Aortic dissection
* Aortic rupture
* Coronary artery aneurysm
* head / neck
* Intracranial aneurysm
* Intracranial berry aneurysm
* Carotid artery dissection
* Vertebral artery dissection
* Familial aortic dissection

Vascular malformation|

* Arteriovenous fistula
* Arteriovenous malformation
* Telangiectasia
* Hereditary hemorrhagic telangiectasia

Vascular nevus|

* Cherry hemangioma
* Halo nevus
* Spider angioma

Veins|

| Inflammation|

* Phlebitis

|

Venous thrombosis /
Thrombophlebitis|

* primarily lower limb
* Deep vein thrombosis
* abdomen
* Hepatic veno-occlusive disease
* Budd–Chiari syndrome
* May–Thurner syndrome
* Portal vein thrombosis
* Renal vein thrombosis
* upper limb / torso
* Mondor's disease
* Paget–Schroetter disease
* head
* Cerebral venous sinus thrombosis
* Post-thrombotic syndrome

Varicose veins|

* Gastric varices
* Portacaval anastomosis
* Caput medusae
* Esophageal varices
* Hemorrhoid
* Varicocele

Other|

* Chronic venous insufficiency
* Chronic cerebrospinal venous insufficiency
* Superior vena cava syndrome
* Inferior vena cava syndrome
* Venous ulcer

Arteries or veins|

* Angiopathy
* Macroangiopathy
* Microangiopathy
* Embolism
* Pulmonary embolism
* Cholesterol embolism
* Paradoxical embolism
* Thrombosis
* Vasculitis

Blood pressure|

| Hypertension|

* Hypertensive heart disease
* Hypertensive emergency
* Hypertensive nephropathy
* Essential hypertension
* Secondary hypertension
* Renovascular hypertension
* Benign hypertension
* Pulmonary hypertension
* Systolic hypertension
* White coat hypertension

|

Hypotension|

* Orthostatic hypotension

0.00

(0 votes)

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Medicine:Dissection_(medical)&oldid=868214"
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template