Nonbacterial thrombotic endocarditis

Nonbacterial thrombotic endocarditis
Nonbacterial thrombotic endocarditis
Classification and external resources
DiseasesDB 29250

Marantic endocarditis, also known as non-bacterial thrombotic endocarditis (NBTE), is the deposition of small sterile vegetations on valve leaflets.

The previous term for nonbacterial thrombotic endocarditis (NBTE) was marantic endocarditis, from the Greek marantikos, meaning “wasting away.”[1]

The term "Marantic endocarditis" is still sometimes used to emphasize the association with a wasting state[2] such as cancer.[3]

Contents

Risk factors

Marantic vegetations are often associated with previous rheumatic fever.

Other risk factors include:

Valve predilection

The disease affects the valves with the following predilection:

mitral valve > aortic valve > tricuspid valve > pulmonary valve.

Presentation

Grossly, vegetations form along lines of valve closure and are generally symmetric with a smooth or verrucoid (warty) texture. Histologically, lesions are composed of fibrin[4] (eosinophilic) and platelets but, unlike bacterial etiologies, contain little evidence of PMNs, microorganisms or inflammation.

Diagnosis

Due to the non-invasive nature of NBTE, clinical examination may or may not reveal a new murmur.

An embolic stroke may be the first feature to suggest the diagnosis of NBTE. An echocardiograph may be used to further assess for valvular lesions.

References

  1. ^ "eMedicine - Neurological Sequelae of Infectious Endocarditis : Article by Milind J Kothari". http://www.emedicine.com/neuro/topic264.htm. Retrieved 2008-03-23. 
  2. ^ "Noninfective Endocarditis: Endocarditis: Merck Manual Professional". http://www.merck.com/mmpe/sec07/ch077/ch077c.html#sec07-ch077-ch077b-1476. Retrieved 2008-12-22. 
  3. ^ "Definition: marantic endocarditis from Online Medical Dictionary". http://cancerweb.ncl.ac.uk/cgi-bin/omd?marantic+endocarditis. Retrieved 2008-12-22. 
  4. ^ "nonbacterial thrombotic endocarditis" at Dorland's Medical Dictionary



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