Nonbacterial thrombotic endocarditis

Nonbacterial thrombotic endocarditis (NBTE) is a form of endocarditis in which small sterile vegetations are deposited on the valve leaflets. Formerly known as marantic endocarditis, which comes 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]

"NBTE" redirects here. For educational board, see National Board for Technical Education.
Nonbacterial thrombotic endocarditis
SpecialtyCardiology 

Risk factors

Marantic vegetations are often associated with previous rheumatic fever.Other risk factors include:

Valve predilection

The disease affects the valves with following predilection: mitral valve > aortic valve > tricuspid valve > pulmonary valve [4]

Histopathology

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[5] (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 diagnosis of NBTE. An echocardiograph may be used to further assess for valvular lesions.

References
  1. Neurological Sequelae of Infectious Endocarditis at eMedicine
  2. "Noninfective Endocarditis: Endocarditis: Merck Manual Professional". Retrieved 2008-12-22.
  3. "Marantic endocarditis". Online Medical Dictionary. Retrieved 2008-12-22.
  4. "UpToDate".
  5. "nonbacterial thrombotic endocarditis" at Dorland's Medical Dictionary
Classification
External resources
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