I.E. Duke Criteria Flashcards
What is one of the major criteria for infective endocarditis?
Positive blood culture for infective endocarditis (IE)
Typical microorganisms include viridans streptococci, Streptococcus bovis, or HACEK group.
What defines a positive blood culture for infective endocarditis?
Two separate blood cultures showing typical microorganisms
Microorganisms may include community-acquired Staphylococcus aureus or enterococci in the absence of a primary focus.
What is required for persistently positive blood cultures in infective endocarditis?
Two positive cultures drawn >12 hours apart or all of three or a majority of four separate cultures
The first and last sample should be drawn 1 hour apart.
What constitutes evidence of endocardial involvement in infective endocarditis?
Positive echocardiogram for IE
This includes oscillating intracardiac mass on valve or supporting structures.
What are the echocardiographic findings that indicate infective endocarditis?
Oscillating intracardiac mass, abscess, or new partial dehiscence of prosthetic valve
New valvular regurgitation is also a sign.
What is classified as a minor criterion related to predisposition for infective endocarditis?
Predisposing heart condition or intravenous drug use
What temperature qualifies as a fever in the context of infective endocarditis?
Temperature >38.0°C
List some vascular phenomena that are minor criteria for infective endocarditis.
- Major arterial emboli
- Septic pulmonary infarcts
- Mycotic aneurysm
- Intracranial haemorrhage
- Conjunctival haemorrhages
- Janeway lesions
What are examples of immunologic phenomena associated with infective endocarditis?
- Glomerulonephritis
- Osler’s nodes
- Roth spots
- Rheumatoid factor
What microbiological evidence can be a minor criterion for infective endocarditis?
Positive blood culture that does not meet a major criterion or serological evidence of active infection
The organism must be consistent with IE.
What are the criteria for diagnosing infective endocarditis?
- Two major criteria
- One major and three minor criteria
- Five minor criteria
