Infectious Disease > Endocarditis > Flashcards

Endocarditis Flashcards

(57 cards)

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1
Q

Define endocarditis

A

inflammation of the endocardium, the membranes lining the chambers of the heart and covering the cusps of the heart valves

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2
Q

Define infective endocarditis (IE)

A

Infection of the heart valves by various microorganisms

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3
Q

How do you classify endocarditis?

A
  • Based on the anatomical site of infection
  • Based on the clinical presentation
  • Based on the organism identified
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4
Q

What are the types of anatomical sites for endocarditis?

A
  • Native valve
  • Prosthetic valve
  • Left side
  • Right side
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5
Q

What are the clinical presentations for acute bacterial endocarditis?

A
  • High fevers
  • Systemic toxicity
  • Leukocytosis
  • Death within days if left untreated
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6
Q

What are the clinical presentations for subacute bacterial endocarditis (SBE)?

A
  • Slow, low-grade fever
  • Night sweats
  • Weight loss
  • Vague systemic complaints
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7
Q

(T/F) - SBE occurs in previous valvular damage patients

A

TRUE

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8
Q

(T/F) - SBE and acute are treated differently

A

FALSE - treated the same

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9
Q

Which gender is affected by endocarditis more?

A

Men - 2x

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10
Q

Which age-group is affected by endocarditis more?

A

Age > 50 yo

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11
Q

What are the predisposing risk factors of endocarditis?

A
  • Presence of prosthetic heart valve
  • Previous endocarditis
  • DM
  • Health-care related exposure
  • Congenital heart disease with cyanosis
  • Acquired valvular dysfunction
  • Hypertrophic cardiomyopathy
  • Mitral valve prolapse with regurgitation
  • Chronic IV access
  • IV drug abuse (IVDA)
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12
Q

(T/F) - In 25% of the cases, predisposing risk factors are absent

A

TRUE

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13
Q

What are the most common organisms associated with endocarditis?

A
  • Staph
  • Streptococci
  • Enterococci
  • HACEK organisms
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14
Q

What is the most common route of obtaining IE?

A

Hematogenous spread requiring sequential occurrence of several factors

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15
Q

What are the several factors in the sequential occurrence that develops IE?

A
  1. Endothelial surface of the heart is damaged
  2. Sterile platelet-fibrin thrombi form surface of damaged endothelial cells
  3. Bacteremia gives organisms access to and results in colonization of the endothelial surface
  4. After colonization of endothelial surface, a “vegetation” of fibrin, platelets and bacteria form
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16
Q

Which bacterial organisms adhere to endothelial surface due to their production of adherence products?

A
  • Staph
  • Strep
  • Entero
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17
Q

What are secondary complications due to vegetation formation?

A
  • Heart failure
  • Septic emboli
  • Antibody complexes can form and deposit in organs causing local inflammation and damage
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18
Q

(T/F) - Clinical presentation of endocarditis is usually variable and nonspecific

A

TRUE

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19
Q

What is the most common sign and/or Sx of endocarditis?

A
  • Fever

- Heart murmur (sign)

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20
Q

What laboratory finding is the hallmark finding for endocarditis?

A

Positive blood cultures

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21
Q

What are nonspecific lab findings for endocarditis?

A
  • Anemia
  • Normal or slightly elevated WBC with a mild left shift
  • Elevated erythrocyte sedimentation rate (ESR) or C-reactive protein (CRP)
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22
Q

Which diagnostic tests can be performed to confirm endocarditis?

A
  • Transesophageal echocardiogram (TEE) [used more often]

- Transthoracic echocardiogram (TTE)

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23
Q

What are the peripheral manifestations that could occur due to endocarditis?

Study These Flashcards
A
  • Osler’s nodes
  • Janeway lesions
  • Splinter hemorrhages
  • Petechiae
  • Clubbing of the fingers
  • Roth spot’s
24
Q

Match the peripheral manifestation from the description below:
Small, erythematous, hemorrhagic lesions, painless

25
Match the peripheral manifestation from the description below: Hemorrhagic, painless plaques on the palms of the hands or soles of the feet
Janeway lesions
26
Match the peripheral manifestation from the description below: Proliferative changes in the soft tissue about the terminal phalanges observed in long standing endocarditis
Clubbing of the fingers
27
Match the peripheral manifestation from the description below: Purplish, erythematous SQ papules or nodules on the pads of the fingers and toes; painful and tender
Osler's nodes
28
Match the peripheral manifestation from the description below: Retinal infarct with central pallor and surrounding hemorrhage
Roth's spots
29
Match the peripheral manifestation from the description below: Thin, linear hemorrhages found under the nail beds of fingers or toes
Splinter hemorrhages
30
Which peripheral manifestations are not specific for infective endocarditis?
- Osler's nodes | - Splinter hemorrhages
31
What criteria is used to diagnose a major or minor criteria?
Modified Duke
32
What things would consider a patient to be under a major criteria?
- Positive blood culture test (separate 2 times) | - Evidence of endocardial involvement with diagnostic tests
33
What is considered definite IE?
Pt consist of - 2 major criteria OR - 1 major and 3 minor criteria OR - 5 minor criteria
34
What is considered possible IE?
Pt consist of - 1 major and 1 minor criteria OR - 3 minor criteria
35
A patient who is susceptible to PCN and has streptococci endocarditis in their native valve would be given what treatment? For how long?
- Aqueous crystalline PCN G or ceftriaxone for 4 weeks - Aqueous crystalline PCN G or ceftriaxone + gentamycin for 2 weeks - Vancomycin for 4 weeks
36
(T/F) - Vancomycin is only given if patient cannot tolerate PCN or ceftriaxone
TRUE
37
A patient who is relative resistant to PCN and has group A streptococci endocarditis in their native valve would be given what treatment? For how long?
- Aqueous crystallin PCN G or ceftriaxone for 4 weeks with gentamycin for 2 weeks - Vancomycin for 4 weeks
38
A patient who is resistant to PCN and has group A streptococci endocarditis in their native valve would be given what treatment? For how long?
Vancomycin + gentamycin for 6 weeks
39
A patient who is susceptible to PCN and has group A streptococci endocarditis in their prosthetic valve would be given what treatment? For how long?
- Aqueous crystalline PCN G or ceftriaxone for 6 weeks +/- gentamicin (clinician's choice) for 2 weeks - Vancomycin for 6 weeks
40
A patient who is relative or fully resistant to PCN and has group A streptococci endocarditis in their prosthetic valve would be given what treatment? For how long?
- Aqueous crystalline PCN G or ceftriaxone + gentamicin for 6 weeks - Vancomycin for 6 weeks
41
A patient with an MSSA infection and has staphylococcal endocarditis in their native valve would be given what treatment? For how long?
- Oxacillin or nafcillin for 6 weeks | - Cefazolin for 6 weeks (if patient is allergic to PCN)
42
A patient with an MRSA infection and has staphylococcal endocarditis in their native valve would be given what treatment? For how long?
- Vancomycin for 6 weeks | - Daptomycin for 6 weeks
43
A patient with an MSSA infection and has staphylococcal endocarditis in their prosthetic valve would be given what treatment? For how long?
- Nafcillin or oxacillin for 6 weeks or more AND - Rifampin for 6 weeks or more AND - Gentamicin for 2 weeks
44
A patient with an MRSA infection and has staphylococcal endocarditis in their prosthetic valve would be given what treatment? For how long?
- Vancomycin for 6 weeks or more AND - Rifampin for 6 weeks or more AND - Gentamicin for 2 weeks
45
A patient susceptible to PCN, gentamicin, vancomycin and has enterococcal endocarditis in their prosthetic or native valve would be given what treatment? For how long?
- Ampicillin or aqueous PCN G + gentamicin for 4-6 weeks - Ampicillin or ceftriaxone for 6 weeks - Vancomycin + gentamicin for 6 weeks
46
Which regimen is only given if the CrCl baseline < 50 mL/min or decreases < 50 with a gentamicin-containing regimen?
Ampicillin or ceftriaxone for 6 weeks if a patient has enterococcal endocarditis and are susceptible to PCN, gentamicin, and vancomycin.
47
A patient susceptible to PCN but resistant to aminoglycosides and has enterococcal endocarditis in their prosthetic or native valve would be given what treatment? For how long?
Ampicillin or ceftriaxone for 6 weeks
48
A patient susceptible to vancomycin and aminoglycosides but resistant to PCN and has enterococcal endocarditis in their prosthetic or native valve would be given what treatment? For how long?
Vancomycin + gentamicin for 6 weeks
49
A patient resistant to PCN, vancomycin, aminoglycosides and has enterococcal endocarditis in their prosthetic or native valve would be given what treatment? For how long?
Linezolid or daptomycin for > 6 weeks
50
A patient with HACEK endocarditis in their prosthetic or native valve would be given what treatment? For how long?
-Ceftriaxone - Ampicillin/sulbactam - Ciprofloxacin If it's a native valve infection it's for 4 weeks long If it's a prosthetic valve infection it's for 6 weeks long
51
(T/F) - HACEK endocarditis can be given another 3rd or 4th cephalosporin instead of ceftriaxone
TRUE
52
(T/F) - Ciprofloxacin is a fluoroquinolone that can be given for HACEK endocarditis as an alternative for beta-lactam intolerance
TRUE - but other fluoroquinolones can be given as well
53
Can surgery be used to help treat endocarditis in a patient?
Yes
54
Which patients are indicated to have surgery for endocarditis?
- HF - Persistent fever - Recurrent embolic events - Prosthetic valves - Abscess - Fungal IE - Ineffective antibiotic therapy
55
What is done in surgery to help reduce/treat endocarditis?
Remove and replace valve(s) to remove infected tissue and restore hemodynamic function
56
Are there any prevention therapy for patients to reduce recurrent endocarditis events?
Yes
57
Who are high risk patients who are allowed to have prevention therapies?
- Prosthetic heart valve - Previous IE - Congenital heart disease (CHD) - Cardiac transplant recipient who develops cardiac valvulopathy
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