Pathology of Valvular Heart Disease Flashcards

1
Q

What population is most at risk for acute rheumatic fever?

A

Children 5-15yo

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2
Q

What clinical symptoms are associated with acute rheumatic fever?

A

STREP - Syndenham’s chorea, transitory migratory arthritis, rheumatic subcutaneous nodules, erythema marginatum, pancarditis

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3
Q

What are Janeway lesions?

A

Associated with infective endocarditis, non-tender lesions of the soles and palms from microemboli

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4
Q

What population is most affected by mitral valve prolapse?

A

Young women, 20-40yo

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5
Q

What pathogen is most associated with infective endocarditis in patients with a prosthetic heart valve?

A

Staph epidermidis

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6
Q

True/False. Aschoff bodies are present in chronic rheumatic fever.

A

False - they are rarely seen in chronic rheumatic fever. Increased vascularity and lymphocytic infiltrates are commonly present.

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7
Q

What pathogen is most associated with subacute endocarditis?

A

Strep viridans

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8
Q

Fish-mouth deformity describes the gross appearance of what valve pathology?

A

Chronic rheumatic fever - due to fibrous thickening of the valve leaflets

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9
Q

True/False. Nonbacterial thrombotic endocarditis does not elicit an inflammatory response.

A

True - only thrombi are present

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10
Q

Acute rheumatic carditis involves all layers of the heart. What histologic findings are present?

A

Aschoff bodies - fibrinoid necrosis surrounded by monocytes

Anitschkow cells - histiocytes with vesicular nuclei located within Aschoff bodies

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11
Q

What is the most common valvular abnormality?

A

Acquired aortic stenosis

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12
Q

What type of murmur presents in calcific aortic stenosis?

A

High-pitched systolic murmur

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13
Q

Marfan’s syndrome is most associated with what valvular disorder?

A

Mitral valve prolapse

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14
Q

These are tender subcutaneous nodules in the pulp of digits associated with infectious endocarditis.

A

Osler nodes

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15
Q

True/False. If a patient is unable to take an anticoagulant, a bioprosthetic valve replacement is a better choice.

A

True - this is compared to use of a mechanical valve which is likely to cause hemolysis

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16
Q

This type of endocarditis is characterized by pink, warty vegetations of the mitral and tricuspid valves.

A

Libman-Sacks Endocarditis (Endocarditis of SLE)

17
Q

What pathogen is most associated with infective endocarditis in IV drug users?

A

Staph aureus, staph epidermidis

18
Q

What are MacCallum plaques?

A

Subendocardial lesions in the left atrium due to valve necrosis associated with rheumatic fever

19
Q

What is the histologic appearance of acute endocarditis?

A

Acute inflammatory infiltrated with abundant neutrophils

20
Q

This heart pathology commonly involves the aortic valve and is associated with mucin-secreting adenocarcinomas that create a hypercoaguable state.

A

Nonbacterial thrombotic endocarditis

21
Q

Endocardial plaque-like thickenings are found in patients with carcinoid syndrome. What causes this?

A

Carcinoid syndrome is due to a carcinoid tumor releasing serotonin, histamine, bradykinin, and other proteins. These cause plaque-like changes in the heart

22
Q

What population is most at risk for chronic rheumatic fever?

A

Women

23
Q

In what population is mitral annular calcification most common?

A

Women 60+yo with mitral valve prolapse

24
Q

A midsystolic click is characteristic of what valvular disorder?

A

Mitral valve prolapse

25
Q

Rheumatic fever follows infection with what pathogen?

A

Strep A pharyngitis

26
Q

What is the most common congenital cardiovascular malformation?

A

Bicuspid aortic valve

27
Q

These are physical findings caused by microemboli in patients with infective endocarditis.

A

Janeway lesions, Osler nodes, Roth spots

28
Q

What valvular disease is a complication of rheumatic fever?

A

Mitral stenosis

29
Q

What valve is commonly implicated in infective endocarditis of a patient with a history of IV drug use?

A

Tricuspid valve - first valve of the heart

30
Q

Carcinoids of the GI tract generally do not cause heart lesions. Why is this?

A

The liver metabolizes many of the molecules released from the tumor preventing them from reaching the heart

31
Q

This valvular disorder is characterized by calcium deposits in the fibrous ring of the mitral valve.

A

Mitral annular calcification

32
Q

What is the pathophysiology of mitral valve prolapse in Marfan’s patients?

A

Mutations in fibrillin-1, which alters cell-matrix interactions and dysregulates TGF-B signaling

33
Q

The right side of the heart is more susceptible to lesions due to carcinoid syndrome. Why is this?

A

Monoamine oxidase in the lungs neutralized many of the molecules secreted by the tumor thus protecting the left side of the heart

34
Q

What are Ruth Spots?

A

Associated with infective endocarditis, they are splinter hemorrhages in the nail beds due to microemboli

35
Q

True/False. In rheumatic fever, strep pyogenes attack proteins in the heart, joints, and other tissues.

A

False. Rheumatic fever is an autoimmune response. Antibodies against strep pyogenes react with glycoproteins to cause inflammation and damage.