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Small Animal Internal Medicine > Hyperthyroidism > Flashcards

Hyperthyroidism Flashcards

1
Q

Hyperthyroidism is the unregulated production of what?

A

T4

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2
Q

What are the risk factors associated with hyperthyroidism in the cat?

A
  1. Canned food
  2. Age
  3. Cat litter
  4. Indoor housing
  5. Lawn and flea control products

LIKELY MULTI-FACTORIAL

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3
Q

What is the typical signalment of a cat with hyperthyroidism?

A
  1. Older than 8 years of age
  2. Mean age of 13 years
  3. Male (increased risk)
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4
Q

Which 2 breeds may have a DECREASED risk of developing hyperthyroidism?

A
  1. Siamese

2. Himalayan

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5
Q

What are the clinical features of hyperthyroidism in a cat?

A
  1. Weight loss
  2. Polyphagia
  3. Vomiting
  4. PU/PD
  5. Hyperactivity
  6. Skin changes
  7. Panting
  8. Behavioral changes
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6
Q

What is the biggest rule out, next to hyperthyroidism, when you have a PU/PD cat losing weight?

A

Diabetes mellitus

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7
Q

What is the MOST COMMON clinical feature associated with hyperthyroidism in the cat?

A

Weight loss

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8
Q

There is a palpable thyroid in ___% of cats with hyperthyroidism.

A

91%

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9
Q

Which of the following is/are not cardiovascular effects associated with hyperthyroidism in the cat: (1) systolic murmur, (2) bradycardia, (3) gallop rhythm, (4) changes consistent with DCM.

A
  1. Bradycardia

2. Changes consistent with DCM

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10
Q

What 4 cardiovascular changes would you associate with hyperthyroidism?

A
  1. Tachycardia
  2. Systolic murmur
  3. Gallop rhythm
  4. Changes consistent with HCM
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11
Q

What type of changes would you see on a CBC with hyperthyroidism?

A
  1. Increased PCV
  2. Increased hemoglobin
  3. Increased RBC count
  4. Stress leukogram (lymphopenia, eosinopenia, leukocytosis)
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12
Q

What 3 changes might you see on a biochem associated with hyperthyroidism?

A
  1. Elevated ALT and/or ALP
  2. Azotemia
  3. Increased glucose
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13
Q

What change might you notice on a urinalysis associated with hyperthyroidism?

A

Specific gravity > 1.035

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14
Q

What type of changes might you see on ECG associated with hyperthyroidism?

A
  1. Tachycardia
  2. Increased R wave amplitude
  3. Widened QRS complex
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15
Q

What change in the heart might you notice on radiograph?

A

Cardiomegaly

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16
Q

True or False: A high TT4 indicates hyperthyroidism.

A

TRUE

17
Q

___% of cats with hyperthyroidism have a high TT4.

A

90%

18
Q

Which is more consistently elevated in hyperthyroid cats, TT4 or fT4ED?

A

fT4ED

19
Q

Which the preferred screening test for hyperthyroidism, TT4 or fT4ED?

A

TT4

Small Animal Internal Medicine (36 decks)

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