Cardiomyopathies Flashcards Preview

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Flashcards in Cardiomyopathies Deck (17):
1

What is the most common cardiomyopathy?

Dilated cardiomyopathy

2

What is dilated cardiomyopathy?

Expansion of all 4 chambers of the heart

3

What kind of heart dysfunction arises from dilated cardiomyopathy?

Systolic dysfunction

4

Dilated cardiomyopathy leads to what condition?

Biventricular CHF

5

What complications arise from dilated cardiomyopathy?

  • Mitral and tricuspid valve regurgitation 
  • Arrhythmia 

6

What are the etiologies of dilated cardiomyopathy?

  • Unknown (most common)
  • Genetic mutation
  • Myocarditis
    • Usually due to Coxsackie B
  • Alcohol abuse
  • Drugs
  • Pregnancy 

7

S/S of dilated cardiomyopathy?

  • S3
  • Dilated heart on ultrasound
  • Balloon appearance on x-ray

8

Tx for dilated cardiomyopathy?

Heart transplant

9

What kind of hypertrophy is dilated cardiomyopathy?

Eccentric hypertrophy

10

What is hypertrophic cardiomyopathy?

Massive hypertrophy of the left ventricle.

11

What is the most commong cause of  hypertrophic cardiomyopathy?

Genetic mutations in sarcomere proteins.

12

What are the clinical findings of hypertrophic cardiomyopathy?

  • Decreased CO
    • LV hypertrophy leads to diastolic dysfunction
  • Sudden death due to ventricular arrhythmias
    • hypertrophic cardiomyopathy is a common cause of sudden death in young athletes
  • Syncope wtih exercise
    • subaortic hypertrophy of the ventricular septum results in functional aortic stenosis

13

What kind of hypertrophy causes hypertrophic cardiomyopathy?

Concentric hypertrophy (sarcomeres added in parallel)

14

What is restrictive cardiomyopathy?

Decreased compliance of the ventricular endomyocardium that restricts filling during diastole

15

What are the causes of restrictive cardiomyopathy?

  • Amyloidosis
  • Sarcoidosis
  • Hemochromatosis
  • Endocardial fibroelastosis
  • Loeffler syndrome
  •  

16

What are the clnical presentations of restrictive cardiomyopathy?

  • Heart failure
  • Classic finding = low voltage EKG with diminished QRS complex

17

What kind of dysfunction does restrictive cardiomyopathy lead to?

Diastolic dysfunction