Cardiomyopathy Flashcards

1
Q

Inherited cardiomyopathies tend to be inherited in which pattern?

A

Autosomal Dominant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the two inherited forms of cardiomyopathy?

A

Hypertrophic obstructive cardiomyopathy

Arrhythmogenic right ventricular dysplasia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How can you prevent sudden cardiac death in primary cardiomyopathies?

A

implantable cardioverter-defibrillator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What condition is a common cause of sudden death?

A

Hypertrophic obstructive cardiomyopathy (HOCM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What causes the pathology in HOCM?

A

Usually due to a mutation in the gene encoding β-myosin heavy chain protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

HOCM usually causes sudden death in which group?

A

young athletes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Echo findings in HOCM?

A

Mitral regurgitation

Systolic Anterior Motion (SAM) of the anterior mitral valve and asymmetric septal hypertrophy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the pathophysiology Arrhythmogenic right ventricular dysplasia?

A

Right ventricular myocardium is replaced by fatty and fibrofatty tissue

Around 50% of patients have a mutation of one of the several genes which encode components of desmosome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What ECG abnormalities would you see in Arrhythmogenic right ventricular dysplasia?

A

ECG abnormalities in V1-3, typically T wave inversion.

An epsilon wave is found in about 50% of those with ARV - this is best described as a terminal notch in the QRS complex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Can cardiomyopathies be acquired?

A

yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the mixed category of cardiomyopathies?

A

patients will have a genetic predisposition to cardiomyopathy which is then triggered by the secondary proces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Name 4 causes of dilated cardiomyopathy?

A

alcohol
Coxsackie B virus
wet beri beri
doxorubicin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Name 3 causes of Restrictive cardiomyopathy?

A

amyloidosis
post-radiotherapy
Loeffler’s endocarditis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When does peripartum cardiomyopathy typically develop?

A

Typical develops between last month of pregnancy and 5 months post-partum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Periartum cardiomyopathy is common in who?

A

older women
greater parity
multiple gestations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is Takotsubo cardiomyopathy?

A

‘Stress’-induced cardiomyopathy e.g. patient just found out family member dies then develops chest pain and features of heart failure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How do you treat Takotsubo cardiomyopathy?

A

Treatment is supportive

18
Q

What happens to the myocardium in Takotsubo cardiomyopathy?

A

Transient, apical ballooning of the myocardium

19
Q

What are secondary cardiomyopathies?

A

pathological myocardial involvement as part of a generalized systemic disorder

20
Q

What are Infective secondary cardiomyopathies typicall caused by?

A

Coxsackie B virus

Chagas disease

21
Q

What are Infiltrative secondary cardiomyopathies typicall caused by?

A

Amyloidosis

22
Q

What are Storage secondary cardiomyopathies typicall caused by?

A

Haemochromatosis

23
Q

What are Toxicity secondary cardiomyopathies typicall caused by?

A

Doxorubicin

Alcoholic cardiomyopathy

24
Q

What are Inflammatory (granulomatous) secondary cardiomyopathies typicall caused by?

A

Sarcoidosis

25
Q

What are Endocrine secondary cardiomyopathies typicall caused by?

A

Diabetes mellitus
Thyrotoxicosis
Acromegaly

26
Q

What are Neuromuscular secondary cardiomyopathies typicall caused by?

A

Friedreich’s ataxia
Duchenne-Becker muscular dystrophy
Myotonic dystrophy

27
Q

What are Nutritional deficiencies secondary cardiomyopathies typicall caused by?

A

Beriberi (thiamine)

28
Q

What are Autoimmune secondary cardiomyopathies typicall caused by?

A

Systemic lupus erythematosis

29
Q

What is the most common form of cardiomyopathy?

A

Dilated cardiomyopathy (DCM) is the most common form of cardiomyopathy, accounting for 90% of cases.

30
Q

What is the most common cause of dilated cardiomyopathy?

A

idiopathic

31
Q

What are some cardiovascular causes of dilated cardiomyopathy?

A

myocarditis: e.g. Coxsackie B, HIV, diphtheria, Chagas disease
ischaemic heart disease
hypertension

32
Q

What drugs can cause dilated cardiomyopathy?

A

iatrogenic: e.g. doxorubicin

substance abuse: e.g. alcohol, cocaine

33
Q

What nutrional cause of dilated cardiomyopathy?

A

thiamine deficiency, wet beriberi

dry is peripheral neuropahty

34
Q

What role do genetics play indilated cardiomyopathy?

A

either a familial genetic predisposition to DCM or a specific syndrome e.g. Duchenne muscular dystrophy

35
Q

What are some infiltrative causes of dilated cardiomyopathy?

A

haemochromatosis, sarcoidosis

36
Q

What are the three key points in the pathophysiology of dilated cardiomyopathy?

A
  1. dilated heart leading to predominately systolic dysfunction
  2. all 4 chambers are dilated, but the left ventricle more so than right ventricle
  3. eccentric hypertrophy (sarcomeres added in series) is seen
37
Q

What type of murmur would you hear in dilated cardiomyopathy?

A

systolic murmur

This is because stretching of the valves may result in mitral and tricuspid regurgitation

38
Q

What would you see on CXR for dilated cardiomyopathy?

A

‘balloon’ appearance of the heart

39
Q

Would you hear an S3 in dilated cardiomyopathy?

A

yes

40
Q

dilated cardiomyopathy presents with what?

A

classic findings of heart failure

41
Q

What would an echo show in dilated cardiomyopathies?

A

reduction in the LVEF (normal range is 55-70%)

dilated left ventricle and no regional wall motion abnormalities