Cardiomyopathy Flashcards
Inherited cardiomyopathies tend to be inherited in which pattern?
Autosomal Dominant
What are the two inherited forms of cardiomyopathy?
Hypertrophic obstructive cardiomyopathy
Arrhythmogenic right ventricular dysplasia
How can you prevent sudden cardiac death in primary cardiomyopathies?
implantable cardioverter-defibrillator
What condition is a common cause of sudden death?
Hypertrophic obstructive cardiomyopathy (HOCM)
What causes the pathology in HOCM?
Usually due to a mutation in the gene encoding β-myosin heavy chain protein
HOCM usually causes sudden death in which group?
young athletes
Echo findings in HOCM?
Mitral regurgitation
Systolic Anterior Motion (SAM) of the anterior mitral valve and asymmetric septal hypertrophy
What is the pathophysiology Arrhythmogenic right ventricular dysplasia?
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
What ECG abnormalities would you see in Arrhythmogenic right ventricular dysplasia?
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
Can cardiomyopathies be acquired?
yes
What is the mixed category of cardiomyopathies?
patients will have a genetic predisposition to cardiomyopathy which is then triggered by the secondary proces
Name 4 causes of dilated cardiomyopathy?
alcohol
Coxsackie B virus
wet beri beri
doxorubicin
Name 3 causes of Restrictive cardiomyopathy?
amyloidosis
post-radiotherapy
Loeffler’s endocarditis
When does peripartum cardiomyopathy typically develop?
Typical develops between last month of pregnancy and 5 months post-partum
Periartum cardiomyopathy is common in who?
older women
greater parity
multiple gestations
What is Takotsubo cardiomyopathy?
‘Stress’-induced cardiomyopathy e.g. patient just found out family member dies then develops chest pain and features of heart failure