Miscellaneous Disease Flashcards
What are cardiomyopathies
A heterogenous group of diseases associated with electrical and/or mechanical dysfunction of the heart
What is the functional classification
Dilated cardiomyopathy, hypertrophic cardiomyompathy, Restrictive Cardiomyopathy
Dilated cardiomyopathy is characterized by?
Impaired contractility and systolic function
Hypertrophic and restrictive characterized by?
Impaired compliance and diastolic function
Decompensation can cause what
Hypertrophic or restrictive cardiomyopathy to take on features of dilated cardiomyopathy
Hypertrophic cardiomyopathy
group of genetic diseases characterized by hypertrophy as a compensatory mechanism for defects in myocyte contractile aparatus
Restrictive cardiomyopathy
The prototype is amyloidosis. Fibrosis (due to radiation, sarcoidosis, etc) or hemochromatosis can cause it as well.
Hypertrophic cardiomyopathy is called hypertrophic obstructive cardiomyopathy when:
it features asymmetrical septal hypertrophy and subaortic stenosis
Most common cause of death in young athletes
hypertrophic cardiomyopathy
Male or female predominance in hypertrophic cardiomyopathy
female
Hypertrophic cardiomyopathy is 50% auto dominant and 50% from new mutations
truth
The decreased comliance in hyper cardiomyo causes
increased left ventricular pressure, increased left atrial pressure, increased pulmonary pressure
Microscopy shows what in hypertrophic cardiomyopathy
myocyte disarray, myocyte hypertrophy, interstitial and replacement fibrosis
Complications of hypertrophic cardiomyopathy are
heart failure, infective endocarditis, atrial fib, left atrial mural thrombus, syncope, sudden death
Symptoms of HC
dyspnea, syncope, angina,
Signs of HC
S4 heart sound, crescendo decrescendo murmur at left sternal border
hypertrophic cardiomyopathy is the most common cause of death for athletes under 35
Yeah, Hypertrophic atherosclerosis is the most common cause for athletes over 35
Cardiac Amyloidosis is what kind of cardiomyopathy
Restrictive
Cardiac amyloidosis due to what>
Deposition of abnormal protein in the interstitium of the heart
What the hell is amyloid
Amyloids are fibrillar proteins produced by plasma cells or hepatocytes… Three of the most common are Ig Light chains, Transthyretin, and amyloid A
Senile Amyloidosis
Transthyretin deposits, limited to the heart, present in 25% over 80
Transthyretin amyloidosis is common in who>
African Americans, it is familial and autosomal dominant
Gross pathology of transthyretin amyloidosis
Enlarged, waxy tan heart
Microscopic pathology of transthyretin amyloidosis
Hyaline eosinophilic material. Orange on Congo Red Stain