Myocarditis and Pericarditis Flashcards
viral myocarditis causes
coxsackie B/A, parvovirus B19, HIV, HHV-6, adenovirus
Chagas
T. cruzi
acute chagas
chagoma, a subcutaneous inflammatory nodule in the bite site, and histologically numerous parasites are seen in the heart with amastigotes within pseudocysts in myofibers. There is extensive chronic inflammation with lymphocytes, plasma cells, macrophages, and myofiber destruction
chronic chagas
extensive interstitial fibrosis, hypertrophied myofibers, and focal lymphocytic inflammation
The most common cause for a primary myocarditis is
a virus (such as Coxsackie virus)
giant cell myocarditis
heart is flabby and dilated
unknown etiology
young-middle aged pt (3rd-4th decade)
no effective tx avail
pericardial cavity
between parietal and visceral layer
hemoperricardium can lead to
cardiac tamponade
pericarditis can occur post-____
post-MI
Dressler’s - immune-mediated
most cases of pericarditis are presumed to be of which origin?
viral
serous pericarditis
-inflammatory rxn of epicardial and pericardial surfaces
inflamm of epicardial and pericardial surfaces w/ scant inflamm cells
serous pericarditis
constrictive pericarditis
fibrotic, thickened pericardium restricts diastolic filling of heart
causes of constrictive pericarditis
idiopathic
TB
post surgical, radiation, post MI (Dressler’s)
