Ecclectic Flashcards
4 types of cardiomyopathies
Dilated
Hypertrophic
Stress/Takotsubo
Restrictive
definition of dilated hypertrophy
less than 40% EF in the presence of increased left ventricular end-diastolic volume
difference between dilated & hypertrophic cardiomyopathy
NO HYPERTROPHy IN DILATED CARDIOMYOPATHY!
(DOES HAVE: less than 40% EF and increased left ventricular end-diastolic volume.
pathology: dilated hypertrophy
chamber enlarges (w/o hypertrophy) , the myocardial fibrils overstreatch, and their ability to effectively contract is impaired
progression of dilated hypertrophy
- weakened contractility r/t weakened myocardial fibrils
- decreaed CO b/c can’t effectively eject blood forward which creates backwards pressure
- pulmonary/systemic congestion from backward pressrue
what happens when contractility decreases?
SNS/baro & chemoreceptors/RAAS to compensate
ALL TO PRESERVE CO & TISSUE PERFUSION!
vessel diameter & afterload
vasoconstriction increases afterload
RAAS activation & hemodynamics
RAAS increases preload (augments SV/CO) and afterload but over time, the increased workload leads to a oxygen demand increase
s/s of dilated cardiomyopathy
causes systolic dysfunction so they show s/s of heart failure (pulmonary *& systemic
common EKG w/ dilated left ventricle
LBBB
s/s of hypertrophic cardiomyopathy
SOB
CP
palpitations
syncope
SOB
CP
palpitations
syncope
s/s of hypertrophic cardiomyopathy
definition: hypertrophic cardiomyopathy
hypertrophy limited to the left ventricle only (dilated cardiomypathy can be any chamber) & it isn’t dilated
*leading cause of sudden cardiac death in young adults & causes outflow obstruction
DIASTOLIC DYSFUNCTION
most common reason for sudden cardiac death in young adults
hypertrophic cardiomyopathy
treatment goals for hypertrophic cardiomyopathy 4
improve ventricular filling
optimize SV
reducing obstructions to ventricular ejection
reducing risk of sudden cardiac death
what type of problem is dilated versus hypertrophic cardiomyopathy
dilated = systolic disfunction (HF under 40%) hypertrophic= diastolic. leading cause of sudden cardiac death in young adults
rx for hypertrophic cardiomyopathy
BB & CaChB b/c it will improve diastrolic dysfunction to increase ventricualr filling and optimize SV
rx that decreases ventricular wall tension
CaChB
rx to avoid in hypertrophic cardiomyopathy
anything that increases or decreases afterload
*problem b/c they decrease CO by increasing outflow obstruction
why do you give a BB for hypertrophic cardiomyopathy
b/c it will decrease HR & contractility which will improve her s/s
definition: stress induced cardiomyopathy
non-ischemic cardiomyopathy caused by a suden tempoary dysfunction of hte myocardiou
*possibly r/t ANS and exxcessive release of adrenalin
takotsubo
aka stress induced cardiomyopathy
aka broken heart syndrome
b/c the characteristic bulging of the LV apex w/preserved function of hte base looks like the octopus pot = takotsubo
prognosis of stress induced cardiomyopathy
unique b/c it is sudden, tempoary, and the heart returns to normal function in 2 months
5 treatment priorities for stress induced cardiomyopathy
optimize fluid minimize myocardial oxygen demand decrease afterload prevent complications monitor for dysrhythmias