23 - Sudden Cardiac Death Flashcards
definition of sudden cardiac death
sudden unexpected death from cardiac causes w/in 1 hr of onset of symptoms
primary vs secondary VF and why do we care
primary - no assoc MI, secondary - assoc MI
primary has much higher risk of SCD recurrence
what treatment option is recommended for pts w/ primary VF?
AICD - automatic implantable cardioverter defib
MCC sudden cardiac death?
Vfib
difference between VTac and accelerated idioventricular rhythm (AIVR)?
rate - VT >110/min, AIVR <110/min
VT kills, AIVR doesnt
causes of sudden cardiac death
tachy arrythmias (VF!!, VTAC, ventricular flutter brady arrythmias (asystole, bradycardia)
usual cause of systole
sustained myocardial anoxia 2/2 VF - usually not primary cause of death
triggers for SCD
PVC w/ R-on-T
coronary reperfusion
CNS stimulation - symp and vagal activity
psychological stress
how can you prevent VF pos-MI?
beta blockers - stop sympathetic stimulation from causing it
MC etiology of SCD
CAD
which of the following is MCC of prolonged QT?
low K, low Ca, low Mg, low Na
low K
MC etiology of SCD in 15-35 yo adults
IHSS - idiopathic hypertrophic subaortic stenosis
which valvular abnormality is most likely to cause SCD? mitral stenosis aortic stenosis aortic regurg mitral regurg
aortic stenosis
which cardiomyopathy is most likely to cause SCD?
congestive
