Lesson 5 Flashcards
wide PVC (QRS)
come from ventricles
PVC
premature firing of ventricular cells
causes ventricles to be unresponsive to next SA impulse
tip to measure QRS
when it comes back to baseline
ventricular pacemaker
20-40bpm
polymorphic VT
stress/exercise
electrolyte imbalance
can lead to v fib
decreased cardiac output
v fib
no cardiac output
people in cardiac arrest usually start with v fib
its a mess
a systole
nothing
flatline
very rarely get patients back from this
dead… dead as hell what shoes she got on?
widow maker
block at the junction of 2 arteries
left descend/circumflex
right coronary artery affects
preload issues stopping right ventricle from pumping
arteriosclerosis
chronic
hardening of vessels causing lumen to narrow
low density lipoprotein
transports cholesterol out to cells
angina pectoris types
exertional
variant
unstable
ventricular conduction
apex conduction causing septal depolarization from the left to the right initially
_________ _______ cause depolarization from the endocardium to the epicardium and from the ____ to the ______
purkinje fibers
apex
valves
absolute refractory period
most of the ventricle is still _________
early part of T wave
depolarized!
relative refractory period
most of the ventricle is still _________
late part of the T wave
repolarized
PVC
premature firing of ventricular cell
what do PVCs cause… resulting in a(n)…
cause the ventricles to be unresponsive to next SA impulse
compensatory pause
R on T phenomenon can cause… resulting in…
depolarizes the relative refractory phase (usually repolarized)
v fib
ventricular escape beat…..
causes a _______ pause
atrial/junctional pacemaker fails so ventricular pacemaker takes over
non compensatory pause after complex
idioventricular rhythm
ventricular pacemakers sets the rate
QRS is wide/uniform in a bizarre form
V tach
fast ventricular beat
how many arteries branch off the aorta
2
right coronary artery feeds…
RA
RV
SA node in half
AV in almost all
