410 exam 2 material Flashcards
2nd Degree av block
sometimes signal doesn’t get through. will see p waves w noting after it. ventricular rhythm will be off
3rd degree av block
sa node sends signals that never gets to ventricles
- would hope av node takes over
- if not ventricles take over as pace maker
- slow hr if ventricle is acting as pace maker
1st degree Atrio-ventricular Blocks
long pr internal but signal always gets through
v4-v6
positive electrodes, rt side up on lt side of heart
- all should be tall and narrow
v1-v3
comes from rt side of heart
Heart rate
convert R-R intervals to HR
ST Segment depression- sign of ischemia
Normal sinus rhythm
uniform shape of waves, consistent R-R intervals and pR intervals
beginning of qrs complex
Premature atrial contraction (PAC)
atria contracted earlier than normal out of established rhythm (early p wave may have different shape but qrs and usually appear normal)
Premature Ventricular Contraction (PVC)
cells in ventricles depolarize early, before ventricles can properly re fill w blood
No p wave
makes qrs wider
electricity started from ventricular cell
Possible causes of PVC
Caffiene,
medications,
nerves
stress
Unifocal
1 abnormal area in ventricle that creates issues
Multifocal
multiple abnormal areas in ventricle that creates issues
couplet
2 pvc’s back to back
can sometimes have 3 back to back
atrial flutter
rapidly pumping
usually leads to a fib
QRS still good
atrial fib
rapidly shaking- very high amount of electrical activity
- high risk for clotting bc bl isn’t moving
- can’t see p wave
- qrs should still be tall and narrow
- rhythm off
