Card Set Information
cardiac nursing CAD
for exam one
PVC stands for
Premature Ventricular Contraction.
Three or more successive PVCs are called nonsustained ventricular tachycardia.
These can be common
Rapid atrial depolarization
PAC stands for
premature atrial contraction
when atrium fires impulse before the next one comes, and is usually followed by a pause. There are rarely other symptoms associated with this. Can be caused by stress or inflammation
SVT stands for
may be normal
P waves may not be visible
PSVT = intermittent
The most common dysrhthmia
Atrium is depolarized randomly
With AFib, pt is at risk for
Normal QRS Duration
Normal PR interval
Analyzing P waves
Are They present?
DO they occur regularly?
Is there one P wave for each QRS?
Are they smooth, rounded, and upright?
Are they all similar looking?
ECG rhythm analysis
Determine Heart Rhythm
Analyze P waves
Measure PR interval
Measure QRS duration
results from changes in intrathoracic pressure while breathing
PP and RR intervals vary by more than 0.12 seconds
total time for ventricals to depolarize and repolarize
late ventricular repolarization
represents ventricular repolarization
early ventricular repolarization
represents the junction where QRS ends and ST starts
Abnormal Q wave
ventricular septal depolarization
measured from P wave to end of PR segment
normally measures 0.12 to 0.2 seconds
when impulse is going through AV node