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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 HR
- Determine Heart Rhythm
- Analyze P waves
- Measure PR interval
- Measure QRS duration
- interpret rhythm
- pretty normal
- 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
- isoel line
- when impulse is going through AV node