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P Mitrale
2
P mitrale [*]
- Classically associated with mitral stenosis
- Duration > 0.12 s
- Bifid contour
- Peak-to-peak duration > 0.04 s
Normal P waves
- Less than 0.25 mv (2.5 small squares) high
- Less than 0.12 s (3 small squares) duration
- Normally upright in leads I and II
- Inverted in lead aVR
- Best seen in leads II and V1
Negative P wave in lead I
- Transposition of right and left arm electrodes
- Dextrocardia
- Abnormal atrial rhythm
