Arrhythmia Recognition: The Art of Interpretation
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Practice Rhythm Strips

Practice Rhythm Strip 3
Rate:About 80 BPMPR intervals:Normal, consistent
Regularity:RegularQRS width:Normal
P waves:PresentGrouping:None
   Morphology:InvertedDropped Beats:None
   Axis:AbnormalRhythm:Ectopic atrial rhythm
P:QRS ratio:1:1

This rhythm strip is a good example of an ectopic atrial rhythm. The inverted P waves and the normal PR intervals clinch the diagnosis. Should you get a regular 12-lead ECG on this patient? Yes, you should because of the presence of a rhythm abnormality and the ST segment elevation. Remember, it is better to be safe than sorry!

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