Certified rhythm analysis technician (CRAT) practice test I

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Correct answers

• The PR interval is greater than 0.20 seconds
• The QRS complex is wider than 0.12 seconds
• It is polymorphic
• There is no organized rhythm — the rhythm represents a cardiac arrest
• There is no electronical activity or a heart rate less than 15 per minute
• The impulse originates in the ventricle and so is wide
• PR intervals that lengthen until a QRS complex is dropped, it has 'groups of beats'
• Consistent PR intervals, but not always conducted. There are more P waves than QRS complexes
• No two PR intervals are the same, the atrial rhythm is regular, the ventricular rhythm is regular but they have nothing to do with each other

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