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Question 1 of 1
1. Question
Match the following ECGs with the correct diagnosis:
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Atrial flutter with variable block
Multifocal atrial tachycardia
Atrial Fibrillation
Condition A
Condition B
Condition C
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Incorrect
Atrial flutter8 is identified by the presence of:
Loss of isoelectric line
Regular atrial activity ~300 beats/minute
Saw-tooth pattern of inverted flutter waves (II, III, aVF)
Upright flutter waves in V1 (these may be mistaken for P waves)
In atrial flutter with a fixed AV conduction ratio, the ventricular rate is a fraction of the atrial rate, for example in a 3:1 blockĀ the ventricular rate would be ~100bpm (1/3 of atrial rate ~300bpm).
Atrial flutter with a variable AV conduction ratio, there may be alternating 2:1, 3:1 and 4:1 ratios, creating an irregular ventricular response which mimics atrial fibrillation.
Multifocal atrial tachycardia9 is identified by the presence of:
HR >150 beats/minute (can be as high as 250bpm, usually ~100-150bpm)
Irregularly irregular rhythm
Varying PP/PR/RR intervals
3 different P wave morphologies in same lead
No flutter waves
Atrial fibrillation10 is identified by the presence of: