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Answer - Case of the month (Dec 2011)

438 bytes added, 10:05, 12 December 2011
Created page with "800px '''Q: After the first two complexes the QRS complex changes. What could explain this?''' <div style="padding-left:24px"> A. Axis rotation due to left..."
[[File:E000572.jpg|800px]]

'''Q: After the first two complexes the QRS complex changes. What could explain this?'''

<div style="padding-left:24px">
A. Axis rotation due to left anterior hemiblock

B. Intermittent pre-exitation

C. Sodium channel blocker infusion

D. Intermittent right bundle branch block
</div>

'''Answer:'''
B. Intermittent pre-exitation. See http://en.ecgpedia.org/wiki/Wpw for more information about pre-exitation.

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