Talk:Puzzle 2005 12 466 - Answer

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This may seem like a semantic point but referring to the first ECG as being in "sinus rhythm" is incorrect; the P waves have a grossly abnormal axis and therefore we must assume they are coming from a ectopic atrial source, therefore it is an ectopic atrial rhythm, not sinus rhythm.

Thank you for this remark. The ECG indeed shows an ectopic atrial rhythm.--drj 21:06, 23 October 2011 (CEST)