Nonconducted PACs or Sinus arrhythmia

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It looks like there are dropped PACs that follow the complexes 1 - 5.  If you compare the T waves in complexes 1 - 5 with complexes 6 - 10, you can see that the T waves are flatter.   The T wave of the 5th complex looks split suggesting that there might be a dropped P wave. 

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