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yusuki yusuki
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9 years ago
Which event causes the QRS wave on an ECG tracing?
a.   atrial depolarization
b.   atrial repolarization
c.   ventricular depolarization
d.   ventricular repolarization

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monosaccharidemonosaccharide
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9 years ago
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yusuki Author
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9 years ago
Great!
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9 years ago
Don't forget to vote as best answer!
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