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wrote...
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5 days ago
Normal QRS intervals should be

▸ less than 0.12 seconds wide.

▸ less than 0.20 seconds wide.

▸ between 0.12 and 0.20 seconds wide.

▸ alternately narrow and wide.
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EKG Plain and Simple
Edition: 4th
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wrote...
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5 days ago
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less than 0.12 seconds wide.
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wrote...
5 days ago
Good timing, thanks!
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