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leva [86]
3 years ago
6

5. Which one of the following steps comes first during the investigation of an

Biology
1 answer:
nlexa [21]3 years ago
8 0
can u list the options??
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  • The PQRST waves are used to represent the atrial and ventricular depolarization and repolarization.  These waves are reflected in ECG.  
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