Normal sinus rhythm is a normal rhythm that originates from the sinus (SA) node. If there are no other abnormalities, the ECG will have a normal P, PR and QRS complex, and the rate will be normal (60-100 bpm).See also: Sinus Rhythms
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This ECG is from a young woman who presented with status epilepticus seizures and an apparent overdose of bupropion, with possible cocaine ingestion. She was intubated and given propofol and benzodiazepines, which terminated the seizures. This was the repeat ECG 8 hours after presentation, just before she arrested.