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# RHYTHM Does each QAS complex have a preceding P wave, yes, sinus - >*100* HR: Sinus Tachycardia - *≤60* HR: Sinus Bradycardia - Any irregular rate: Sinus Arrhythmia # Other Rhythms - Atrial fibrillation - Atrial flutter - premature atrial contraction - premature ventricular contraction # AS I...

# RHYTHM Does each QAS complex have a preceding P wave, yes, sinus - >*100* HR: Sinus Tachycardia - *≤60* HR: Sinus Bradycardia - Any irregular rate: Sinus Arrhythmia # Other Rhythms - Atrial fibrillation - Atrial flutter - premature atrial contraction - premature ventricular contraction # AS INTERVALS - PR Interval: 0.12 to 0.20 seconds - QS Duration: 0.07 to 0.10 seconds - QT Interval: - normal ≤0.44 sec - males ≤0.45-0.46 sec - females ≤0.47-≤0.48 sec