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R-R interval is usually regular (may be irregular in the presence of AV
block)
QRS rate is usually increased (may be normal or decreased in the presence
of AV block)
"Sawtooth" configuration of flutter waves
Atrial rate is 250-500/min (usually 300/min)
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Sinue tachycardia
Supraventricular tachycardia
Atrial fibrillation
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