Rare
Cardiac impulses originate at the AV junction
AV node
Bundle of His
Also referred to as<unk>  Ectopic Tachycardia (JET) or Congenital Ectopic Tachycardia (CJET) if present at birth
Rate exceeds the upper limit seen in normal sinus rhythm
In adults, >100 bpm
In pediatric patients it varies by age until age 8 or 9 (see pediatric vital signs)
AV node
Bundle of His
In adults, >100 bpm
In pediatric patients it varies by age until age 8 or 9 (see pediatric vital signs)
Arbitrarily classified by rate<unk>  escape rhythm: 40-60 bpm
Accelerated<unk>  rhythm: 60-100 bpm<unk> : >100 bpm
Junctional tachycardia
Regular
Wide-complex tachycardia
AV Node Independent
Narrow-complex tachycardia
Sinus tachycardia
Third degree AV block
Atrial tachycardia 