Junctional tachycardia: Difference between revisions
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==Background== | ==Background== | ||
*Rare | |||
*Cardiac impulses originate at the AV junction | |||
**AV node | |||
**Bundle of His | |||
*Also referred to as Junctional Ectopic Tachycardia | |||
* 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|pediatric vital signs]]) | |||
==Clinical Features== | ==Clinical Features== | ||
Revision as of 22:53, 21 December 2020
Background
- Rare
- Cardiac impulses originate at the AV junction
- AV node
- Bundle of His
- Also referred to as Junctional Ectopic Tachycardia
- 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)
Clinical Features
Differential Diagnosis
Narrow-complex tachycardia
- Regular
- AV Node Independent
- Sinus tachycardia
- Atrial tachycardia (uni-focal or multi-focal)
- Atrial fibrillation
- Atrial flutter
- Idiopathic fascicular left ventricular tachycardia
- AV Node Dependent
- AV Node Independent
- Irregular
- Multifocal atrial tachycardia (MAT)
- Sinus tachycardia with frequent PACs, PJCs, PVCs
- Atrial fibrillation
- Atrial flutter with variable conduction
- Digoxin Toxicity