3<unk><unk> es in a row is considered ventricular tachycardia
Non-sustained if lasts < 30 seconds
Sustained if lasts >30 seconds
Non-sustained if lasts < 30 seconds
Sustained if lasts >30 seconds
Due to true ventricular tachycardia in 80% of cases
For patients with underlying cardiac disease, increases to > 90%
Consider:
Hyperkalemia
Digoxin toxicity
Severe metabolic acidosis
For patients with underlying cardiac disease, increases to > 90%
Hyperkalemia
Digoxin toxicity
Severe metabolic acidosis
Wide-complex tachycardia
Regular
Narrow-complex tachycardia
AV Node Independent
Junctional tachycardia
Sinus tachycardia
Third degree AV block
Atrial tachycardia 