Management of Ventricular Tachycardia

Introduction to Ventricular Tachycardia Management

The American Heart Association recommends that administering AV nodal blocking agents like verapamil, diltiazem, or beta blockers to ventricular tachycardia can cause hemodynamic collapse, ventricular fibrillation, and death, with a high mortality risk 1

The American College of Cardiology suggests recording a 12-lead ECG immediately to differentiate the mechanism of wide-complex tachycardia, which is non-negotiable 3, 1
If the diagnosis is uncertain, the American Heart Association recommends treating as ventricular tachycardia until proven otherwise, as this is the safest approach 1

Adenosine can be diagnostic and therapeutic for wide-complex tachycardias of uncertain etiology, as it will terminate supraventricular tachycardia but not ventricular tachycardia, helping establish the diagnosis, according to the American College of Cardiology 3, 1
For hemodynamically unstable patients, the American Heart Association indicates that immediate synchronized cardioversion is the safest intervention, regardless of whether the rhythm is ventricular tachycardia or supraventricular tachycardia 3, 4
For hemodynamically stable patients, adenosine is recommended as first-line pharmacological therapy for regular wide-complex tachycardia of unknown mechanism, as it is safe in both ventricular tachycardia and supraventricular tachycardia, according to the American College of Cardiology 3, 1

Procainamide or amiodarone are safer alternatives if adenosine fails and ventricular tachycardia cannot be excluded, as these agents work for both ventricular tachycardia and certain supraventricular tachycardias without the catastrophic risks of calcium channel blockers, according to the American Heart Association 2, 1

Pre-excited atrial fibrillation can mimic ventricular tachycardia and is equally dangerous when treated with AV nodal blockers, as these agents can paradoxically accelerate ventricular rate by shortening the accessory pathway refractory period, according to the American College of Cardiology 2, 1
Right bundle branch block configuration does not exclude ventricular tachycardia, with approximately 25% of ventricular tachycardia in patients with tetralogy of Fallot repair showing right bundle branch block morphology 5
Automatic ECG interpretation systems are unreliable for distinguishing ventricular tachycardia from supraventricular tachycardia and should never be trusted for treatment decisions, according to the Journal of the American College of Cardiology 6