Fascicular Ventricular Tachycardia Management

Acute Pharmacologic Management

• The European Society of Cardiology recommends administering intravenous verapamil as the acute treatment of choice for hemodynamically stable patients with fascicular VT, which presents characteristically with right bundle branch block morphology and left axis deviation 1
• Beta-blockers are an alternative acute option if verapamil is contraindicated or unavailable, as recommended by the European Society of Cardiology 1, 2, 3
• For hemodynamically unstable patients, the European Society of Cardiology recommends performing immediate synchronized cardioversion if the patient presents with hypotension, altered mental status, or signs of shock 1, 4

Definitive Management Strategy

• The European Society of Cardiology recommends catheter ablation by experienced operators as first-line treatment for symptomatic patients with idiopathic left fascicular VT, with acute success rates exceeding 90% and recurrence rates of 0-20% 2, 3
• The European Society of Cardiology particularly recommends catheter ablation for young patients who would otherwise require decades of antiarrhythmic therapy 2

Long-Term Medical Management

• The European Society of Cardiology recommends beta-blockers, verapamil, or class IC sodium channel blockers (flecainide or propafenone) when catheter ablation is not available, not desired by the patient, or has failed 1, 2, 3
• The European Society of Cardiology advises avoiding class IC agents in patients with any history of myocardial infarction or structural heart disease, as they are contraindicated in this population 4

Clinical Recognition and Diagnostic Pearls

• The European Society of Cardiology describes left posterior fascicular VT (>90% of cases) as having a right bundle branch block morphology with superior axis (left axis deviation) and relatively narrow QRS complex (typically <140 ms) 2
• The European Society of Cardiology describes left anterior fascicular VT (<10% of cases) as having a right bundle branch block morphology with right axis deviation 2

Critical Pitfalls to Avoid

• The European Society of Cardiology advises against using IV amiodarone as first-line therapy for fascicular VT when verapamil or beta-blockers are available, as these are more specific and effective for this arrhythmia 1, 2