Idiopathic Fascicular VT: What to Do When Intravenous Verapamil Has Not Restored Sinus Rhythm

This protocol addresses the management of haemodynamically stable idiopathic fascicular ventricular tachycardia after a first-line attempt with intravenous verapamil has failed to terminate the arrhythmia.

Clinical Scenario

Idiopathic fascicular ventricular tachycardia that is haemodynamically tolerated — no haemodynamic instability present — requiring an escalation step because conversion to sinus rhythm was not achieved with initial management.

Previous Treatment — Goal Not Reached

First-line therapy with intravenous verapamil was administered. The intended outcome — termination of ventricular tachycardia with conversion to sinus rhythm — was not achieved. This protocol defines the next management step.

Next-Step Approach (Partial Overview)

Escalation involves an electrical intervention directed at terminating the arrhythmia. The goal remains restoration of sinus rhythm. The full procedural approach and structured sequence are available in the complete protocol below.

Instant Access to Structured Evidence-Based Regimens

References

DOI: 10.1093/eurheartj/ehac262

In patients presenting with a haemodynamically tolerated idiopathic VT, treatment with intravenous beta-blocker (RVOT VT) or verapamil (fascicular VT) is recommended.

In case of a known idiopathic VT (Figure 4), treatment with beta-blockers (for RVOT VT) or verapamil (for fascicular VT) is recommended for acute conversion.

Termination can be achieved with electrical cardioversion, anti-arrhythmic medications, or pacing techniques.

View source ↗