Ventricular tachycardia (VT) may be classified as:
- Sustained or nonsustained – Sustained VT is defined as persistence for ≥30 seconds. Nonsustained VT is defined as duration of >3 beats but spontaneous termination within 30 seconds.
- Monomorphic or polymorphic – Morphology of all QRS complexes is the same in monomorphic VT, whereas beat-to-beat variation in QRS morphology is seen in polymorphic VT.
In patients at high risk for arrhythmia and a history of dual-chamber implanted cardioverter-defibrillator placement, exposure to higher levels of fine pollution particles (particulate matter ≤2.5 µm aerodynamic diameter; PM2.5) was associated with higher odds of ventricular arrhythmia.
Treatment varies depending on the presenting symptoms and hemodynamic stability. Options may include cardiopulmonary resuscitation, electrical defibrillation, or use of antiarrhythmic drugs (eg, amiodarone). Patients with a history of life-threatening or recurrent VT will often undergo radiofrequency catheter ablation and/or placement of an implantable cardioverter defibrillator (ICD). Subcutaneous versus transvenous placement of the ICD is under study.
I47.2 – Ventricular tachycardia
25569003 – Ventricular tachycardia