Management Approach for Ventricular Tachycardia

Classification and Initial Assessment

The European Society of Cardiology recommends that direct current cardioversion is the first-line treatment for patients presenting with sustained ventricular tachycardia (VT) and hemodynamic instability 1
Ventricular tachycardia can be classified based on morphology, with monomorphic VT having consistent QRS morphology 2 and polymorphic VT having continually changing QRS morphology, often associated with acute myocardial ischemia, channelopathies, or ventricular hypertrophy 1
The American College of Cardiology suggests that any wide-QRS tachycardia should be presumed to be VT if the diagnosis is unclear 2, 3
A 12-lead ECG should be recorded for all patients with sustained VT who present in a hemodynamically stable condition, as recommended by the European Heart Journal 1
Diagnostic clues for VT include an RS interval >100 ms in any precordial lead, negative concordance in precordial leads, presence of fusion beats, and QR complexes, as indicated by the Journal of the American College of Cardiology 4

For hemodynamically unstable VT, immediate synchronized cardioversion with appropriate sedation is recommended by the European Heart Journal 2, 1, 3
For hemodynamically stable monomorphic VT, the first-line approach is direct current cardioversion with appropriate sedation, as suggested by the European Heart Journal 2, 1
The European Heart Journal recommends that intravenous procainamide be used as the first choice for medical management of hemodynamically stable monomorphic VT, at a dose of 20-30 mg/min up to 10 mg/kg 2
For polymorphic VT, the first-line treatment is direct current cardioversion for hemodynamically unstable patients, as recommended by the European Heart Journal 2, 3
The European Heart Journal suggests that intravenous beta-blockers, especially if ischemia is suspected, and intravenous amiodarone loading in the absence of abnormal repolarization related to long QT syndrome, be used for recurrent polymorphic VT 2, 3

Coronary revascularization is recommended if VT is associated with ischemic heart disease, as indicated by the European Heart Journal 5
The European Society of Cardiology recommends that implantable cardioverter-defibrillator (ICD) placement be considered for patients with structural heart disease and sustained VT, although the specific details are not provided in the cited references

Misdiagnosis of wide-complex tachycardias is common, and when in doubt, treatment as VT is recommended by the European Heart Journal 2, 4
Adenosine should be used with caution in wide-complex tachycardias of unknown origin, as it may precipitate ventricular fibrillation in patients with coronary artery disease, as indicated by the Journal of the American College of Cardiology 4