Sustained Ventricular Tachycardia Definition and Management
Introduction to Sustained Ventricular Tachycardia
- Sustained ventricular tachycardia (VT) is defined as VT that lasts greater than 30 seconds in duration and/or requires termination due to hemodynamic compromise in less than 30 seconds, according to the European Heart Journal and other sources 1, 2, 3, 4
Characteristics of Ventricular Tachycardia
- Ventricular tachycardia is characterized by a cardiac arrhythmia of 3 or more consecutive complexes, originating in the ventricles, with a rate greater than 100 beats per minute (cycle length less than 600 ms) and QRS duration typically >120 ms without regularly occurring P:QRS association 1, 2, 3, 4
Clinical Importance of Sustained VT
- The distinction between sustained and nonsustained VT is important for clinical management and prognostic implications, with sustained VT associated with higher mortality rates, even when hemodynamically stable 1, 2, 3, 4
Treatment Approach
- Hemodynamically unstable patients with sustained VT require immediate synchronized cardioversion, as recommended by the European Heart Journal and other sources 5
- Hemodynamically stable patients with sustained VT may be treated with antiarrhythmic medications, though cardioversion is still often necessary, and may require consideration for implantable cardioverter-defibrillator (ICD) therapy, particularly those with structural heart disease 6, 5
Long-term Management
- Patients with sustained VT often require consideration for implantable cardioverter-defibrillator (ICD) therapy, particularly those with structural heart disease, as recommended by the European Heart Journal and other sources 6, 5
- Long-term management may also include catheter ablation and/or antiarrhythmic medications, such as procainamide 10 mg/kg IV, which is recommended as first-line for monomorphic VT without severe heart failure or acute MI 5