monomorphic ventricular tachycardia
Regular wide-complex tachycardia with consistent QRS morphology typically arising from reentrant circuits in scarred myocardium.
Full Definition
A form of ventricular tachycardia characterized by regular rhythm and consistent QRS morphology from beat to beat, indicating a stable reentrant circuit typically located in areas of myocardial scar or fibrosis. Monomorphic VT most commonly occurs in patients with structural heart disease, particularly those with prior myocardial infarction or cardiomyopathy. The stable circuit allows for detailed electrophysiologic mapping and targeted ablation therapy. Clinical presentation varies from hemodynamically stable to unstable depending on cycle length and underlying ventricular function. Documentation must include cycle length, QRS morphology description, and hemodynamic tolerance.
Usage
Usage note: Always distinguish from polymorphic VT and document QRS morphology characteristics.
In Context
- "Sustained monomorphic ventricular tachycardia at 180 bpm was successfully terminated with overdrive pacing." — EP study report
- "The patient's recurrent monomorphic VT morphology matched that induced during programmed stimulation." — VT ablation procedure note