Long-term outcome following programmed electrical stimulation in patients with high-grade ventricular ectopy

Area of Science:

• Cardiology
• Electrophysiology
• Sudden Cardiac Death Research

Background:

• High-grade ventricular ectopy poses a risk for sudden cardiac death.
• Identifying patients at high risk is crucial for effective management.
• Conventional antiarrhythmic agents are not always effective.

Purpose of the Study:

• To evaluate programmed electrical stimulation (PES) for risk stratification in patients with high-grade ventricular ectopy.
• To determine if PES can differentiate low-risk from high-risk patients for sudden cardiac death.
• To assess the utility of PES in guiding antiarrhythmic therapy decisions.

Main Methods:

• Programmed electrical stimulation (PES) was performed in 40 patients with high-grade ventricular ectopy.
• Patients were categorized into Group I (inducible sustained monomorphic ventricular tachycardia) and Group II (non-inducible).
• Follow-up data on mortality, particularly sudden cardiac death, was collected.

Main Results:

• Eight patients (Group I) had inducible sustained ventricular tachycardia, while 32 (Group II) did not.
• Inducible ventricular tachycardia was more common in patients with previous myocardial infarction (33%).
• None of the deaths observed were sudden cardiac deaths during the follow-up period.

Conclusions:

• Programmed electrical stimulation is a valuable tool for risk stratification in high-grade ventricular ectopy.
• Patients without inducible ventricular tachycardia during PES have a very low risk of sudden cardiac death.
• PES findings can potentially guide the need for antiarrhythmic therapy in these patients.