Long term lorcainide therapy guided by electrophysiology studies

Area of Science:

• Cardiology
• Clinical Electrophysiology

Background:

• Drug-resistant ventricular tachycardia (VT) poses a significant therapeutic challenge.
• Programmed electrical stimulation (PES) is crucial for assessing antiarrhythmic drug efficacy.

Purpose of the Study:

• To compare the efficacy and tolerability of lorcainide, procainamide, and lidocaine in patients with inducible VT.
• To evaluate long-term outcomes of antiarrhythmic drug therapy initiated after electrophysiologic testing.

Main Methods:

• Serial drug testing with intravenous administration of lorcainide, procainamide, and lidocaine in 100 patients with inducible VT.
• Repeat PES studies were conducted after each drug administration to assess efficacy.
• Long-term follow-up was performed to evaluate continued drug therapy and patient outcomes.

Main Results:

• Lorcainide prevented VT induction in 69% of patients, procainamide in 50%, and lidocaine in 30%.
• Following testing, 46 patients were initiated on lorcainide, with 70% remaining on therapy long-term.
• Despite side effects like sleep disturbances, lorcainide was well-tolerated and effective for prolonged administration.

Conclusions:

• Lorcainide demonstrates superior efficacy in preventing VT induction compared to procainamide and lidocaine.
• Long-term lorcainide therapy is a viable and well-tolerated option for managing patients with inducible VT.
• Serial drug testing via PES is effective in guiding antiarrhythmic drug selection for sustained efficacy.