[Efficacy and safety of the coronary intervention therapy to prevent electrical storm in patients with coronary artery disease but without myocardial infarction].

OBJECTIVE: To study the efficacy and safety of the coronary interventional therapy to prevent electrical storm (ES) in patients with coronary artery diseases (CAD) but without myocardial infarction or ischemic cardiomyopathy. METHODS: Coronary angiography and stent implantation were performed in CAD patients with ES as major symptom, according to the standardized methods. Holter Electrocardiography was recorded regularly during follow-up. RESULTS: Six patients, five male and one female, with mean age of 49.5 +/- 9.1 year-old, were hospitalized. In 2 patients with repetitive syncope, multiple episodes of ventricular tachycardia and/or ventricular fibrillation (VF) were documented by Holter recording. One patient developed VF during exercise test. Three patients experienced chest pain and multiple episodes of cardiac arrest. Before procedure, averaged 16.5 +/- 5.3 episodes of syncope or VF were documented in 6 patients. Coronary angiography revealed severe one or multi-vessel diseases. Total 8 stents, including 3 drug-eluting stents, were implanted in 6 patients. Symptom, ST-T changes and ES disappeared after coronary stenting. During 4 month to 6.5 year follow-up (mean 47.7 +/- 30.7 months), ES was not documented, no appropriated shock occurred in patients with implantable defibrillator for 6.5 years. CONCLUSION: In CAD patients without myocardial infarction, coronary stenting can relieve the ischemic substrate of ES, hence prevents sudden death effectively.