Successful focal ablation in a patient with electrical storm in the early postinfarction period: case report
Tolga Aksu1, Tumer Erdem Guler1, Ebru Golcuk2
1Department of Cardiology, Derince Training and Research Hospital, Kocaeli, Turkey.
Insights
Early catheter ablation effectively treated electrical storm (ES) in a post-heart attack patient. This approach offers a promising alternative for managing this high-risk condition when it occurs soon after myocardial infarction.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Electrical storm (ES) post-myocardial infarction (MI) carries a poor prognosis.
- Limited data exist on early catheter ablation efficacy and safety for post-MI ES.
- The mechanism of early post-MI ES is not fully understood, differing from later post-infarction cardiomyopathy.
Observation:
- A case of ES was reported where macroreentry was excluded as the VT mechanism.
- Tachycardia was successfully terminated by focal radiofrequency catheter ablation at the earliest activation site.
- The ablation procedure was brief (35 minutes).
Findings:
- The patient remained free of monomorphic ventricular tachycardia (VT) episodes for 12 months post-ablation.
- Focal radiofrequency catheter ablation demonstrated efficacy in terminating ES.
- The study suggests a potential non-macroreentrant mechanism for early post-MI ES.
Implications:
- Radiofrequency catheter ablation may serve as a primary treatment for early post-MI ES.
- Further investigation into the mechanisms of early ES is warranted.
- Early intervention with ablation could improve outcomes for patients experiencing ES post-MI.
Abstract:
Electrical storm (ES) is associated with a poor prognosis if it occurs in the early postinfarction period (within 4 weeks). There are limited data on the efficacy and safety of catheter ablation in the early period. In the patients with postinfarction cardiomyopathy, ventricular tachycardia (VT) is usually caused by re-entry through slowly conducting tissue within areas of a myocardial scar, whereas for the early postinfarction period, the underlying mechanism of ES is not fully understood. We report a case of ES for which macroreentry was excluded as a mechanism of VT because of the clinical and electrophysiological properties of the tachycardia. The tachycardia was terminated by focal radiofrequency catheter ablation of the earliest site. The total procedure time was only 35 minutes. During a 12-month follow-up period, the patient has remained free of monomorphic VT episodes. On the basis of this case, we aimed to discuss the underlying mechanism of ES in the early postinfarction period and to evaluate the role of radiofrequency catheter ablation as a primary approach for treating ES.
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