Key result
Catheter ablation successfully reduced the frequency of ventricular tachycardia from 35 per month to 1.1 times per month in a patient with electrical storms refractory to antiarrhythmic drugs.
Why the study?
Does catheter ablation reduce the frequency of ventricular tachycardia in a patient with repaired congenital heart disease and electrical storm refractory to antiarrhythmic drugs?
Case Report (n=1)
No
Does catheter ablation reduce the frequency of ventricular tachycardia in a patient with repaired congenital heart disease and electrical storm refractory to antiarrhythmic drugs?
Absolute Event Rate: 1.1% vs 35%
Catheter ablation guided by pace-mapping can effectively reduce the frequency of ventricular tachycardia in patients with repaired congenital heart disease and electrical storm refractory to antiarrhythmic drugs.
Supports ablation for refractory VT post-congenital repair; hypothesis-generating and requires prospective confirmation.
An electrical storm is defined as multiple occurrences of ventricular tachycardia/fibrillation (VT/VF) within a single day; this is a medical emergency and a poor prognostic marker in patients with an implantable cardioverter-defibrillator (ICD). We report here on the occurrence of electrical storms in a 35-year-old man with a repaired DCRV and ICD. He had recurrent VT and electrical storms that were refractory to amiodarone and β-blocker. A cardiac electrophysiologic study was performed 11 months after the ICD was implanted and two forms of VT were induced. After the catheter ablation of the VTs, the monomorphic VT became non-inducible. The frequency of the VT decreased from 35 per month before the catheter ablation to 1.1 times per month after the procedure. Catheter ablation of VT could be an effective treatment for patients with electrical storms refractory to antiarrhythmic drugs. (Korean Circ J 2008;38:60-65)
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Kim et al. (2008) conducted a case report in Electrical storm and recurrent ventricular tachycardia (n=1). Catheter ablation vs. Pre-ablation baseline was evaluated on Frequency of ventricular tachycardia. Catheter ablation successfully reduced the frequency of ventricular tachycardia from 35 per month to 1.1 times per month in a patient with electrical storms refractory to antiarrhythmic drugs.
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