Key result
Purkinje-myocardial activation recovery intervals map action potential duration during ventricular fibrillation storm.
Why the study?
The ablation strategy targeting Purkinje potentials for ventricular fibrillation storm in myocardial infarction remains to be established.
Case Report (n=1)
Activation recovery interval (ARI) measurement may help guide catheter ablation strategies for life-threatening ventricular fibrillation storms triggered by premature ventricular contractions.
Answers are grounded in this paper and cite their sources.
ARI at Purkinje-myocardial junction may mark repolarization in VF storm; extends ablation targets but leaves open clinical utility.
Ventricular fibrillation (VF) storm in myocardial infarction is a life-threatening condition. Catheter ablation targeting the Purkinje potentials is an effective treatment for VF storm with myocardial infarction, 1 but the ablation strategy remains to be established. Premature ventricular contractions that occur in an area with an extremely short recovery time (RT) or a steep RT gradient can trigger ventricular fibrillation. 2 The activation recovery interval (ARI), which is the difference between the recovery time and activation time, has been proposed as a useful measurement of the duration of the action potential in the myocardial tissue.
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Nasu et al. (2026) conducted a case report in Ventricular fibrillation storm (n=1). Activation recovery interval (ARI) analysis was evaluated. The activation recovery interval (ARI) at the Purkinje fiber-myocardial junction was analyzed as a measurement of action potential duration in a case of ventricular fibrillation storm.
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