Key result
Differential effective refractory periods and preexcitation patterns can serve as useful markers to identify multiple adjacent accessory pathways in a patient.
Why the study?
Accessory pathway ablation failure may be related to multiple pathways that go unrecognized during electrophysiology study and predispose to malignant atrial arrhythmias.
Case Report (n=1)
Differential effective refractory periods can serve as a useful marker to identify multiple adjacent accessory pathways during electrophysiology studies, potentially preventing ablation failure.
Hypothesis-generating for identifying multiple accessory pathways; prospective validation needed before clinical adoption.
Accessory pathway (AP) ablation failure may be related to multiple pathways which go unrecognized at the time of electrophysiology study. We present a patient who had two adjacent APs based on different preexcitation patterns as well as effective refractory periods (ERPs) which have not been previously described. Apart from leading to recurrent supraventricular tachycardia (SVT), multiple pathways are important to recognize as they more frequently predispose to malignant atrial arrhythmias.
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Helm et al. (2019) conducted a case report in Multiple accessory pathways (n=1). Differential effective refractory period was evaluated. Differential effective refractory periods and preexcitation patterns can serve as useful markers to identify multiple adjacent accessory pathways in a patient.
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