Conclusions
In ORTs utilizing anterolateral APs, extra transseptal conduction time
caused by aberrancy can be an integral part of the circuit, which
enables reentrant activation by enlarging the circuit. It can explain
the infrequent or late onset and unsustainable episodes of ORT in
certain patients with APs, which can also be regarded as a useful tool
in understanding the mechanism and localizing the AP.