Major findings
In this report, we demonstrate a phenomenon of aberrancy being essential
for certain ORT cases. The major findings included:
- In the cases of ORTs relying on aberrancy, all APs are anterolateral
pathways located on the same side of BBB.
- Clinical tachycardia episodes were often short in time.
- Stimulation during single bundle branch refractoriness is required for
inducing tachycardia.
- Resolution of aberration was followed by the shortening of subsequent
VA interval which was responsible for tachycardia cessation.
- The block site of tachycardia after BBB resolution can be AP or AV
node.