What does 'jailed' refer to in the context of coronary stenting?

• A. Obstruction of a major or side branch by stent deployment across a main lesion.
• B. A technique to widen a bifurcation using two balloons.
• C. A restenosis pattern after stenting.
• D. A type of balloon used in PTA.

Answer: (A)

Jailed refers to a side branch being covered by stent struts when a stent is deployed across a main-vessel lesion at a bifurcation. The side-branch ostium becomes effectively trapped or blocked by the main-vessel stent, which can impede access or flow to that side branch and may require techniques to protect or reopen the side branch (like rewiring or targeted ballooning). The other options describe different concepts—using two balloons to widen a bifurcation, a restenosis pattern, or a type of balloon—none of which define the term jailed.