Why is intravascular imaging important for calcified lesions?

• A. It helps assess calcification distribution and plan atherectomy, scoring balloon use, or alternative strategies to ensure adequate stent expansion.
• B. It reduces the volume of contrast required to perform the procedure.
• C. It eliminates the need for dual antiplatelet therapy.
• D. It replaces the need for angiography during PCI.

Answer: (A)

Intravascular imaging is essential for calcified lesions because it reveals the calcium within the vessel wall in detail—how much there is, where it sits (circumferential vs. eccentric), how thick it is, and how long the calcified segments are. This information guides how you prepare the lesion before stent deployment. If the calcium is heavy or nodular, simple balloon dilation may not adequately expand the vessel, so you can plan plaque modification with atherectomy, scoring or cutting balloons, or lithotripsy to fracture or debulk the calcium and create a lumen that will allow the stent to expand properly. By understanding the distribution and severity of calcium, you can choose the right strategy to achieve an adequate minimal stent area, which lowers the risk of stent underexpansion, restenosis, and thrombosis.

Angiography alone shows the lumen but can miss or underestimate calcium. Intravascular imaging provides the critical details that tailor the treatment plan and optimize outcomes. It does not replace angiography or eliminate the need for standard PCI care, but it greatly improves decision-making in calcified disease.