What is it?
IVUS is a miniature ultrasound probe and OCT a very high-resolution optical technology; both give cross-sectional images from inside the artery, showing true vessel size, lesion length, calcium and stent expansion.
Who needs it?
Left main disease, long and bifurcation lesions, heavy calcium, in-stent restenosis and any case where angiography alone is ambiguous.
How is it done?
The imaging catheter is advanced over the wire beyond the lesion and pulled back automatically within seconds. The images guide balloon and stent sizing and final optimisation.
Before the procedure
No extra preparation beyond that for angioplasty.
After & recovery
Large international trials show imaging-guided PCI reduces cardiac events and repeat procedures.
Risks & safety
Very safe; OCT needs a small extra amount of contrast, used cautiously in kidney disease.
Frequently asked questions
IVUS or OCT?
Both are valuable: OCT has higher resolution; IVUS penetrates deeper and needs less contrast.
Does it prolong the procedure?
Usually by only a few minutes.
This content does not replace an examination by your physician. For chest pain or severe shortness of breath, call your local emergency number immediately.