Optical Coherence Tomography (OCT)
What Is Optical Coherence Tomography (OCT)?
Why do I need this test?
Your doctor may recommend OCT if you have:
Suspected coronary artery disease (CAD)
Unclear findings on coronary angiography
Undergoing angioplasty or stenting
Need for detailed plaque characterization
To assess stent expansion or apposition
Prior stent complications like restenosis or thrombosis
OCT helps in precisely diagnosing the type, severity, and structure of arterial blockages and supports better treatment outcomes.
What happens during the procedure?
OCT is performed as part of a cardiac catheterization procedure. Here’s what typically happens:
A thin imaging catheter is inserted into the coronary artery through the groin or wrist
The area is flushed with contrast dye to clear blood for a clear image
Near-infrared light is used to create detailed, 3D-like images of the artery
The data helps identify plaque types (fibrous, calcified, lipid-rich) and plan stenting
Post-stenting, OCT can confirm optimal expansion and positioning of the stent
The imaging process itself takes just a few minutes, but adds valuable precision to the overall procedure.
What might I feel?
Slight pressure at the catheter insertion site
Warmth or flushing due to contrast dye injection
Brief discomfort during catheter movement
Overall, the process is minimally uncomfortable and quick
The test is considered safe and painless, with a very low risk of complications.
What happens after the test?
The imaging catheter is removed
Pressure is applied to the puncture site to prevent bleeding
You’ll be monitored for a short time in recovery
Your doctor will review the OCT images and adjust treatment if needed
You can typically resume light activities the same day or next
OCT provides exceptional visualization inside your arteries, allowing your doctor to deliver safer, more precise, and personalized care during coronary interventions.