QCA
Also written as: QCA — Quantitative Coronary Angiography
Computer-assisted analysis technique providing precise measurements of coronary artery dimensions from angiographic images.
Full Definition
Quantitative Coronary Angiography (QCA) is a computer-assisted analytical technique that provides objective, reproducible measurements of coronary artery dimensions from conventional angiographic images. QCA systems automatically detect vessel contours and calculate parameters such as minimum lumen diameter, reference vessel diameter, percent diameter stenosis, and lesion length. In cardiovascular research, QCA serves as the standard methodology for angiographic endpoint assessment in clinical trials, particularly for evaluating restenosis rates and procedural outcomes. QCA analysis requires high-quality angiographic images with proper calibration and standardized projections to ensure measurement accuracy and reproducibility across different operators and core laboratories.
Usage
Usage note: Always specify measurement parameters and core laboratory certification when reporting QCA results.
In Context
- "QCA analysis demonstrated a mean late loss of 0.15 mm in the drug-eluting stent group." — angiographic core laboratory report
- "All angiographic images underwent independent QCA analysis by a certified core laboratory." — clinical trial methodology