QCA 3D
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CAAS QCA 3D Taking coronary quantification to the next level

Two dimensional Quantitative Coronary Analysis (QCA) is, since its introduction over 25 years ago, a frequently chosen method to determine lesion length and stent size during percutaneous coronary interventions (PCI). The analysis can be performed quickly during the PCI procedure as standard coronary angiograms serve as input. Furthermore QCA is the most frequently used analysis tool in large multicenter studies for evaluation of novel interventional methods, pharmaceuticals and devices. Two dimensional QCA has certain limitations. When angiographic views do not show the coronary artery of...

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With the highly accurate length calculation QCA 3D can assist the physician in deciding on the number and length of the stents to be used. True length Median difference between P value (number of length calculated with CAAS measurements) QCA 3D and true length 5 mm -0.06 (-0.15, 0.03) P < 0.0001 (n=122) 10 mm 0.325 (0.04, 0.61) P < 0.0001 (n=126) 20 mm 0.285 (0.003, 0.57) P < 0.0001 (n=124) 25 mm 0.22 (-0.15, 0.58) P < 0.0001 (n=62) 40 mm 0.69 (0.07, 1.31) P < 0.0001 (n=64) Length calculated by CAAS QCA3D compared with true length To determine the accuracy and reproducibility of the...

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angulation parameters. Using a standard angiogram the bifurcation angles can be under or overestimated. QCA 3D allows true bifurcation angle calculation. True carina visualization In 2D projections possible vessel overlap can occur, especially at the bifurcated region. Combining two projections will result in an optimal 3D reconstruction of the bifurcation area without vessel overlap [2]. Conclusion 3D QCA can be easily applied during routine PCI to support daily decision making such as whether to stent and if so which stent should be used. Thus 3D QCA can play a role in optimal patient...

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