|Adequate Image Quality, Length, mm||Complete Visualization of False Lumen, Length, mm||Rupture Site Identification||True Lumen Minimal Area, mm2||False Lumen Maximal Area, mm2||Minimal True/False Lumen ratio|
|48 ± 25/63 ± 31||17 ± 11/35 ± 26∗||6/2||1.8 ± 1.3/2.7 ± 1.6||6.4 ± 4.4/8.8 ± 4.1∗||0.4 ± 0.2/0.4 ± 0.1|
Values are presented in pairs (OCT/IVUS). OCT was performed with time domain (n = 3) or frequency domain (n = 5) systems. OCT measurements were performed using proprietary software. IVUS imaging was performed with mechanical catheters and measured with validated system. Special care was taken to ensure adequate matching, but eventually some differences among techniques resulted from measurements obtained at different sites as the result of shadowing/attenuation on OCT. Minimal (185 ± 64 μm vs. 191 ± 63 μm) and maximal (409 ± 131 μm vs. 349 ± 68 μm) thickness of the intimomedial membrane was similar on OCT and IVUS. However, the intimal tear was better recognized by OCT, whereas IVUS allowed a longer and deeper analysis of the diseased coronary segment.
IVUS = intravascular ultrasound; OCT = optical coherence tomography; + = quantitative data not available.
↵∗ p < 0.05 (OCT vs. IVUS).