International Heart Journal
Clinical Studies
Virtual Histology Intravascular Ultrasound Compared With Optical Coherence Tomography for Identification of Thin-Cap Fibroatheroma
Takashi KuboNobuo NakamuraYoshiki MatsuoYasushi OkumotoXiaoFan WuSo-Yeon ChoiKenichi KomukaiTakashi TanimotoYasushi InoHironori KitabataKeizo KimuraMasato MizukoshiToshio ImanishiHideharu AkagiTadao YamamotoTakashi Akasaka
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Volume 52 (2011) Issue 3 Pages 175-179

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Abstract

Virtual histology intravascular ultrasound (VH-IVUS) allows detailed assessment of plaque composition in the clinical setting. Optical coherence tomography (OCT) has been developed as a high-resolution imaging method, which might be a promising technique to identify thin-cap fibroatheroma (TCFA) in vivo. The purpose of the present study was to evaluate the diagnostic accuracy of VH-IVUS to identify TCFA as determined by OCT.
We examined 96 target lesions in patients with stable angina pectoris by using VH-IVUS and OCT. VH-IVUS derived TCFA was defined as a focal necrotic core-rich lesion without evident overlying fibrous tissue. OCT derived TCFA was defined as a plaque with a fibrous cap of < 65 μm. VH-IVUS correctly identified 16 TCFA and 67 non-TCFA but misclassified 2 TCFA and 11 non-TCFA as determined by OCT. The sensitivity, specificity, and positive and negative predictive values of VH-IVUS to identify TCFA as determined by OCT were 89%, 86%, 59%, and 97%, respectively.
VH-IVUS showed an acceptable sensitivity and specificity to identify TCFA as determined by OCT. Although the positive predictive value was low reflecting a high number of false positives, the negative predictive value was notably high. Our results suggest a potential role for VH-IVUS to exclude high risk lesions for future coronary events.

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© 2011 by the International Heart Journal Association
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