Author + information
- Makoto Araki, MD, PhDa,
- Tsunenari Soeda, MD, PhDb,∗∗ (, )
- Hyung Oh Kim, MD, PhDa,
- Vikas Thondapu, MD, PhDa,
- Michele Russo, MDa,
- Osamu Kurihara, MD, PhDa,
- Hiroki Shinohara, MDa,
- Yoshiyasu Minami, MD, PhDc,
- Takumi Higuma, MD, PhDd,
- Hang Lee, PhDe,
- Taishi Yonetsu, MDf,
- Tsunekazu Kakuta, MD, PhDg and
- Ik-Kyung Jang, MD, PhD, FACCa,h,∗ ()
- aCardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- bDepartment of Cardiovascular Medicine, Nara Medical University, Kashihara, Nara, Japan
- cDepartment of Cardiovascular Medicine, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
- dDivision of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
- eBiostatistics Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- fDepartment of Interventional Cardiology, Tokyo Medical and Dental University, Tokyo, Japan
- gDepartment of Cardiology, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
- hDivision of Cardiology, Kyung Hee University Hospital, Seoul, South Korea
- ↵∗Addresses for correspondence:
Ik-Kyung Jang, MD, PhD, FACC , Cardiology Division, Massachusetts General Hospital, Harvard Medical School 55 Fruit Street | GRB 800 | Boston, MA 02114, USA Tel: +1-617-726-9226; Fax: +1-617-726-7419
Tsunenari Soeda, MD, PhD, Department of Cardiovascular Medicine, Nara Medical University, 840 Shijo-cho | Kashihara, Nara 634-8522, Japan Tel: + 81-744-22-3051; Fax: + 81-744-22-9726
Background Previous pathology studies demonstrated that thin-cap fibroatheroma (TCFA) is localized in specific segments of the epicardial coronary arteries. A detailed description of in vivo coronary plaques of various phenotypes has not been reported.
Objectives We performed a comprehensive analysis on the distribution of coronary plaques with different phenotypes from our 3-vessel optical coherence tomography (OCT) database.
Methods OCT images of all 3 coronary arteries in 131 patients were analyzed every 1 mm to assess plaque phenotype and features of vulnerability. In addition, plaques were divided into tertiles according to percent area stenosis (%AS).
Results Among 534 plaques identified in 393 coronary arteries, 27.0% were fibrous plaques, 13.3% fibrocalcific plaques, 40.8% thick-cap fibroatheromas, and 18.9% thin-cap fibroatheromas (TCFA). TCFAs showed clustering in the proximal segment, particularly in the left anterior descending (LAD) artery. On the other hand, fibrous plaques were relatively evenly distributed throughout the entire length of the coronary arteries. In patients with acute coronary syndromes (ACS), TCFAs showed stronger proximal clustering in the LAD, two clustering peaks in the right coronary artery, and one clustering peak in the circumflex artery. The pattern of TCFA distribution was less obvious in non-ACS patients. The prevalence of TCFA was higher in the highest %AS tertile, compared to the lowest %AS tertile (30% vs. 9%, p <0.001).
Conclusions The present 3-vessel OCT study demonstrated that TCFAs cluster at specific locations in the epicardial coronary arteries, especially in ACS patients. TCFA was more prevalent in segments with tight stenosis.
Disclosures: Ik-Kyung Jang has received educational grants from Abbott Vascular. They had no role in the design or conduct of this research. The remaining authors have nothing to disclose.
Clinical Trials Registration: MGH OCT registry, https://clinicaltrials.gov/NCT01110538
- Received September 4, 2019.
- Revision received January 6, 2020.
- Accepted January 9, 2020.
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