Comparison of Clinical Characteristics and Arterial Remodeling by Intravascular Ultrasonic Imaging in Three Age Groups (≤55, 56 to 69 and ≥70 Years) of Japanese Patients With Acute Myocardial Infarction

Shoichi Ehara, Takahiko Naruko, Yoshiki Kobayashi, Toru Kataoka, Masashi Nakagawa, Nobuyuki Shirai, Hideshi Ishii, Takuhiro Okuyama, Hiroki Oe, Kenichi Sugioka, Takeshi Hozumi, Kazuo Haze, Junichi Yoshikawa, Minoru Yoshiyama, Makiko Ueda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Recent epidemiologic, pathologic, and intravascular ultrasound (IVUS) studies have shown that there are differences in coronary risk factors or plaque morphology between younger and older patients with acute myocardial infarctions (AMIs). This study examined clinical background and plaque morphology using IVUS in younger and older adults with AMIs in Japan. The study population consisted of 96 patients with AMIs, for whom preinterventional IVUS images were obtained. Patients were classified into 3 groups: a young group (aged ≤55 years), a middle-aged group (aged 56 to 69 years), and an old group (aged ≥70 years). The remodeling index was defined as the ratio of the external elastic membrane area at the culprit lesion to the external elastic membrane area at the proximal reference site. Expansive remodeling was defined as a remodeling index >1.05 and constrictive remodeling as a remodeling index <0.95. The frequency of hypercholesterolemia was significantly different among the 3 age groups. Total cholesterol (p <0.001), low-density lipoprotein cholesterol (p <0.005), and triglyceride (p <0.05) levels and body mass index (p <0.001) in the young group were significantly higher than in the old group. On IVUS images, constrictive remodeling was most common in the young group, whereas expansive remodeling occurred most commonly in the middle-aged and old groups. In conclusion, this study demonstrated that patients with AMIs in the young group had higher levels of hypercholesterolemia, obesity, and constrictive remodeling compared with those in the old group. The differences in arterial remodeling of the culprit lesions between younger and older patients with AMIs may reflect different biologic mechanisms of plaque activation and destabilization.

Original languageEnglish
Pages (from-to)1713-1717
Number of pages5
JournalAmerican Journal of Cardiology
Volume100
Issue number12
DOIs
Publication statusPublished - Dec 15 2007

    Fingerprint

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Ehara, S., Naruko, T., Kobayashi, Y., Kataoka, T., Nakagawa, M., Shirai, N., Ishii, H., Okuyama, T., Oe, H., Sugioka, K., Hozumi, T., Haze, K., Yoshikawa, J., Yoshiyama, M., & Ueda, M. (2007). Comparison of Clinical Characteristics and Arterial Remodeling by Intravascular Ultrasonic Imaging in Three Age Groups (≤55, 56 to 69 and ≥70 Years) of Japanese Patients With Acute Myocardial Infarction. American Journal of Cardiology, 100(12), 1713-1717. https://doi.org/10.1016/j.amjcard.2007.07.021