Journal of Obesity & Metabolic Syndrome



Korean J Obes 2013; 22(4): 215-221

Published online December 31, 2013

Copyright © Korean Society for the Study of Obesity.

Influence of the Obesity on Clinical Outcomes in the Young Korean Patients with Acute ST-Elevation Myocardial Infarction

Ki-Woon Kang, Seong-Kyu Lee, Hyeon Soo Yoon(1), Jung Yeon Chin, Jin Cheol Myung, Won Ho Kim, Sang Hyun Park, Yu Jeong Choi, Kyung Tae Jung*, Myung Ho Jeong(2), Korean Acute Myocardial Infarction Registry Investigators

Department of Internal Medicine, Eulji University Hospital; Department of Internal Medicine, Worker`s Compensation Hospital(1); and Department of Internal Medicine, Chunnam National University Hospital(2)

Received: October 29, 2013; Reviewed : November 12, 2013; Accepted: November 28, 2013

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Background: Previous reports have demonstrated that obese patients may have better clinical outcomes after percutaneous coronary intervention (PCI) than non-obese patients; however this “obesity paradox” remains still unknown in young patients. Therefore, we investigated the influence of obesity on the outcomes of young patients with acute ST-segment elevation myocardial infarction (STEMI).
Methods: A total of 541 young patients (≤ 45 year old) with acute STEMI undergoing urgent PCI were enrolled in the Korea Acute Myocardial Infarction Registry between January 2008 and Aug 2011. These patients were categorized according to their body mass index (BMI, kg/m2) as non-obese (BMI < 27.5, N = 73), obese (27.5 ≤ BMI < 32.5, N = 183) and morbidly obese (BMI ≥ 32.5, N = 285). At follow-up, the major adverse cardiac events (MACE; defined as death, myocardial infarction, and target vessel revascularization) were compared among the three groups.
Results: The mean duration of follow-up was 384 ± 82 days. Among the three groups, age, sex, cardiovascular risk factors and left ventricular ejection fraction were similar and number of infarct-related artery or stenotic coronary artery was also similar. The length of stay in the coronary care
unit was shorter among the obese and morbidly obese group compared with that of the non-obese group. In-hospital death and clinical outcomes among the three groups were not significantly different. At follow-up, the one-year MACE-free survival rate of those groups was not significantly different (93% in non-obese, 94% in obese and 95% in morbidly obese).
Conclusion: In young patients with STEMI undergoing urgent PCI, influence of obesity on clinical outcomes was not observed as significant in the young Korean patients.

Keywords: Acute myocardial infarction, Young patients, Obesity

Fig. 1. One-year Kaplan-Meier estimates of MACE-free survival rate among the three groups. MACE, major adverse cardiac event.

Baseline clinical characteristics

Angiographic and procedural characteristics

In-hospital management

Clinical outcomes

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