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Prediction of infarct severity from triiodothyronine levels in patients with ST-elevation myocardial infarction

The Korean Journal of Internal Medicine 2014년 29권 4호 p.454 ~ p.465

김동훈(Kim Dong-Hun) - Chosun University School of Medicine Department of Radiology
최동현(Choi Dong-Hyun) - Chosun University School of Medicine Department of Internal Medicine
김현욱(Kim Hyun-Wook) - Chosun University School of Medicine Department of Internal Medicine
최서원(Choi Seo-Won) - Chosun University School of Medicine Department of Internal Medicine
김보배(Kim Bo-Bae) - Chosun University School of Medicine Department of Internal Medicine
정중화(Chung Joong-Wha) - Chosun University School of Medicine Department of Internal Medicine
고영엽(Koh Young-Youp) - Chosun University School of Medicine Department of Internal Medicine
장경식(Chang Kyong-Sig) - Chosun University School of Medicine Department of Internal Medicine
홍순표(Hong Soon-Pyo) - Chosun University School of Medicine Department of Internal Medicine

Abstract

Background/Aims: The aim of the present study was to evaluate the relationship between thyroid hormone levels and infarct severity in patients with ST-elevation myocardial infarction (STEMI).

Methods: We retrospectively reviewed thyroid hormone levels, infarct severity, and the extent of transmurality in 40 STEMI patients evaluated via contrast-enhanced cardiac magnetic resonance imaging.

Results: The high triiodothyronine (T3) group (≥ 68.3 ng/dL) exhibited a significantly higher extent of transmural involvement (late transmural enhancement > 75% after administration of gadolinium contrast agent) than did the low T3 group (60% vs. 15%; p = 0.003). However, no significant difference was evident between the high- and low-thyroid-stimulating hormone/free thyroxine (FT4) groups. When the T3 cutoff level was set to 68.3 ng/dL using a receiver operating characteristic curve, the sensitivity was 80% and the specificity 68% in terms of differentiating between those with and without transmural involvement. Upon logistic regression analysis, high T3 level was an independent predictor of transmural involvement after adjustment for the presence of diabetes mellitus (DM) and the use of glycoprotein IIb/IIIa inhibitors (odds ratio, 40.62; 95% confidence interval, 3.29 to 502; p = 0.004).

Conclusions: The T3 level predicted transmural involvement that was independent of glycoprotein IIb/IIIa inhibitor use and DM positivity.