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New Study Linked Blood Sugar Fluctuations in Non-DM Patients to Endothelial Dysfunction

and Poor Outcomes

J Am Heart Assoc. 2017 Apr 26;6(5). pii: e004841. doi: 10.1161/JAHA.116.004841.

Effects of the Mean Amplitude of Glycemic Excursions and Vascular Endothelial Dysfunction on Cardiovascular Events in Nondiabetic Patients With Coronary Artery Disease.

Akasaka T1, Sueta D1, Tabata N1, Takashio S1, Yamamoto E1, Izumiya Y1, Tsujita K1, Kojima S1, Kaikita K1, Matsui K1, Hokimoto S2.

Author information 1Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.2Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan


BACKGROUND: Mean amplitude of glycemic excursion (MAGE) is commonly used to gauge the degree of glucose level fluctuations. MAGE plays a significant role in vascular endothelial dysfunction and cardiovascular events in patients with diabetes mellitus (DM), but its significance is not clear in non-DM patients. Thus, we examined the impact of MAGE and vascular endothelial dysfunction on clinical outcomes in non-DM patients with coronary artery disease.

METHODS AND RESULTS: We followed non-DM patients (n=65) for 12 months who underwent percutaneous coronary intervention and assessed the relationship among MAGE, reactive hyperemia index (RHI) measured by reactive hyperemia peripheral arterial tonometry as endothelial function, and cardiovascular events. Cardiovascular events analyzed were cardiovascular death, myocardial infarction, unstable angina, and revascularizations. Compared with patients with MAGE <65 mg/dL (normal glycemic excursions), the group with MAGE ≥65 mg/dL (high glycemic excursions) had significantly higher high-sensitivity C-reactive protein (0.10±0.11 mg/dL versus 0.18±0.13 mg/dL, P=0.006) and lower RHI (0.64±0.21 versus 0.51±0.22, P=0.035). The multivariable analysis identified high MAGE and low RHI (≤0.56) as risk factors associated with cardiovascular events (hazard ratio, 5.6; 95% RI, 1.72-18.4 [P=0.004] versus hazard ratio, 4.5; 95% RI, 1.37-14.9 [P=0.013]). When the prognosis was classified by combination with MAGE and RHI, the incidence of cardiovascular events was 46.7% (high MAGE+low RHI), 26.7% (high MAGE+high RHI), 20.0% (low MAGE+low RHI), and 6.6% (low MAGE+high RHI) in descending order (P=0.014). Receiver operating characteristic curve analysis revealed that MAGE, RHI, and MAGE+RHI were each associated with cardiovascular events (area under the curve 0.780, 0.727, and 0.796, respectively).

CONCLUSIONS: MAGE was associated with cardiovascular events in non-DM patients with coronary artery disease. Furthermore, the combination with MAGE and RHI was useful for further subdivision of the risk of cardiovascular events. © 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley. UPTO application number 14/377,249

KEYWORDS: cardiovascular events; mean amplitude of glycemic excursions; reactive hyperemia index


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