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首页> 外文期刊>Circulation journal >Close relationship between sympathetic activation and coronary microvascular dysfunction during acute hyperglycemia in subjects with atherosclerotic risk factors.
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Close relationship between sympathetic activation and coronary microvascular dysfunction during acute hyperglycemia in subjects with atherosclerotic risk factors.

机译:患有动脉粥样硬化危险因素的急性高血糖患者的交感神经激活与冠状动脉微血管功能障碍之间的密切关系。

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BACKGROUND: The effect of acute hyperglycemia (AHG) during the oral glucose tolerance test (OGTT) on coronary microvascular function was evaluated, as well as the associations among the changes in coronary microvascular function, oxidative stress, and sympathetic tone. METHODS AND RESULTS: Transthoracic Doppler echocardiography and OGTT were performed in 24 subjects with atherosclerotic risk factors (61+/-9 years). The coronary flow velocity before and during the infusion of adenosine (CFV(hyp)), plasma levels of thiobarbituric acid-reactive substances (TBARS), and the low-frequency/high-frequency power (LF/HF) ratio yielded by power spectral analysis of heart rate variability were measured before and at 1 h during 75-g OGTT. AHG significantly decreased the CFV(hyp), and increased the TBARS and LF/HF. Multiple linear regression analysis revealed that the percent changes in the CFV(hyp) were significantly associated with the percent changes in the LF/HF ratio (beta=-0.43, p<0.05). CONCLUSION: In subjects with atherosclerotic risk factors who may be considered likely to have atherosclerotic arterial damage, AHG seems to induce concomitant coronary microvascular dysfunction, increased oxidative stress, and sympathetic activation. Coronary microvascular dysfunction, therefore, appears to be closely related to sympathetic activation.
机译:背景:评估口服葡萄糖耐量试验(OGTT)期间急性高血糖(AHG)对冠状动脉微血管功能的影响,以及冠状动脉微血管功能变化,氧化应激和交感神经张力之间的关联。方法和结果:对24名患有动脉粥样硬化危险因素的受试者(61 +/- 9岁)进行了经胸多普勒超声心动图和OGTT检查。输注腺苷(CFV(hyp))之前和期间的冠状动脉流速,硫代巴比妥酸反应性物质(TBARS)的血浆水平以及功率谱产生的低频/高频功率(LF / HF)比在75 g OGTT之前和1小时内对心率变异性进行了分析。 AHG显着降低CFV(hyp),并增加TBARS和LF / HF。多元线性回归分析表明,CFV(hyp)的百分比变化与LF / HF比的百分比变化显着相关(β= -0.43,p <0.05)。结论:在具有动脉粥样硬化危险因素的受试者中,可能被认为可能具有动脉粥样硬化性动脉损伤,AHG似乎诱发了伴随的冠状动脉微血管功能障碍,氧化应激增加和交感神经活化。因此,冠状动脉微血管功能障碍似乎与交感神经激活密切相关。

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