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首页> 外文期刊>Circulation journal >Relation of myocardial blood volume to left ventricular function and future cardiac events in patients with idiopathic dilated cardiomyopathy.
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Relation of myocardial blood volume to left ventricular function and future cardiac events in patients with idiopathic dilated cardiomyopathy.

机译:特发性扩张型心肌病患者心肌血容量与左心室功能和未来心脏事件的关系。

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BACKGROUND: The hypothesis that myocardial blood volume is associated with left ventricular (LV) dysfunction and future cardiovascular events in patients with idiopathic dilated cardiomyopathy (IDC) was tested using intravenous myocardial contrast echocardiography (MCE). METHODS AND RESULTS: Thirty-five patients with IDC and 10 age-matched healthy control subjects were enrolled. Using MCE, background-subtracted and peak myocardial contrast intensity (calibrated PMCI) were calculated as measures of myocardial blood volume. LV ejection fraction (LVEF) was calculated using the modified Simpson method. Patients with IDC were stratified into 2 groups according to the median value of the calibrated PMCI [high value group (n=17): calibrated PMCI > or = -22.7 dB, low value group (n=18): calibrated PMCI < -22.7 dB]. The calibrated PMCI was markedly reduced in patients with IDC compared with the control subjects (p=0.0025) and closely related to LVEF (r=0.688, p<0.0001). In the multivariate model, calibrated PMCI was the independent variable that predicted cardiac events in patients with IDC. According to the Kaplan-Meier analysis, cardiac event-free rates were significantly lower in the low-value group than in the high-value group (p<0.01). CONCLUSIONS: Myocardial blood volume is closely related to LV dysfunction and future cardiac events in patients with IDC.
机译:背景:使用静脉心肌造影超声心动图(MCE)检验了特发性扩张型心肌病(IDC)患者的心肌血容量与左心室(LV)功能障碍和未来心血管事件相关的假设。方法与结果:35例IDC患者和10例年龄相匹配的健康对照者入组。使用MCE,扣除背景和峰值心肌对比强度(校准的PMCI)作为心肌血容量的度量。左室射血分数(LVEF)使用改良的辛普森方法计算。根据校正后的PMCI的中位数将IDC患者分为两组[高值组(n = 17):校正后的PMCI>或= -22.7 dB,低值组(n = 18):校正后的PMCI <-22.7 D b]。与对照组相比,IDC患者的校正PMCI显着降低(p = 0.0025),并且与LVEF密切相关(r = 0.688,p <0.0001)。在多元模型中,校正后的PMCI是预测IDC患者心脏事件的独立变量。根据Kaplan-Meier分析,低值组的无心脏事件发生率显着低于高值组(p <0.01)。结论:IDC患者的心肌血容量与左室功能障碍和未来心脏事件密切相关。

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