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University from September 2021 to January 2022. All of them performed echocardiography,coronary angiography with left cardiac
catheterization〔estimating LVEDP,left ventricular end-systolic volume(LVESV),left ventricular end-diastolic volume(LVEDV)
and left ventricular ejection fraction(LVEF)〕,SPECT〔estimating LVESV',LVEDV',LVEF',peak filling rate(PFR),
the first third filling fraction(1/3FF),the first third filling rate(1/3FR),mean filling rate(MFR),and peak filling time
(TPF)〕within one to three days of admission. Based on coronary angiography data,all patients had at least one sub-epicardial
coronary artery stenosed to over 50%. The general data,laboratory indices,and indices of left heart function were compared
between patients with normal LV diastolic function(n=50,LVEDP<16 mm Hg) and those with LV diastolic dysfunction(n=47,
LVEDP ≥ 16 mm Hg). The correlation of LVEDP with SPECT parameters was analyzed. The receiver operating characteristic
(ROC) curve was applied to evaluate the predictive value of SPECT parameters for elevated LVEDP. Results Patients with
LV diastolic dysfunction had lower LVEF',PFR,1/3FF,1/3FR,MFR,and higher TPF(P<0.05). The results of correlation
analysis showed that there was a positive correlation between LVESV' and LVESV,and LVEDV' and LVEDV,LVEF' and LVEF
(r s =0.726,P<0.001;r s =0.651,P<0.001;r=0.450,P<0.001). PFR,1/3FF,1/3FR or MFR was negatively correlated with
LVEDP(r s =-0.481,r s =-0.212,r=-0.354,r s =-0.305,P<0.05). TPF was positively correlated with LVEDP(r=0.442,
P<0.001). In predicting elevated LVEDP,the area under the ROC curve(AUC) of PFR was 0.778 with 60% sensitivity and
84% specificity,the AUC of 1/3FF was 0.662 with 75% sensitivity and 62% specificity,the AUC of 1/3FR was 0.653 with 57%
sensitivity and 78% specificity,the AUC of MFR was 0.663 with 62% sensitivity and 68% specificity,and the AUC of TPF
was 0.755 with 77% sensitivity and 70% specificity. Conclusion For patients with coronary heart disease and LVEF ≥ 50%,
diastolic function parameters obtained by SPECT can identify the increase of LVEDP,among which PFR and TPF indices have
good feasibility and higher accuracy.
【Key words】 Coronary disease;Ventricular function,left;Left ventricular diastolic function;Stroke volume;
Single photon emission computed tomography computed tomography;Cardiac catheterization
心血管疾病逐渐成为公共卫生医疗问题之一 [1] 。 1 对象与方法
China-HF 研究显示,目前我国心力衰竭的主要合并症 1.1 研究对象 前瞻性选择 2021 年 9 月至 2022 年 1
中冠心病约占 49.6% [2] 。绝大多数冠心病患者常在出 月于徐州医科大学附属医院心内科就诊,因可疑或已知
现左心室收缩功能障碍前,就已经存在左心室舒张功能 冠心病行冠状动脉造影(CAG)检查并同时行左心导管
障碍 [3-4] 。因此,早期发现和准确评估左心室舒张功能 检查的患者 97 例为研究对象。纳入标准:(1)可疑冠
障碍,对患者的早期诊断及治疗具有重要意义。 心病患者均在入院后 1~3 d 完成超声心动图、SPECT 检
目前指南推荐超声心动图作为常用的评价左心室舒 查,后行 CAG 检查发现心外膜下冠状动脉直径狭窄超
张功能的方法 [5] ,因为其可以在床边轻松、无创地进 过 50%,确诊为冠心病 [8] ;(2)窦性心律;(3)血
行,但其评估左心室舒张功能的指标需要在较多的信息 流动力学稳定;(4)左心室射血分数(LVEF)(根据
背景下进行解读,目前仍没有单一的超声心动图参数可 左心室造影检查结果)≥50%。排除标准:肺源性心脏病、
以直接测量左心室舒张功能 [6] ,同时其受操作者经验 先天性心脏病、风湿性心脏病、心肌病及心包疾病、甲
和水平影响较大。相比之下,单光子发射计算机断层显 状腺功能亢进、心律失常、严重贫血、严重肝肾功能障碍、
像(SPECT)作为临床上独特的检查手段,可以通过 1 SPECT 测得的左心室收缩末期容积(LVESV')<20 ml
次检查同时评估心肌灌注、局部室壁运动异常和左心室 (因为在非常小容量的患者中,左心室容量和功能的评
功能,且 SPECT 自动提供功能参数,因此可以最小化 估不准确 [9-10] )。本研究经过徐州医科大学附属医院
个体差异 [7] 。但是,SPECT 在评价左心室舒张功能方 医学伦理委员会通过(伦理委员会受理号:XYFY2021-
面的研究目前较少,尤其是对左心室收缩功能正常患者 KL164-01)并且征得患者及其家属同意。
的舒张功能评估更少,因此,本研究以左心导管检查的 1.2 分 组 方 法 将 LVEDP ≥ 16 mm Hg(1 mm Hg
左心室舒张末压(LVEDP)作为评估左心室舒张功能的 =0.133 kPa)定义为左心室充盈压增高 [11-12] 。根据
金标准,应用 SPECT 计算的舒张期参数与左心导管检 LVEDP 测量结果,将患者分为左心室舒张功能正常组
查所测得的指标相比较,分析 SPECT 参数与左心导管 (LVEDP<16 mm Hg,50 例)和左心室舒张功能不全组
检查所得指标的相关性,以及 SPECT 参数预测左心室 (LVEDP ≥ 16 mm Hg,47 例)。
舒张功能不全的灵敏度和特异度,有益于冠心病患者左 1.3 临床资料收集
心室舒张功能障碍的诊断和治疗,从而改善患者预后。 1.3.1 一般资料及实验室指标 收集所有入组患者的一