基于心脏MRI探讨非缺血性心肌病中医辨证分型与心肌纤维化的相关性

目的  探讨非缺血性心肌病(NICM)中医不同辨证分型与心脏容积、功能参数及心肌纤维化的相关性。方法  选择2019年9月至2020年10月南方医科大学顺德医院临床确诊为NICM患者64例。按中医辨证分型分为3组, 包括心血瘀阻证组、痰浊痹阻证组、非心血瘀阻非痰浊痹阻证组(包括心阳不振证、心肾阴虚证、气阴两虚证、寒凝心脉证)。所有患者行心脏磁共振检查(CMR), 扫描包括黑血序列、亮血序列及延迟增强扫描(LGE)。CMR亮血序列图像经后处理获得心脏容积和功能等参数, 包括左心室射血分数(LVEF)、左心室舒张末期容积指数(LVEDVI)、左心室收缩末期容积指数(LVESVI)、左心室每搏量(LVSVI)、左心室心排出量(LVCOI)及左心室质量指数(LVMMI)。LGE左心室图像按美国心脏协会(AHA)推荐分为17节段, 并根据心室壁异常强化的节段分布, 分为1~3级。对以上数据进行统计学分析。结果  痰浊痹阻证组与非心血瘀阻非痰浊痹阻证组LVEF比较, 差异有统计学意义(P < 0.05);痰浊痹阻证组与心血瘀阻证组、非心血瘀阻非痰浊痹阻证组LVEDVI比较, 差异有统计学意义(P < 0.05, P < 0.01);痰浊痹阻证组与非心血瘀阻非痰浊痹阻证组LVESVI比较, 差异有统计学意义(P < 0.01)。心血瘀阻证组与痰浊痹阻证组心肌纤维化程度比较, 差异有统计学意义(P < 0.05)。结论  NICM不同辨证分型与心脏容积、功能参数及心肌纤维化程度有一定相关性, 通过运用现代磁共振技术对中医辨证分型进行半定量化、定量化研究, 为其客观化研究提供了新思路, 为揭示中医学的本质提供了新方法。 

Exploring the Correlation between Syndrome Differentiation of Traditional Chinese Medicine of Non-Ischemic Cardiomyopathy and Myocardial Fibrosis Based on Cardiac MRI

OBJECTIVE  To investigate the correlation between syndrome differentiation of traditional Chinese medicine (TCM) of non-ischemic cardiomyopathy (NICM) and parameters of the cardiac volume and function, along with myocardial fibrosis.METHODS  We selected 64 patients clinically diagnosed with NICM from September 2019 to October 2020 at Shunde Hospital of Southern Medical University. The patients were divided into three groups according to TCM syndrome differentiation, including the syndrome of stasis obstructing the heat blood, syndrome of turbid phlegm obstruction, as well as the syndrome of neither stasis obstructing the heat blood nor turbid phlegm obstruction (heart yang insufficiency, heart-kidney yin deficiency, deficiency of both qi and yin, and cold congealing heart vessel). All patients underwent cardiac magnetic resonance (CMR), which includes black-blood sequence, bright-blood sequence, and late gadolinium enhancement (LGE). The CMR bright-blood sequence images were post-processed to obtain parameters of cardiac volume and function, including left ventricular ejection fraction (LVEF), left ventricular end-diastolic volume index (LVEDVI), left ventricular end-systolic volume index (LVESVI), left ventricular stroke volume index (LVSVI), left ventricular cardiac output index (LVCOI), and left ventricular mass index (LVMI). The LGE left ventricular images were divided into 17 segments according to the American Heart Association (AHA) recommendations and were classified into grades one to three according to the segmental distribution of abnormal ventricular wall enhancement. In addition, statistical analysis was performed on the above data.RESULTS  The differences were statistically significant (P < 0.05) when comparing the LVEF in the turbid phlegm obstruction group and neither stasis obstructing the heat blood nor turbid phlegm obstruction groups. The differences were statistically significant (P < 0.05, P < 0.01) when comparing the LVEDVI in the turbid phlegm obstruction group, the stasis obstructing the heat blood group, as well as neither stasis obstructing the heat blood nor turbid phlegm obstruction groups. The differences were statistically significant (P < 0.01) when comparing the LVESVI in the turbid phlegm obstruction group and neither stasis obstructing the heat blood nor turbid phlegm obstruction groups. The difference was statistically significant (P < 0.05) when comparing myocardial fibrosis degree in the stasis obstructing the heat blood group with the turbid phlegm obstruction group.CONCLUSION  The TCM syndrome differentiation of NICM has some correlation with parameters of the cardiac volume and function as well as myocardial fibrosis degree. Thus, this study provides new ideas for objective research and new methods for revealing the essence of Chinese medicine through the semi-quantitative and quantitative study of TCM syndrome differentiation combined with modern magnetic resonance technology.