川崎病患儿心率变异性与冠状动脉损害的相关性研究

目的 探讨川崎病(KD)患儿的心率变异性(HRV)指标与肌钙蛋白I(cTnI)和氨基末端脑钠肽前体(NT-proBNP)的相关性及其在预后中的应用价值。方法 将130 例KD 患儿分为冠状动脉损害组(n=47, CAL 组)和无CAL 组(n=83, NCAL 组), 同期选取110 例健康儿童为对照组, 29 例非心血管疾病恢复期患儿为非KD 组。各组儿童均行长程HRV 指标检测及分析。检测KD 组及非KD 组患儿血清NT-proBNP 及cTnI 水平。结果 同年龄性别KD 组患儿正常窦性N-N 间期标准差(SDNN)、相邻N-N 间期标准差的平均值(SDNNindex)、相邻N-N 间期之差>50 ms 的心搏数占心搏总数的百分数(PNN50)、极低频功率(VLF)、低频功率(LF)和高频功率(HF)值较对照组均明显下降, LF/HF 值较对照组升高(P<0.05)。CAL 组SDNN、全部记录中每5 min N-N 间期平均值的标准差(SDANN)、SDNNindex、相邻N-N 间期差值的均方根值(rMSSD)、PNN50、VLF、LF 和HF 值均低于对照组和非KD 组, LF/HF 值高于对照组(P<0.05)。CAL 组及NCAL 组的cTnI 和NT-proBNP 水平均高于非KD 组(P<0.05)。KD 患儿cTnI 与SDNN、HF 呈负相关, 与LF/HF 呈正相关(P<0.05);NT-proBNP 与SDNN、SDANN、HF 呈负相关(P<0.05)。结论 HRV 指标对KD 患儿的CAL 判断具有一定的临床意义。

Relationship between heart rate variability and coronary artery lesion in children with Kawasaki disease

Objective To explore the correlation of heart rate variability (HRV) indices with cardiac troponin I (cTnI) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) in children with Kawasaki disease (KD) and their prognostic value. Methods A total of 130 children with KD were assigned into coronary artery lesion (CAL) group (n=47) and non-coronary artery lesion (NCAL) group (n=83). Meanwhile, 110 healthy children and 29 children in the recovery stage of non-cardiovascular diseases were selected as control and non-KD groups, respectively. Patients in the four groups received 24-hour HRV monitoring. Levels of serum cTnI and NT-proBNP were measured in the KD and the non-KD group. Results Compared with the controls of the same sex and age, the KD patients had significantly reduced standard deviation of all normal sinus RR intervals (SDNN), mean of SDNN (SDNN index), percentage of successive normal sinus RR intervals >50 ms (pNN50), very low frequency (VLF), low frequency (LF), and high frequency (HF) but a significantly increased LF/HF ratio (P<0.05). The HRV indices including SDNN, standard deviation of all mean 5-minute RR intervals (SDANN), SDNN index, root mean squared successive difference, pNN50, VLF, LF, and HF in the CAL group all significantly decreased compared with those in the control and non-KD groups, while the LF/HF ratio was higher in the CAL group than in the control group (P<0.05). The serum levels of cTnI and NT-proBNP in the CAL and NCAL groups were significantly higher than those in the non-KD group (P<0.05). In children with KD, serum cTnI level was negatively correlated with SDNN and HF but positively correlated with the LF/HF ratio (P<0.05); serum NT-proBNP level was negatively correlated with SDNN, SDANN, and HF (P<0.05). Conclusions HRV indices have certain clinical significance in assessing CAL of children with KD.