不同妊娠状态伊犁马心率变异性变化规律研究

doi:10.16431/j.cnki.1671-7236.2022.10.025

Abstract

Abstract: 【Objective】 To study the changes of heart rate variability (HRV) between aborted Yili horse and normal delivery Yili horse during pregnancy,so as to prevent adverse pregnancy outcomes.【Method】 21 Yili horses (5 aborted and 16 delivered normally) with pregnancy for 29 weeks and 7 Yili horses non-pregnancy were selected in the third trimester of pregnancy,24-hour heart rate variability (HRV) was collected at the 30th gestational week in the second trimester,the 45th gestational week in the third trimester as well as 1 day before and after delivery.Including time domain indexes:Mean of all R-R intervals (Mean RR),standard deviation of R-R intervals (SDNN),mean heart rate (Mean HR),root mean square of successive differences (RMSSD),normal- normal intervals that differ by＞50 ms in the total number of RR intervals (NN50) and percentage of normal- normal intervals that differ by＞50 ms in the total number of RR intervals (pNN50);Frequency domain index:very low frequency (VLF),low frequency power (LF) and high frequency power (HF);Nonlinear index:Standard deviation of all R-R spacing (Y) (SD1) and standard deviation of all R-R spacing (X) (SD2).【Result】 In time domain indexes,Mean RR,SDNN,RMSSD,NN50 and pNN50 in abortion group and normal delivery group were extremely significantly or significantly lower than those in non-pregnancy group (P＜0.01;P＜0.05),Mean HR was extremely significantly higher than that in abortion group and normal delivery group (P＜0.01).In frequency domain indexes,HF and LF in abortion group and normal delivery group were extremely significantly lower than those in non-pregnant group (P＜0.01),VLF in abortion group and non-pregnant group were extremely significantly higher than that in normal delivery group (P＜0.01).In the nonlinear indexes,SD1 and SD2 in abortion group and normal delivery group were extremely significantly or significantly lower than those in non-pregnant group (P＜0.01;P＜0.05),SD2/SD1 in normal delivery group was extremely significantly higher than that in abortion group and pregnant group (P＜0.01).【Conclusion】 HRV of Yili horses fluctuated in different gestational states.Mean HR,Mean RR and SD2/SD1 values increased in pregnant mares.The parasympathetic nerve dominated the mare during gestation,and the autonomic nervous system was inhibited.The VLF index of aborted mares increased.Before and after the occurrence of abortion sympathetic nerves dominate,the autonomic nervous system produces excitement.

Key words: Yili horse; pregnant state; heart rate variability(HRV)

CLC Number:

S821.3⁺5

YUAN Xinxin, MENG Jun, YAO Xinkui, ZENG Yaqi, WANG Jianwen, WANG Chuankun, REN Wanlu, WANG Tongliang. Study on the Change Pattern of Heart Rate Variability of Yili Horse in Different Pregnancy States[J]. China Animal Husbandry and Veterinary Medicine, 2022, 49(10): 3925-3931.

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Study on the Change Pattern of Heart Rate Variability of Yili Horse in Different Pregnancy States

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