| Objective:To investigate the correlation between geomagnetic activity and heart rate variability in patients with coronary heart disease in yunnan.Methods:① selection of the first affiliated hospital of kunming medical university of elderly heart internal medicine in March 2018 to March 2019 were confirmed by coronary angiography of 52 cases of coronary heart disease patients as the research object,combined with the data of yunnan observatory,all patients respectively in geomagnetic quiet period with geomagnetic activity for 24 hours dynamic electrocardiogram(ecg)monitoring and pay close attention to the subject of the index,the heart rate variability(HRV)time-domain comparative observation;②during the same period were selected by coronary angiography to rule out of coronary heart disease(CHD)of 131 cases of healthy people as the research object,combined with the data of yunnan observatory,83 cases were selected in geomagnetic quiet period and 48 cases in geomagnetic activity 24 small tense electrocardiogram inspection,the analysis under the condition of different geomagnetic intensity effect on heart rate variability index.③ fifty-two patients diagnosed with coronary heart disease admitted to the department of geriatric cardiology of the first affiliated hospital of kunming medical university from March 2018 to March 2019 were selected as the study group,and 83 healthy patients in the same period were selected as the control group.The parameters of heart rate variability examination of the two groups were compared and observed.Results:① geomagnetic condition:from March 2018 to March 2019,the geomagnetic field was in the active phase(Kp value 5)for 22 days,with an average annual incidence of 6.03%;② in patients with coronary heart disease:compared with normal heart rate variability in patients with coronary heart disease and controls A heart rate variability index in front of the geomagnetic variation is:through the comparison shows that coronary heart disease in the whole process of the group of normal RR interphase criteria(SDNN),24 h adjacent normal RR q phase difference between the square root of mean square(RMSSD),between adjacent normal RR mean standard deviation(SDANN)significantly lower than the control group(P<0.05).③The effect of geomagnetic activity on heart rate variability in patients with coronary heart disease:through comparison,SDNN,TRI,SDANN in the geomagnetic activity phase were all lower than that in the geomagnetic quiet phase(P<0.05),and the decrease of SDNN in each parameter was more obvious.④Influencing factors of heart rate variability:diabetes mellitus had a significant effect on heart rate variability,and the difference was statistically significant(P<0.05).Conclusions:①the SDNN,RMSSD and SDANN in the heart rate variability indexes of healthy population in yunnan region are all higher than those of CHD patients in yunnan region when the geomagnetic field is quiet.This conclusion is consistent with domestic and foreign studies.Heart rate variability is an independent predictor of coronary artery damage in CHD.② patients after space weather cause geomagnetic variation,the index of heart rate variability SDNN,TRI,SDANN are below the geomagnetic quiet period(P<0.05),suggesting that the space weather led to the geomagnetic variation after further induce cardiac autonomic nerve function damage and prompt space weather could cause geomagnetic variation induced acute coronary heart disease.③ there was no significant difference in heart rate variability indexes between the healthy control group and the control group before and after the geomagnetic change caused by spatial weather,indicating that the effect of geomagnetic change caused by spatial weather on heart rate variability only occurred in the case of coronary artery lesions,which is a risk factor for the acute incidence of coronary heart disease.④ combined with regression analysis,it was shown that heart rate variability of CHD patients in yunnan was not only affected by diabetes,but also correlated with geomagnetic activity.The SDNN,TRI and SDANN in the indicators of heart rate variability of patients with coronary heart disease in the geomagnetic activity phase were significantly lower than those in the non-geomagnetic activity phase,suggesting that geomagnetic changes may affect the autonomic nervous function of patients with coronary heart disease and further aggravate the condition of patients with coronary heart disease. |
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