康可对糖尿病自主神经病变者心率变异性的影响

目的：通过比较糖尿病自主神经病变者服用康可前后HRV的变化，以了解康可对HRV的影响。方法：对50例糖尿病自主神经病变的病人在康可治疗前后用动态心电图时域分析法对HRV各项指标进行检测，并与对照组50例进行比较。结果：与对照组比较，代表心率变异程度的SDNN、rMSSD、pNN50均明显下降。治疗组用药后与用药前比较显示，HRV的SDNN、rMSSD、pNN50均有所升高。结论：糖尿病合并自主神经病变者HRV降低，康可能提高心率变异性，改善预后。     

高血压对2型糖尿病患者心脏自主神经病变的影响

目的 探讨高血压对2型糖尿病患者心脏自主神经病变的影响。方法 应用短时程心率变异性分析(Heart rate variability，HRV)，对70例糖尿病患者及71例正常对照组测定了HRV，并与有关影响因素作相关分析。结果 糖尿病患者各年龄组的心率变异时域分析指标参数均较对照组降低，HRV与年龄、糖尿病病程、高血压病程呈显著负相关。结论 心脏自主神经病变为2型糖尿病常见的并发症，高血压是加重心脏自主神经病变的因素之一。     

糖尿病患者的心率变异性分析

目的：了解糖尿病患者的自主神经功能，初步探讨心率变异性分析（HRV）在糖尿病心脏病变中的应用。方法：对60例糖尿病患者进行24小时动态心电图时域指标分析。结果：糖尿病患者SDNN，SDANN，SDNN指数，PNN50指标均低于正常人。结论：糖尿病患者的心率变异性降低，反映自主神经功能减退，HRV降低可作为病糖心脏病的一个独立的预测指标。     

II型糖尿病患者心率变异性分析

目的：了解53例II型糖尿病（NIDDM）和50例正常对照者的心率变异性（HRV）的临床意义，方法：应用24小时动态心电图心率变异频谱分析检查II型糖尿病合并或不合并心脏自主神经病变（ANP）的患者，结果：II型糖尿病24小时R－R间期标准差（SDNN）(ms),相临正常R－R间期差值超过50ms的百分数（PNN50）显著低于正常人，II型糖尿病组R－R间期的总能，高，低频段的幅度均明显低于正常人，结论：HVR是糖尿病心脏自主神经病变（ANP）最敏感而又有效的方法之一。     

动态心电图在评价2型糖尿病患者心脏自主神经功能中的临床意义表达

探究动态心电图在评价2型糖尿病患者心脏自主神经功能中的临床意义。选取我院和市二院112例2型糖尿病(T2DM)患者,按照传统心血管自主神经功能检查结果分为阴性组73例和阳性组39例。以动态心电图测定两组心脏变时功能、心率震荡(HRT)及心率变异(HRV)等指标水平,分析检测结果。结果阳性组的全天最慢心率高于阴性组,最快心率低于阴性组,最快、最慢心率差值小于阴性组,差异有统计学意义(P0.05);阳性组全程相邻R-R间期差值的均方根值(r MSSD)、全部正常窦性心搏R-R间期的标准差(SDNN)及5min心搏间期均值的标准差(SDANN)等HRV指标低于阴性组,差异有统计学意义(P0.05);阳性组HRT中震荡斜率(TS)值低于阴性组,差异有统计学意义(P0.05),但震荡初始(TO)值组间对比,差异无统计学意义(P0.05)。采用动态心电图对2型糖尿病患者心脏变时功能、心率震荡及心率变异等指标进行记录,能有效评价其心脏自主神经功能。     

重组人脑利钠肽对急性失代偿性心力衰竭患者心率变异性的影响

目的:观察重组人脑利钠肽(rhBNP)对急性失代偿性心力衰竭(ADHF)患者心率变异性(HRV)的影响.方法:本院60例心力衰竭住院患者随机分为对照组和新活素组.所有患者治疗前后进行24 h动态心电图检查心率变异性.结果:治疗后,新活素组全部窦性R-R间期的标准差(SDNN)、每5 min窦性R-R平均值的标准差(SDANN)、全部窦性R-R间期差值的均方根(rMSSD)、相邻两正常窦性R-R间期差值＞50 ms的个数所占的百分率(PNN50)、低频功率(频率为0.04～ 0.15 Hz,LF)、高频功率(频率为0.15 ～ 0.40 Hz,HF)较对照组显著增加(P＜0.05).结论:rhBNP加心衰常规治疗,能显著改善HRV,从而改善患者的自主神经的平衡性和预后.     

职业性哮喘患者心率变异性分析研究

目的 观察职业性哮喘患者心率变异性(heart rate variability,HRV),从而了解职业性哮喘患者自主神经功能的变化.方法 对33例职业性哮喘患者和31例健康者分别进行了短程心率变异性分析,并对两组5 min所有窦性心率R-R间期标准差(SDNN)、正常相邻R-R间期差值均方根(RMSSD)比较.结果 SDNN、RMSSD哮喘组明显降低,与对照组比较差异有显著意义(P<0.05).结论职业性哮喘患者存在自主神经功能紊乱,HRV可作为判断职业性哮喘患者的自主神经功能损害的参考指标.     

职业性哮喘患者心率变异性分析研究

目的 观察职业性哮喘患者心率变异性(heart rate variability,HRV),从而了解职业性哮喘患者自主神经功能的变化.方法 对33例职业性哮喘患者和31例健康者分别进行了短程心率变异性分析,并对两组5 min所有窦性心率R-R间期标准差(SDNN)、正常相邻R-R间期差值均方根(RMSSD)比较.结果 SDNN、RMSSD哮喘组明显降低,与对照组比较差异有显著意义(P<0.05).结论职业性哮喘患者存在自主神经功能紊乱,HRV可作为判断职业性哮喘患者的自主神经功能损害的参考指标.     

职业性哮喘患者心率变异性分析研究

目的 观察职业性哮喘患者心率变异性(heart rate variability,HRV),从而了解职业性哮喘患者自主神经功能的变化.方法 对33例职业性哮喘患者和31例健康者分别进行了短程心率变异性分析,并对两组5 min所有窦性心率R-R间期标准差(SDNN)、正常相邻R-R间期差值均方根(RMSSD)比较.结果 SDNN、RMSSD哮喘组明显降低,与对照组比较差异有显著意义(P<0.05).结论职业性哮喘患者存在自主神经功能紊乱,HRV可作为判断职业性哮喘患者的自主神经功能损害的参考指标.     

氩激光联合胰激肽释放酶治疗增殖前期糖尿病视网膜病变疗效分析

目的：观察氩激光联合胰激肽释放酶治疗增殖前期糖尿病视网膜病变的疗效。方法：将61例83眼确诊为增殖前期糖尿病视网膜病变的患者随机分为2组。单纯氩激光组在给予全视网膜激光光凝治疗,氩激光联合胰激肽释放酶组（综合组）光凝后给予口服胰激肽释放酶3个月。术后3个月比较两组视力及眼底变化情况。结果：两组视力及眼底情况均有明显改善,其中综合组优于单纯氩激光组,且有统计学意义（P〈0．05）。结论：氩激光光凝是治疗增殖前期糖尿病视网膜病变安全有效的方法,胰激肽释放酶是一种相对安全和有效的治疗增殖前期糖尿病视网膜病变激光术后的药物。     

老年冠心病合并2型糖尿病患者心率变异性分析研究

目的探讨心率变异性对冠心病、冠心病合并2型糖尿病心脏自主神经病变的意义。方法选择40例冠心病患者、36例冠心病合并2型糖尿病患者和30例健康人进行24 h动态心电图记录,分析比较。结果 A组(冠心病)、B组(冠心病并发糖尿病)患者R-R间期总体标准差(SDNN)、平均值标准差(SDANN)、标准差的平均值(SDN-Nindex)、平方根(RMSSD)、总R-R间期数的百分比(PNN50%)较C组(正常对照)均有显著性差异(P<0.05);B组与A组比较有显著性差异(P<0.05)。结论冠心病或合并2型糖尿病患者心率变异性检查可作为衡量其心脏自主神经损害的一个有效的无创方法,此方法不仅能够准确反映患者自主神经功能及其损害情况,并可对其损害程度进行初步判断、评估,为临床诊疗提供理论依据。     

2型糖尿病患者心率变异性与尿白蛋白排泄率的关系

目的探讨2型糖尿病患者心率变异性（HRV）与尿白蛋白排泄率（UAER）的相关性。方法将90例2型糖尿病患者按照UARE不同分为糖尿病正常自蛋白尿组（N组，51例），糖尿病微量白蛋白尿组（胁组，25例），糖尿病大量白蛋白尿组（Ma组，14例），并且选取正常健康人30例作为对照组（C组，30例），用24h动态心电图分析其HRV，检测其自主神经功能。结果（1）糖尿病各组的全程内相邻正常窦性心率R—R间期的标准差（SDNN）、全程内每5minR～R间期均值的标准差（SDANN）明显低于正常对照组，且Mi组显著低于N组，Ma组明显低于Mj组（P〈0．05）。（2）N组和Mi组的全程内每5minR—R间期标准差的平均值（SDNNI）、相邻正常R—R间期差值的均方根（rMSSD）、相邻正常R—R间期相差〉50ms的个数占总心跳次数的百分比（PNN50）与C组相比无显著差别，但Ma组较C组显著降低（P〈0.01）。结论糖尿病患者随着尿白蛋白排泄率增加，自主神经损害加重。     

Heart rate variability and its determinants in patients with severe or mild essential hypertension

How cardiac autonomic nervous control is related to the severity of essential hypertension in patients receiving long‐term antihypertensive therapy is not well known. The aim of this study was to examine heart rate variability (HRV), a non‐invasive measure of cardiac autonomic function, in patients with long‐term and medically treated mild and severe essential hypertension and healthy control subjects, and to assess the clinical determinants of HRV in these patients. Thirty‐four patients with severe essential hypertension (SEHT) and 29 with mild essential hypertension (MEHT) as well as healthy age‐ and sex‐matched control subjects were studied. HRV was assessed from 10 min ECG‐recordings during paced (0·2 Hz) breathing at rest and expressed as time and frequency domain measures. In the SEHT group time (SDNN, RMSSD) and frequency domain measures (total power, low‐frequency (LF) power and high‐frequency (HF) power of HRV in absolute units, and LF and HF power of HRV in normalized units) of HRV were significantly lower when compared with those of the control group. The MEHT and control groups did not differ from each other with respect to time or frequency domain measures of HRV. Comparison between the hypertensive groups showed that SDNN, total power, LF power and HF power were lower in the SEHT group compared with the MEHT group (P<0·05 for all). Among hypertensive patients RR‐interval, age, gender, systolic finger blood pressure and diastolic office blood pressure as well as 24‐h blood pressure were significant determinants of HRV. In conclusion, we found that the severity of chronic essential hypertension seems to be related to the severity of impairment of cardiac autonomic control.     

Heart rate variability in diabetes patients

Diabetes mellitus can cause cardiovascular autonomic neuropathy and is associated with increased cardiovascular deaths. We investigated cardiovascular autonomic neuropathy in diabetics and healthy controls by analysis of heart rate variability. Thirty-one diabetics and 30 age- and sex-matched controls were included. In the time domain we measured the mean R - R interval (NN), the standard deviation of the R - R interval index (SDNN), the standard deviation of the 5-min R - R interval mean (SDANN), the root mean square of successive R - R interval differences (RMSSD) and the percentage of beats with a consecutive R - R interval difference > 50 ms (pNN50). In the frequency domain we measured high-frequency power (HF), low-frequency power (LF) and the LF/HF ratio. Diabetes patients had lower values for time-domain and frequency-domain parameters than controls. Most heart rate variability parameters were lower in diabetes patients with chronic complications than in those without chronic complications.     

Impaired cardiac autonomic function in women with prior gestational diabetes mellitus

BACKGROUND: Cardiac autonomic neuropathy is a common dysfunction in manifest diabetes mellitus and is associated with duration of diabetes and/or an inadequate glycaemic control. Heart rate variability (HRV) reflects autonomic heart function. The aim of the present study was to investigate whether in women with prior gestational diabetes (GD; pre-type 2 diabetes) alterations of cardiac autonomic function can be observed after delivery in relation to insulin sensitivity and glycaemic control. MATERIALS AND METHODS: Forty-eight healthy women with prior GD were consecutively admitted to the study. HRV was analysed by both time, as well as frequency, domain methods using 24-h Holter monitoring. In addition, 20 women with normal glucose tolerance during and after pregnancy were investigated as control subjects. All women underwent a frequently sampled intravenous glucose tolerance test (FSIGT) for measurement of insulin sensitivity. RESULTS: Time domain analysis (standard deviation of normal RR intervals; SDNN) showed a reduced HRV in 25 out of the 48 (52%) women with prior GD. Frequency domain analysis revealed that in these 25 subjects both low and high frequency components of power spectral density (reflecting mainly sympathetic respectively parasympathetic activity) were reduced, indicating that sympathetic as well as parasympathetic functional impairment may be assumed. However, a relative predominance of the sympathetic over parasympathetic cardiac function was observed. The impairment of cardiac autonomic function (reduced SDNN) was correlated with HbA1c values and the 2-h blood glucose concentration (oral glucose tolerance test) but not with insulin sensitivity. CONCLUSION: The present results demonstrate that in 52% of the women examined who had prior GD, an impairment of cardiac sympathetic as well as parasympathetic function was present, which related to glycaemic control, but not to insulin sensitivity. This infers that functional autonomic changes could be an early prognostic indicator in pre-type 2 diabetes.     

Cardiac autonomic dysfunction in diabetic children.

OBJECTIVE: Adults with type 1 diabetes may have abnormal alterations in heart rate variability (HRV) due to cardiac autonomic neuropathy. This prospective study was performed to determine whether HRV can be used to detect subclinical autonomic neuropathy in diabetic children. RESEARCH DESIGN AND METHODS: We examined five time domain and three frequency domain HRV indices determined from 24-h Holter recordings in 73 diabetic children and adolescents aged 3-18 years (mean 12.1 years) with a mean duration of diabetes of 55 months. The measures were compared with normal ranges. Z scores were established for each parameter and were compared with classic risk factors of other diabetic complications. RESULTS: Most HRV indices were significantly depressed in children aged > or = 11 years, and the levels of HRV abnormalities were significantly correlated with long-term metabolic control (mean GHb for 4 years) in that age-group. In younger patients, HRV indices were within the normal range and were not correlated with the level of metabolic control. Illness duration and microalbuminuria but not short-term metabolic control (most recent GHb) were also independently predictive of HRV abnormalities. CONCLUSIONS: These results suggest that early puberty is a critical period for the development of diabetic cardiac autonomic dysfunction. Therefore, all type 1 diabetic patients should be screened for this complication by HRV analysis beginning at the first stage of puberty regardless of illness duration, microalbuminuria, and level of metabolic control.     

高血压病人心率变异性研究

目的 :探讨高血压病人心率变异性的特点 ,为护理提供依据。方法 :对 10 2例原发性高血压病人 (EH组 )和 66例健康对照组进行 2 4h心率变异性分析。结果 :EH组时域和频域分析各项指标均减低 ;高血压病人自主神经 2 4h昼夜变化与正常人有差异 ,变频部分夜间明显减低 (P <0 .0 5 ) ;高血压伴糖尿病与无糖尿病者、高血压伴心肌缺血与无心肌缺血者之间高频 /低频比值差异有统计学意义 (P <0 .0 5 )。结论 :高血压病人心率谱 (PSD)昼夜分布与正常人明显不同 ,高血压伴心肌缺血者交感神经活力降低 ,伴糖尿病时交感神经和迷走神经均受损     

Effect of diabetes mellitus on heart rate variability in patients with congestive heart failure

This study sought to determine if the severity of autonomic perturbations in patients with heart failure are affected by the presence of diabetes. Decreased HRV is frequent in diabetic patients free of clinically apparent heart disease and has been invoked as a risk factor for sudden cardiac death. However, reduced HRV is also commonly present in patients with left ventricular dysfunction. The effect of diabetes on autonomic dysfunction in this setting is not known. Holter ECGs from 69 diabetic patients and 85 nondiabetic control subjects with heart failure were analyzed. The severity of autonomic dysfunction was assessed using 24-hour time- and frequency-domain HRV analysis. Prognostically important time- and frequency-domain HRV measures (SDNN, SDANN5, total power, and ultra-low frequency power) were not different between the two groups. Time- and frequency-domain parameters modulated by parasympathetic tone (pNN50, RMSSD, and HF power) were depressed to a similar degree in the diabetic and the nondiabetic groups. The low frequency power was significantly lower in diabetic patients (5.8 +/- 0.7 vs 5.3 +/- 1.0, P = 0.02). The ratio of low to high frequency power was substantially lower in the diabetic group (2.2 +/- 0.2 vs 1.4 +/- 0.2, P < 0.0001). These differences were more apparent in insulin-treated diabetics. In the presence of heart failure, HRV parameters that are most predictive of adverse outcome are similar in diabetic and nondiabetic patients. Furthermore, during increased sympathetic stimulation in the setting of heart failure, diabetes does not worsen parasympathetic withdrawal but may mitigate sympathetic activation.     

Impaired autonomic function is associated with increased mortality, especially in subjects with diabetes, hypertension, or a history of cardiovascular disease: the Hoorn Study

OBJECTIVE: Measures of baroreflex sensitivity, heart rate variability (HRV), and the classical Ewing test parameters are currently used for the diagnosis of diabetic autonomic neuropathy and for mortality risk stratification after myocardial infarction. However, the strengths of the associations of these measures of autonomic function with risk of mortality have never been compared in one study population. Furthermore, no evidence is available on the possible effect of glucose tolerance on these associations. RESEARCH DESIGN AND METHODS: The study population (n = 605) consisted of a glucose tolerance-stratified sample from a general population (50-75 years of age). Cardiac cycle duration and continuous finger arterial pressure were measured under two conditions: at rest and on metronome breathing. From these readings, seven parameters of autonomic function were assessed (one Ewing, five HRV, and one baroreflex sensitivity). RESULTS: During 9 years of follow-up, 101 individuals died, 43 from cardiovascular causes. Subjects with diabetes and low levels of the autonomic function parameters, indicating impaired autonomic function, had an approximately doubled risk of mortality. This association was consistent, though not statistically significant, for all parameters. The elevated risk was not observed in subjects without diabetes, hypertension, or prevalent cardiovascular disease. CONCLUSIONS: Impaired autonomic function is associated with all-cause and cardiovascular mortality. Moreover, the results of the present study suggest that cardiac autonomic dysfunction in patients already at risk (diabetes, hypertension, or history of cardiovascular disease) may be especially hazardous.     

肥胖型2型糖尿病患者心率变异性临床分析

目的观察肥胖型2型糖尿病患者和健康体检者心率变异性(heart rate variability,HRV)的差异。方法选取2012年9月—2013年9月我院门诊和住院部收治的肥胖型2型糖尿病50例作为观察组,另选择同期健康体检者60例作为对照组,进行24 h动态心电图监测,收集并比较HRV时域指标和频域指标。结果观察组HRV时域指标和频域指标各参数均显著低于对照组,差异有统计学意义(P0.05或P0.01)。结论肥胖型2型糖尿病患者时域指标和频域指标各参数均较健康体检者降低,提示自主神经功能明显受损。