Relationships between short-term blood-pressure fluctuations and heart-rate variability in resting subjects II: a simple model

Boer, R.W. de; Karemaker, John M.; Strackee, J.

doi:10.1007/bf02441590

Cited by 95 publications

(60 citation statements)

References 7 publications

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“…The relative value of each spectral power component was also measured and expressed in normalized units (NU). 9 -12,27 We calculated spontaneous baroreceptor sensitivity 28 with alpha (␣) indexes. 9,11,12,29,30 From the same 256-beat segment, we then calculated a time-domain index: the root mean squared of successive R-R intervals differences (RMSSD), an index that provides another marker of sinus vagal activity.…”

Section: Methodsmentioning

confidence: 99%

Influence of Vitamin C on Baroreflex Sensitivity in Chronic Heart Failure

et al. 2003

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Abstract-Chronic heart failure (CHF) reduces baroreflex sensitivity. Low baroreflex sensitivity, a risk factor for sudden death, could arise partly from CHF-dependent endothelial dysfunction. Vitamin C at high doses has a protective role against CHF-related endothelial damage. This study was conducted to investigate the effect of vitamin C on baroreflex sensitivity in CHF. A study group of 33 subjects with CHF secondary to postischemic dilated cardiomyopathy with an ejection fraction Յ35% and a control group (11 subjects) underwent assessment of baroreflex sensitivity by the phenylephrine method and an autonomic nervous system study by power spectral analysis. Variables were assessed after infusion of placebo and high doses of vitamin C (2.5 mg). In subjects with CHF, baroreflex sensitivity was significantly higher after vitamin C than after placebo infusion (placebo: 4.1Ϯ0.4 versus vitamin C: 5.3Ϯ0.5 ms/mm Hg, PϽ0.001). Low-frequency of R-R (LF RR)

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Section: Methodsmentioning

confidence: 99%

Influence of Vitamin C on Baroreflex Sensitivity in Chronic Heart Failure

et al. 2003

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“…The joint criteria of LF h >250 ms 2 Note that ACE-Is and β-blockers provide equally positive effect on dynamics of 0.1-Hz rhythms synchronization in HR and Table 6 Sh Se Table 6 Sh Se The total Se and Sp of our method was 65% and 73%, respectively [χ 2 =26.9, p=0.0005; OR=5.2 (95% CI 2.7-10.2)].…”

Section: Evaluation Of Antihypertensive Treatment Effect On 01-hz Rhmentioning

confidence: 91%

“…It is known that 0.1-Hz rhythms in the cardiovascular system (CVS) characterize the properties of its autonomic regulation (1)(2)(3). These rhythms are observed in heart rate (HR) (4-7), blood pressure (BP) (1,2,4,5,8) and photoplethysmogram (PPG) signals (1,2,(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

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Effects of antihypertensive treatment on cardiovascular autonomic control: a prospective study

Kiselev¹,

Gridnev²,

Прохоров³

et al. 2014

Anadolu Kardiyol Derg

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Objective: The aim of study was to propose an approach to the control of dynamics of autonomic dysfunction in cardiovascular system (CVS) under antihypertensive treatment (AT) in patients with arterial hypertension (AH), based on individual features of synchronization of 0.1-Hz rhythms in heart rate (HR) and photoplethysmogram (PPG) and spectral indices of heart rate variability (HRV). Methods: We designed prospective cohort diagnostic accuracy and studied 105 AH patients (66 females) aged 47±8 years during 8 weeks. The HRV spectral indices and the index S of synchronization between the 0.1-Hz rhythms in HR and PPG during a tilt test are compared in their ability to control the AT with angiotensin-converting enzyme inhibitors (ACE-Is) (fosinopril or enalapril) and β-blockers (atenolol or metoprolol). We apply Shapiro-Wilk, Mann-Whitney U and Wilcoxon tests. Results: It is shown that the power of low-frequency (LF) band in HRV spectrum and index S can be used as criteria for initial assessment of the status of autonomic regulation in AH patients. The patients with S<25% in vertical body's position and LF>250 ms 2 in horizontal body's position require ACE-Is treatment. The AH patients with LF<350 ms 2 and S<30% in vertical body's position require β-blocker treatment. The AH patients with S>25% and LF>250 ms 2 in horizontal body's position do not require any ACE-Is or β-blocker treatment. Both drug groups can be used in patients with low values of index S and low power of LF band in HRV spectrum. Conclusion: The control of AT can be carried out in AH patients taking into account the individual features of autonomic dysfunction in CVS. Sensitivity and specificity of our approach were 65% and 73%, respectively. (Anadolu Kardiyol Derg 2014; 14: 701-10)

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“…This is not a coincidence! According to deBoer's model [18][19][20][21] heart beat interval is determined by the tree factors: SBP, DBP, and the peripheral resistance. In this model, peripheral resistance is simulated by RC charging and discharging circuit, therefore, in the model, it is simply expressed by a time constant.…”

Section: Spectral Methods Of Hrvmentioning

confidence: 99%

Assessment of Parasympathetic Control of Blood Vessel by Pulsation Spectrum and Comparison With Spectral Method of Rr Intervals

Hsieh

Mao

Young

et al. 2003

Biomed. Eng. Appl. Basis Commun.

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A new pulse spectrum method of assessing autonomic function was examined in a pharmacological experiment on eight healthy volunteers. The pulse pressure data is obtained under control condition and in parasympathetic blocked by atropine. Compared with the spectral method of heart rate variability (HRV), which is wide-spreading in laboratory studies figure 1, which presents the reassessing cardiovascular autonomic regulation. [1][2][3][4] lationship between heart beat interval and ANS. [15-22] Numerous methods of quantifying heart rate variThe blood pressure (BP) value is sensed by the baroreability have been proposed. Among them, the standard ceptors, and accordingly, the central nervous system deviation, the coefficient of variation, and several indiadjusts the heart rate by both fast vagal action and by ces based on beat-to-beat variations calculated by usslower sympathetic action (baroreflex control of heart ing simple statistics have been used for assessment of rate). The baroreflex also affects the peripheral resistance via sympathetic efferent activity. The heart rate Received: Jan. 3,2003; Accepted: Feb. 8, 2003 influences the cardiac output, which together with the Correspondence: Ming-Shing Young, Professor peripheral resistance determines the value of BP. Department of Electrical Engineering, National Cheng HRV related to ANS has been quantified by conKung University, Tainan, Taiwan ventional techniques, such as power spectrum analysis E-mail: msyoung@mail.ncku.edu.tw that separates the power on the basis of frequency

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Relationships between short-term blood-pressure fluctuations and heart-rate variability in resting subjects II: a simple model

Cited by 95 publications

References 7 publications

Influence of Vitamin C on Baroreflex Sensitivity in Chronic Heart Failure

Influence of Vitamin C on Baroreflex Sensitivity in Chronic Heart Failure

Effects of antihypertensive treatment on cardiovascular autonomic control: a prospective study

Assessment of Parasympathetic Control of Blood Vessel by Pulsation Spectrum and Comparison With Spectral Method of Rr Intervals

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