Heart rate variability, indicators of Kaplan indices in healthy dogs

2021 ◽  
pp. 97-100
Author(s):  
E. S. Litvinov ◽  
T. V. Ippolitova
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Resting State ◽  
Normal Values ◽  
Heart Diseases ◽  
Integrated Approach ◽  
Asymmetric Distribution ◽  
Basic Set ◽  
Healthy Dogs ◽  
Respiratory Modulation

The study of indicators of Kaplan indices in dogs has not been previously conducted and their normal values are not described in the available literature. Given the subtlety of the mechanisms of autonomic regulation of the heart, there is a need to expand the diagnostic base for very common heart diseases in dogs.The aim of the research is to study the Kaplan indices in dogs to assess the possibility of including them in an integrated approach to the analysis of the functioning of the heart in dogs. 74 healthy dogs were examined. The dependence of changes in the Kaplan indices on age was studied. An asymmetric distribution of Kaplan indices in the studied group of dogs was established. Intervalograms were recorded using a computerized polygraphic amplifier "MKS KARDi2-NP" (Russia). Recording was performed on dogs in a resting state, standing or sitting. To analyze the obtained intervalograms, to obtain the values of the Kaplan indices, the integrated instrumental-methodological complex "CONAN" was used.The following Kaplan indices have been studied: Respiratory modulation index (IDM); Sympathoadrenal Tone Index (SAT); Slow-wave arrhythmia index (IMA).The normal values of Kaplan's indices were established: IDM, SAT, IMA for dogs. In this regard, the assessment of these indices should be included in the basic set of methods for diagnosing heart disease in dogs. The absence of dependence of changes in indices on age in dogs was found. The lack of research on Kaplan indices requires additional research in groups of different weight on a representative sample.

Heart rate variability interacts with recovery of resting-state connectivity in amygdala circuitry and the persistence of symptoms after sport-related concussion

Neurology ◽  
2020 ◽  
Vol 95 (20 Supplement 1) ◽  
pp. S15.2-S16
Author(s):  
Kevin Bickart ◽  
Christopher Andrew Sheridan ◽  
Corey M. Thibeault ◽  
Robert Hamilton ◽  
James LeVangie ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Resting State ◽  
Autonomic Function ◽  
Network Connectivity ◽  
Resting State Fmri ◽  
Network Recovery ◽  
Symptom Persistence ◽  
Resting State Connectivity ◽  
Over Time

ObjectiveWe investigated longitudinal trajectories of resting-state fMRI (rsfMRI), autonomic function, and graded symptoms after sport-related concussion (SRC).BackgroundLimbic circuitry may be particularly vulnerable to traumatic brain injury, which could explain the affective and autonomic dysfunction that some patients develop. Relatively few studies have performed longitudinal rsfMRI analyses in concussion and fewer have combined imaging with autonomic and symptom data. We leveraged published limbic rsfMRI networks centered on the amygdala that include core affective and autonomic structures to test whether athletes with SRC would have altered connectivity, and that network recovery would be related to measures of autonomic function and symptom persistence.Design/MethodsWe compared rsfMRI connectivity of amygdala networks in college athletes with SRC (N = 31, female = 14) at three time points after concussion (T1 = 4 days, T2 = 10–14 days, T3 = 2–3 months) and matched controls with no concussion (in-sport control [ISC] N = 36, female = 17).ResultsSRCs show greater amygdala network connectivity as compared to ISCs (T1 p = 0.003, T2 p = 0.014) that normalizes over time (T3 p = 0.182). However, SRCs with higher versus lower heart rate variability (HRV), as measured by pNN50 at T1, have opposing trajectories of connectivity. That is, SRCs with higher HRV have connectivity that starts high and normalizes over time (T1 p = 0.001, T2 p = 0.055, T3 p = 0.576) whereas SRCs with lower HRV have connectivity that increases over time (T1 p = 0.429, T2 p = 0.050, T3 p = 0.002). Furthermore, SRCs with greatest connectivity at T3, presumably the least recovered, have the most symptoms on the Graded Symptom Checklist at ∼3 months (r = 0.635, p = 0.001).ConclusionsHeightened connectivity of amygdala circuitry acutely after a concussion and its normalization over time may be protective, and with HRV, may be a biomarker of symptom persistence.

Depression and resting state heart rate variability in children and adolescents — A systematic review and meta-analysis

2016 ◽  
Vol 46 ◽  
pp. 136-150 ◽  
Author(s):  
Julian Koenig ◽  
Andrew H. Kemp ◽  
Theodore P. Beauchaine ◽  
Julian F. Thayer ◽  
Michael Kaess
Keyword(s):  
Systematic Review ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Children And Adolescents ◽  
Resting State ◽  
Meta Analysis

scholarly journals Normal Values of Corrected Heart-Rate Variability in 10-Second Electrocardiograms for All Ages

2018 ◽  
Vol 9 ◽  
Author(s):  
Marten E. van den Berg ◽  
Peter R. Rijnbeek ◽  
Maartje N. Niemeijer ◽  
Albert Hofman ◽  
Gerard van Herpen ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Normal Values

Power Spectral Analysis of Heart Rate Variability: Normal Values of Subjects over 60 Years Old

2008 ◽  
Vol 118 (8) ◽  
pp. 1165-1173 ◽  
Author(s):  
Ufuk Ergün ◽  
Mehmet Demirci ◽  
Gülay Nurlu ◽  
Ferhan Komürcü
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Normal Values ◽  
Power Spectral Analysis ◽  
Power Spectral

scholarly journals Heart Rate Variability during Chronic Hemodialysis and after Renal Transplantation

1999 ◽  
Vol 10 (9) ◽  
pp. 1972-1981
Author(s):  
DVORA RUBINGER ◽  
DAN SAPOZNIKOV ◽  
ARTHUR POLLAK ◽  
MORDECAI M. POPOVTZER ◽  
MYRON H. LURIA
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Renal Transplantation ◽  
Heart Diseases ◽  
Low Frequency ◽  
Hemodialysis Patients ◽  
Chronic Hemodialysis ◽  
Systemic Amyloidosis ◽  
Humoral Factors ◽  
Uremic Patients

Abstract. The present study was undertaken to compare heart rate variability (HRV) values in patients on maintenance hemodialysis with no evidence of ischemic or hypertensive heart diseases to those of age- and gender-matched healthy individuals and those of patients after renal transplantation. To assess the effects of a common confounding factor, HRV values were also determined in patients with systemic amyloidosis, in chronic hemodialysis, and after successful renal transplantation. Spectral analyses of RR intervals from continuous electrocardiogram recordings were performed to quantify ultra low frequency, very low frequency, low frequency, and high frequency powers. HRV determinations were all significantly reduced in uremic patients undergoing hemodialysis compared with the healthy control subjects, especially in those with systemic amyloidosis. Renal transplantation normalized HRV in most patients; HRV, however, remained reduced in isolated amyloidosis patients with cardiac or adrenal involvement. HRV circadian day/night differences were preserved in hemodialysis patients and after renal transplantation in those without amyloidosis but not in those with amyloidosis. These data suggest that reduced HRV in chronic hemodialysis patients may precede other manifestations of cardiovascular disease. In uremic patients with amyloidosis, a more severe form of autonomic failure may occur. Successful transplantation corrects HRV abnormalities in most patients, suggesting that the autonomic dysfunction of uremia is caused by humoral factors reversed by the normalization of the renal function.

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