scholarly journals Consciously Controlled Breathing Decreases the High-Frequency Component of Heart Rate Variability by Inhibiting Cardiac Parasympathetic Nerve Activity

2014 ◽  
Vol 233 (3) ◽  
pp. 155-163 ◽  
Author(s):  
Konosuke Sasaki ◽  
Ryoko Maruyama
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Frequency Component ◽  
High Frequency Component ◽  
Nerve Activity ◽  
Parasympathetic Nerve ◽  
Controlled Breathing

scholarly journals Impact of Heart Rate Fragmentation on the Assessment of Heart Rate Variability

2020 ◽  
Vol 10 (9) ◽  
pp. 3314 ◽  
Author(s):  
Junichiro Hayano ◽  
Masaya Kisohara ◽  
Norihiro Ueda ◽  
Emi Yuda
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Functional Assessment ◽  
High Frequency ◽  
Frequency Component ◽  
High Frequency Component ◽  
Parasympathetic Nerve ◽  
Interval Time Series ◽  
Hrv Analysis ◽  
Parasympathetic Function

Heart rate fragmentation (HRF) is a type of sinoatrial instability characterized by frequent (often every beat) appearance of inflection in the R-R interval time series, despite the electrocardiograms appearing to be sinus rhythm. Because the assessment of parasympathetic function by heart rate variability (HRV) analysis depends on the assumption that the high-frequency component (HF, 0.15–0.4 Hz) of HRV is mediated solely by the cardiac parasympathetic nerve, HRF that is measured as a part of HF power confounds the parasympathetic functional assessment by HRV. In this study, we analyzed HRF in a 24-h electrocardiogram big data and investigated the changes in HRF with age and sex and its influence on the assessment of HRV. We observed that HRF is often observed during childhoods (0–20 year) and increased after 75 year, but it has a large impact on individual differences in HF power at ages 60–90.

scholarly journals Heart Rate Variability Using The Analgesia Nociception Index as A Predictor of Illness Severity and Mortality in Critically Ill Patients with COVID-19.

2020 ◽  
Author(s):  
Cristian Aragón-Benedí ◽  
Pablo Oliver-Forniés ◽  
Felice Galluccio ◽  
Ece Yamak Altinpulluk ◽  
Tolga Ergonenc ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
High Frequency ◽  
Frequency Component ◽  
High Frequency Component ◽  
Autonomic Nervous

Abstract Introduction A balance between the autonomic nervous system and the immune system against SARS-COV-2 is critical in the resolution of its severe macrophage proinflammatory activation. To demonstrate that most severely ill COVID-19 patients will show a depletion of the sympathetic nervous system and a predominance of parasympathetic tone. We hypothesized that a low energy of an autonomic nervous system and a high level of the high frequency component of heart rate variability may be related to the number of proinflammatory cytokines and could have a predictive value in terms of severity and mortality in critically ill patients suffering from COVID-19; Materials and Methods Single-centre, prospective, observational pilot study which included COVID-19 patients admitted to the Surgical Intensive Care Unit. High frequency (HF) component of heart rate variability (HRV) and energy of the autonomic nervous system were recorded using analgesia nociception index monitor (ANI). To estimate the severity and mortality we used the SOFA score and the date of discharge or date of death.Results A total of fourteen patients were finally included in the study. High-frequency component of heart rate variability (ANIm) were higher in the non-survivor group (p = 0.003) and were correlated with higher IL-6 levels (p = 0.002) Energy was inversely correlated with SOFA (p = 0.029). Limit value at 80 of ANIm, predicted mortalities with the sensitivity of 100% and specificity of 85.7%. In the case of energy, a limit value of 0.41 predicted mortality with all predictive values of 71.4%.Conclusion The different components of the spectral analysis of HRV allow us to infer the association between the autonomic nervous system and critically ill patients’ immune system. A low autonomic nervous system activity and a predominance of the parasympathetic system due to sympathetic depletion in patients are associated with a worse prognosis and higher mortality.

Abstract 16157: Catheter Ablation Induces an Increase in Heart Rate With Discordant With a Decrease in Sympathetic Nerve Activity in Patients With Paroxysmal Atrial Fibrillation

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Yusuke Mukai ◽  
Hisayoshi Murai ◽  
Tadayuki Hirai ◽  
Hiroyuki Sugimoto ◽  
Takuto Hamaoka ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Catheter Ablation ◽  
Sympathetic Nerve ◽  
High Frequency ◽  
Sympathetic Nerve Activity ◽  
Low Frequency ◽  
Frequency Component ◽  
Nerve Activity ◽  
Parasympathetic Nerve

Background/Introduction: Paroxysmal atrial fibrillation (PAF) is the most common arrhythmia and catheter ablation (CA) is selected with the aim of rhythm control. CA was reported to increase heart rate (HR), which explains the modulation on the cardiac autonomic nervous system. However, little is known about the relationship between heart rate, sympathetic nerve activity and parasympathetic nerve activity in patient with PAF. Purpose: The purpose of this study was to evaluate the effect of CA on direct recording of muscle sympathetic nerve activity (MSNA) and heart rate variability (HRV), and these influences on HR. Methods: This study was conducted as a prospective, observational study. Patients with PAF who were scheduled for CA were enrolled. We measured blood pressure, HR, body weight, brain natriuretic peptide (BNP), echocardiogram parameters, high frequency component as cardiac parasympathetic nerve activity and low frequency component as cardiac sympathetic nerve activity in HRV, and MSNA before and 12 weeks after CA. Results: 21 PAF patients participated in this study. After CA, E/e’ and Ln BNP were significantly reduced(10.6±2.9 to 9.2±2.6, p<0.05. 3.8±1.3 to 3.3±1.6 log/pg/ml, p<0.05, respectively) while no significant changes were observed in EF, SV, left atrial diameter, left ventricular end diastolic and systolic diameters. HR was significantly increased (61.3±7.8 to 71.1±7.6 beats/min, p<0.05, respectively). However, the MSNA burst incidence and frequency were significantly decreased (65.4±12.6 to 41.3±13.4 bursts/100beats, p<0.01, n=21. 39.8±8.8 to 28.1±9.6 bursts/min, p<0.01, n=21. respectively). Also, the reduction in MSNA burst frequency was correlated with the increase in HR (r=0.57, 95%CI 0.183-0.804, p=0.00702). Ln Low frequency component in HRV was significantly decreased (5.72±1.75 to 3.85±2.13 log/ms 2 , p<0.05, n=12), but Ln high frequency (HF) component was not changed . No significant relationship observed between increased HR and HF component. Conclusion: CA induced paradoxical increasing heart rate with the reduction in sympathetic nerve activity in patient with PAF. These findings suggest that CA might modulate autonomic interaction between sinus nodes and in left atrium with denervated in ganglionated plexi.

Psycho-Vegetative Status and Plasma Catecholamines in the Men with Acute Coronary Syndrome

10.12737/5922 ◽  
2014 ◽  
Vol 21 (3) ◽  
pp. 146-149
Author(s):  
Алексеев ◽  
D. Alekseev ◽  
Лиман ◽  
T. Liman ◽  
Виноградов ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Acute Coronary Syndrome ◽  
High Frequency ◽  
Depressive Disorders ◽  
Frequency Component ◽  
High Frequency Component ◽  
Coronary Syndrome ◽  
Fatal Myocardial Infarction

The authors analyzed the manifestations of anxiety and depressive disorders, disturbance of autonomic regulation and changes in the level of catecholamines in the blood of patients with acute coronary syndrome from the perspective of outcomes of the disease. 102 men with a diagnosis of acute coronary syndrome were examined. Blood samples for the determination of catecholamines (epinephrine, norepinephrine, dopamine) was performed at admission, psychological examination and scrutiny of heart rate variability was performed on the third-fourth day of the hospitalization. All patients were divided into three groups. The first group was executed on 14 (13,7%) patients who had fatal myocardial infarction developed during hospitalization. In the second group there were 40 (47,1%) patients with non-fatal myocardial infarction. The third group included 48 (47,1%) patients with unstable angina. It was shown, that levels of anxiety and depression were inverse correlated with the concentration of dopamine in the plasma, and adrenaline levels are positively correlated with indicators of overall heart rate variability and its high frequency component. Thus, in patients with acute coronary syndrome, who developed myocardial infarction the incidence and severity of anxiety and depressive disorders is substantially lower than in patients with unstable angina. Increase in high frequency component of heart rate variability was more typical for patients with acute coronary syndrome who developed fatal myocardial infarction during hospitalization. High levels of dopamine in the blood plasma are typical for patients with nonfatal myocardial infarction.

Effects of 2-Hz and 100-Hz Electroacupuncture Stimulation on Respiratory Function and Heart Rate Variability: A Randomized Crossover Study

2021 ◽  
Author(s):  
Kazufumi Takahashi ◽  
Xiaoming Wang ◽  
Daiyu Shginohara ◽  
Kenji Imai
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Respiratory Function ◽  
Low Frequency ◽  
Frequency Component ◽  
Autonomic Nerve ◽  
High Frequency Component ◽  
Respiratory Function Test ◽  
Function Test

Background: Bronchial contraction and dilation is thought to be caused by non-adrenergic non-cholinergic nerves. Objective: To investigate the effects of low-frequency (1-5 Hz) and high frequency (50-100 Hz) electric acupuncture (EA) stimulation on bronchial dilation. Design: Prospective, single-center study. Setting: Teikyo Heisei University Subjects: Seventeen healthy male adults Randomization: We randomly assigned subjects to 2-Hz EA and 100-Hz EA groups in a crossover trial. The washout period was 2 weeks. Intervention: Both groups underwent a respiratory function test, followed by a 5-minute rest, followed a 5-minute rest or EA stimulation, followed by a 5- min rest. Heart rate variability was measured at rest, followed by another respiratory function test. Acupuncture was delivered near the cervical ganglia at the level of the sixth cervical vertebra on the left side. EA stimuli were set to 2-Hz or 100-Hz, and stimulation intensity was set to a level where no pain was felt. Main outcome measures: Spirometry (forced vital capacity, forced expiratory volume in 1 s, and maximum respiratory flow), autonomic nerve activity (low-frequency component, high-frequency component, and their ratio), and heart rate variability. Results: Heart rate variability analysis showed significant differences in heart rate between the 2-Hz EA and 100-Hz EA groups. The 2-Hz EA group showed a significant increase in HF. Conclusions: 2-Hz EA stimulation resulted in decreased heart rate and increased HF during stimulation. This may be more effective for regulation of the autonomic nerves of the cardiopulmonary system than 100-Hz EA stimulation. Future studies are required to confirm our findings.

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