scholarly journals The Impact of Resonance Frequency Breathing on Measures of Heart Rate Variability, Blood Pressure, and Mood

2017 ◽  
Vol 5 ◽  
Author(s):  
Patrick R. Steffen ◽  
Tara Austin ◽  
Andrea DeBarros ◽  
Tracy Brown
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Resonance Frequency ◽  
Resonance Frequency Breathing ◽  
The Impact

scholarly journals Plastics and cardiovascular health: phthalates may disrupt heart rate variability and cardiovascular reactivity

2017 ◽  
Vol 313 (5) ◽  
pp. H1044-H1053 ◽  
Author(s):  
Rafael Jaimes ◽  
Adam Swiercz ◽  
Meredith Sherman ◽  
Narine Muselimyan ◽  
Paul J. Marvar ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Medical Device ◽  
Cardiovascular Reactivity ◽  
Medical Devices ◽  
Autonomic Regulation ◽  
Phthalate Exposure ◽  
The Impact ◽  
Ethylhexyl Phthalate

Plastics have revolutionized medical device technology, transformed hematological care, and facilitated modern cardiology procedures. Despite these advances, studies have shown that phthalate chemicals migrate out of plastic products and that these chemicals are bioactive. Recent epidemiological and research studies have suggested that phthalate exposure adversely affects cardiovascular function. Our objective was to assess the safety and biocompatibility of phthalate chemicals and resolve the impact on cardiovascular and autonomic physiology. Adult mice were implanted with radiofrequency transmitters to monitor heart rate variability, blood pressure, and autonomic regulation in response to di-2-ethylhexyl-phthalate (DEHP) exposure. DEHP-treated animals displayed a decrease in heart rate variability (−17% SD of normal beat-to-beat intervals and −36% high-frequency power) and an exaggerated mean arterial pressure response to ganglionic blockade (31.5% via chlorisondamine). In response to a conditioned stressor, DEHP-treated animals displayed enhanced cardiovascular reactivity (−56% SD major axis Poincarè plot) and prolonged blood pressure recovery. Alterations in cardiac gene expression of endothelin-1, angiotensin-converting enzyme, and nitric oxide synthase may partly explain these cardiovascular alterations. This is the first study to show an association between phthalate chemicals that are used in medical devices with alterations in autonomic regulation, heart rate variability, and cardiovascular reactivity. Because changes in autonomic balance often precede clinical manifestations of hypertension, atherosclerosis, and conduction abnormalities, future studies are warranted to assess the downstream impact of plastic chemical exposure on end-organ function in sensitive patient populations. This study also highlights the importance of adopting safer biomaterials, chemicals, and/or surface coatings for use in medical devices.NEW & NOTEWORTHY Phthalates are widely used in the manufacturing of consumer and medical products. In the present study, di-2-ethylhexyl-phthalate exposure was associated with alterations in heart rate variability and cardiovascular reactivity. This highlights the importance of investigating the impact of phthalates on health and identifying suitable alternatives for medical device manufacturing.

scholarly journals Impact of Ramadan Intermittent Fasting on the Heart Rate Variability and Cardiovascular Parameters of Patients with Controlled Hypertension

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Sabah Hammoud ◽  
Iman Saad ◽  
Rita Karam ◽  
Fayez Abou Jaoude ◽  
Bart J. F. van den Bemt ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Blood Glucose ◽  
Intermittent Fasting ◽  
Ramadan Fasting ◽  
Hypertensive Patients ◽  
Cardiac Stress ◽  
Lipid Panel ◽  
The Impact

Background. Conflicting results are reported on the effect of Ramadan fasting on the cardiovascular health of patients with hypertension, a highly prevalent cardiovascular disease risk factor. This research aimed to evaluate the impact of fasting on cardiac health and heart rate variability (as a measure of cardiac stress) of hypertensive patients. Methods. Patients with controlled hypertension were followed in a prospective cohort during and after Ramadan. Lipid panel and blood glucose were measured at the end of each phase. Blood pressure and heart rate variability were monitored in the morning, afternoon, and evening of each follow-up day. Results. The study included 58 subjects (mean age: 54 ± 11.5 years, 52% male). Fasting did not affect body composition, lipid panel parameters, and blood pressure of hypertensive subjects; males only presented lower body weight and hip circumference during Ramadan. Blood glucose was significantly higher during Ramadan. Fasting significantly increased HRV during the afternoon period. Conclusions. Ramadan intermittent fasting reduces cardiac stress among hypertensive patients controlled by and adherent to hypertensive medication, without affecting their hypertensive state.

The Effects of the Medical Pause on Physiological Stress Markers among Health Care Providers: A Pilot Randomized Controlled Trial

2021 ◽  
pp. 019394592110276
Author(s):  
Ebru Cayir ◽  
Tim Cunningham ◽  
Ryne Ackard ◽  
Julie Haizlip ◽  
Jeongok Logan ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Health Care ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Health Care Providers ◽  
Physiological Stress ◽  
Intervention Group ◽  
Control Group ◽  
Care Providers ◽  
The Impact

Contemplative practices promote well-being, work engagement and resilience among health care providers. We examined the impact of The Pause, a brief contemplative intervention, on health care providers’ physiological stress response. Participants were randomly assigned to either The Pause or the control group. They participated in a high-fidelity, stressful medical simulation. Following the simulation, intervention group practiced The Pause. Outcome measures were heart rate variability, heart rate, and blood pressure. We adjusted for baseline physiological variables, sociodemographic variables, self-care practices, and perceived stress. Participants in the intervention group had a standard deviation of the normal-to-normal RR intervals (heart rate variability indicator) that was 13.8 (95% CI 4.0, 23.5; p < .01) points higher than those in the control group. There were no significant effects of The Pause on heart rate or blood pressure. The Pause may reduce stress reactivity, increase heart rate variability, and enhance resilience in health care providers.

Resonance Frequency Assessment: The Impact and Implications of Inaccurate Assessment in the Clinical Use of Heart Rate Variability Biofeedback

Biofeedback ◽  
2021 ◽  
Vol 49 (2) ◽  
pp. 38-41 ◽  
Author(s):  
Samuel Kohlenberg
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Clinical Practice ◽  
Resonance Frequency ◽  
Clinical Settings ◽  
Clinical Use ◽  
Heart Rate Variability Biofeedback ◽  
The Impact ◽  
As If

While many researchers and clinicians see assessing resonance frequency (RF) as an important step in heart rate variability biofeedback (HRVB), some practitioners providing HRVB acknowledge that they do not pay that much attention to RF. What if RF is not easily measured accurately or is not even particularly relevant to HRVB as it is practiced in the field? There is modest evidence suggesting that intertester reliability for RF may be relatively weak. Further study may be warranted to determine the accuracy and reliability of RF determinations in clinical settings and, perhaps, to what extent RF calculations are necessary at all. If RF is not really being used in the field, then there are a number of questions to be answered concerning the clinical practice of HRVB, such as if reliably determining RF is possible, and even whether HRVB as it is used clinically is biofeedback.

scholarly journals Differential effects of the blood pressure state on pulse rate variability and heart rate variability in critically ill patients

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Elisa Mejía-Mejía ◽  
James M. May ◽  
Mohamed Elgendi ◽  
Panayiotis A. Kyriacou
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Pulse Rate ◽  
Pulse Transit Time ◽  
Pulse Rate Variability ◽  
Physiological Factors ◽  
Ecg Signals ◽  
Non Invasive ◽  
Electrocardiogram Ecg

AbstractHeart rate variability (HRV) utilizes the electrocardiogram (ECG) and has been widely studied as a non-invasive indicator of cardiac autonomic activity. Pulse rate variability (PRV) utilizes photoplethysmography (PPG) and recently has been used as a surrogate for HRV. Several studies have found that PRV is not entirely valid as an estimation of HRV and that several physiological factors, including the pulse transit time (PTT) and blood pressure (BP) changes, may affect PRV differently than HRV. This study aimed to assess the relationship between PRV and HRV under different BP states: hypotension, normotension, and hypertension. Using the MIMIC III database, 5 min segments of PPG and ECG signals were used to extract PRV and HRV, respectively. Several time-domain, frequency-domain, and nonlinear indices were obtained from these signals. Bland–Altman analysis, correlation analysis, and Friedman rank sum tests were used to compare HRV and PRV in each state, and PRV and HRV indices were compared among BP states using Kruskal–Wallis tests. The findings indicated that there were differences between PRV and HRV, especially in short-term and nonlinear indices, and although PRV and HRV were altered in a similar manner when there was a change in BP, PRV seemed to be more sensitive to these changes.

scholarly journals Ethnic and sex differences in the longitudinal association between heart rate variability and blood pressure

2021 ◽  
pp. 1-7
Author(s):  
LaBarron K. Hill ◽  
Julian F. Thayer ◽  
DeWayne P. Williams ◽  
James D. Halbert ◽  
Guang Hao ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Sex Differences ◽  
Longitudinal Association
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