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Heart variability

Sarah B Mulkey, Srinivas Kota, Christopher B Swisher, Laura Hitchings, Marina Metzler, Yunfei Wang, G Larry Maxwell, Robin Baker, Adre J du Plessis, Rathinaswamy Govindan
BACKGROUND: Premature infants are vulnerable to destructive brain injury and disturbed neurological development. Prematurity may alter maturation of the central autonomic nervous system (ANS). AIMS: To compare ANS function (using heart rate variability; HRV) between preterm infants with normal neuroimaging at term equivalent age and low-risk term controls. Study design, subjects. We performed a case-control study of preterm infants born ≤28 weeks gestational age that had normal brain imaging and archived continuous EKG data at term equivalent age...
July 16, 2018: Early Human Development
Mary Ella Pierpont, Maria Cristina Digilio
PURPOSE OF REVIEW: To provide information on the scope of cardiac disease in Noonan syndrome. RECENT FINDINGS: Noonan syndrome is a common autosomal dominant RASopathy disorder characterized by clinical findings of facial dysmorphism, congenital heart disease, and short stature. The degree of genetic heterogeneity has recently become evident in that Noonan syndrome is now known to be caused by mutations in a large variety of genes which produce dysregulation of the RAS-MAPK (mitogen-activated protein kinase) signaling pathway...
July 17, 2018: Current Opinion in Pediatrics
Soroor Behbahani
Epilepsy is a brain disorder that many people struggle with all over the world. Despite extensive research, epilepsy is still an important challenge without a clear solution. There may be confusion about providing a specific approach due to the variety of epileptic seizures and the effectiveness in different environmental conditions. Some patients with epilepsy undergo treatment through medication or surgery. Epileptic patients suffer from unpredictable conditions that may occur at any moment. Given the origins of these seizures, researchers have focused on predicting epileptic seizures via electroencephalogram (EEG)...
July 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
Yuri Feito, Terence A Moriarty, Gerald Mangine, Jessica Monahan
BACKGROUND: Wearable devices are common in the health and fitness industry and provide valuable information to improve and achieve fitness goals. The Hexoskin shirt (Hx) is one such device that has been shown to be valid and reliable. The purpose of this pilot study was to compare the Hx to established methods during a maximal graded exercise test (TM) and a High-Intensity Functional Training (HIFT) session. METHODS: Ten healthy individuals (31.0 ± 7.6 years, 76...
July 18, 2018: Journal of Sports Medicine and Physical Fitness
Francisco J Amaro-Gahete, Alejandro De-la-O, Lucas Jurado-Fasoli, Andrea Espuch-Oliver, Lidia Robles-Gonzalez, Ginés Navarro-Lomas, Tomás de Haro, Pedro Femia, Manuel J Castillo, Angel Gutierrez
Aims: The secreted form of the α-Klotho gene (S-Klotho), which is considered a powerful biomarker of longevity, makes it an attractive target as an anti-ageing therapy against functional decline, sarcopenic obesity, metabolic and cardiovascular diseases, osteoporosis, and neurodegenerative disorders. The S-Klotho plasma levels could be related to physical exercise inasmuch physical exercise is involved in physiological pathways that regulate the S-Klotho plasma levels. FIT-AGEING will determine the effect of different training modalities on the S-Klotho plasma levels (primary outcome) in sedentary healthy adults...
September 2018: Contemporary Clinical Trials Communications
Elif Budak Ertürk, Hayriye Ünlü
Objectives: Individualized education is important for preparing patients for the operation both physically and psychologically. This study investigated the effects of pre-operative individualized education for open-heart surgery patients on post-operative anxiety and pain severity. Methods: This quasi-experimental study was conducted in a university hospital between January and October 2014 and involved 109 patients. Data were collected through a form developed by the authors, the State-Trait Anxiety Inventory (STAI), and the visual analog scale (VAS)...
July 2018: International Journal of Health Sciences
Boqing Xu, Takayuki Kawata, Masao Daimon, Koichi Kimura, Tomoko Nakao, Seitetz C Lee, Megumi Hirokawa, Aya Yoshinaga, Masafumi Watanabe, Yutaka Yatomi, Issei Komuro
The prognostic value of the right ventricular (RV) systolic to diastolic duration ratio (S/D ratio) in patients with advanced heart failure is not clear.We enrolled 45 patients with DCM (40 ± 13 years, 33 male) who were admitted to our hospital for evaluation or treatment of heart failure. The RV systolic and diastolic durations were measured using continuous Doppler imaging of tricuspid regurgitation, and the RV S/D ratio was calculated. Cardiac events were defined as cardiac death or left ventricular assist device implantation within the first year...
July 18, 2018: International Heart Journal
Peysh A Patel, Noman Ali, Ashwin Roy, Stuart Pinder, Richard M Cubbon, Mark T Kearney, Klaus K Witte
BACKGROUND: Ivabradine is licensed as add-on therapy in patients with severe left ventricular systolic dysfunction (LVSD), normal sinus rhythm, and suboptimal heart rate (HR) control, but effects are not fully established. This study sought to assess the impact of ivabradine therapy on hemodynamic and functional outcome measures in all patients with LVSD. METHODS: MEDLINE (1996-2017), Embase (1996-2017), Cochrane Central Register of Controlled Trials (CENTRAL), Cochrane Database of Systematic Reviews, ClinicalTrials...
July 18, 2018: Journal of General Internal Medicine
Levente Kovács, Fruzsina Luca Kézér, Ferenc Ruff, Viktor Jurkovich, Ottó Szenci
We estimated thermal stress in 7-week old Holstein bull calves during a warm episode in summer to study acute physiological responses of calves to heat stress. Data were collected over a 5-day period: day 1 (control), day 2 (heat stress), and a 3-day post-stress period in shaded (n = 8) and unshaded (n = 8) thermal environments. On the control day, both groups were shaded. Thermal environment was characterized by relative humidity, ambient temperature, and the temperature-humidity index (THI). Physiological variables included respiratory rate, rectal temperature, ear skin temperature and heart rate...
2018: PloS One
Jeffrey M Pyne, Joseph I Constans, John T Nanney, Mark D Wiederhold, Douglas P Gibson, Timothy Kimbrell, Teresa L Kramer, Jeffery A Pitcock, Xiaotong Han, D Keith Williams, Don Chartrand, Richard N Gevirtz, James Spira, Brenda K Wiederhold, Rollin McCraty, Thomas R McCune
Introduction: There is a long history of pre-deployment PTSD prevention efforts in the military and effective pre-deployment strategies to prevent post-deployment PTSD are still needed. Materials and Methods: This randomized controlled trial included three arms: heart rate variability biofeedback (HRVB), cognitive bias modification for interpretation (CBM-I), and control. The hypothesis was that pre-deployment resilience training would result in lower post-deployment PTSD symptoms compared with control...
July 18, 2018: Military Medicine
Gwendolyn A R Donley, Eija Lönnroos, Tomi-Pekka Tuomainen, Jussi Kauhanen
Background: There remains a dearth of life-course studies analyzing childhood environment and late-life chronic illness. In particular, few have addressed possible early-life predictors of dementia. This study examines relationships between childhood stress and later-age dementia, specifically Alzheimer's disease (AD). Methods: We used data from 2682 men in the population-based Kuopio Ischemic Heart Disease Risk Factor Study who participated in extensive baseline health examinations and interviews between 1984 and 1989, when they were between 42 and 61 years of age...
July 17, 2018: European Journal of Public Health
Elaine Aparecida de Oliveira, Anne Kastelianne França da Silva, Diego Giuliano Destro Christofaro, Laís Manata Vanzella, Rayana Loch Gomes, Franciele Marques Vanderlei, Luiz Carlos Marques Vanderlei
BACKGROUND: Type 1 diabetes mellitus can cause autonomic changes, which can be assessed by heart rate variability. Among the heart rate variability assessment methods, the symbolic analysis and Shannon entropy, based on the Chaotic dynamics, have gained prominence. OBJECTIVE: To compare heart rate variability indexes, obtained through symbolic analysis and Shannon entropy, in young adults with type 1 diabetes mellitus and healthy young individuals, associated with the analysis of linear indexes; and to verify if there are associations between the indexes obtained by the symbolic analysis and by Shannon entropy and linear indexes in diabetic individuals...
July 16, 2018: Arquivos Brasileiros de Cardiologia
Judith Pizarro Andersen, Paula Maria Di Nota, Brett Beston, Evelyn Carol Boychuk, Harri Gustafsberg, Steven Poplawski, Joseph Arpaia
OBJECTIVES: To test an intervention modifying officer physiology to reduce lethal force errors and improve health. METHODS: A longitudinal, within-subjects intervention study was conducted with urban front-line police officers (n = 57). The physiological intervention applied an empirically-validated method of enhancing parasympathetic engagement (i.e., heart rate variability biofeedback) during stressful training that required lethal force decision-making. RESULTS: Significant post-intervention reductions in lethal force errors, and in the extent and duration of autonomic arousal, were maintained across 12 months...
July 16, 2018: Journal of Occupational and Environmental Medicine
Matej Sapina, Marcin Kosmider, Karolina Kramaric, Matthieu Garcin, David Adelson, Marko Pirić, Kresimir Milas, Dario Brdaric
To detect stress in newborns by observing heart rate (HR) variability utilizing an asymmetric detrended fluctuation analysis (ADFA), we sought to determine the fractal structure of the series of inter-beat intervals, so as to distinguish the periods of acceleration of the HR from decelerations. Thus, two scaling exponents, α+ and α-, representing decelerations, and accelerations, respectively, are obtained. 
 Approach: Forty healthy term newborns were included in this study, undergoing two different types of stress stimuli: routine heel lance blood sampling for metabolic screening purposes and its simulation by applying dull pressure on the heel...
July 18, 2018: Physiological Measurement
Mako Hayase, Mieko Shimada
AIM: To elucidate the changes in the daily variation seen in the autonomic nervous system during pregnancy brought about by maternity yoga and to evaluate how maternal yoga affects stress and sleep. METHODS: A prospective, longitudinal study was conducted between January 2013 and December 2014. Pregnant women who were attending maternity yoga classes at Palmore Hospital between 20 and 23 weeks' gestation were enrolled as the yoga group, and a matched control group was also enrolled...
July 17, 2018: Journal of Obstetrics and Gynaecology Research
Nina Zaproudina, Jukka A Lipponen, Mika P Tarvainen, Anu Vierola, Saara M Rissanen, Pasi A Karjalainen, Matti Närhi
BACKGROUND: Systemic autonomic changes are well-known in migraineurs. Also, masticatory dysfunctions including tooth clenching are reported to be associated with migraine. However, if those phenomena are interrelated, and how, is unclear. Moreover, the knowledge on the autonomic responses to masticatory stimuli in migraineurs is limited. OBJECTIVE: To investigate tooth clenching-related cardiac autonomic regulation in migraineurs. METHODS: We compared maximal tooth clenching-induced systemic autonomic responses, indicated by heart rate variability and blood pressure changes, in headache-free migraineurs (n=17) and control subjects (n=22)...
July 17, 2018: Journal of Oral Rehabilitation
Anna Jonsson, Helena Norberg, Ellinor Bergdahl, Krister Lindmark
AIM: Previous studies and national assessments indicate an undertreatment of mineralocorticoid receptor antagonists (MRA) in heart failure with reduced ejection fraction (HFrEF). This study aims to investigate why MRA is not used to full extent. METHODS: A complete community based heart failure population was studied. Several variables were collected and medical records were scrutinized to identify reasons for not prescribing MRA. RESULTS: Of 2029 patients, 812 had EF ≤ 40%...
July 17, 2018: Cardiovascular Therapeutics
Bradley J Petek, Meagan M Wasfy
PURPOSE OF REVIEW: The number of female athletes participating in sports has increased exponentially over the past century. While cardiac adaptations to exercise have been well described, female athletes have been underrepresented in many prior studies. More recently, important research has embraced gender as an important biologic variable. We will review this work in order to examine how gender influences the impact of exercise on the heart. RECENT FINDINGS: Exercise-induced cardiac remodeling (EICR) manifests slightly differently in male and female athletes...
July 18, 2018: Current Treatment Options in Cardiovascular Medicine
Marcelo Conrado de Freitas, Ana Laura Ricci-Vitor, Giovanni Henrique Quizzini, João Vitor N S de Oliveira, Luiz Carlos M Vanderlei, Fabio Santos Lira, Fabrício Eduardo Rossi
To investigate the effects of full versus split body resistance exercise on postexercise hypotension and autonomic modulation in trained men. Sixteen resistance recreationally trained males (age, 24.9±5.3 years) performed three randomized trials: upper body (UB), lower body (LB), and full body (FB) conditions. Blood pressure and heart rate variability were collected at rest, immediately postexercise, post-10, and post-30 min during recovery. For systolic blood pressure, delta (30 min minus rest) was lower for the FB condition compared to the UB (-10...
June 2018: Journal of Exercise Rehabilitation
Abdullah Alansare, Ken Alford, Sukho Lee, Tommie Church, Hyun Chul Jung
Physically inactive adults are prevalent worldwide. This study compared the effects of short-term high-intensity interval training (HIIT) versus moderate-intensity continuous training (MICT) on heart rate variability (HRV) in physically inactive adults as a preliminary study. Thirteen physically inactive male adults (27.5 ± 3.80 years) were randomly assigned to HIIT (N = 7) or MICT (N = 6). The HIIT program consisted of 20 min of interval training with cycling to rest ratio of 10/50 s at ≥90% HRpeak , while the MICT program consisted of 40 min of continuous cycling at 60⁻75% HRpeak ...
July 17, 2018: International Journal of Environmental Research and Public Health
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