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https://www.readbyqxmd.com/read/28813842/using-wearable-physiological-sensors-to-predict-energy-expenditure
#1
Kimberly A Ingraham, Daniel P Ferris, C David Remy
Lower-limb assistive robotic devices are often evaluated by measuring a reduction in the user's energy cost. Using indirect calorimetry to estimate energy cost is poorly suited for real-time estimation and long-term collection. The goal of this study was to use data from wearable sensors to predict energy cost with better temporal resolution and less variability than breath measurements. We collected physiological data (heart rate, electrodermal activity, skin temperature) and mechanical data (EMG, accelerometry) from three healthy subjects walking on a treadmill at various speeds on level ground, inclined, and backwards...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812280/effect-of-missing-inter-beat-interval-data-on-heart-rate-variability-analysis-using-wrist-worn-wearables
#2
Hyun Jae Baek, JaeWook Shin
Most of the wrist-worn devices on the market provide a continuous heart rate measurement function using photoplethysmography, but have not yet provided a function to measure the continuous heart rate variability (HRV) using beat-to-beat pulse interval. The reason for such is the difficulty of measuring a continuous pulse interval during movement using a wearable device because of the nature of photoplethysmography, which is susceptible to motion noise. This study investigated the effect of missing heart beat interval data on the HRV analysis in cases where pulse interval cannot be measured because of movement noise...
August 15, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28811618/assessment-of-the-role-of-ageing-and-non-ageing-factors-in-death-from-non-communicable-diseases-based-on-a-cumulative-frequency-model
#3
Liu Hui
To quantify the effects of ageing and non-ageing factors, a characterization of the effects of ageing, genetic, and exogenous variables on 12 major non-communicable diseases was evaluated using a model assessing cumulative frequency of death and survival by age group from dead and surviving populations based on mortality statistics. Indices (0-1) of the roles of ageing (ARD), genetics (GRD) and exogenous (ERD) variables in deaths due to disease were established, and the sum of ARD, GRD and ERD was 1 (value of each indices was <1)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811239/gamma-glutamyltransferase-and-risk-of-chronic-kidney-disease-a-prospective-cohort-study
#4
Setor K Kunutsor, Jari A Laukkanen
BACKGROUND: Elevated serum gamma-glutamyltransferase (GGT) activity has been linked with an increased risk of chronic kidney disease (CKD) in Asian populations. We aimed to assess the prospective association of serum GGT with risk of CKD in a Caucasian population. MATERIALS AND METHODS: We related GGT activity to the incidence of CKD in 2338 men aged 42-61years of the Kuopio Ischemic Heart Disease study with normal kidney function at baseline. Repeat measurements of GGT were used to correct for within-person variability...
August 12, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28810469/psychological-factors-and-self-rated-health-an-observative-study-on-cardiological-patients
#5
Claudia Chiavarino, Chiara Poggio, Franco Rusconi, Anna Angela Rachele Beretta, Stefano Aglieri
This study investigated the association of illness representations, awareness of bodily states and health complaints to self-rated health in N = 150 consecutive patients with heart disease (ischaemic disease, heart failure and heart valve disease) and explored differences between 'health optimist' and 'health pessimist' patients. After controlling for medical variables, health complaints accounted for 14.2 per cent of patients' self-rated health, and illness representations contributed for another 16...
June 1, 2017: Journal of Health Psychology
https://www.readbyqxmd.com/read/28810362/effect-of-exercise-training-in-heart-rate-variability-anxiety-depression-and-sleep-quality-in-kidney-recipients-a-preliminary-study
#6
Rodrigo Barroso, Antonio C Silva-Filho, Carlos José Dias, Nivaldo Soares, Alessandra Mostarda, Luana Anaisse Azoubel, Leandro Melo, Alessandra de Mc Garcia, Bruno Rodrigues, Cristiano Texeira Mostarda
The aim of this study was to compare the sleep quality, depression, anxiety, and autonomic function of a group of kidney-transplanted recipients who joined a combined exercise program (KTRt) or remained sedentary (KTRs). A total of 20 kidney-transplanted recipients, split into two groups (10 KTRt and 10 KTRs), joined the study. Heart rate variability, cardiorespiratory capacity, depression, and sleep questionnaires were evaluated. KTRt presented lower Pittsburgh Sleep Quality Index and greater entropy, and increased parasympathetic and decreased sympathetic modulation than KTRs...
November 1, 2016: Journal of Health Psychology
https://www.readbyqxmd.com/read/28809848/a-multimodal-dataset-for-various-forms-of-distracted-driving
#7
Salah Taamneh, Panagiotis Tsiamyrtzis, Malcolm Dcosta, Pradeep Buddharaju, Ashik Khatri, Michael Manser, Thomas Ferris, Robert Wunderlich, Ioannis Pavlidis
We describe a multimodal dataset acquired in a controlled experiment on a driving simulator. The set includes data for n=68 volunteers that drove the same highway under four different conditions: No distraction, cognitive distraction, emotional distraction, and sensorimotor distraction. The experiment closed with a special driving session, where all subjects experienced a startle stimulus in the form of unintended acceleration-half of them under a mixed distraction, and the other half in the absence of a distraction...
August 15, 2017: Scientific Data
https://www.readbyqxmd.com/read/28808939/comparison-of-left-ventricular-shape-by-gated-spect-imaging-in-diabetic-and-nondiabetic-patients-with-normal-myocardial-perfusion-a-propensity-score-analysis
#8
Carmela Nappi, Valeria Gaudieri, Wanda Acampa, Roberta Assante, Emilia Zampella, Ciro Gabriele Mainolfi, Mario Petretta, Guido Germano, Alberto Cuocolo
BACKGROUND: Diabetes mellitus induces structural and functional cardiac alterations that can result in heart failure. Left ventricular (LV) shape is a dynamic component of cardiac geometry influencing its contractile function. However, few data are available comparing LV shape index in diabetic and nondiabetic patients without overt coronary artery disease after balancing for coronary risk factors. METHODS: We studied 1168 patients with normal myocardial perfusion and normal LV ejection fraction on stress gated single-photon emission computed tomography (SPECT) imaging...
August 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28808933/cardiovascular-disease-in-clozapine-treated-patients-evidence-mechanisms-and-management
#9
REVIEW
Kathlyn J Ronaldson
Myocarditis occurs in about 3% of those initiated on clozapine but monitoring reduces the risk of serious outcome. Cardiomyopathy may develop after myocarditis, or from prolonged tachycardia. Monitoring using echocardiography is not deemed cost effective. Tachycardia, orthostatic hypotension and reduced heart rate variability are a group of clozapine-related adverse effects associated with autonomic dysfunction and may have serious consequences in the long term. Elevated heart rate and poor heart rate variability can be treated with a β-blocker or a non-dihydropyridine calcium channel blocker, while orthostatic hypotension can be alleviated by increased fluid intake and abdominal binding, but may require pharmacological intervention...
August 14, 2017: CNS Drugs
https://www.readbyqxmd.com/read/28808838/comparison-of-coronary-sinus-diameter-z-scores-in-normal-fetuses-and-fetuses-with-persistent-left-superior-vena-cava-plsvc
#10
Mingming Ma, Yan Tan, Ran Chen, Yankai Mao, Bei Wang, Bowen Zhao
To establish Z-score reference ranges for coronary sinus (CS) diameter in normal fetuses and explore the diagnostic value of CS Z-score in fetuses with persistent left superior vena cava (PLSVC). Study of 235 normal fetuses and 30 fetuses with PLSVC was involved. Noncardiac biometrical parameters included biparietal diameter (BPD), femoral length (FL), heart area (HA), gestation age (GA). The coronary sinus systolic and diastolic diameter (CSDs and CSDd ) were measured at the end of systole and diastole. CSDs and CSDd Z-score models were constructed by using linear regression analysis with Non-cardiac biometrical parameters as independent variables...
August 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28808334/cardiorespiratory-optimization-during-improvised-singing-and-toning
#11
N F Bernardi, S Snow, I Peretz, H D Orozco Perez, N Sabet-Kassouf, A Lehmann
We evaluated the effect of different forms of singing on cardiorespiratory physiology, and we aimed at disentangling the role of breathing from that of vocal production. Cardiorespiratory recordings were obtained from 20 healthy adults at rest and during: a) singing of familiar slow songs as in the standard form of Western culture; b) improvised vocalization of free vowel sounds, known as toning. To disentangle the role of breathing from that of vocal production, we compared the vocal conditions with matched breathing-only conditions...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808278/elevated-long-term-resting-heart-rate-variation-is-associated-with-increased-risk-of-all-cause-mortality-in-northern-china
#12
Binhao Wang, Huihua Li, Xu Han, Yiheng Yang, Yue Chen, Wenyu Li, Xiaolei Yang, Aijun Xing, Yanxiu Wang, Tesfaldet Habtemariam Hidru, Shouling Wu, Yunlong Xia
Elevated resting heart rate (RHR) predicts all-cause death. However, the relationship between RHR variation over years and mortality are still unknown. We aimed to analyze the association between RHR variation and all-cause mortality in the general population without cardiovascular diseases. A total of 46,873 subjects were included from the Kailuan Study (2006-2011). RHR readings were taken during three separate examinations and the RHR variation was defined using the standard deviation (RHR-SD) and the coefficient of variation...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807718/autonomic-regulation-of-systemic-inflammation-in-humans-a-multi-center-blinded-observational-cohort-study
#13
Gareth L Ackland, Gary Minto, Martin Clark, John Whittle, Robert Cm Stephens, Thomas Owen, Pradeep Prabhu, Ana Gutierrez Del Arroyo
OBJECTIVE: Experimental animal models demonstrate that autonomic activity regulates systemic inflammation. By contrast, human studies are limited in number and exclusively use heart rate variability (HRV) as an index of cardiac autonomic regulation. HRV measures are primarily dependent on, and need to be corrected for, heart rate. Thus, independent autonomic measures are required to confirm HRV-based findings. Here, the authors sought to replicate the findings of preceding HRV-based studies by using HRV-independent, exercise-evoked sympathetic and parasympathetic measures of cardiac autonomic regulation to examine the relationship between autonomic function and systemic inflammation...
August 11, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28807663/incidence-and-predictors-of-late-atrioventricular-conduction-recovery-among-patients-requiring-permanent-pacemaker-for-complete-heart-block-after-cardiac-surgery
#14
Erich L Kiehl, Tarek Makki, Ralph M Matar, Douglas R Johnston, John W Rickard, Khaldoun G Tarakji, Mohamed Kanj, Oussama M Wazni, Walid I Saliba, Niraj Varma, Bruce L Wilkoff, Daniel J Cantillon
BACKGROUND: New-onset complete heart block (CHB) commonly complicates cardiac surgery, for which some patients require a permanent pacemaker (PPM). Little is known regarding late atrioventricular (AV) conduction recovery. OBJECTIVE: To characterize the incidence and predictors of late AV conduction recovery among patients requiring PPM after cardiac surgery. METHODS: Consecutive patients receiving PPM for CHB following cardiac surgery at a high-volume US center from 2000-2014 were evaluated...
August 11, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28807383/prediction-of-major-cardiac-events-after-vascular-surgery
#15
Danielle M Gualandro, Christian Puelacher, Giovanna LuratiBuse, Gisela B Llobet, Pai C Yu, Francisco A Cardozo, Noemi Glarner, Andres Zimmerli, Jaqueline Espinola, Sydney Corbière, Daniela Calderaro, Andre C Marques, Ivan B Casella, Nelson de Luccia, Mucio T Oliveira, Andreas Lampart, Daniel Bolliger, Luzius Steiner, Manfred Seeberger, Christoph Kindler, Stefan Osswald, Lorenz Gürke, Bruno Caramelli, Christian Mueller
OBJECTIVE: Predicting cardiac events is essential to provide patients with the best medical care and to assess the risk-benefit ratio of surgical procedures. The aim of our study was to evaluate the performance of the Revised Cardiac Risk Index (Lee) and the Vascular Study Group of New England Cardiac Risk Index (VSG) scores for the prediction of major cardiac events in unselected patients undergoing arterial surgery and to determine whether the inclusion of additional risk factors improved their accuracy...
August 11, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28806975/admission-blood-glucose-and-10-year-mortality-among-patients-with-or-without-pre-existing-diabetes-mellitus-hospitalized-with-heart-failure
#16
Osnat Itzhaki Ben Zadok, Ran Kornowski, Ilan Goldenberg, Robert Klempfner, Yoel Toledano, Yitschak Biton, Enrique Z Fisman, Alexander Tenenbaum, Gregory Golovchiner, Ehud Kadmon, Alexander Omelchenko, Tuvia Ben Gal, Alon Barsheshet
BACKGROUND: High admission blood glucose (ABG) level has been associated with a poor short-term outcome among non-diabetic patients with heart failure (HF). We aimed to investigate the association between ABG levels and long-term (10 years) mortality in patients with or without pre-existing diabetes mellitus (DM) admitted with HF. METHODS: We analyzed data on 1811 patients with DM and 2182 patients without pre-existing DM who were hospitalized with HF during a prospective national survey...
August 14, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28806965/decreased-circulating-dihomo-gamma-linolenic-acid-levels-are-associated-with-total-mortality-in-patients-with-acute-cardiovascular-disease-and-acute-decompensated-heart-failure
#17
Shohei Ouchi, Tetsuro Miyazaki, Kazunori Shimada, Yurina Sugita, Megumi Shimizu, Azusa Murata, Takao Kato, Tatsuro Aikawa, Shoko Suda, Tomoyuki Shiozawa, Masaru Hiki, Shuhei Takahashi, Takatoshi Kasai, Katsumi Miyauchi, Hiroyuki Daida
BACKGROUND: Polyunsaturated fatty acids (PUFAs) have important roles in the pathogenesis of cardiovascular diseases. However, the clinical significance of omega-6 PUFAs in acute cardiovascular disease remains unknown. METHODS: We enrolled 417 consecutive patients with acute cardiovascular disease admitted to the cardiac intensive care unit at Juntendo University Hospital between April 2012 and October 2013. We investigated the association between serum PUFA levels and long-term mortality...
August 14, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28806776/the-very-low-frequency-band-of-heart-rate-variability-represents-the-slow-recovery-component-after-a-mental-stress-task
#18
Harunobu Usui, Yusuke Nishida
The very low-frequency (VLF) band of heart rate variability (HRV) has different characteristics compared with other HRV components. Here we investigated differences in HRV changes after a mental stress task. After the task, the high-frequency (HF) band and ratio of high- to low-frequency bands (LF/HF) immediately returned to baseline. We evaluated the characteristics of VLF band changes after a mental stress task. We hypothesized that the VLF band decreases during the Stroop color word task and there would be a delayed recovery for 2 h after the task (i...
2017: PloS One
https://www.readbyqxmd.com/read/28806775/depression-screening-with-patient-targeted-feedback-in-cardiology-the-cost-effectiveness-of-depscreen-info
#19
Christian Brettschneider, Sebastian Kohlmann, Benjamin Gierk, Bernd Löwe, Hans-Helmut König
BACKGROUND: Although depression is common in patients with heart disease, screening for depression is much debated. DEPSCREEN-INFO showed that a patient-targeted feedback in addition to screening results in lower depression level six months after screening. The purpose of this analysis was to perform a cost-effectiveness analysis of DEPSCREEN-INFO. METHODS: Patients with coronary heart disease or arterial hypertension were included. Participants in both groups were screened for depression...
2017: PloS One
https://www.readbyqxmd.com/read/28805343/rest-and-exercise-hemodynamic-and-metabolic-findings-in-active-duty-soldiers-referred-for-cardiac-catheterization-to-exclude-heart-disease-insights-from-past-invasive-cardiopulmonary-exercise-testing-using-multisensor-high-fidelity-catheters
#20
James A Watts, Faith R Kelly, Terry D Bauch, Joseph P Murgo, Bernard J Rubal
OBJECTIVE: This study describes results of iCPET from the past, which used submaximal stress and multisensor high-fidelity catheters to exclude heart disease in a unique population of young adults. BACKGROUND: There has been resurgence in comprehensive hemodynamic evaluation of complex cardiovascular patients. Although dynamic assessments during cardiac catheterization have become commonplace, there remains limited information regarding left and right heart hemodynamic changes during supine exercise in young adults...
May 8, 2017: Catheterization and Cardiovascular Interventions
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