keyword
MENU ▼
Read by QxMD icon Read
search

Impedance cardiography

keyword
https://www.readbyqxmd.com/read/28103058/emotion-dysregulation-across-emotion-systems-in-attention-deficit-hyperactivity-disorder
#1
Erica D Musser, Joel T Nigg
Children with attention deficit/hyperactivity disorder (ADHD) display alterations in both emotion reactivity and regulation. One mechanism underlying such alternations may be reduced coherence among emotion systems (i.e., autonomic, facial affect). The present study sought to examine this. One hundred children (50 with ADHD combined presentation), 7-11 years of age (62% male, 78% White), completed an emotion induction and suppression task. This task was coded for facial affect behavior across both negative and positive emotion eliciting task conditions...
January 19, 2017: Journal of Clinical Child and Adolescent Psychology
https://www.readbyqxmd.com/read/28099709/preliminary-study-of-the-effects-of-furosemide-on-blood-pressure-during-late-onset-pre-eclampsia-in-patients-with-high%C3%A2-cardiac-output
#2
Péter Tamás, Eszter Hantosi, Bálint Farkas, Zsolt Ifi, József Betlehem, József Bódis
OBJECTIVE: To examine the effect of furosemide on hypertension and edema in patients with pre-eclampsia experiencing high cardiac output. METHODS: The present cohort study enrolled patients with pre-eclampsia who were admitted to the pregnancy pathology unit of the Department of Obstetrics and Gynecology, University of Pécs, Hungary, between January 1 and December 31, 2015. Eligible patients had singleton pregnancies with no fetal anomalies, high blood volume, visible edema, and a hematocrit concentration below 37 L/L...
January 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28012450/exploring-sexual-dimorphism-in-placental-circulation-at-22-24-weeks-of-gestation-a-cross-sectional-observational-study
#3
Christian Widnes, Kari Flo, Ganesh Acharya
INTRODUCTION: Placental blood flow is closely associated with fetal growth and wellbeing. Recent studies suggest that there are differences in blood flow between male and female fetuses. We hypothesized that sexual dimorphism exists in fetal and placental blood flow at 22-24 weeks of gestation. METHODS: This was a prospective cross-sectional study of 520 healthy pregnant women. Blood flow velocities of the middle cerebral artery (MCA), umbilical artery (UA), umbilical vein (UV) and the uterine arteries (UtA) were measured using Doppler ultrasonography...
January 2017: Placenta
https://www.readbyqxmd.com/read/27924461/life-satisfaction-and-hemodynamic-reactivity-to-mental-stress
#4
Andreas Schwerdtfeger, Kerstin Gaisbachgrabner, Claudia Traunmüller
BACKGROUND: Satisfaction with life has been considered a health-protective variable, which could impact cardiovascular morbidity and mortality. However, few studies have examined the physiological pathways involved in the potentially salutary effect of life satisfaction. It was hypothesized that life satisfaction should be associated with a cardiovascular response profile that signals challenge (i.e., higher cardiac output, lower peripheral resistance), rather than threat during a mental stress task...
December 6, 2016: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/27914174/mathematical-detection-of-aortic-valve-opening-b-point-in-impedance-cardiography-a-comparison-of-three-popular-algorithms
#5
Javier Rodríguez Árbol, Pandelis Perakakis, Alba Garrido, José Luis Mata, M Carmen Fernández-Santaella, Jaime Vila
The preejection period (PEP) is an index of left ventricle contractility widely used in psychophysiological research. Its computation requires detecting the moment when the aortic valve opens, which coincides with the B point in the first derivative of impedance cardiogram (ICG). Although this operation has been traditionally made via visual inspection, several algorithms based on derivative calculations have been developed to enable an automatic performance of the task. However, despite their popularity, data about their empirical validation are not always available...
December 3, 2016: Psychophysiology
https://www.readbyqxmd.com/read/27858914/values-of-hemodynamic-variation-in-response-to-passive-leg-raising-in-predicting-exercise-capacity-of-heart-failure-with-preserved-ejection-fraction
#6
Hong-Lian Zhou, Ling Ding, Tao Mi, Kai Zheng, Xiao-Fen Wu, Jing Wang, Meng-Ying Liu, Le Zhang, Cun-Tai Zhang, Xiao-Qing Quan
In heart failure patients with preserved ejection fraction, their hemodynamic parameters usually change when they are from recumbent to passive leg raising. The authors designed this study to investigate the relationship between hemodynamic parameters measured by impedance cardiography (ICG) and 6-minute walk distance (6MWD) of heart failure with preserved ejection fraction (HFPEF). We recruited 49 subjects with HFPEF in the study, and all the subjects were separated into 2 groups: the patients whose hemodynamic parameters rose after passive leg raising were in group 1 (n = 26) and the patients whose hemodynamic parameters did not rise after passive leg raising were in group 2 (n = 23)...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27851100/1464-utility-of-impedance-cardiography-on-hemodynamic-monitoring-in-septic-patients
#7
Yizhi Shan, Andres Samayoa, Ryan Shadis, James Yusckak, Orlando Kirton, Thai Vu
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27832647/extracellular-volume-overload-and-increased-vasoconstriction-in-patients-with-recurrent-intradialytic-hypertension
#8
Peter Noel Van Buren, Yunyun Zhou, Javier A Neyra, Guanghua Xiao, Wanpen Vongpatanasin, Jula Inrig, Robert Toto
BACKGROUND/AIMS: Intradialytic hypertension (IH) occurs frequently in some hemodialysis patients and increases mortality risk. We simultaneously compared pre-dialysis, post-dialysis and changes in extracellular volume and hemodynamics in recurrent IH patients and controls. METHODS: We performed a case-control study among prevalent hemodialysis patients with recurrent IH and hypertensive hemodialysis controls. We used bioimpedance spectroscopy and impedance cardiography to compare pre-dialysis, post-dialysis, and intradialytic change in total body water (TBW) and extracellular water (ECW), as well as cardiac index (CI) and total peripheral resistance index (TPRI)...
2016: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/27832567/comparison-of-bioreactance-non-invasive-cardiac-output-measurements-with-cardiac-magnetic-resonance-imaging
#9
F Trinkmann, C Schneider, J D Michels, K Stach, C Doesch, S O Schoenberg, M Borggrefe, J Saur, T Papavassiliu
Impedance cardiography measurement of cardiac output gained wide interest due to its ease of use and non-invasiveness. However, validation studies of different algorithms yielded diverging results. Bioreactance (BR) as a recent adaption differs fundamentally as the flow signal is derived from phase shifts. Our aim was to assess the accuracy and reproducibility of BR, as compared to the non-invasive gold standard--cardiac magnetic resonance imaging (CMR). We prospectively included 32 stable patients. BR was performed twice in the supine position and averaged over 30 seconds...
November 2016: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/27810293/usefulness-of-stroke-volume-monitoring-during-upright-ramp-incremental-cycle-exercise-in-young-patients-with-fontan-circulation
#10
Antoine Legendre, Aurore Guillot, Magalie Ladouceur, Damien Bonnet
BACKGROUND: Aerobic capacity (VO2 max) of patients with Fontan circulation (FC) is lowest within patients with congenital heart disease. The reasons have not been completely elucidated. METHODS: Twenty five young patients with non-failing FC underwent a cardiopulmonary test during an upright ramp cycling. By using a signal morphology impedance cardiography device (physioflow®), stroke volume (SV) was evaluated along with effort. The results were compared with paired healthy controls...
January 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27784687/dietary-nitrate-supplementation-and-exercise-tolerance-in-patients-with-heart-failure-with-reduced-ejection-fraction
#11
Daniel M Hirai, Joel T Zelt, Joshua H Jones, Luiza G Castanhas, Robert F Bentley, Wendy Earle, Patti Staples, Michael E Tschakovsky, John McCans, Denis E O'Donnell, J Alberto Neder
Endothelial dysfunction and reduced nitric oxide (NO) signaling are key abnormalities leading to skeletal muscle oxygen delivery-utilization mismatch and poor physical capacity in patients with heart failure with reduced ejection fraction (HFrEF). Oral inorganic nitrate supplementation provides an exogenous source of NO that may enhance locomotor muscle function and oxygenation with consequent improvement in exercise tolerance in HFrEF. Thirteen patients (left ventricular ejection fraction ≤40%) were enrolled in a double-blind, randomized crossover study to receive concentrated nitrate-rich (nitrate) or nitrate-depleted (placebo) beetroot juice for 9 days...
January 1, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27721369/applicability-of-impedance-cardiography-during-heart-failure-flare-ups
#12
Saulius Sadauskas, Albinas Naudžiūnas, Alvydas Unikauskas, Edita Mašanauskienė, Giedrė Bakšytė, Andrius Macas
BACKGROUND Heart failure (HF) accounts for about 5% of all causes of urgent hospital admissions, and the overall mortality of HF patients within 1 year after hospitalization is 17-45%. Transthoracic impedance cardiography (ICG) is a safe, non-invasive diagnostic technique that helps to detect various parameters that define different cardiac functions. The aim of this study was to investigate the value of ICG parameters in patients hospitalized due to HF flare-ups. MATERIAL AND METHODS The study included 60 patients (24 women and 36 men) who were admitted to intensive care units because of an acute episode of HF without signs of myocardial infarction...
October 9, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27695628/effects-of-acupuncture-stimulation-on-the-radial-artery-s-pressure-pulse-wave-in-healthy-young-participants-protocol-for-a-prospective-single-arm-exploratory-clinical-study
#13
Jae-Young Shin, Jun-Hwan Lee, Boncho Ku, Jang Han Bae, Min-Ho Un, Jaeuk U Kim, Tae-Hun Kim
INTRODUCTION: This study aims to investigate the effects of acupuncture stimulation on the radial artery's pressure pulse wave, along with various hemodynamic parameters, and to explore the possible underlying mechanism of pulse diagnosis in healthy participants in their twenties. METHODS AND ANALYSIS: This study is a prospective, single-arm, exploratory clinical study. A total of 25 healthy participants, without regard to gender, in their twenties will be recruited by physicians...
September 2016: Journal of Pharmacopuncture
https://www.readbyqxmd.com/read/27680816/g5-12-week-cardiovascular-profiles-differ-between-patients-with-essential-hypertension-gestational-hypertension-late-preeclampsia-and-intra-uterine-growth-retardation
#14
S Vonck, J Oben, A S Staelens, D Lanssens, K Tomsin, W Gyselaers
INTRODUCTION: Maternal cardiovascular adaptations are mandatory for a normal course of pregnancy. Disturbed adaptations predispose to gestational complications further in pregnancy such as hypertension disorders and/or fetal growth restriction. We aim to explore the early gestational cardiovascular profile in uncomplicated pregnancy, in gestational hypertensive disorders and isolated intra-uterine growth retardation. METHODS: Cardiovascular assessments were done using a standard protocol with impedance cardiography (Niccomo, SonoSite, MedisMedinizinischeMesstechnik GmbH, Ilmenau, Germany) and bio-impedance (Maltron BIOSCAN 920-II; Maltron International LTD, Essex, UK) around 12 weeks of gestation...
August 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27620621/elucidating-the-hemodynamic-origin-of-ballistocardiographic-forces-toward-improved-monitoring-of-cardiovascular-health-at-home
#15
Abdul Qadir Javaid, Hazar Ashouri, Srini Tridandapani, Omer T Inan
The ballistocardiogram (BCG), a signal describing the reaction forces of the body to cardiac ejection of blood, has recently gained interest in the research community as a potential tool for monitoring the mechanical aspects of cardiovascular health for patients at home and during normal activities of daily living. An important limitation in the field of BCG research is that while the BCG signal measures the forces of the body, the information desired (and understood) by clinicians and caregivers, regarding mechanical health of the cardiovascular system, is typically expressed as blood pressure or flow...
2016: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/27614883/cardiac-stroke-volume-variability-measured-non-invasively-by-three-methods-for-detection-of-central-hypovolemia-in-healthy-humans
#16
Nathalie Linn Anikken Holme, Erling Bekkestad Rein, Maja Elstad
PURPOSE: Hypovolemia decreases preload and cardiac stroke volume. Cardiac stroke volume (SV) and its variability (cardiac stroke volume variability, SVV) have been proposed as clinical tools for detection of acute hemorrhage. We compared three non-invasive SV measurements and investigated if respiration-induced fluctuations in SV may detect mild and moderate hypovolemia in spontaneously breathing humans. METHODS: Ten healthy subjects underwent experimental central hypovolemia induced by lower body negative pressure to -60 mmHg or onset of presyncopal symptoms...
December 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27568363/psychophysiological-correlates-of-systemic-inflammation-in-black-and-white-men
#17
Kimberly G Lockwood, J Richard Jennings, Karen A Matthews
Inflammation plays a critical role in the pathophysiology of cardiovascular disease (CVD) and levels of circulating inflammatory markers are associated with future CVD risk. However, the physiological mechanisms that control systemic levels of circulating inflammatory markers are not well understood. Here, we explore possible autonomic nervous system mechanisms by testing whether resting and stressor-evoked cardiovascular responses are associated with two markers of systemic inflammation: interleukin (IL)-6 and C-reactive protein (CRP)...
January 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27562130/evaluation-of-impedance-cardiography-for-measurement-of-stroke-volume-in-congenital-heart-disease
#18
Mohammed Ebrahim, Sanjeet Hegde, Beth Printz, Mark Abcede, James A Proudfoot, Christopher Davis
Noninvasive measurement of cardiac output (CO) and particularly stroke volume (SV) remain difficult but potentially valuable. These variables can be particularly challenging to measure in children with congenital heart disease (CHD). Impedance cardiography (IC) is a technique shown to be accurate in measuring SV in adults and in children with structurally normal hearts. The ease of use and rapidity of SV measurement using IC makes it potentially attractive for young patients with CHD. Advances in IC technology have led to more sophisticated signal-morphology IC (SMIC) devices that may further improve accuracy...
December 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27559316/cerebro-and-cardio-vascular-responses-to-energy-drink-in-young-adults-is-there-a-gender-effect
#19
Cathríona R Monnard, Jean-Pierre Montani, Erik K Grasser
BACKGROUND AND PURPOSE: Energy drinks (EDs) are suspected to induce potential adverse cardiovascular effects and have recently been shown to reduce cerebral blood flow velocity (CBFV) in young, healthy subjects. Gender differences in CBFV in response to EDs have not previously been investigated, despite the fact that women are more prone to cardiovascular disturbances such as neurocardiogenic syncope than men. Therefore, the aim of this study was to explore gender differences in cerebrovascular and cardiovascular responses to EDs...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27558771/association-of-central-sleep-apnea-with-impaired-heart-structure-and-cardiovascular-hemodynamics-in-patients-with-chronic-heart-failure
#20
Anna Kazimierczak, Paweł Krzesiński, Grzegorz Gielerak, Beata Uziębło-Życzkowska, Paweł Smurzyński, Robert Ryczek, Andrzej Cwetsch, Andrzej Skrobowski
BACKGROUND Advanced heart failure (HF) is commonly accompanied by central sleep apnea (CSA) with Cheyne-Stokes respiration (CSR). The aim of this study was to evaluate the relationship between CSA/CSR and other clinical features of HF, with particular emphasis on cardiovascular hemodynamics. MATERIAL AND METHODS In 161 stable HF patients with left ventricular ejection fraction (LVEF) ≤45% (NYHA class I-III; mean LVEF 32.8%) the clinical evaluation included: LVEF; left and right ventricular end-diastolic diameter (LVDd, RVDd); ratio of early transmitral flow velocity to early diastolic septal mitral annulus velocity (E/e') assessed by echocardiography; stroke index (SI); heart rate (HR); cardiac index (CI); and systemic vascular resistance index (SVRI) assessed by impedance cardiography (ICG)...
August 25, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
keyword
keyword
68208
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"