1
|
Zhang Y, Yang X, Sun F, Zhang Y, Yao Y, Bai Z, Yu J, Liu X, Zhao Q, Li X, Bao J. Emotional "Contagion" in Piglets after Sensory Avoidance of Rewarding and Punishing Treatment. Animals (Basel) 2024; 14:1110. [PMID: 38612349 PMCID: PMC11011006 DOI: 10.3390/ani14071110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
In the pig farming industry, it is recommended to avoid groups when treating individuals to reduce adverse reactions in the group. However, can this eliminate the adverse effects effectively? Piglets were assigned to the Rewarding Group (RG), the Punishing Group (PG), and the Paired Control Group (PCG). There were six replicates in each group, with two paired piglets per replicate. One piglet of the RG and PG was randomly selected as the Treated pig (TP), treated with food rewards or electric shock, and the other as the Naive pig (NP). The NPs in the RG and PG were unaware of the treatment process, and piglets in the PCG were not treated. The behavior and heart rate changes of all piglets were recorded. Compared to the RG, the NPs in the PG showed longer proximity but less contact behavior, and the TPs in the PG showed more freezing behavior. The percentage change in heart rate of the NPs was synchronized with the TPs. This shows that after sensory avoidance, the untreated pigs could also feel the emotions of their peers and their emotional state was affected by their peers, and the negative emotions in the pigs lasted longer than the positive emotions. The avoidance process does not prevent the transfer of negative emotions to peers via emotional contagion from the stimulated pig.
Collapse
Affiliation(s)
- Ye Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Xuesong Yang
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Fang Sun
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Yaqian Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Yuhan Yao
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Ziyu Bai
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Jiaqi Yu
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Xiangyu Liu
- College of Life Science, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China;
| | - Qian Zhao
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Xiang Li
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| | - Jun Bao
- College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China; (Y.Z.); (X.Y.); (F.S.); (Y.Z.); (Y.Y.); (Z.B.); (J.Y.); (Q.Z.)
| |
Collapse
|
2
|
Trending ability of cardiac output measurements using electrical cardiometry during abdominal surgery: A cohort study. Eur J Anaesthesiol 2022; 39:619-622. [PMID: 35759293 DOI: 10.1097/eja.0000000000001653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Kenny JÉS, Barjaktarevic I, Eibl AM, Parrotta M, Long BF, Elfarnawany M, Eibl JK. Temporal concordance between pulse contour analysis, bioreactance and carotid doppler during rapid preload changes. PLoS One 2022; 17:e0265711. [PMID: 35320307 PMCID: PMC8942202 DOI: 10.1371/journal.pone.0265711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/07/2022] [Indexed: 11/18/2022] Open
Abstract
Purpose
We describe the temporal concordance of 3 hemodynamic monitors.
Materials and methods
Healthy volunteers performed preload changes while simultaneously wearing a non-invasive, pulse-contour stroke volume (SV) monitor, a bioreactance SV monitor and a wireless, wearable Doppler ultrasound patch over the common carotid artery. The sensitivity and specificity for detecting preload change over 3 temporal windows (early, middle and late) was assessed.
Results
40 preload changes were recorded in total (20 increase, 20 decrease). Immediately, the wearable Doppler had high sensitivity (100%) and specificity (100%) for detecting preload change with an area under the receiver operator curve (AUROC) of 0.98 for both velocity time integral (VTI, 10.5% threshold) and corrected flow time (FTc, 2.5% threshold). The sensitivity, specificity and AUROC for non-invasive pulse contour were equally good (9% SV threshold). For bioreactance, a 13% SV threshold immediately detected preload change with a sensitivity, specificity and AUROC of 60%, 95% and 0.75, respectively. After two SV outputs following preload change, the sensitivity, specificity and AUROC of bioreactance improved to 70%, 90% and 0.85, respectively.
Conclusions
Carotid Doppler ultrasound and non-invasive pulse contour detected rapid hemodynamic change with equal accuracy; bioreactance improved over time. Algorithm-lag should be considered when interpreting clinical studies.
Collapse
Affiliation(s)
| | - Igor Barjaktarevic
- Division of Pulmonary and Critical Care, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
| | - Andrew M. Eibl
- Health Sciences North Research Institute, Sudbury, ON, Canada
| | | | - Bradley F. Long
- Health Sciences North Research Institute, Sudbury, ON, Canada
- Northern Ontario School of Medicine, Sudbury, ON, Canada
| | - Mai Elfarnawany
- Health Sciences North Research Institute, Sudbury, ON, Canada
| | - Joseph K. Eibl
- Health Sciences North Research Institute, Sudbury, ON, Canada
- Northern Ontario School of Medicine, Sudbury, ON, Canada
| |
Collapse
|
4
|
Cheung CHY, Khaw ML, Leung WS, Tam SY, Chu CY, Lee CK, Lee SWY. Effects of Performing Applied Muscle Tension during Recovery after Phlebotomy in Young, First-Time Donors: A Pilot Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph181910541. [PMID: 34639841 PMCID: PMC8508044 DOI: 10.3390/ijerph181910541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/26/2021] [Accepted: 09/29/2021] [Indexed: 12/02/2022]
Abstract
Vasovagal reaction (VVR) compromises donor safety and reduces the subsequent return rates. Performing applied muscle tension (AMT) during phlebotomy may reduce the incidence of VVR. However, the effectiveness of performing AMT after phlebotomy to reduce delayed VVR remains unclear. With ethics approval, 12 young, first-time donors (YFTD) were recruited to study the effects on stroke volume (SV), cardiac output (CO) and systemic vascular resistance (SVR) while performing AMT from needle insertion to end of recovery. Measurements from 12 matched control YFTD were used for comparison. Pre-donation anxiety and VVR severity were assessed. Compared to controls, donors who performed AMT had higher SV (Control: 57 mL vs. AMT: 69 mL, p = 0.045), higher CO (Control: 3.7 L·min−1 vs. AMT: 5.2 L·min−1, p = 0.006) and lower SVR (Control: 1962 dyn·s·cm−5 vs. AMT: 1569 dyn·s·cm−5, p = 0.032) during mid-phlebotomy. During recovery, the AMT group retained higher SV, higher CO and lower SVR than the control, but not reaching statistical significance. Practicing AMT during recovery resulted in sustained haemodynamic improvements beyond the donation period, despite the reduction in delayed VVR was insignificant compared to the control group. A larger sample size is needed to validate the effectiveness of performing AMT after donation to mitigate delayed VVR.
Collapse
Affiliation(s)
- Cara H. Y. Cheung
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (C.H.Y.C.); (W.S.L.); (S.Y.T.)
| | - May L. Khaw
- Tasmanian School of Medicine, University of Tasmania, Hobart, TAS 7005, Australia;
| | - Wan Shun Leung
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (C.H.Y.C.); (W.S.L.); (S.Y.T.)
| | - Shing Yau Tam
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (C.H.Y.C.); (W.S.L.); (S.Y.T.)
| | - Chui Yee Chu
- Blood Collection and Donor Recruitment Department, Hong Kong Red Cross Blood Transfusion Service, HA, Hong Kong, China; (C.Y.C.); (C.K.L.)
| | - Cheuk Kwong Lee
- Blood Collection and Donor Recruitment Department, Hong Kong Red Cross Blood Transfusion Service, HA, Hong Kong, China; (C.Y.C.); (C.K.L.)
| | - Shara W. Y. Lee
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (C.H.Y.C.); (W.S.L.); (S.Y.T.)
- Correspondence: ; Tel.: +852-3400-8592
| |
Collapse
|
5
|
Leprêtre PM, Myers J. Reply to Phillips' response to commentary on USCOM 1A Doppler and Physioflow bioimpedance hemodynamic monitoring in athletes during head-up tilt tests. J Appl Physiol (1985) 2021; 131:354-355. [PMID: 34275324 DOI: 10.1152/japplphysiol.00379.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Pierre-Marie Leprêtre
- Research Unit Physiological Responses and Exercise Rehabilitation, University of Picardie Jules Verne, Amiens, France.,Unit of Cardiovascular Rehabilitation, Hospital Center of Corbie, Picardy Association for Cardiac Rehabilitation Research, Corbie, France
| | - Jonathan Myers
- Department of Veterans Affairs Medical Center, School of Medicine, Stanford University, Palo Alto, California
| |
Collapse
|
6
|
Phillips R. Response to commentary on USCOM 1A Doppler and PhysioFlow bioimpedance hemodynamic monitoring in athletes during head-up tilt tests. J Appl Physiol (1985) 2021; 131:352-353. [PMID: 34275338 DOI: 10.1152/japplphysiol.00260.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Rob Phillips
- Critical Care Research Group, School of Medicine, grid.1003.2University of Queensland, Brisbane, Queensland, Australia
| |
Collapse
|
7
|
Lee DCW, Sheridan S, Ali A, Sutanto D, Wong SHS. Wearing compression tights post-exercise enhances recovery hemodynamics and subsequent cycling performance. Eur J Appl Physiol 2021; 121:2091-2100. [PMID: 33835198 DOI: 10.1007/s00421-021-04661-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 03/01/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE To investigate sports compression garment (CG)-induced recovery hemodynamics and their potential impact on subsequent cycling performance. METHODS In a randomized crossover design, 13 physically active men (20.9 ± 1.4 years; 65.9 ± 7.8 kg; 173.3 ± 4.8 cm; peak power output 254.2 ± 27.2 W) underwent 2 experimental trials. During each experimental trial, the subjects performed 20-min fatiguing preload cycling followed by 60-min passive recovery wearing either a sports CG (28.6 ± 9.4 mmHg) or gymnastic pants (CON). A 5-min all-out cycling performance test was subsequently conducted and power output and cadence were recorded. Cardiac output (CO) and stroke volume (SV) were measured using Doppler ultrasound (USCOM®). Heart rate (HR), blood lactate [BLa-], ratings of perceived exertion (RPE), leg muscle soreness (LMS), mean arterial pressure (MAP) and systemic vascular resistance (SVR) were monitored at 5, 15, 30, 45, 60 min during passive recovery. RESULTS During the subsequent 5-min all-out cycling performance test, power output (215.2 ± 24.0 vs. 210.8 ± 21.5 W, CG vs. CON) and cadence (72.5 ± 3.8 vs. 71.2 ± 4.8 rpm, CG vs. CON) were higher in CG than CON (P < 0.05). SV was higher at 15, 30 and 45 min (P < 0.05), CO was higher at 5 and 45 min (P < 0.05), HR was lower at 15 and 30 min (P < 0.05) and [BLa-] was lower at 5 and 15 min (P < 0.05) during passive recovery, while LMS was lower at all time-points (P < 0.05) compared with CON. CONCLUSION Sports CG improves subsequent cycling performance by enhancing hemodynamic responses and attenuating perceived muscle soreness during passive recovery in physically active men.
Collapse
Affiliation(s)
- Daniel C W Lee
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong.,Elite Training Science and Technology Division, Hong Kong Sports Institute, Shatin, Hong Kong
| | - Sinead Sheridan
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ajmol Ali
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong.,School of Sport, Exercise and Nutrition, Massey University, Palmerston North, New Zealand
| | - Damien Sutanto
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Stephen H S Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong.
| |
Collapse
|
8
|
Myers J, Leprêtre PM. Commentary on “Performance evaluation of a portable bioimpedance cardiac output monitor for measuring hemodynamic changes in athletes during a head-up tilt test”. J Appl Physiol (1985) 2021; 130:671-672. [DOI: 10.1152/japplphysiol.00873.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Jonathan Myers
- Department of Veterans Affairs Medical Center, School of Medicine. Stanford University, Cardiology Section, Palo Alto, California
| | - Pierre-Marie Leprêtre
- University of Picardie Jules Verne, UFR-STAPS, Research Unit Physiological Responses and Exercise Readaptation, Amiens, France
- Hospital Center of Corbie, Unit of Cardiovascular Rehabilitation, Corbie, France
| |
Collapse
|
9
|
Cheung CHY, Khaw ML, Tam VCW, Ying MTC, Lee SWY. Performance evaluation of a portable bioimpedance cardiac output monitor for measuring hemodynamic changes in athletes during a head-up tilt test. J Appl Physiol (1985) 2020; 128:1146-1152. [DOI: 10.1152/japplphysiol.00822.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The use of impedance cardiography to monitor physiological changes in sports is rarely reported. Using head-up tilt test, we evaluated a portable noninvasive impedance cardiography device (PhysioFlow) by comparing it with a reference Doppler monitor (USCOM). Accuracy in tracking hemodynamic changes deteriorated with higher tilt, implying a gravitational influence on its performance. Stroke volume measurements were overestimated, but the changes were underestimated. Despite its convenient physical features, the suitability of PhysioFlow for sports use is questionable.
Collapse
Affiliation(s)
- Cara H. Y. Cheung
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - May L. Khaw
- Tasmanian School of Medicine, University of Tasmania, Hobart, Tasmania
| | - Victor C. W. Tam
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Michael T. C. Ying
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Shara W. Y. Lee
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| |
Collapse
|
10
|
Williams ND, Brady R, Gilmore S, Gremaud P, Tran HT, Ottesen JT, Mehlsen J, Olufsen MS. Cardiovascular dynamics during head-up tilt assessed via pulsatile and non-pulsatile models. J Math Biol 2019; 79:987-1014. [PMID: 31152210 DOI: 10.1007/s00285-019-01386-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 05/09/2019] [Indexed: 11/28/2022]
Abstract
This study develops non-pulsatile and pulsatile models for the prediction of blood flow and pressure during head-up tilt. This test is used to diagnose potential pathologies within the autonomic control system, which acts to keep the cardiovascular system at homeostasis. We show that mathematical modeling can be used to predict changes in cardiac contractility, vascular resistance, and arterial compliance, quantities that cannot be measured but are useful to assess the system's state. These quantities are predicted as time-varying parameters modeled using piecewise linear splines. Having models with various levels of complexity formulated with a common set of parameters, allows us to combine long-term non-pulsatile simulations with pulsatile simulations on a shorter time-scale. We illustrate results for a representative subject tilted head-up from a supine position to a [Formula: see text] angle. The tilt is maintained for 5 min before the subject is tilted back down. Results show that if volume data is available for all vascular compartments three parameters can be identified, cardiovascular resistance, vascular compliance, and ventricular contractility, whereas if model predictions are made against arterial pressure and cardiac output data alone, only two parameters can be estimated either resistance and contractility or resistance and compliance.
Collapse
Affiliation(s)
- Nakeya D Williams
- Mathematical Sciences Department, United States Military Academy, West Point, NY, USA
| | - Renee Brady
- Department of Integrated Mathematical Oncology, H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Steven Gilmore
- Department of Mathematics, NC State University, Raleigh, NC, USA
| | - Pierre Gremaud
- Department of Mathematics, NC State University, Raleigh, NC, USA
| | - Hien T Tran
- Department of Mathematics, NC State University, Raleigh, NC, USA
| | - Johnny T Ottesen
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Jesper Mehlsen
- Surgical Pathophysiology Unit, Rigshospitalet, Copenhagen, Denmark
| | - Mette S Olufsen
- Department of Mathematics, NC State University, Raleigh, NC, USA.
| |
Collapse
|
11
|
Williams ND, Mehlsen J, Tran HT, Olufsen MS. An optimal control approach for blood pressure regulation during head-up tilt. BIOLOGICAL CYBERNETICS 2019; 113:149-159. [PMID: 30377766 PMCID: PMC6417936 DOI: 10.1007/s00422-018-0783-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 09/29/2018] [Indexed: 05/22/2023]
Abstract
This paper presents an optimal control approach to modeling effects of cardiovascular regulation during head-up tilt (HUT). Many patients who suffer from dizziness or light-headedness are administered a head-up tilt test to explore potential deficits within the autonomic control system, which maintains the cardiovascular system at homeostasis. This system is complex and difficult to study in vivo, and thus we propose to use mathematical modeling to achieve a better understanding of cardiovascular regulation during HUT. In particular, we show the feasibility of using optimal control theory to compute physiological control variables, vascular resistance and cardiac contractility, quantities that cannot be measured directly, but which are useful to assess the state of the cardiovascular system. A non-pulsatile lumped parameter model together with pseudo- and clinical data are utilized in the optimal control problem formulation. Results show that the optimal control approach can predict time-varying quantities regulated by the cardiovascular control system. Our results compare favorable to our previous study using a piecewise linear spline approach, less a priori knowledge is needed, and results were obtained at a significantly lower computational cost.
Collapse
Affiliation(s)
| | - Jesper Mehlsen
- Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | | | | |
Collapse
|
12
|
Lee DC, Lee SW, Khaw K, Ali A, Sheridan SE, Wong SH. Haemodynamic responses of wearing low-pressure sports compression tights during an orthostatic challenge in healthy individuals. J Sci Med Sport 2018; 21:1062-1067. [DOI: 10.1016/j.jsams.2017.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 11/16/2017] [Accepted: 12/08/2017] [Indexed: 10/18/2022]
|
13
|
KROHOVA J, CZIPPELOVA B, TURIANIKOVA Z, LAZAROVA Z, TONHAJZEROVA I, JAVORKA M. Preejection Period as a Sympathetic Activity Index: a Role of Confounding Factors. Physiol Res 2017; 66:S265-S275. [DOI: 10.33549/physiolres.933682] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
In previous studies, one of the systolic time intervals – preejection period (PEP) – was used as an index of sympathetic activity reflecting the cardiac contractility. However, PEP could be also influenced by several other cardiovascular variables including preload, afterload and diastolic blood pressure (DBP). The aim of this study was to assess the behavior of the PEP together with other potentially confounding cardiovascular system characteristics in healthy humans during mental and orthostatic stress (head-up tilt test – HUT). Forty-nine healthy volunteers (28 females, 21 males, mean age 18.6 years (SD=1.8 years)) participated in the study. We recorded finger arterial blood pressure by volume-clamp method (Finometer Pro, FMS, Netherlands), PEP, thoracic fluid content (TFC) – a measure of preload, and cardiac output (CO) by impedance cardiography (CardioScreen® 2000, Medis, Germany). Systemic vascular resistance (SVR) – a measure of afterload – was calculated as a ratio of mean arterial pressure and CO. We observed that during HUT, an expected decrease in TFC was accompanied by an increase of PEP, an increase of SVR and no significant change in DBP. During mental stress, we observed a decrease of PEP and an increase of TFC, SVR and DBP. Correlating a change in assessed measures (delta values) between mental stress and previous supine rest, we found that ΔPEP correlated negatively with ΔCO and positively with ΔSVR. In orthostasis, no significant correlation between ΔPEP and ΔDBP, ΔTFC, ΔCO, ΔMBP or ΔSVR was found. We conclude that despite an expected increase of sympathetic activity during both challenges, PEP behaved differently indicating an effect of other confounding factors. To interpret PEP values properly, we recommend simultaneously to measure other variables influencing this cardiovascular measure.
Collapse
Affiliation(s)
- J. KROHOVA
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | | | | | | | | | | |
Collapse
|
14
|
Saugel B, Bendjelid K, Critchley LA, Rex S, Scheeren TWL. Journal of Clinical Monitoring and Computing 2016 end of year summary: cardiovascular and hemodynamic monitoring. J Clin Monit Comput 2017; 31:5-17. [PMID: 28064413 DOI: 10.1007/s10877-017-9976-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Accepted: 01/02/2017] [Indexed: 12/29/2022]
Abstract
The assessment and optimization of cardiovascular and hemodynamic variables is a mainstay of patient management in the care for critically ill patients in the intensive care unit (ICU) or the operating room (OR). It is, therefore, of outstanding importance to meticulously validate technologies for hemodynamic monitoring and to study their applicability in clinical practice and, finally, their impact on treatment decisions and on patient outcome. In this regard, the Journal of Clinical Monitoring and Computing (JCMC) is an ideal platform for publishing research in the field of cardiovascular and hemodynamic monitoring. In this review, we highlight papers published last year in the JCMC in order to summarize and discuss recent developments in this research area.
Collapse
Affiliation(s)
- Bernd Saugel
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
| | - Karim Bendjelid
- Department of Anesthesiology and Intensive Care, Geneva University Hospitals, Geneva, Switzerland
| | - Lester A Critchley
- Department of Anesthesia and Intensive Care, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Steffen Rex
- Department of Anesthesiology and Department of Cardiovascular Sciences, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Thomas W L Scheeren
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| |
Collapse
|
15
|
Innovative noninvasive hemodynamic monitoring: curb your enthusiasm after initial validation studies and evaluate the technologies' clinical applicability. J Clin Monit Comput 2016; 30:509-10. [PMID: 26910237 DOI: 10.1007/s10877-016-9852-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 02/21/2016] [Indexed: 01/08/2023]
|