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Hossein A, Abdessater E, Balali P, Cosneau E, Gorlier D, Rabineau J, Almorad A, Faoro V, van de Borne P. Smartphone-Derived Seismocardiography: Robust Approach for Accurate Cardiac Energy Assessment in Patients with Various Cardiovascular Conditions. Sensors (Basel) 2024; 24:2139. [PMID: 38610349 PMCID: PMC11014030 DOI: 10.3390/s24072139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/19/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024]
Abstract
Seismocardiography (SCG), a method for measuring heart-induced chest vibrations, is gaining attention as a non-invasive, accessible, and cost-effective approach for cardiac pathologies, diagnosis, and monitoring. This study explores the integration of SCG acquired through smartphone technology by assessing the accuracy of metrics derived from smartphone recordings and their consistency when performed by patients. Therefore, we assessed smartphone-derived SCG's reliability in computing median kinetic energy parameters per record in 220 patients with various cardiovascular conditions. The study involved three key procedures: (1) simultaneous measurements of a validated hardware device and a commercial smartphone; (2) consecutive smartphone recordings performed by both clinicians and patients; (3) patients' self-conducted home recordings over three months. Our findings indicate a moderate-to-high reliability of smartphone-acquired SCG metrics compared to those obtained from a validated device, with intraclass correlation (ICC) > 0.77. The reliability of patient-acquired SCG metrics was high (ICC > 0.83). Within the cohort, 138 patients had smartphones that met the compatibility criteria for the study, with an observed at-home compliance rate of 41.4%. This research validates the potential of smartphone-derived SCG acquisition in providing repeatable SCG metrics in telemedicine, thus laying a foundation for future studies to enhance the precision of at-home cardiac data acquisition.
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Affiliation(s)
- Amin Hossein
- Laboratory of Physics and Physiology, Université Libre de Bruxelles, 1050 Brussels, Belgium
- Cardio-Pulmonary Exercise Laboratory, Faculty of Motor Sciences, Université Libre de Bruxelles, Erasme Campus, Anderlecht, 1070 Brussels, Belgium
| | - Elza Abdessater
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, 1050 Bruxelles, Belgium
| | - Paniz Balali
- Laboratory of Physics and Physiology, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | | | | | - Jérémy Rabineau
- Laboratory of Physics and Physiology, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - Alexandre Almorad
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium
| | - Vitalie Faoro
- Cardio-Pulmonary Exercise Laboratory, Faculty of Motor Sciences, Université Libre de Bruxelles, Erasme Campus, Anderlecht, 1070 Brussels, Belgium
| | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, 1050 Bruxelles, Belgium
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Morra S, Pitisci L, Su F, Hossein A, Rabineau J, Racape J, Gorlier D, Migeotte PF, Creteur J, Van De Borne P. QUANTIFICATION OF CARDIAC KINETIC ENERGY AND ITS CHANGES DURING TRANSMURAL MYOCARDIAL INFARCTION ASSESSED BY MULTI-DIMENSIONAL SEISMOCARDIOGRAPHY. J Hypertens 2021. [DOI: 10.1097/01.hjh.0000745452.31495.bd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Morra S, Pitisci L, Su F, Hossein A, Rabineau J, Racape J, Gorlier D, Herpain A, Migeotte PF, Creteur J, van de Borne P. Quantification of Cardiac Kinetic Energy and Its Changes During Transmural Myocardial Infarction Assessed by Multi-Dimensional Seismocardiography. Front Cardiovasc Med 2021; 8:603319. [PMID: 33763456 PMCID: PMC7982421 DOI: 10.3389/fcvm.2021.603319] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 02/08/2021] [Indexed: 11/24/2022] Open
Abstract
Introduction: Seismocardiography (SCG) records cardiac and blood-induced motions transmitted to the chest surface as vibratory phenomena. Evidences demonstrate that acute myocardial ischemia (AMI) profoundly affects the SCG signals. Multidimensional SCG records cardiac vibrations in linear and rotational dimensions, and scalar parameters of kinetic energy can be computed. We speculate that AMI and revascularization profoundly modify cardiac kinetic energy as recorded by SCG. Methods: Under general anesthesia, 21 swine underwent 90 min of myocardial ischemia induced by percutaneous sub-occlusion of the proximal left anterior descending (LAD) coronary artery and subsequent revascularization. Invasive hemodynamic parameters were continuously recorded. SCG was recorded during baseline, immediately and 80 min after LAD sub-occlusion, and immediately and 60 min after LAD reperfusion. iK was automatically computed for each cardiac cycle (iKCC) in linear (iKLin) and rotational (iKRot) dimensions. iK was calculated as well during systole and diastole (iKSys and iKDia, respectively). Echocardiography was performed at baseline and after revascularization, and the left ventricle ejection fraction (LVEF) along with regional left ventricle (LV) wall abnormalities were evaluated. Results: Upon LAD sub-occlusion, 77% of STEMI and 24% of NSTEMI were observed. Compared to baseline, troponins increased from 13.0 (6.5; 21.3) ng/dl to 170.5 (102.5; 475.0) ng/dl, and LVEF dropped from 65.0 ± 0.0 to 30.6 ± 5.7% at the end of revascularization (both p < 0.0001). Regional LV wall abnormalities were observed as follows: anterior MI, 17.6% (three out of 17); septal MI, 5.8% (one out of 17); antero-septal MI, 47.1% (eight out of 17); and infero-septal MI, 29.4% (five out of 17). In the linear dimension, iKLinCC, iKLinSys, and iKLinDia dropped by 43, 52, and 53%, respectively (p < 0.0001, p < 0.0001, and p = 0.03, respectively) from baseline to the end of reperfusion. In the rotational dimension, iKRotCC and iKRotSys dropped by 30 and 36%, respectively (p = 0.0006 and p < 0.0001, respectively), but iKRotDia did not change (p = 0.41). All the hemodynamic parameters, except the pulmonary artery pulse pressure, were significantly correlated with the parameters of iK, except for the diastolic component. Conclusions: In this very context of experimental AMI with acute LV regional dysfunction and no concomitant AMI-related heart valve disease, linear and rotational iK parameters, in particular, systolic ones, provide reliable information on LV contractile dysfunction and its effects on the downstream circulation. Multidimensional SCG may provide information on the cardiac contractile status expressed in terms of iK during AMI and reperfusion. This automatic system may empower health care providers and patients to remotely monitor cardiovascular status in the near future.
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Affiliation(s)
- Sofia Morra
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Lorenzo Pitisci
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Experimental Laboratory of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Fuhong Su
- Experimental Laboratory of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Amin Hossein
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles, Brussels, Belgium
| | - Jérémy Rabineau
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles, Brussels, Belgium
| | - Judith Racape
- Research Center in Epidemiology, Biostatistics and Clinical Research, School of Public Health, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Damien Gorlier
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles, Brussels, Belgium
| | - Antoine Herpain
- Experimental Laboratory of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | | | - Jacques Creteur
- Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
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Hossein A, Rabineau J, Gorlier D, Del Rio JIJ, van de Borne P, Migeotte PF, Nonclercq A. Kinocardiography Derived from Ballistocardiography and Seismocardiography Shows High Repeatability in Healthy Subjects. Sensors (Basel) 2021; 21:815. [PMID: 33530417 PMCID: PMC7865512 DOI: 10.3390/s21030815] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 01/14/2023]
Abstract
Recent years have witnessed an upsurge in the usage of ballistocardiography (BCG) and seismocardiography (SCG) to record myocardial function both in normal and pathological populations. Kinocardiography (KCG) combines these techniques by measuring 12 degrees-of-freedom of body motion produced by myocardial contraction and blood flow through the cardiac chambers and major vessels. The integral of kinetic energy (iK) obtained from the linear and rotational SCG/BCG signals, and automatically computed over the cardiac cycle, is used as a marker of cardiac mechanical function. The present work systematically evaluated the test-retest (TRT) reliability of KCG iK derived from BCG/SCG signals in the short term (<15 min) and long term (3-6 h) on 60 healthy volunteers. Additionally, we investigated the difference of repeatability with different body positions. First, we found high short-term TRT reliability for KCG metrics derived from SCG and BCG recordings. Exceptions to this finding were limited to metrics computed in left lateral decubitus position where the TRT reliability was moderate-to-high. Second, we found low-to-moderate long-term TRT reliability for KCG metrics as expected and confirmed by blood pressure measurements. In summary, KCG parameters derived from BCG/SCG signals show high repeatability and should be further investigated to confirm their use for cardiac condition longitudinal monitoring.
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Affiliation(s)
- Amin Hossein
- LPHYS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.R.); (D.G.); (P.-F.M.)
- BEAMS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium;
| | - Jérémy Rabineau
- LPHYS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.R.); (D.G.); (P.-F.M.)
| | - Damien Gorlier
- LPHYS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.R.); (D.G.); (P.-F.M.)
| | - Jose Ignacio Juarez Del Rio
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.I.J.D.R.); (P.v.d.B.)
| | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.I.J.D.R.); (P.v.d.B.)
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Morra S, Hossein A, Rabineau J, Gorlier D, Racape J, Migeotte PF, van de Borne P. Assessment of left ventricular twist by 3D ballistocardiography and seismocardiography compared with 2D STI echocardiography in a context of enhanced inotropism in healthy subjects. Sci Rep 2021; 11:683. [PMID: 33436841 PMCID: PMC7804966 DOI: 10.1038/s41598-020-79933-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 12/14/2020] [Indexed: 12/17/2022] Open
Abstract
Ballistocardiography (BCG) and Seismocardiography (SCG) assess the vibrations produced by cardiac contraction and blood flow, respectively, by means of micro-accelerometers and micro-gyroscopes. From the BCG and SCG signals, maximal velocities (VMax), integral of kinetic energy (iK), and maximal power (PMax) can be computed as scalar parameters, both in linear and rotational dimensions. Standard echocardiography and 2-dimensional speckle tracking imaging echocardiography were performed on 34 healthy volunteers who were infused with increasing doses of dobutamine (5-10-20 μg/kg/min). Linear VMax of BCG predicts the rates of left ventricular (LV) twisting and untwisting (both p < 0.0001). The linear PMax of both SCG and BCG and the linear iK of BCG are the best predictors of the LV ejection fraction (LVEF) (p < 0.0001). This result is further confirmed by mathematical models combining the metrics from SCG and BCG signals with heart rate, in which both linear PMax and iK strongly correlate with LVEF (R = 0.7, p < 0.0001). In this setting of enhanced inotropism, the linear VMax of BCG, rather than the VMax of SCG, is the metric which best explains the LV twist mechanics, in particular the rates of twisting and untwisting. PMax and iK metrics are strongly associated with the LVEF and account for 50% of the variance of the LVEF.
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Affiliation(s)
- Sofia Morra
- Department of Cardiovascular Diseases, Erasme Hospital, Université Libre de Bruxelles (ULB), Brussels, Belgium.
| | - Amin Hossein
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles (ULB), Brussels, Belgium.
| | - Jérémy Rabineau
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Damien Gorlier
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Judith Racape
- Research Centre in Epidemiology, Biostatistics and Clinical Research, School of Public Health, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Pierre-François Migeotte
- Laboratory of Physic and Physiology (LPHYS), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Philippe van de Borne
- Department of Cardiovascular Diseases, Erasme Hospital, Université Libre de Bruxelles (ULB), Brussels, Belgium
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Hossein A, Rabineau J, Gorlier D, Pinki F, van de Borne P, Nonclercq A, Migeotte PF. Effects of acquisition device, sampling rate, and record length on kinocardiography during position-induced haemodynamic changes. Biomed Eng Online 2021; 20:3. [PMID: 33407507 PMCID: PMC7788803 DOI: 10.1186/s12938-020-00837-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/10/2020] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Kinocardiography (KCG) is a promising new technique used to monitor cardiac mechanical function remotely. KCG is based on ballistocardiography (BCG) and seismocardiography (SCG), and measures 12 degrees-of-freedom (DOF) of body motion produced by myocardial contraction and blood flow through the cardiac chambers and major vessels. RESULTS The integral of kinetic energy ([Formula: see text]) obtained from the linear and rotational SCG/BCG signals was computed over each dimension over the cardiac cycle, and used as a marker of cardiac mechanical function. We tested the hypotheses that KCG metrics can be acquired using different sensors, and at 50 Hz. We also tested the effect of record length on the ensemble average on which the metrics were computed. Twelve healthy males were tested in the supine, head-down tilt, and head-up tilt positions to expand the haemodynamic states on which the validation was performed. CONCLUSIONS KCG metrics computed on 50 Hz and 1 kHz SCG/BCG signals were very similar. Most of the metrics were highly similar when computed on different sensors, and with less than 5% of error when computed on record length longer than 60 s. These results suggest that KCG may be a robust and non-invasive method to monitor cardiac inotropic activity. Trial registration Clinicaltrials.gov, NCT03107351. Registered 11 April 2017, https://clinicaltrials.gov/ct2/show/NCT03107351?term=NCT03107351&draw=2&rank=1 .
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Affiliation(s)
- Amin Hossein
- LPHYS, Université Libre de Bruxelles, Brussels, Belgium.
- BEAMS, Université Libre de Bruxelles, Brussels, Belgium.
| | | | | | - Farhana Pinki
- LPHYS, Université Libre de Bruxelles, Brussels, Belgium
| | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
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Morra S, Pitisci L, Hossein A, Rabineau J, Gorlier D, Migeotte P, Van De Borne P. Quantification of cardiac kinetic energy and its changes during transmural myocardial ischemia assessed by multi-dimensional seismocardiography. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
The third law of Newton implies that if one body exerts a force on a second body, the latter exerts a force equal in magnitude and opposite in direction on the first body. This reaction to heart and blood motion elicits low frequency vibrations transmitted to the chest surface. Multi-dimensional seismocardiography (SCG) assesses these linear and rotational accelerations by means of micro-accelerometers and micro-gyroscopes. From the linear and rotational acceleration signals, kinetic energy (KE) and its temporal integration (iK) can be computed as scalar parameters, both in a linear (iKLin) and in a rotational (iKRot) dimension. Evidence demonstrate that acute myocardial ischemia (AMI) profoundly affects the SCG waveform amplitude and that unidimensional SCG is accurate for the determination of acute coronary syndrome (ACS). Whether and how AMI affects multidimensional SCG signals is unknwon.
Purpose
AMI upon left anterior descendent coronary artery (LAD) occlusion markedly depresses iKLin and iKRot.
Methods
The protocol was in accordance with the principles of laboratory animal care. After 20 minutes of steady-state, anesthetized Landrance pigs underwent a percutaneous mid-LAD occlusion by means of intra-coronary balloon inflation for 90 min., followed by deflation and reperfusion (RE). SCG was recorded at baseline (BSL), upon LAD occlusion (AMIt0), after 60 min of occlusion (AMIt60), at the onset of LAD reperfusion (REt0) and after 60 min of recovery (REt60). iKLin and iKRot were computed from the amplitudes of SCG waveforms. iKLin and iKRot were calculated during the systolic and diastolic phases of the cardiac cycle (iKSys and iKDia, respectively). Firedman's ANOVA was used to test the trend of the above variables throughout the protocol, followed by Wilcoxon paired tests. Data are presented as median [IR].
Results
Of the 21 investigated pigs, 3 died before protocol termination as a result of AMI complications and 4 had ruled out during the signal processing because of technical reasons. Considering the rotational variables, when compared to baseline, iKRot_Sys decreased by 17% both at AMIt0 (p=0.05) and AMIt60 (p=0.02); by 38% and 49% at REt0 and t60 (respectively, p<0.001). Similarly, iKRot_Dia decreased by 64% and 59% at AMIt0 and AMIt60 (respectively, p<0.02), and by 74% at REt0 and REt60 (both p=0.002). Considering the linear variables, iKLin_Sys decreased by 19% and 34% at AMIt0 and AMIt60 (respectively, p<0.04), by 39% and 53% at REt0 and REt60 (respectively, p<0.02). iKLin_Dia decreased by 42% at AMIt60 (p=0.03) and by 67% at REt60 (p=0.005) compared to baseline but did not change at the other time points (figure 1).
Conclusions
AMI depresses profoundly cardiac kinetic energy as recorded by multidimensional SCG. Thus, this nonintrusive and operator independent tool may prove useful in the detection of AMI and provide considerable opportunities for remote non-intrusive monitoring of cardiac functions.
Funding Acknowledgement
Type of funding source: Private grant(s) and/or Sponsorship. Main funding source(s): Fonds Erasme, FNRS_Fonds National Recherche Scientifique, Fonds pour la Chirurgie Cardiaque, PRODEXA
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Affiliation(s)
- S Morra
- Erasme Hospital (ULB), Brussels, Belgium
| | - L Pitisci
- Erasme Hospital (ULB), Brussels, Belgium
| | - A Hossein
- Université libre de Bruxelles (ULB), Brussels, Belgium
| | - J Rabineau
- Université libre de Bruxelles (ULB), Brussels, Belgium
| | - D Gorlier
- Université libre de Bruxelles (ULB), Brussels, Belgium
| | - P.F Migeotte
- Université libre de Bruxelles (ULB), Brussels, Belgium
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Morra S, Gauthey A, Hossein A, Rabineau J, Racape J, Gorlier D, Migeotte PF, le Polain de Waroux JB, van de Borne P. Influence of sympathetic activation on myocardial contractility measured with ballistocardiography and seismocardiography during sustained end-expiratory apnea. Am J Physiol Regul Integr Comp Physiol 2020; 319:R497-R506. [PMID: 32877240 DOI: 10.1152/ajpregu.00142.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ballistocardiography (BCG) and seismocardiography (SCG) assess vibrations produced by cardiac contraction and blood flow, respectively, through micro-accelerometers and micro-gyroscopes. BCG and SCG kinetic energies (KE) and their temporal integrals (iK) during a single heartbeat are computed in linear and rotational dimensions. Our aim was to test the hypothesis that iK from BCG and SCG are related to sympathetic activation during maximal voluntary end-expiratory apnea. Multiunit muscle sympathetic nerve traffic [burst frequency (BF), total muscular sympathetic nerve activity (tMSNA)] was measured by microneurography during normal breathing and apnea (n = 28, healthy men). iK of BCG and SCG were simultaneously recorded in the linear and rotational dimension, along with oxygen saturation ([Formula: see text]) and systolic blood pressure (SBP). The mean duration of apneas was 25.4 ± 9.4 s. SBP, BF, and tMSNA increased during the apnea compared with baseline (P = 0.01, P = 0.002,and P = 0.001, respectively), whereas [Formula: see text] decreased (P = 0.02). At the end of the apnea compared with normal breathing, changes in iK computed from BCG were related to changes of tMSNA and BF only in the linear dimension (r = 0.85, P < 0.0001; and r = 0.72, P = 0.002, respectively), whereas changes in linear iK of SCG were related only to changes of tMSNA (r = 0.62, P = 0.01). We conclude that maximal end expiratory apnea increases cardiac kinetic energy computed from BCG and SCG, along with sympathetic activity. The novelty of the present investigation is that linear iK of BCG is directly and more strongly related to the rise in sympathetic activity than the SCG, mainly at the end of a sustained apnea, likely because the BCG is more affected by the sympathetic and hemodynamic effects of breathing cessation. BCG and SCG may prove useful to assess sympathetic nerve changes in patients with sleep disturbances.NEW & NOTEWORTHY Ballistocardiography (BCG) and seismocardiography (SCG) assess vibrations produced by cardiac contraction and blood flow, respectively, through micro-accelerometers and micro-gyroscopes. Kinetic energies (KE) and their temporal integrals (iK) during a single heartbeat are computed from the BCG and SCG waveforms in a linear and a rotational dimension. When compared with normal breathing, during an end-expiratory voluntary apnea, iK increased and was positively related to sympathetic nerve traffic rise assessed by microneurography. Further studies are needed to determine whether BCG and SCG can probe sympathetic nerve changes in patients with sleep disturbances.
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Affiliation(s)
- Sofia Morra
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Anais Gauthey
- Department of Cardiology, Saint-Luc hospital, Université Catholique de Louvain, Brussels, Belgium
| | - Amin Hossein
- Laboratory of Physics and Physiology, Université Libre de Bruxelles, Brussels, Belgium
| | - Jérémy Rabineau
- Laboratory of Physics and Physiology, Université Libre de Bruxelles, Brussels, Belgium
| | - Judith Racape
- Research Centre in Epidemiology, Biostatistics and Clinical Research. School of Public Health. Université Libre de Bruxelles, Brussels, Belgium
| | - Damien Gorlier
- Laboratory of Physics and Physiology, Université Libre de Bruxelles, Brussels, Belgium
| | | | | | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
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Morra S, Hossein A, Gorlier D, Rabineau J, Chaumont M, Migeotte PF, Van De Borne P. Ballistocardiography and seismocardiography detection of hemodynamic changes during simulated obstructive apnea. Physiol Meas 2020; 41:065007. [PMID: 32396890 DOI: 10.1088/1361-6579/ab924b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
OBJECTIVE To investigate if modern seismocardiography (SCG) and ballistocardiography (BCG) are useful in the detection of hemodynamic changes occurring during simulated obstructive apneic events. METHODS Forty-seven healthy volunteers performed a voluntary maximum Mueller maneuver (MM) for 10 s, and SCG and BCG signals were simultaneously taken. The kinetic energy of a set of cardiac cycles before and during the apneic episode was automatically computed from the rotational and linear channels of the SCG and BCG waveforms and its temporal integral (i K) was derived (unit of measure: microjoules per second (µJ·s)). The estimated transmural pressure (eP TM ) was assessed as the difference between systemic blood pressure and maximal inspiratory pressure (MIP). The Wilcoxon sign-rank test was used to evaluate differences in energy measurements between normal respiration and the loaded inspiration maneuver. Cardiac kinetic energies and the MIP produced during the MM were compared by linear regression analysis following log transformation in order to assess the correlation between variables. MAIN RESULTS The [Formula: see text] during normal breathing increased from 1.1(0.8; 1.4) to 1.9(1.4; 4.3) µJ·s during MM (p < 0.001). Meanwhile, [Formula: see text] increased from 54 (31; 92) to 84 (44; 153) µJ·s, (p < 0.001). The [Formula: see text] and [Formula: see text] of a set of cardiac cycles during the MM were negatively associated with the MIP (r: -0.59, p < 0.001 and r: -0.53, p = 0.001 for [Formula: see text] and [Formula: see text], respectively). When eP TM was considered, this association became positive (r: +0.58, p < 0.001 and r:+0.60, p < 0.001, for [Formula: see text] and [Formula: see text], respectively). When the i K LIN was considered as the comparative factor, correlations with the MIP and eP TM were weak and insignificant. Men had higher values of i K than women. SIGNIFICANCE Simulated obstructive apnea elicits large rotational i K swings, which are related to the intensity of the inspiratory effort and, as such, to the intensity of the left ventricular afterload. Computation of cardiac kinetic energy through BCG and SCG may shed further light on the impact of obstructive respiratory events on the cardiovascular system.
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Affiliation(s)
- Sofia Morra
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Belgium
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Morra S, Hossein A, Gorlier D, Rabineau J, Chaumont M, Migeotte PF, van de Borne P. Modification of the mechanical cardiac performance during end-expiratory voluntary apnea recorded with ballistocardiography and seismocardiography. Physiol Meas 2019; 40:105005. [PMID: 31579047 DOI: 10.1088/1361-6579/ab4a6a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To assess if micro-accelerometers and gyroscopes may provide useful information for the detection of breathing disturbances in further studies. APPROACH Forty-three healthy volunteers performed a 10 s end-expiratory breath-hold, while ballistocardiograph (BCG) and seismocardiograph (SCG) determined changes in kinetic energy and its integral over time (iK, J · s). BCG measures overall body accelerations in response to blood mass ejection into the main vasculature at each cardiac cycle, while SCG records local chest wall vibrations generated beat-by-beat by myocardial activity. This minimally intrusive technology assesses linear accelerations and angular velocities in 12 degrees of freedom to calculate iK during the whole cardiac cycle. iK produced during systole and diastole were also computed. MAIN RESULTS The iK during normal breathing was 87.1 [63.3; 132.8] µJ · s for the SCG and 4.5 [3.3; 6.2] µJ · s for the BCG. Both increased to 107.1 [69.0; 162.0] µJ · s and 6.1 [4.4; 9.0] µJ · s, respectively, during breath-holding (p = 0.003 and p < 0.0001, respectively). The iK of the SCG further increased during spontaneous respiration following apnea (from 107.1 [69.0; 162.0] µJ · s to 160.0 [96.3; 207.3] µJ · s, p < 0.0001). The ratio between the iK of diastole and systole increased from 0.35 [0.24; 0.45] during apnea to 0.49 [0.31; 0.80] (p < 0.0001) during the restoration of respiration. SIGNIFICANCE A brief voluntary apnea generates large and distinct increases in SCG and BCG waveforms. iK monitoring during sleep may prove useful for the detection of respiratory disturbances. ClinicalTrials.gov number: NCT03760159.
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Affiliation(s)
- Sofia Morra
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium.,Author to whom any correspondence should be addressed
| | - Amin Hossein
- LPHYS, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Damien Gorlier
- LPHYS, Université Libre de Bruxelles, Bruxelles, Belgium
| | | | - Martin Chaumont
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium
| | | | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium.,Both authors contributed equally
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Hossein A, Mirica DC, Rabineau J, Rio JID, Morra S, Gorlier D, Nonclercq A, van de Borne P, Migeotte PF. Accurate Detection of Dobutamine-induced Haemodynamic Changes by Kino-Cardiography: A Randomised Double-Blind Placebo-Controlled Validation Study. Sci Rep 2019; 9:10479. [PMID: 31324831 PMCID: PMC6642180 DOI: 10.1038/s41598-019-46823-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 07/01/2019] [Indexed: 01/26/2023] Open
Abstract
Non-invasive remote detection of cardiac and blood displacements is an important topic in cardiac telemedicine. Here we propose kino-cardiography (KCG), a non-invasive technique based on measurement of body vibrations produced by myocardial contraction and blood flow through the cardiac chambers and major vessels. KCG is based on ballistocardiography and measures 12 degrees-of-freedom (DOF) of body motion. We tested the hypothesis that KCG reliably assesses dobutamine-induced haemodynamic changes in healthy subjects. Using a randomized double-blinded placebo-controlled crossover study design, dobutamine and placebo were infused to 34 volunteers (25 ± 2 years, BMI 22 ± 2 kg/m², 18 females). Baseline recordings were followed by 3 sessions of increasing doses of dobutamine (5, 10, 20 μg/kg.min) or saline solution. During each session, stroke volume (SV) and cardiac output (CO) were determined by echocardiography and followed by a 90 s KCG recording. Measured linear accelerations and angular velocities were used to compute total Kinetic energy (iK) and power (Pmax). KCG sorted dobutamine infusion vs. placebo with 96.9% accuracy. Increases in SV and CO were correlated to iK (r = +0.71 and r = +0.8, respectively, p < 0.0001). Kino-cardiography, with 12-DOF, allows detecting dobutamine-induced haemodynamic changes with a high accuracy and present a major improvement over single axis ballistocardiography or seismocardiography.
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Affiliation(s)
- Amin Hossein
- LPHYS, Université Libre de Bruxelles, Bruxelles, Belgium.
- BEAMS, Université Libre de Bruxelles, Bruxelles, Belgium.
| | - Daniela Corina Mirica
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium
| | | | - José Ignacio Del Rio
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Sofia Morra
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Damien Gorlier
- LPHYS, Université Libre de Bruxelles, Bruxelles, Belgium
| | | | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium
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