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Chan J, Thum KY, Comella A, Kalman E, Carberry J, Gregory S, Cameron J, Brown A. Development and validation of non-invasive endothelial shear stress (ESS) estimations of coronary artery haemodynamics using computational modelling. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1197] [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: 11/13/2022] Open
Abstract
Abstract
Background
Vascular remodelling is influenced by various biomechanical forces such as endothelial shear stress (ESS) and is associated with development and progression of coronary artery disease (CAD). ESS is the parallel frictional force exerted by blood flow on the endothelial luminal surface of the arterial wall. While ESS may not be the only cause of atherosclerosis, it is postulated that low ESS creates a pro-atherogenic environment and high ESS is athero-protective. Computational fluid dynamics (CFD) is an engineering method used to analyse fluid flow and has been increasingly applied to simulate ESS in cardiovascular research. However, current CFD-derived ESS estimates have never been validated and can display significant variability between research groups.
Purpose
This study aims to provide a comparative analysis of coronary flow using in-silico modelling of coronary flow and particle image velocimetry (PIV).
Methods
A proximal left anterior descending (pLAD) coronary phantom model was constructed from a patient who had received same day cardiac computed tomography angiography (CTCA) and invasive coronary haemodynamic (Combowire XT) assessment. Patient-specific coronary flow data was applied to CFD boundary conditions and a mock circulatory loop. CFD was validated using PIV under steady flow in a 4-times-scaled model. Same plane velocity field and flow patterns (at mid-luminal of pLAD) from both in-silico and in-vivo data were compared and analysed.
Results
Mean velocity contours and magnitude were analysed from CFD and PIV. Patient specific average peak velocity obtained from invasive assessment was 0.21m/s. Patient-specific velocity average from CFD was 0.22m/s. The approximated magnitude difference is 4.7%. Both same-axial average cross-sectional velocity estimated by CFD-pLAD and PIV-pLAD are 0.087m/s. Velocity contours and flow patterns simulated in the CFD were also comparable with the PIV results.
Conclusion
Simulation data from CFD correlate well with experimental PIV results. This early data allows for a non-invasive approach to determine patient-specific coronary haemodynamics (such as velocity profiling and ESS) and form the basis of personalising cardiovascular risk. Insights from this work may aid future development of a novel tool that incorporates CFD-derived ESS estimates with patient-specific risk factors to better predict rapid CAD progression.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): Cardiac Society of Australia and New Zealand Monash Institute of Medical Engineering
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Affiliation(s)
- J Chan
- Monash Heart , Melbourne , Australia
| | - K Y Thum
- Monash University , Melbourne , Australia
| | - A Comella
- The Alfred Hospital , Melbourne , Australia
| | - E Kalman
- Monash Heart , Melbourne , Australia
| | - J Carberry
- Monash University , Melbourne , Australia
| | - S Gregory
- Monash University , Melbourne , Australia
| | - J Cameron
- Monash Heart , Melbourne , Australia
| | - A Brown
- Monash Heart , Melbourne , Australia
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Chan J, Thum K, Ihdayhid A, Comella A, Cameron J, Khamooshi M, Thakur U, Nicholls S, Carberry J, Gregory S, Cameron J, Brown A, Kalman E. Validation of Non-Invasive Endothelial Shear Stress (ESS) Estimations of Coronary Artery Haemodynamics via In-Silico and In-Vivo Modelling. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.303] [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: 10/16/2022]
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Tong B, Rollo C, Carter S, Carberry J, Martins R, Osman A, Eckert D. An investigation into the differences in the phenotypic causes of obstructive sleep apnoea in obese versus non-obese people. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.1084] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Carter S, Carberry J, Grunstein R, Eckert D. High dose zopiclone does not change OSA severity, the respiratory arousal threshold, genioglossus muscle responsiveness or next-day sleepiness and alertness in selected people with OSA. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.154] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ford TJ, Layland J, Stanley B, Carberry J, May VTY, Eteiba H, Lindsay MM, Petrie MC, Watkins S, Shaukat A, Oldroyd KG, Curzen N, McConnachie A, McEntegart M, Berry C. P6432Overlooked prognostic markers in NSTEMI: insights from the BHF FAMOUS-NSTEMI trial. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T J Ford
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - J Layland
- St Vincent's Hospital, Melbourne, Australia
| | - B Stanley
- University of Glasgow, Glasgow, United Kingdom
| | - J Carberry
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - V T Y May
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - H Eteiba
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - M M Lindsay
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - M C Petrie
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - S Watkins
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - A Shaukat
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - K G Oldroyd
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - N Curzen
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | | | - M McEntegart
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
| | - C Berry
- Golden Jubilee National Hospital, Interventional Cardiology, Glasgow, United Kingdom
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Tomazini Martins R, Carberry J, Wang D, Rowsell L, Grunstein R, Joel Eckert D. Effects of morphine on the phenotypic causes of obstructive sleep apnea. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.966] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tong B, Amatoury J, Carberry J, Eckert D. The effects of posture and mandibular advancement on nasal resistance and obstructive sleep apnea treatment outcome with a novel oral appliance therapy device. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.249] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi S, Ahmed N, Mordi I, McEntegart M, Petrie MC, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Ford I, Radjenovic A, Oldroyd KG, Berry C. 12 The influence of microvascular obstruction on the relationship between remote zone extracellular volume and subsequent left ventricular volumes in survivors of ST-elevation myocardial infarction. Heart 2015. [DOI: 10.1136/heartjnl-2015-308734.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi S, Ahmed N, Mordi I, McEntegart M, Petrie MC, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Ford I, Radjenovic A, Oldroyd KG, Berry C. 13 Natural history and clinical significance of infarct zone extracellular volume and remodelling in survivors of acute STEMI. Heart 2015. [DOI: 10.1136/heartjnl-2015-308734.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi S, Mangion K, Corcoran D, Radjenovic A, Berry C. 14 Age and sex associations with myocardial extracellular volume in healthy mid-life adults. Heart 2015. [DOI: 10.1136/heartjnl-2015-308734.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi SM, Ahmed N, Mordi I, McEntegart M, Petrie M, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Radjenovic A, Ford I, Oldroyd KG, Berry C. 4 Extracellular volume in the infarct zone is associated with clinical and mri measures of infarct severity in survivors of acute stemi: Abstract 4 Table 1. Heart 2015. [DOI: 10.1136/heartjnl-2015-307845.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi SM, Ahmed N, Mordi I, McEntegart M, Petrie M, Eteiba H, Hood S, Watkins S, Lindsay M, Davie A, Mahrous A, Radjenovic A, Ford I, Oldroyd KG, Berry C. 5 Relationships between infarct zone extracellular volume and clinical measures of ischaemia and reperfusion in acute STEMI survivors: Abstract 5 Table 1. Heart 2015. [DOI: 10.1136/heartjnl-2015-307845.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Carberry J, Carrick D, Haig C, Rauhalammi SM, Mangion K, Corcoran D, Radjenovic A, Berry C. 6 Segmental variation in myocardial extracellular volume in healthy mid-life adults: Abstract 6 Table 1. Heart 2015. [DOI: 10.1136/heartjnl-2015-307845.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
NEW FINDINGS What is the central question of this study? Co-ordinated activity of the thoracic pump and pharyngeal dilator muscles is critical for maintaining airway calibre and respiratory homeostasis. Whilst postnatal maturation of the diaphragm has been well characterized, surprisingly little is known about the developmental programme in the airway dilator muscles. What is the main finding and its importance? Developmental increases in force-generating capacity and fatigue in the sternohyoid and diaphragm muscles are attributed to a maturational shift in muscle myosin heavy chain phenotype. This maturation is accelerated in the sternohyoid muscle relative to the diaphragm and may have implications for the control of airway calibre in vivo. The striated muscles of breathing, including the thoracic pump and pharyngeal dilator muscles, play a critical role in maintaining respiratory homeostasis. Whilst postnatal maturation of the diaphragm has been well characterized, surprisingly little is known about the developmental programme in airway dilator muscles given that co-ordinated activity of both sets of muscles is needed for the maintenance of airway calibre and effective pulmonary ventilation. The form and function of sternohyoid and diaphragm muscles from Wistar rat pups [postnatal day (PD) 10, 20 and 30] was determined. Isometric contractile and endurance properties were examined in tissue baths containing Krebs solution at 35°C. Myosin heavy chain (MHC) isoform composition was determined using immunofluorescence. Muscle oxidative and glycolytic capacity was assessed by measuring the activities of succinate dehydrogenase and glycerol-3-phosphate dehydrogenase using semi-quantitative histochemistry. Sternohyoid and diaphragm peak isometric force and fatigue increased significantly with postnatal maturation. Developmental myosin disappeared by PD20, whereas MHC2B areal density increased significantly from PD10 to PD30, emerging earlier and to a much greater extent in the sternohyoid muscle. The numerical density of fibres expressing MHC2X and MHC2B increased significantly during development in the sternohyoid. Diaphragm succinate dehydrogenase activity and sternohyoid glycerol-3-phosphate dehydrogenase activity increased significantly with age. Developmental increases in force-generating capacity and fatigue in the sternohyoid and diaphragm muscles are attributed to a postnatal shift in muscle MHC phenotype. The accelerated maturation of the sternohyoid muscle relative to the diaphragm may have implications for the control of airway calibre in vivo.
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Affiliation(s)
- R A O'Connell
- School of Medicine and Medical Science, University College Dublin, Dublin, Ireland.
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McMorrow C, Fredsted A, Carberry J, O'Connell RA, Bradford A, Jones JFX, O'Halloran KD. Chronic hypoxia increases rat diaphragm muscle endurance and sodium-potassium ATPase pump content. Eur Respir J 2010; 37:1474-81. [PMID: 21148231 DOI: 10.1183/09031936.00079810] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The effects of chronic hypoxia (CH) on respiratory muscle are poorly understood. The aim of the present study was to examine the effects of CH on respiratory muscle structure and function, and to determine whether nitric oxide is implicated in respiratory muscle adaptation to CH. Male Wistar rats were exposed to CH for 1-6 weeks. Sternohyoid and diaphragm muscle contractile properties, muscle fibre type and size, the density of fibres expressing sarco/endoplasmic reticulum calcium-ATPase (SERCA) 2 and sodium-potassium ATPase (Na+,K+-ATPase) pump content were determined. Muscle succinate dehydrogenase (SDH) and reduced nicotinamide adenine dinucleotide phosphate (NADPH) dehydrogenase activities were also assessed. Acute and chronic blockade of nitric oxide synthase (NOS) was employed to determine whether or not NO is critically involved in functional remodelling in CH muscles. CH improved diaphragm, but not sternohyoid, fatigue tolerance in a time-dependent fashion. This adaptation was not attributable to increased SDH or NADPH dehydrogenase activities. The areal density of muscle fibres and relative area of fibres expressing SERCA2 were unchanged. Na+,K+-ATPase pump content was significantly increased in CH diaphragm. Chronic NOS inhibition decreased diaphragm Na+,K+-ATPase pump content and prevented CH-induced increase in muscle endurance. This study provides novel insight into the mechanisms involved in CH-induced muscle plasticity. The results may be of relevance to respiratory disorders characterised by CH, such as chronic obstructive pulmonary disease.
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Affiliation(s)
- C McMorrow
- University College Dublin School of Medicine and Medical Science, C228 Health Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland
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Carberry J. Public sector career structure update. Qld Nurse 1991; 10:10. [PMID: 1780445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Peretti PO, Carberry J. Sex-role identification, conflict, and psychopathology in adult males. Acta Psychiatr Belg 1974; 74:357-64. [PMID: 4458390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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