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Pasley T, Brink J, Ruygrok P. When Lack of Resources Necessitates Implantation of Old Big Hearts Into Little Children - 4:1 Donor/Recipient Weight Mismatch. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.610] [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: 04/05/2023] Open
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Wang V, Freytag B, Zhao D, Gilbert K, Quill G, Hasaballa A, Babarenda Gamage T, Doughty R, Legget M, Ruygrok P, Young A, Nash M. Derivation of in vivo pressure-volume loops for post-heart transplant patients using real-time 3D echocardiography and left ventricular catheterisation. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.077] [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: 11/12/2022] Open
Abstract
Abstract
Background
Image-based methods that combine catheterisation with non-concurrent cardiac magnetic resonance (CMR) imaging data and echocardiography (echo) is gaining more interest than the conductance catheter method to derive pressure-volume loops (PVLs) due to improved accuracy and accessibility of LV volume quantification [1–3]. However, accurate temporal registration between LV pressure and volume is not well developed.
Purpose
We propose a framework for temporally registering invasive LV and aortic pressures (LVP and AOP) acquired during left heart catheterisation with real time 3D echocardiography (RT3DE) to generate in vivo PVLs in a group of heart transplant (HTx) recipients.
Methods
25 orthotopic HTx recipients (mean age: 54±8 years and 7 female) indicated for routine coronary assessment were recruited for invasive hemodynamic measurement and RT3DE imaging. A fluid-filled pigtail catheter was used to measure LVP and AOP with simultaneous electrocardiogram (ECG) over several (9–15) heartbeats. Within an hour of catheterisation, single-beat transthoracic RT3DE of the LV was performed from the apical window in a left lateral decubitus position. Imaging parameters were optimized for each patient to maximize the temporal resolution (between 15–41 imaging frames per cycle). We developed a piecewise linear temporal scaling method based on cardiac events (end-diastole (ED), end of isovolumic contraction (eIVC), end-systole (ES), end of isovolumic relaxation (eIVR), and diastasis (DS)) of RT3DE and haemodynamic measurement to resample the LVP at the RT3DE imaging frames between the cardiac events to construct PVLs (Fig. 1a). Geometric LV models were manually fitted at ED and ES, followed by automatic tracking across intermediary frames to estimate LV volume over the entire cardiac cycle (Fig. 1b). The temporally aligned pressure values were further averaged to find the beat-averaged LV PVL (Fig. 1c).
Results
Based on the number of cardiac cycles selected for haemodynamic analysis, multiple in vivo PVLs were constructed for each patient. A beat-averaged PVL was also computed for each patient (Fig.1d). With the exception of one case, the beat-averaged PVLs exhibited classically representative shape with distinct isovolumic contraction and isovolumic relaxation phases. The individual diastolic PVRs for all patients are shown in Fig.1e, with beat-to-beat variation observed in most patients. For some cases, the variation manifested as an offset in LVP, whereas changes in the diastolic PVR slope were observed in other cases.
Conclusion
Temporal alignment scheme based on cardiac events allowed accurate derivation of patient-specific in vivo PVLs from catheterization and RT3DE measurements. Application to heart transplant recipients revealed beat-to-beat variation of haemodynamic state. Further analysis of the diastolic PVRs will allow quantification of chamber stiffness for HTx recipients.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Health Research Council of New Zealand Patient-specific PVLs
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Affiliation(s)
- V.Y Wang
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
| | - B Freytag
- INSERM, Creatis, CNRS UMR5220, Lyon, France
| | - D Zhao
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
| | - K Gilbert
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
| | - G Quill
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
| | - A Hasaballa
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
| | - T.P Babarenda Gamage
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
| | - R.N Doughty
- The University of Auckland, Department of Medicine, Auckland, New Zealand
| | - M.E Legget
- The University of Auckland, Department of Medicine, Auckland, New Zealand
| | - P Ruygrok
- The University of Auckland, Department of Medicine, Auckland, New Zealand
| | - A.A Young
- King's College London, Department of Biomedical Engineering, London, United Kingdom
| | - M.P Nash
- The University of Auckland, Auckland Bioengineering Institute, Auckland, New Zealand
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Ruygrok P, McGrinder H, Wheeler M, Doughty R. The Atrial Flow Regulator – A Novel Treatment Strategy for Patients With HFpEF. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.05.045] [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: 10/21/2022]
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4
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Kaur S, Jones T, Ward M, Kang N, Ruygrok P. 170 Subcellular Distribution of Epac 2 in Relation to Key Excitation-Contraction Coupling Proteins in Human Atrial Tissue. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.177] [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: 10/23/2022]
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5
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Stubbs M, Ruygrok P. Endomyocardial Biopsy at Auckland City Hospital: a 5 Year Audit – Safety and Clinical Utility. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.086] [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: 12/01/2022]
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Wang TKM, Watson T, Pemberton J, Pemberton L, Lowe B, Ellis C, Kingston N, Ruygrok P. Eosinophilic myocarditis: characteristics, diagnostics and outcomes of a rare condition. Intern Med J 2017; 46:1104-7. [PMID: 27633471 DOI: 10.1111/imj.13176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/19/2016] [Accepted: 02/24/2016] [Indexed: 11/29/2022]
Abstract
Eosinophilic myocarditis is a rare and potentially fatal condition characterised by eosinophilic inflammatory infiltration of myocardium. We report seven consecutive cases of eosinophilic myocarditis at our centre and discuss the important characteristics, investigation and management of this disease.
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Affiliation(s)
- T K M Wang
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand.
| | - T Watson
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand.,Department of Medicine, University of Auckland, Auckland, New Zealand
| | - J Pemberton
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
| | - L Pemberton
- Department of Haematology, Auckland City Hospital, Auckland, New Zealand
| | - B Lowe
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
| | - C Ellis
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
| | - N Kingston
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
| | - P Ruygrok
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand.,Department of Medicine, University of Auckland, Auckland, New Zealand
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Rea C, Ruygrok P, Sidhu K, Nand P, Stewart J, Webster M. Outcomes of Patients Discussed at the Multidisciplinary “Heart Team” Meeting According to Treatment Allocation. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.406] [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: 10/19/2022]
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8
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Wang T, Wei D, Ruygrok P, Ramanathan T. Comparison of Surgical Risk Models for Acute Type A Aortic Dissection Surgery. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.619] [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: 10/19/2022]
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9
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Wang T, Rea C, Ramanathan T, Stewart J, Webster M, Ruygrok P. Performance of EuroSCORE II for Predicting Mortality After Transcatheter Aortic Valve Implantation. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.420] [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: 11/15/2022]
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Rea C, Ruygrok P, Sidhu K, Wang T, Ramanathan I, Stewart J, Webster M. Trends in Age and EuroSCORE II of Patients with Aortic Stenosis Discussed by the Multidisciplinary “Heart Team” According to Treatment Allocation. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.450] [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: 11/24/2022]
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11
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Alawami M, Sadler M, Kasargod C, Watson T, Ghashi R, Webster M, Ruygrok P. Five-Year Outcomes of Patients With ST Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention at Auckland City Hospital. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.081] [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: 11/29/2022]
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12
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Wang T, Wang M, Ruygrok P. Meta-Analysis of the Prognostic Utility of Risk Models at Predicting Mortality After Transcatheter Aortic Valve Implantation. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.428] [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: 11/29/2022]
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13
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Wang T, Harmos S, Ramanathan T, Ruygrok P. Eight Year Cohort Study of Mitral Valve Surgery in Octogenarians and Septuagenarians. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.679] [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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14
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Wang T, Harmos S, Ramanathan T, Ruygrok P. Comparing Performance of Contemporary Risk Scores for Mitral Valve Surgery. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.676] [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: 10/21/2022]
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15
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Kent M, Ruygrok P, Sidhu K, Stewart J, Nair A, Ellis C, Webster M. Time to Reperfusion in Patients with ST Elevation Myocardial Infarction Presenting via Different and Distinct Logistic Pathways. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.154] [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] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Wang T, Wang M, Ruygrok P. Meta-Analysis of Mitraclip Versus Mitral Valve Surgery for Severe Symptomatic Mitral Regurgitation. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.427] [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: 10/21/2022]
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17
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Ruderman I, Sevastos J, Anthony C, Ruygrok P, Chan W, Javorsky G, Bergin P, Snell G, Menahem S. Outcomes of simultaneous heart-kidney and lung-kidney transplantations: the Australian and New Zealand experience. Intern Med J 2015; 45:1236-41. [DOI: 10.1111/imj.12865] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 07/19/2015] [Indexed: 11/30/2022]
Affiliation(s)
- I. Ruderman
- Department of Renal Medicine; Alfred Hospital; Melbourne Victoria Australia
| | - J. Sevastos
- Department of Cardiology; Alfred Hospital; Melbourne Victoria Australia
| | - C. Anthony
- Department of Cardiology; Alfred Hospital; Melbourne Victoria Australia
| | - P. Ruygrok
- Department of Respiratory Medicine; St Vincent's Hospital; Melbourne Victoria Australia
| | - W. Chan
- Department of Renal Medicine; St Vincent's Hospital; Sydney New South Wales Australia
| | - G. Javorsky
- Department of Renal Medicine; St Vincent's Hospital; Sydney New South Wales Australia
| | - P. Bergin
- Department of Cardiology; The Prince Charles Hospital; Brisbane Queensland Australia
| | - G. Snell
- Department of Cardiology; Auckland City Hospital; Auckland New Zealand
| | - S. Menahem
- Department of Renal Medicine; Alfred Hospital; Melbourne Victoria Australia
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18
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Bhattacharyya S, Roskruge M, Sidhu K, Nair R, Smyth D, Webster M, Ruygrok P, Ormiston J, Pasupati S. National multi-centre cost-comparison of trans-catheter aortic valve implantation (TAVI) versus surgical aortic valve replacement (SAVR) in moderate to high-risk patients with severe symptomatic aortic stenosis in New Zealand (NZ). Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.095] [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: 11/26/2022]
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19
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Fitzsimons S, Gibbs H, Wasywich C, McWilliams T, Ruygrok P. Obligatory tacrolimus formulation substitution in heart and lung transplant recipients: A national bioequivalence audit. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.148] [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: 11/30/2022]
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20
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Wang T, Choi D, Ramanathan T, Ruygrok P. Eight-year cohort study of octogenarians undergoing aortic valve replacement with or without concurrent coronary artery bypass grafting. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.115] [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: 10/23/2022]
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21
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Wang T, Choi D, Ramanathan T, Ruygrok P. Eight-year cohort study of octogenarians undergoing aortic valve replacement with or without concurrent coronary artery bypass grafting. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.697] [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: 10/23/2022]
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22
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Wang T, Choi D, Gamble G, Ramanathan T, Ruygrok P. Prognostic utility of risk scores at predicting mortality and morbidity after combined aortic valve replacement and coronary artery bypass grafting. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.114] [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: 10/23/2022]
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23
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Wang T, Ramanathan T, Choi D, Ruygrok P. Aortic valve replacement with or without coronary artery bypass grafting: stroke outcomes and predictors. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.116] [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: 12/01/2022]
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24
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Pasley T, Ruygrok P, Doughty R, Gerber I. Management of a patient with preserved ejection fraction heart failure with an interatrial shunt device. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.401] [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: 11/16/2022]
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25
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Bhattacharyya S, Roskruge M, Sidhu K, Nair R, Smyth D, Webster M, Ruygrok P, Ormiston J, Pasupati S. National multi-centre cost-comparison of trans-catheter aortic valve implantation (TAVI) versus surgical aortic valve replacement (SAVR) in moderate to high-risk patients with severe symptomatic aortic stenosis in New Zealand (NZ). Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.406] [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: 11/16/2022]
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26
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Wang T, Ramanathan T, Choi D, Ruygrok P. Aortic valve replacement with or without coronary artery bypass grafting: stroke outcomes and predictors. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.689] [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: 10/23/2022]
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27
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Wang T, Stewart R, Ramanathan T, Choi D, Gamble G, Ruygrok P, White H. Diagnosis of myocardial infarction after aortic valve replacement with high-sensitivity troponins. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.242] [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: 11/26/2022]
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28
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McAleer M, Madenholt-Titley S, Savage S, Gudex T, White J, Ruygrok P. Total ambulatory care (TAC) for day-stay coronary angiography patients (Amsterdam protocol): A positive response with suggested enhancements. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.213] [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: 11/16/2022]
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29
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Wang T, Stewart R, Choi D, Gamble G, Haydock D, Ruygrok P. Comparison of four contemporary risk scores for predicting mortality and morbidity after aortic valve replacement. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.162] [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: 10/25/2022]
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30
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Gudex T, Madenholt-Titley S, McAleer M, Savage S, White J, Ruygrok P. Introduction and evaluation of total ambulatory management of patients undergoing coronary angiography and intervention. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.191] [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: 11/28/2022]
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31
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Davis P, Ruygrok P, Howard R, Howie G. Paramedic initiated helivac to tertiary hospital for primary percutaneous coronary intervention: Initial experience and outcomes. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.145] [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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32
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Wang T, Oh T, Samaranayake C, Watson T, Stewart J, Webster M, Ruygrok P. Utility of pre-catheterisation high-sensitivity troponin T in patients without obstructive coronary artery disease. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.249] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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33
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Wang T, Watson T, Lowe B, Pemberton J, Kingston N, Ellis C, Ruygrok P. Features and outcomes of eosinophilic myocarditis: A single-centre case series. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.245] [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: 10/25/2022]
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34
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Savage S, Gudex T, McAleer M, Ruygrok P, Madenholt-Titley S, White J. Patient experience survey: Total ambulatory management and coronary angiography day stay procedures. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.140] [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: 10/25/2022]
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35
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MadenHolt-Titley S, Gudex T, McAleer M, Savage S, White J, Ruygrok P. Reduced sedation in patients undergoing coronary angiography of total ambulatory management. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.04.209] [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: 11/27/2022]
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36
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Sathananthan J, Wang T, Lee M, Ruygrok P, Webster M. Assessing surgical risk for aortic valve surgery in octogenarians: a comparison of three risk calculators. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.4436] [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: 11/15/2022] Open
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37
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Martin A, Voss J, Shannon D, Ruygrok P, Lever N. Is All Hardware Associated with Implanted Cardiac Devices Removed at the Time of Cardiac Transplantation? Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.051] [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: 11/16/2022]
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38
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Smith G, Gudex F, Willox G, Sasse A, Ruygrok P, Chataline A, Stewart R. Cognitive Impairment in Elderly Patients Evaluated for Cardiac Surgery. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.075] [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: 11/16/2022]
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39
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Alawami M, Lin A, Oh T, Webster M, Ruygrok P, Stewart J, Omiston J, Gamble G, Ellis C. Paradoxical Increases in Proportion of Patients with Preserved Ejection Fraction with Increasing Door to Reperfusion Time: The 2012 Auckland/Northland Region Experience. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.007] [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: 11/26/2022]
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40
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Wang T, Bolland M, Pelt N, Grey A, Gamble G, Ruygrok P, Reid I. Cardiovascular Significance of Abdominal Aortic Calcification on Dual-Energy X-ray Absorptiometry in Middle-aged Men. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.087] [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: 10/26/2022]
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41
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Gudex F, Willox G, Smith G, Chataline A, Ruygrok P, Stewart R, Sasse A. Clinical Frailty Assessment and Formal Frailty Testing—Clinical Decision Making in Severe Coronary and Valvular Heart Disease. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.029] [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: 10/26/2022]
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42
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Voss J, Martin A, Sinclair S, Ruygrok P, Lever N. Implantable Cardioverter Defibrillator Use Prior to Cardiac Transplantation. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.083] [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: 12/01/2022]
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43
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Wang T, Bolland M, Pelt N, Grey A, Gamble G, Ruygrok P, Reid I. Abdominal Aortic Calcification Predicts Incident Myocardial Infarction: Dual Screening Potential of Dual X-ray Absorptiometry. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.086] [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: 11/17/2022]
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44
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Willox G, Gudex F, Smith G, Ruygrok P, Chateleine A, Stewart R, Sasse A. Evaluation of Tests for Frailty in Elderly Patients Accepted for Cardiac Surgery Compared to Those Managed Conservatively. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.105] [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: 11/26/2022]
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45
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Lin A, Gamble G, McGeorge A, Webster M, Ruygrok P, Ellis C. Outcome of Patients with ST Elevation Myocardial Infarction (STEMI) and Cardiac Arrest Treated with Primary Percutaneous Coronary Intervention (PCI) and Hypothermia Therapy (HT) at Auckland City Hospital in 2012. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.049] [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: 11/16/2022]
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46
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Wang T, Sathananthan J, Chieng N, Gamble G, Haydock D, Ruygrok P. Isolated Aortic Valve Replacement in Octogenarians and Septuagenarians: Five-Year Cohort Study. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.088] [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: 11/29/2022]
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47
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Wang T, Sathananthan J, Ramanathan T, Webster M, Ruygrok P. Aortic Valve Replacement in Octogenarians Before and After the Introduction of Trans-catheter Aortic Valve Implantation. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.04.089] [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: 11/15/2022]
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48
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Wasywich C, Ruygrok A, Gibbs H, Painter L, Coverdale A, Ruygrok P. Exploring Parenthood in the New Zealand Heart Transplant Program. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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49
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Sathananthan J, Wang T, Ruygrok P, Webster M. Assessing Surgical Risk for Aortic Valve Surgery in Octogenarians: A Comparison of Three Risk Calculators. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.559] [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: 10/26/2022]
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50
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Samaranayake C, Ruygrok P, Gibbs H, Wasywich C, Coverdale A. A Cross-sectional Study on Employment After Heart Transplantation in New Zealand. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.608] [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: 11/24/2022]
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