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Gebre AK, Sim M, Dalla Via J, Smith C, Rodriguez AJ, Hodgson JM, Bondonno CP, Lim W, Byrnes E, Thompson PR, Prince RL, Lewis JR. Association between high-sensitivity cardiac troponin I and fall-related hospitalisation in women aged over 70 years. Heart 2023; 110:108-114. [PMID: 37536758 DOI: 10.1136/heartjnl-2023-322861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/10/2023] [Indexed: 08/05/2023] Open
Abstract
OBJECTIVE To examine the association between high-sensitivity cardiac troponin I (hs-cTnI), a biomarker of myocardial injury, muscle function decline and 14.5-year fall-related hospitalisation risk in women aged over 70 years. METHODS 1179 ambulatory community-dwelling women aged over 70 years with subclinical levels of hs-cTnI (ie, <15.6 ng/L), who were followed up for 14.5 years, were included. Samples for hs-cTnI were obtained in 1998. Fall-related hospitalisations were retrieved from linked health records. Muscle function measures, including handgrip strength and the Timed-Up-and-Go (TUG) test, were assessed in 1998 and 2003. RESULTS Mean±SD age was 75.2±2.7 years. Over 14.5 years of follow-up, 40.4% (476 of 1179) experienced fall-related hospitalisation. Participants were categorised into four approximate hs-cTnI quartiles: quartile 1 (<3.6 ng/L), quartile 2 (3.6-4.4 ng/L), quartile 3 (4.5-5.8 ng/L) and quartile 4 (≥5.9 ng/L). Compared with those in Q1, women in Q4 were likely to experience fall-related hospitalisation (36.0% vs 42.8%). In a multivariable-adjusted model that accounted for CVD and fall risk factors, compared with women in Q1, those in Q4 had a 46% higher risk of fall-related hospitalisation (HR 1.46, 95% CI 1.08 to 1.98). Additionally, women in Q4 had slower TUG performance compared with those in Q1 (10.3 s vs 9.5 s, p=0.032). CONCLUSION Elevated level of hs-cTnI was associated with slower TUG performance and increased fall-related hospitalisation risk. This indicates subclinical level of hs-cTnI can identify clinically relevant falls, emphasising the need to consider cardiac health during fall assessment in women aged over 70 years. TRIAL REGISTRATION NUMBER ACTRN12617000640303.
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Affiliation(s)
- Abadi Kahsu Gebre
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- School of Pharmacy,College of Health Sciences, Mekelle University, Mekelle, Tigray, Ethiopia
| | - Marc Sim
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Jack Dalla Via
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Cassandra Smith
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Alexander J Rodriguez
- School of Clinical Sciences at Monash Health, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia
| | - Jonathan M Hodgson
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Catherine P Bondonno
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Wai Lim
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
- Department of Renal Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
| | - Elizabeth Byrnes
- Department of Clinical Biochemistry, Queen Elizabeth II Medical Centre, Nedlands, Western Australia, Australia
| | - Peter R Thompson
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
- Department of Cardiology, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Richard L Prince
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Joshua R Lewis
- Nutrition and Health Innovation Research Institute,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
- Medical School, The University of Western Australia, Perth, Western Australia, Australia
- Centre for Kidney Research, School of Public Health,Sydney Medical School, The University of Sydney, Sydney, Western Australia, Australia
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Gebre AK, Sim M, Schultz C. Do high sensitivity cardiac troponin assays improve patient outcomes? BMJ 2023; 383:2741. [PMID: 38011934 DOI: 10.1136/bmj.p2741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Affiliation(s)
- Abadi K Gebre
- Nutrition and Health Innovation Research Institute, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA 6027, Australia
- School of Pharmacy, College of Health Sciences, Mekelle University, Mekelle, Tigray, Ethiopia
| | - Marc Sim
- Nutrition and Health Innovation Research Institute, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA 6027, Australia
- Medical School, The University of Western Australia, Perth, WA, Australia
| | - Carl Schultz
- Medical School, The University of Western Australia, Perth, WA, Australia
- Department of Cardiology, Royal Perth Hospital, Perth, WA, Australia
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Teh R, Prince RL, Sim M, Schousboe JT, Raymond WD, Szulc P, Lim W, Hodgson JM, Zhu K, Kiel DP, Schultz C, Thompson PL, Lewis JR. Abdominal aortic calcification, cardiac troponin I and atherosclerotic vascular disease mortality in older women. Heart 2021; 108:1274-1280. [PMID: 34952862 DOI: 10.1136/heartjnl-2021-319879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 11/22/2021] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVE Examine if two inexpensive measures of atherosclerotic vascular diseases (ASVD), abdominal aortic calcification (AAC) and high-sensitivity cardiac troponin I (hs-cTnI) provide complementary information for 10-year ASVD mortality and all-cause mortality risk in older women. METHODS 908 community-dwelling women without prevalent ASVD (≥75 years) were followed-up between 2003 and 2013. AAC and plasma hs-cTnI measures were obtained in 2003. AAC was assessed on lateral spine images using a semiquantitative method (AAC24). Linked health records were used for mortality outcomes. RESULTS Mean±SD age was 79.9±2.6 years. 276 (30.4%) women died during follow-up, including 138 (15.2%) ASVD-related deaths. AAC24 and hs-cTnI were independently associated with ASVD and all-cause mortality (p<0.001). The cohort was dichotomised into four groups: (1) low AAC24 (AAC24: 0 or 1) and <median hs-cTnI (n=163, referent), (2) moderate-extensive AAC24 (AAC24:>1) and <median hs-cTnI (n=280), (3) low AAC24 and ≥median hs-cTnI (n=148) and (4) moderate-extensive AAC24 and ≥median hs-cTnI (n=317). Compared with the referent group, a stepwise increase in relative hazard (HR (95% CI)) for ASVD mortality was seen at 2.39 (1.05 to 5.46), 3.18 (1.35 to 7.79) and 5.38 (2.44 to 11.85), respectively. A similar associations were observed for all-cause mortality, at 1.58 (0.99-2.52), 2.38 (1.46-3.89) and 3.02 (1.93-4.72), respectively (all p<0.05). CONCLUSION Higher AAC and elevated hs-cTnI were associated with higher risk of ASVD mortality and all-cause mortality, independent of each other. Stratifying by moderate to extensive AAC and elevated hs-cTnI identified women at very high risk. Further studies investigating whether combining factors may improve risk prediction are needed. TRIAL REGISTRATION NUMBER ACTRN12617000640303.
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Affiliation(s)
- Ryan Teh
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Fiona Stanley Hospital, Murdoch, Western Australia, Australia
| | - Richard L Prince
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Marc Sim
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Institute for Nutrition Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - John T Schousboe
- Park Nicollet Osteoporosis Center and Health Partners Institute, Minneapolis, Division of Health Policy and Management, University of Minnesota, Minneapolis, Minnesota, USA
| | - Warren D Raymond
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Institute for Nutrition Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Pawel Szulc
- INSERM UMR1033, University of Lyon, Hôpital Edouard Herriot, Lyon, France
| | - Wai Lim
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Department of Renal Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
| | - Jonathan M Hodgson
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Institute for Nutrition Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Kun Zhu
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Douglas P Kiel
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Carl Schultz
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Department of Cardiology, Royal Perth Hospital Campus, School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia
| | - Peter L Thompson
- Medical School, The University of Western Australia, Perth, Western Australia, Australia.,Department of Cardiovascular Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia.,Harry Perkins Institute of Medical Research, Nedlands, Western Australia, Australia
| | - Joshua R Lewis
- Medical School, The University of Western Australia, Perth, Western Australia, Australia .,Institute for Nutrition Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.,Centre for Kidney Research, Sydney Medical School, School of Public Health, The University of Sydney, Sydney, New South Wales, Australia
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Lan NSR, Bell DA, McCaul KA, Vasikaran SD, Yeap BB, Norman PE, Almeida OP, Golledge J, Hankey GJ, Flicker L. High-Sensitivity Cardiac Troponin I Improves Cardiovascular Risk Prediction in Older Men: HIMS (The Health in Men Study). J Am Heart Assoc 2020; 8:e011818. [PMID: 30819029 PMCID: PMC6474925 DOI: 10.1161/jaha.118.011818] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Background The Framingham Risk Score estimates the 10‐year risk of cardiovascular events. However, it performs poorly in older adults. We evaluated the incremental benefit of adding high‐sensitivity cardiac troponin I (hs‐cTnI) to the Framingham Risk Score. Methods and Results The HIMS (Health in Men Study) is a cohort study of community‐dwelling men aged 70 to 89 years in Western Australia. Participants were identified from the electoral roll, with a subset undergoing plasma analysis. Hs‐cTnI (Abbott Architect i2000SR) was measured in 1151 men without prior cardiovascular disease. The Western Australia Data Linkage System was used to identify incident cardiovascular events. After 10 years of follow‐up, 252 men (22%) had a cardiovascular event (CVE+) and 899 did not (CVE–). The Framingham Risk Score placed 148 (59%) CVE+ and 415 (46%) CVE– in the high‐risk category. In CVE– men, adding hs‐cTnI affected the risk categories of 244 (27.2%) men, with 64.8% appropriately reclassified to a lower and 35.2% to a higher category, which decreased the number of high‐risk men in the CVE– to 39%. In CVE+ men, adding hs‐cTnI affected the risk categories of 61 (24.2%), with 50.8% appropriately reclassified to a higher and 49.2% to a lower category and 82.5% remaining above the 15% risk treatment threshold. The net reclassification index was 0.305 (P<0.001). Adding hs‐cTnI increased the C‐statistic modestly from 0.588 (95% CI, 0.552–0.624) to 0.624 (95% CI, 0.589–0.659) and improved model fit (likelihood ratio test, P<0.001). Conclusions Adding hs‐cTnI to the Framingham Risk Score provided incremental prognostic benefit in older men, especially aiding reclassification of individuals into a lower risk category.
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Affiliation(s)
- Nick S R Lan
- 1 Medical School University of Western Australia Perth Australia
| | - Damon A Bell
- 1 Medical School University of Western Australia Perth Australia.,2 Department of Clinical Biochemistry PathWest Laboratory Medicine Royal Perth and Fiona Stanley Hospitals Perth Australia.,3 Cardiometabolic Service Department of Cardiology Royal Perth Hospital Perth Australia
| | - Kieran A McCaul
- 1 Medical School University of Western Australia Perth Australia.,4 Western Australia Centre for Health & Ageing University of Western Australia Perth Australia
| | - Samuel D Vasikaran
- 2 Department of Clinical Biochemistry PathWest Laboratory Medicine Royal Perth and Fiona Stanley Hospitals Perth Australia
| | - Bu B Yeap
- 1 Medical School University of Western Australia Perth Australia.,5 Department of Endocrinology and Diabetes Fiona Stanley Hospital Perth Western Australia Australia
| | - Paul E Norman
- 1 Medical School University of Western Australia Perth Australia
| | - Osvaldo P Almeida
- 1 Medical School University of Western Australia Perth Australia.,4 Western Australia Centre for Health & Ageing University of Western Australia Perth Australia
| | - Jonathan Golledge
- 6 Queensland Research Centre for Peripheral Vascular Disease College of Medicine and Dentistry James Cook University Townsville Australia.,7 Department of Vascular and Endovascular Surgery The Townsville Hospital Townsville Australia
| | - Graeme J Hankey
- 1 Medical School University of Western Australia Perth Australia
| | - Leon Flicker
- 1 Medical School University of Western Australia Perth Australia.,4 Western Australia Centre for Health & Ageing University of Western Australia Perth Australia.,8 Department of Geriatrics Royal Perth Hospital Perth Australia
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Chong JJH, Prince RL, Thompson PL, Thavapalachandran S, Ooi E, Devine A, Lim EEM, Byrnes E, Wong G, Lim WH, Lewis JR. Association Between Plasma Neutrophil Gelatinase-Associated Lipocalin and Cardiac Disease Hospitalizations and Deaths in Older Women. J Am Heart Assoc 2020; 8:e011028. [PMID: 30595080 PMCID: PMC6405726 DOI: 10.1161/jaha.118.011028] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Background Neutrophil gelatinase‐associated lipocalin (NGAL) or lipocalin 2 may promote atherosclerosis and plaque instability leading to increased risk of cardiac events. We investigated the relationships between plasma NGAL, cardiovascular disease biomarkers, and long‐term cardiac events. Methods and Results The study population consisted of 1131 ambulant older white women (mean age 75 years) without clinical coronary heart disease (CHD) and measures of plasma NGAL in the Perth Longitudinal Study of Ageing Women with 14.5‐year CHD and heart failure hospitalizations or death (events) captured using linked records. Over 14.5 years, 256 women had CHD events, while 118 had heart failure events. Per SD increase in log‐transformed NGAL there was a 35% to 37% increase in relative hazards for CHD and heart failure events in unadjusted analyses, which remained significant after adjustment for conventional risk factors for CHD events (hazard ratio 1.29, 95% CI 1.13–1.48, P<0.001) but not heart failure (P>0.05). Women in the highest 2 quartiles of NGAL had higher relative hazards for CHD events compared with women in the lowest quartile hazard ratio 1.61, 95% CI 1.08–2.39, P=0.019 and hazard ratio 1.97, 95% CI 1.33–3.93, P=0.001, respectively. These associations were independent of high‐sensitivity cardiac troponin I, homocysteine, and estimated renal function. NGAL correctly reclassified 1 in 4 women who sustained a CHD event up in risk and 1 in 10 women without CHD events down in risk. Conclusions NGAL was associated with increased risk of long‐term CHD events, independent of conventional risk factors and biomarkers. These findings provide mechanistic insight into the role of NGAL with cardiac events.
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Affiliation(s)
- James J H Chong
- 1 Centre for Heart Research Westmead Institute for Medical Research The University of Sydney Westmead New South Wales Australia.,2 Department of Cardiology Westmead Hospital Westmead New South Wales Australia.,3 Sydney Medical School The University of Sydney Sydney New South Wales Australia
| | - Richard L Prince
- 4 Medical School University of Western Australia Perth Australia.,6 Department of Endocrinology and Diabetes Sir Charles Gairdner Hospital Perth Australia
| | - Peter L Thompson
- 7 Department of Cardiology Sir Charles Gairdner Hospital Perth Australia
| | - Sujitha Thavapalachandran
- 1 Centre for Heart Research Westmead Institute for Medical Research The University of Sydney Westmead New South Wales Australia
| | - Esther Ooi
- 4 Medical School University of Western Australia Perth Australia.,5 School of Biomedical Sciences University of Western Australia Perth Australia
| | - Amanda Devine
- 10 School of Medical and Health Sciences Edith Cowan University Joondalup Western Australia Australia
| | - E E M Lim
- 9 PathWest Sir Charles Gairdner Hospital Perth Australia
| | | | - Germaine Wong
- 11 Centre for Kidney Research Children's Hospital at Westmead School of Public Health Sydney Medical School The University of Sydney Sydney Australia
| | - Wai H Lim
- 8 Department of Renal Medicine Sir Charles Gairdner Hospital Perth Australia
| | - Joshua R Lewis
- 4 Medical School University of Western Australia Perth Australia.,10 School of Medical and Health Sciences Edith Cowan University Joondalup Western Australia Australia.,11 Centre for Kidney Research Children's Hospital at Westmead School of Public Health Sydney Medical School The University of Sydney Sydney Australia
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Alzaghari O, Wallace DC. The Impact of Physiological Factors on 30-day Unplanned Rehospitalization in Adults with Heart Failure. J Community Health Nurs 2019; 36:31-41. [PMID: 30793963 DOI: 10.1080/07370016.2018.1555308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Heart failure (HF) patients have high rates of 30-day unplanned rehospitalization. This study assessed the impact of physiological factors on 30-day HF unplanned rehospitalization. METHODS The cross-sectional study used secondary data from electronic medical records of 270 patients. RESULTS Findings revealed several factor types were related to 30-day HF unplanned rehospitalization such as chronic kidney disease (p = 0.001), the use of CPAP machine (p = 0.028), and B-type natriuretic peptide (p = 0.050). CONCLUSION Many physiological factors were associated with 30-day HF unplanned rehospitalization. Identifying these factors will help health care providers to plan a variety of interventions that reduce 30-day HF unplanned rehospitalization.
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Affiliation(s)
- Omar Alzaghari
- a College of Health and Human Services , University of North Carolina Wilmington , Wilmington , NC , USA
| | - Debra C Wallace
- b UNC Greensboro School of Nursing , University of North Carolina Greensboro , Greensboro , NC , USA
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Lyngbakken MN, Myhre PL, Røsjø H, Omland T. Novel biomarkers of cardiovascular disease: Applications in clinical practice. Crit Rev Clin Lab Sci 2018; 56:33-60. [DOI: 10.1080/10408363.2018.1525335] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Magnus Nakrem Lyngbakken
- Division of Medicine, Akershus University Hospital, Lørenskog, Norway
- Center for Heart Failure Research, University of Oslo, Oslo, Norway
| | - Peder Langeland Myhre
- Division of Medicine, Akershus University Hospital, Lørenskog, Norway
- Center for Heart Failure Research, University of Oslo, Oslo, Norway
| | - Helge Røsjø
- Division of Medicine, Akershus University Hospital, Lørenskog, Norway
- Center for Heart Failure Research, University of Oslo, Oslo, Norway
| | - Torbjørn Omland
- Division of Medicine, Akershus University Hospital, Lørenskog, Norway
- Center for Heart Failure Research, University of Oslo, Oslo, Norway
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van Beek DEC, van der Horst ICC, de Geus AF, Mariani MA, Scheeren TWL. Albumin, a marker for post-operative myocardial damage in cardiac surgery. J Crit Care 2018; 47:55-60. [PMID: 29925051 DOI: 10.1016/j.jcrc.2018.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/23/2018] [Accepted: 06/05/2018] [Indexed: 12/21/2022]
Abstract
PURPOSE Low serum albumin (SA) is a prognostic factor for poor outcome after cardiac surgery. The aim of this study was to estimate the association between pre-operative SA, early post-operative SA and postoperative myocardial injury. METHODS This single center cohort study included adult patients undergoing cardiac surgery during 4 consecutive years. Postoperative myocardial damage was defined by calculating the area under the curve (AUC) of troponin (Tn) values during the first 72 h after surgery and its association with SA analyzed using linear regression and with multivariable linear regression to account for patient related and procedural confounders. The association between SA and the secondary outcomes (peri-operative myocardial infarction [PMI], requiring ventilation >24 h, rhythm disturbances, 30-day mortality) was studied using (multivariable) log binomial regression analysis. RESULTS In total 2757 patients were included. The mean pre-operative SA was 29 ± 13 g/l and the mean post-operative SA was 26 ± 6 g/l. Post-operative SA levels (on average 26 min after surgery) were inversely associated with postoperative myocardial damage in both univariable analysis (regression coefficient - 0.019, 95%CI -0.022/-0.015, p < 0.005) and after adjustment for patient related and surgical confounders (regression coefficient - 0.014 [95% CI -0.020/-0.008], p < 0.0005). CONCLUSIONS Post-operative albumin levels were significantly correlated with the amount of postoperative myocardial damage in patients undergoing cardiac surgery independent of typical confounders.
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Affiliation(s)
- Dianne E C van Beek
- Department of Anesthesiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
| | - Iwan C C van der Horst
- Department of Critical Care, University of Groningen, University Medical Center Groningen, Department of Critical Care, Groningen, the Netherlands
| | - A Fred de Geus
- Department of Anesthesiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Massimo A Mariani
- Department of Cardiothoracic Surgery, University of Groningen, University Medical Centre Groningen, Groningen, the Netherlands
| | - Thomas W L Scheeren
- Department of Anesthesiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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