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Wei T, Jin Q. Research trends and hotspots in exercise interventions for liver cirrhosis: A bibliometric analysis via CiteSpace. Medicine (Baltimore) 2024; 103:e38831. [PMID: 38996156 PMCID: PMC11245219 DOI: 10.1097/md.0000000000038831] [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: 12/13/2023] [Accepted: 06/14/2024] [Indexed: 07/14/2024] Open
Abstract
Cirrhosis is a chronic liver disease with severe consequences for a patient's health and survival. Exercise is an essential therapeutic strategy for both cirrhosis prevention and treatment. On the other hand, information regarding the present status of exercise-related research in cirrhosis is limited. Therefore, this study seeks to close the information gap in the scientific literature by using bibliometric techniques to analyze the trends, focal points, and cutting-edge research areas on exercise and cirrhosis. On September 22, 2023, research articles and reviews on exercise intervention for cirrhosis were obtained and downloaded from the Web of Science Core Collection (WoSCC). Subsequently, we employed CiteSpace (version 6.1.R6) to conduct bibliometric and knowledge graph analyses. 588 papers in 301 scholarly journals were written by 673 authors from 460 institutions spread over 63 countries and regions. The most productive nation among them is the United States. Not only is Zobair M. Younossi 1 of the most prolific writers, but he also receives the most co-citations. Most articles were published by the University of Michigan in the US, with the University of Alberta in Canada coming in second. Meanwhile, the WORLD JOURNAL OF GASTROENTEROLOGY has the most published articles, whereas HEPATOLOGY has the greatest number of co-citations. Apart from the theme words, the most frequently utilized keywords were "quality of life," "insulin resistance," and "mortality." Future research may concentrate on "obesity," "sarcopenia," and "Mediterranean diet," according to the analysis of keyword emergence. CiteSpace is used in this work to visually represent the topic of exercise intervention in cirrhosis, offering valuable information to researchers regarding the field's current status and possible future direction.
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Affiliation(s)
- Tao Wei
- Department of Physical Education, Yangzhou University, Yangzhou, Jiangsu, China
| | - Qiguan Jin
- Department of Physical Education, Yangzhou University, Yangzhou, Jiangsu, China
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Vetsch T, Eggmann S, Jardot F, von Gernler M, Engel D, Beilstein CM, Wuethrich PY, Eser P, Wilhelm M. Ventilatory efficiency as a prognostic factor for postoperative complications in patients undergoing elective major surgery: a systematic review. Br J Anaesth 2024; 133:178-189. [PMID: 38644158 DOI: 10.1016/j.bja.2024.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/08/2024] [Accepted: 03/16/2024] [Indexed: 04/23/2024] Open
Abstract
BACKGROUND Major surgery is associated with high complication rates. Several risk scores exist to assess individual patient risk before surgery but have limited precision. Novel prognostic factors can be included as additional building blocks in existing prediction models. A candidate prognostic factor, measured by cardiopulmonary exercise testing, is ventilatory efficiency (VE/VCO2). The aim of this systematic review was to summarise evidence regarding VE/VCO2 as a prognostic factor for postoperative complications in patients undergoing major surgery. METHODS A medical library specialist developed the search strategy. No database-provided limits, considering study types, languages, publication years, or any other formal criteria were applied to any of the sources. Two reviewers assessed eligibility of each record and rated risk of bias in included studies. RESULTS From 10,082 screened records, 65 studies were identified as eligible. We extracted adjusted associations from 32 studies and unadjusted from 33 studies. Risk of bias was a concern in the domains 'study confounding' and 'statistical analysis'. VE/VCO2 was reported as a prognostic factor for short-term complications after thoracic and abdominal surgery. VE/VCO2 was also reported as a prognostic factor for mid- to long-term mortality. Data-driven covariable selection was applied in 31 studies. Eighteen studies excluded VE/VCO2 from the final multivariable regression owing to data-driven model-building approaches. CONCLUSIONS This systematic review identifies VE/VCO2 as a predictor for short-term complications after thoracic and abdominal surgery. However, the available data do not allow conclusions about clinical decision-making. Future studies should select covariables for adjustment a priori based on external knowledge. SYSTEMATIC REVIEW PROTOCOL PROSPERO (CRD42022369944).
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Affiliation(s)
- Thomas Vetsch
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Centre for Rehabilitation & Sports Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Graduate School for Health Sciences, University of Bern, Bern, Switzerland.
| | - Sabrina Eggmann
- Department of Physiotherapy, Inselspital, Bern University Hospital, Bern, Switzerland
| | - François Jardot
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Marc von Gernler
- Medical Library, University Library of Bern, University of Bern, Bern, Switzerland
| | - Dominique Engel
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Christian M Beilstein
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Patrick Y Wuethrich
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Prisca Eser
- Centre for Rehabilitation & Sports Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Matthias Wilhelm
- Centre for Rehabilitation & Sports Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Cunha G, Apostolo A, De Martino F, Salvioni E, Matavelli I, Agostoni P. Exercise oscillatory ventilation: the past, present, and future. Eur J Prev Cardiol 2023; 30:ii22-ii27. [PMID: 37819229 DOI: 10.1093/eurjpc/zwad205] [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: 01/11/2023] [Revised: 05/22/2023] [Accepted: 06/12/2023] [Indexed: 10/13/2023]
Abstract
Exercise oscillatory ventilation (EOV) is a fascinating event that can be appreciated in the cardiopulmonary exercise test and is characterized by a cyclic fluctuation of minute ventilation, tidal volume, oxygen uptake, carbon dioxide production, and end-tidal pressure for oxygen and carbon dioxide. Its mechanisms stem from a dysregulation of the normal control feedback of ventilation involving one or more of its components, namely, chemoreflex delay, chemoreflex gain, plant delay, and plant gain. In this review, we intend to breakdown therapeutic targets according to pathophysiology and revise the prognostic value of exercise oscillatory ventilation in the setting of heart failure and other diagnoses.
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Affiliation(s)
- Gonçalo Cunha
- Cardiology department, Hospital de Santa Cruz, Centro Hospitalar Lisboa Ocidental, Av. Prof. Dr. Reinaldo dos Santos, 2790-134 Carnaxide, Portugal
| | - Anna Apostolo
- Heart failure department, Centro Cardiologico Monzino, IRCCS, Milan, Italy
| | | | | | - Irene Matavelli
- Heart failure department, Centro Cardiologico Monzino, IRCCS, Milan, Italy
| | - Piergiuseppe Agostoni
- Heart failure department, Centro Cardiologico Monzino, IRCCS, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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Alfitian J, Riedel B, Ismail H, Ho KM, Xie S, Zimmer P, Kammerer T, Wijeysundera DN, Cuthbertson BH, Schier R. Sex-related differences in functional capacity and its implications in risk stratification before major non-cardiac surgery: a post hoc analysis of the international METS study. EClinicalMedicine 2023; 64:102223. [PMID: 37811489 PMCID: PMC10556582 DOI: 10.1016/j.eclinm.2023.102223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 08/24/2023] [Accepted: 09/05/2023] [Indexed: 10/10/2023] Open
Abstract
Background Poor functional capacity has been identified as an important modifiable risk factor for postoperative complications. Cardiopulmonary exercise testing (CPET) provides objective parameters of functional capacity (e.g., oxygen consumption at peak exercise, peak VO2), with significant prognostication for postoperative complications. However, sex-specific thresholds for functional capacity to predict surgical risk are yet to be established. Therefore, we performed a post hoc analysis of the international, multicentre, prospective observational METS (Measurement of Exercise Tolerance before Surgery) study to evaluate if sex-specific thresholds of peak VO2 improve risk prediction of postoperative complications. Methods We undertook a post hoc analysis (HREC/71824/PMCC) of the METS study, which was performed between March 2013 and March 2016. We investigated whether sex-specific differences exist for CPET-derived parameters and associated thresholds for predicting postoperative complications in this large cohort of patients that had major non-cardiac surgery (n = 1266). Logistic regression models were analyzed for the association of low peak VO2 with moderate-to-severe in-hospital postoperative complications. Optimal sex-specific peak VO2 thresholds were obtained by maximizing the Youden index of receiver operating characteristic (ROC) curves. Finally, multivariable logistic regression models tested the resulting sex-specific thresholds against the established non-sex-specific peak VO2 threshold (14 mL kg-1 min-1) adjusted for clinically relevant features such as comorbidities and surgical complexity. Models were evaluated by bootstrapping optimism-corrected area under the ROC curve and the net reclassification improvement index (NRI). Findings Female patients (n = 480) had a lower mean (SD) peak VO2 than males (16.7 (4.9) mL kg-1 min-1 versus 21.2 (6.5) mL kg-1 min-1, p < 0.001) and a lower postoperative complication rate (10.4% versus 15.3%; p = 0.018) than males (n = 786). The optimal peak VO2 threshold for predicting postoperative complications was 12.4 mL kg-1 min-1 for females and 22.3 mL kg-1 min-1 for males, respectively. In the multivariable regression model, low non-sex-specific peak VO2 did not independently predict postoperative complications. In contrast, low sex-specific peak VO2 was an independent predictor of postoperative complications (OR 2.29; 95% CI: 1.60, 3.30; p < 0.001). The optimism-corrected AUC-ROC of the sex-specific model was higher compared with the non-sex-specific model (0.73 versus 0.7; DeLong's test: p = 0.021). The sex-specific model classified 39% of the patients more correctly than the baseline model (NRI = 0.39; 95% CI: 0.24, 0.55). In contrast, the non-sex-specific model only classified 9% of the patients more correctly when compared against the baseline model (NRI = 0.09; 95% CI: -0.04, 0.22). Interpretation Our data report sex-specific differences in preoperative CPET-derived functional capacity parameters. Sex-specific peak VO2 thresholds identify patients at increased risk for postoperative complications with a higher discriminatory ability than a sex-unspecific threshold. As such, sex-specific threshold values should be considered in preoperative CPET to potentially improve risk stratification and to guide surgical decision-making, including eligibility for surgery, preoperative optimization strategies (prehabilitation) or seeking non-surgical options. Funding There was no funding for the present study. The original METS study was funded by Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Ontario Ministry of Health and Long-Term Care, Ontario Ministry of Research, Innovation and Science, UK National Institute of Academic Anaesthesia, UK Clinical Research Collaboration, Australian and New Zealand College of Anaesthetists, and Monash University.
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Affiliation(s)
- Jonas Alfitian
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department for Anesthesiology and Intensive Care Medicine, Germany
| | - Bernhard Riedel
- Department of Anaesthesia, Perioperative Medicine and Pain Medicine, Peter MacCallum Cancer Centre, Australia
- The Department of Critical Care, University of Melbourne, Melbourne, Australia
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
| | - Hilmy Ismail
- Department of Anaesthesia, Perioperative Medicine and Pain Medicine, Peter MacCallum Cancer Centre, Australia
- The Department of Critical Care, University of Melbourne, Melbourne, Australia
| | - Kwok M. Ho
- University of Western Australia and Murdoch University, Australia
| | - Sophia Xie
- Peter MacCallum Cancer Centre, Centre for Biostatistics and Clinical Trials, Australia
| | - Philipp Zimmer
- Division of Performance and Health, Institute for Sport and Sport Science, TU Dortmund University, Germany
| | - Tobias Kammerer
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department for Anesthesiology and Intensive Care Medicine, Germany
| | - Duminda N. Wijeysundera
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada
- Department of Anesthesia, St. Michael’s Hospital, Toronto, ON, Canada
| | - Brian H. Cuthbertson
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada
- Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Robert Schier
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department for Anesthesiology and Intensive Care Medicine, Germany
- Department of Anesthesiology, Emergency and Intensive Care Medicine, University of Marburg, Campus Fulda, Germany
| | - the METS Study Investigators
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department for Anesthesiology and Intensive Care Medicine, Germany
- Department of Anaesthesia, Perioperative Medicine and Pain Medicine, Peter MacCallum Cancer Centre, Australia
- The Department of Critical Care, University of Melbourne, Melbourne, Australia
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
- University of Western Australia and Murdoch University, Australia
- Peter MacCallum Cancer Centre, Centre for Biostatistics and Clinical Trials, Australia
- Division of Performance and Health, Institute for Sport and Sport Science, TU Dortmund University, Germany
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada
- Department of Anesthesia, St. Michael’s Hospital, Toronto, ON, Canada
- Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Anesthesiology, Emergency and Intensive Care Medicine, University of Marburg, Campus Fulda, Germany
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Lee N, Cha S, Kim J, Lee Y, Kang E, Kim HJ, Hong SH, Rhu J, Choi GS, Joh JW. Ventilator support in the pretransplant period predisposes early graft failure after deceased donor liver transplantation. Ann Surg Treat Res 2023; 105:141-147. [PMID: 37693286 PMCID: PMC10485352 DOI: 10.4174/astr.2023.105.3.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/31/2023] [Accepted: 08/07/2023] [Indexed: 09/12/2023] Open
Abstract
Purpose Deceased donor liver transplantation (DDLT) recipients in Korea are generally sicker due to an increasing organ shortage. In the present study, the risk factors for early 30-day liver graft failure after DDLT were identified. Methods From August 2017 to February 2021, 265 adult DDLTs were performed. The characteristics of patients with and without 30-day graft failure were compared. Results Liver graft failure occurred in 11 patients (17.7%) after DDLT. Baseline and perioperative characteristics of donors and recipients were not statistically significantly different between the 2 groups. The cumulative graft and overall survival rates at 6 months were 83.9% and 88.7%, respectively. Multivariate analysis showed ventilator support in the pretransplant period was a predisposing factor for 30-day graft failure after DDLT. Conclusion Present study indicates that cautious decision is required when allocating DDLT in critically ill patients on mechanical ventilatory support.
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Affiliation(s)
- Nuri Lee
- Department of Surgery, Veterans Health Service Medical Center, Seoul, Korea
| | - Sora Cha
- Organ Transplant Center, Samsung Medical Center, Seoul, Korea
| | - Jongman Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yunmi Lee
- Organ Transplant Center, Samsung Medical Center, Seoul, Korea
| | - Enjin Kang
- Organ Transplant Center, Samsung Medical Center, Seoul, Korea
| | - Hyun Jung Kim
- Organ Transplant Center, Samsung Medical Center, Seoul, Korea
| | - Seung Hui Hong
- Organ Transplant Center, Samsung Medical Center, Seoul, Korea
| | - Jinsoo Rhu
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Gyu-Seong Choi
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jae-Won Joh
- Department of Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Farrugia MA, Le Garf S, Chierici A, Piche T, Gual P, Iannelli A, Anty R. Therapeutic Physical Exercise Programs in the Context of NASH Cirrhosis and Liver Transplantation: A Systematic Review. Metabolites 2023; 13:metabo13030330. [PMID: 36984770 PMCID: PMC10053873 DOI: 10.3390/metabo13030330] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 02/11/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
In recent years, various physical exercise interventions have been developed with a view to reducing comorbidity and morbidity rates among patients with chronic diseases. Regular physical exercise has been shown to reduce hypertension and mortality in patients with type 2 diabetes. Diabetes and obesity are often associated with the development of nonalcoholic fatty liver disease, which can lead to liver fibrosis and then (in some cases) nonalcoholic steatohepatitis cirrhosis. We searched the literature for publications on personalized physical exercise programs in cirrhotic patients before and after liver transplantation. Eleven studies in cirrhotic patients and one study in liver transplant recipients were included in the systematic review, the results of which were reported in compliance with the preferred reporting items for systematic reviews and meta-analyses guidelines. The personalized physical exercise programs lasted for 6 to 16 weeks. Our review evidenced improvements in peak oxygen consumption and six-minute walk test performance and a reduction in the hepatic venous pressure gradient. In cirrhotic patients, personalized physical exercise programs improve quality of life, are not associated with adverse effects, and (for transplant recipients) might reduce the 90-day hospital readmission rate. However, none of the literature data evidenced reductions in the mortality rates before and after transplantation. Further prospective studies are needed to evaluate the benefit of long-term physical exercise programs in cirrhotic patients before and after liver transplantation.
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Affiliation(s)
- Marwin A. Farrugia
- Digestive Center, Centre Hospitalier Universitaire, Archet 2 Hospital, Université Côte d’Azur, 06000 Nice, France
| | - Sebastien Le Garf
- CSO PACA-Est, INSERM, C3M, Université Côte d’Azur, CEDEX 3, 06000 Nice, France
| | - Andrea Chierici
- Centre Hospitalier Universitaire de Nice—Digestive Surgery and Liver Transplantation Unit, Archet 2 Hospital, Université Côte d’Azur, 06000 Nice, France
| | - Thierry Piche
- Centre Hospitalier Universitaire, INSERM, U1065, C3M, Université Côte d’Azur, 06000 Nice, France
| | - Philippe Gual
- INSERM, U1065, C3M, Université Côte d’Azur, 06000 Nice, France
| | - Antonio Iannelli
- Centre Hospitalier Universitaire de Nice—Digestive Surgery and Liver Transplantation Unit, Archet 2 Hospital, INSERM U1065, Team 8 “Hepatic complications of obesity and alcohol”, Université Côte d’Azur, 06000 Nice, France
| | - Rodolphe Anty
- Digestive Center, Centre Hospitalier Universitaire, Archet 2 Hospital, Université Côte d’Azur, 06000 Nice, France
- Correspondence:
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Sarcopenia-The Impact on Physical Capacity of Liver Transplant Patients. Life (Basel) 2021; 11:life11080740. [PMID: 34440484 PMCID: PMC8401329 DOI: 10.3390/life11080740] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/07/2021] [Accepted: 07/19/2021] [Indexed: 01/10/2023] Open
Abstract
Optimizing patients' condition before liver transplantation (LT) could potentially improve survival of LT patients. We focused on sarcopenia, as a common factor in liver transplant candidates that can impact their cardiopulmonary performance at the point of listing, morbidity, and mortality after LT. We performed a single-center cohort study on 98 consecutive patients with liver cirrhosis who were transplanted between March 2015 and December 2017. The third lumbar vertebra skeletal muscle index (L3SMI) was calculated using CT imaging to distinguish sarcopenia at listing for LT. Data regarding liver function, body mass index (BMI), cardiac biomarkers, the peak oxygen uptake (VO2) and LT outcome were collected and correlated to L3SMI. For data analysis the Dell Statistica (Version 13. Dell Inc., Rondrock, TX, USA) was used. In total, 98 cirrhotic patients were included. Fifty-five (56.1%) patients, mostly males, had sarcopenia according to L3SMI, with the lowest L3SMI in males with alcohol-related liver disease. Lower L3SMI correlated with lower BMI, lower VO2 peak, and higher NTproBNP (all p < 0.001) and revealed an essential correlation with prolonged ICU stay (r = -0.21, p < 0.05). 33 patients were unable to perform cardio-pulmonary exercise test, mostly sarcopenic (67%), with more advanced liver insufficiency (assessed with CPC and MELD scores) and longer stay at ICU after LT (all p < 0.001). Sarcopenia was common among LT recipients. It was associated with inferior result in cardio-pulmonary performance before LT and prolonged ICU stay after grafting.
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Exercise oscillatory ventilation during autonomic blockade in young athletes and healthy controls. Eur J Appl Physiol 2021; 121:2499-2507. [PMID: 34031723 DOI: 10.1007/s00421-021-04720-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/15/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Exercise oscillatory ventilation (EOV) is a form of periodic breathing that is associated with a poor prognosis in heart failure patients, but little is known about EOV in other populations. We sought to provide insights into the phenomenon of EOV after it was observed in young healthy subjects, including athletes, after the administration of dual autonomic blockade (DAB). METHODS From 29 participants who completed cardiopulmonary exercise testing (CPET) with and without DAB (0.04 mg/kg atropine and 0.2 mg/kg metoprolol), 5 subjects developed EOV (age = 29 ± 5 years; 3/5 were athletes) according to American Heart Association criteria. For each case, we identified 2 non-EOV healthy controls (age = 34.2 ± 8.3; 7/10 were athletes) that were subsequently age- and sex-matched. RESULTS No participants had EOV during exercise without DAB. The 5 participants (4 male, 1 female) who demonstrated EOV with DAB had lower mean tidal volume (1.7 ± 0.5 L/min vs. 1.8 ± 0.5 L/min; p = 0.04) compared to participants in the non-EOV group and a decrease in peak tidal volume (2.9 ± 0.6 L/min to 2.2 ± 0.7 L/min; p = 0.004) with DAB. There were few other differences in CPET measures between EOV and non-EOV participants, although the PETCO2 tended to be higher in the EOV group (p = 0.07). CONCLUSION EOV can be elucidated in young healthy subjects, including athletes, during cardiopulmonary exercise testing, suggesting that it may not be an ominous sign in all populations.
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Welch R, Kolbe J, Lardenoye M, Ellyett K. Novel application of Poincaré analysis to detect and quantify exercise oscillatory ventilation. Physiol Meas 2021; 42. [PMID: 33740782 DOI: 10.1088/1361-6579/abf05d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 03/19/2021] [Indexed: 11/12/2022]
Abstract
Objective.Exercise oscillatory ventilation (EOV) is frequently observed in individuals with cardiac disease. Assessment of EOV relies on pattern recognition and this subjectivity and lack of quantification limits the widespread clinical use of EOV as a prognostic marker. Poincaré analysis quantifies the short (SD1) and long-term (SD2) variability of a signal and may provide an alternative means to identify and quantify unstable exercise breathing patterns. This study aimed to determine if Poincaré analysis can distinguish between the breathing patterns of healthy control subjects and individuals being assessed for heart transplantation with and without EOV.Approach.Thirty-nine subjects performed a cardiopulmonary exercise test as part of heart transplant assessment and were subjectively classified into two groups according to the presence of EOV: non-EOV (n = 19) and EOV (n = 20). The control group (n = 24) consisted of healthy adults. Poincaré analysis (SD1 and SD2) was performed for minute ventilation (V̇E) and tidal volume (VT) normalized to forced vital capacity (V̇EnandV̇Tn), and breathing frequency (BF) for breath-by-breath data over the 10-15 ml · min-1 · kg-1V̇O2range.Main results.Poincaré analysis showed similar exercise ventilatory responses between the non-EOV and control group. BF was found to discriminate between subjects with stable and unstable ventilation. BF SD1 was significantly higher in the EOV group compared to the non-EOV (7.9 versus 4.6,p < 0.01) and control (7.9 versus 4.2,p < 0.01) groups. The EOV group had significantly greater BF SD2 compared to the non-EOV (5.7 versus 3.5,p < 0.01) and control (5.7 versus 3.5,p < 0.01) groups.Significance.We demonstrated that this novel application of Poincaré analysis can objectively distinguish and quantify unstable from stable breathing patterns during exercise. In subjects being assessed for heart transplantation the presence of EOV is associated with greater BF variability. Poincaré analysis provides an objective measure to identify and quantify EOV.Summary at a glance.As EOV may indicate abnormal ventilatory control, there is a need for an objective measure to identify and quantify unstable from stable ventilation during exercise. We developed a method of quantifying BF variation by the application of Poincaré analysis and demonstrated higher than normal variability of BF in subjects being assessed for heart transplantation who demonstrated EOV.
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Affiliation(s)
- Ryan Welch
- Respiratory Services, Auckland District Health Board, Auckland, New Zealand.,The University of Auckland, Auckland, New Zealand
| | - John Kolbe
- Respiratory Services, Auckland District Health Board, Auckland, New Zealand.,The University of Auckland, Auckland, New Zealand
| | - Mandy Lardenoye
- Respiratory Services, Auckland District Health Board, Auckland, New Zealand
| | - Kevin Ellyett
- Respiratory Services, Auckland District Health Board, Auckland, New Zealand.,The University of Auckland, Auckland, New Zealand
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Delsart P, Delahaye C, Devos P, Domanski O, Azzaoui R, Sobocinski J, Juthier F, Vincentelli A, Rousse N, Mugnier A, Soquet J, Loobuyck V, Koussa M, Modine T, Jegou B, Bical A, Hysi I, Fabre O, Pontana F, Matran R, Mounier-Vehier C, Montaigne D. Prognostic value of aerobic capacity and exercise oxygen pulse in postaortic dissection patients. Clin Cardiol 2020; 44:252-260. [PMID: 33381882 PMCID: PMC7852169 DOI: 10.1002/clc.23537] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/15/2020] [Accepted: 12/17/2020] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Although recommendations encourage daily moderate activities in post aortic dissection, very little data exists regarding cardiopulmonary exercise testing (CPET) to personalize those patient's physical rehabilitation and assess their cardiovascular prognosis. DESIGN We aimed at testing the prognostic insight of CPET regarding aortic and cardiovascular events by exploring a prospective cohort of patients followed-up after acute aortic dissection. METHODS Patients referred to our department after an acute (type A or B) aortic dissection were prospectively included in a cohort between September 2012 and October 2017. CPET was performed once optimal blood pressure control was obtained. Clinical follow-up was done after CPET for new aortic event and major cardio-vascular events (MCE) not directly related to the aorta. RESULTS Among the 165 patients who underwent CPET, no adverse event was observed during exercise testing. Peak oxygen pulse was 1.46(1.22-1.84) mlO2/beat, that is, 97 (83-113) % of its predicted value, suggesting cardiac exercise limitation in a population under beta blockers (92% of the population). During a follow-up of 39(20-51) months from CPET, 42 aortic event recurrences and 22 MCE not related to aorta occurred. Low peak oxygen pulse (<85% of predicted value) was independently predictive of aortic event recurrence, while low peak oxygen uptake (<70% of predicted value) was an independent predictor of MCE occurrence. CONCLUSION CPET is safe in postaortic dissection patients should be used to not only to personalize exercise rehabilitation, but also to identify those patients with the highest risk for new aortic events and MCE not directly related to aorta.
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Affiliation(s)
| | | | - Patrick Devos
- University of Lille, CHU Lille, EA 2694 - Santé publique: épidémiologie et qualité des soins, Lille, France
| | | | | | - Jonathan Sobocinski
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1008, Lille, France
| | - Francis Juthier
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1011, Lille, France
| | - Andre Vincentelli
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1011, Lille, France
| | - Natacha Rousse
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1011, Lille, France
| | | | - Jerome Soquet
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1011, Lille, France
| | - Valentin Loobuyck
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1011, Lille, France
| | | | | | - Bruno Jegou
- CHU Lille, Institut Coeur-Poumon, Lille, France
| | | | - Ilir Hysi
- Department of Cardiac Surgery of Artois, Centre Hospitalier de Lens et Hôpital Privé de Bois Bernard, Ramsay Générale de Santé, Lens, France
| | - Olivier Fabre
- Department of Cardiac Surgery of Artois, Centre Hospitalier de Lens et Hôpital Privé de Bois Bernard, Ramsay Générale de Santé, Lens, France
| | - François Pontana
- CHU Lille, Institut Coeur-Poumon, Lille, France.,University of Lille, CHU Lille, Inserm U1011, Lille, France
| | | | | | - David Montaigne
- CHU Lille, Department of Clinical Physiology & echocardiography, Univ. Lille, Inserm U1011-EGID, Lille, France
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11
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Otto JM, Levett DZH, Grocott MPW. Cardiopulmonary Exercise Testing for Preoperative Evaluation: What Does the Future Hold? CURRENT ANESTHESIOLOGY REPORTS 2020. [DOI: 10.1007/s40140-020-00373-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
Purpose of Review
Cardiopulmonary exercise testing (CPET) informs the preoperative evaluation process by providing individualised risk profiles; guiding shared decision-making, comorbidity optimisation and preoperative exercise training; and informing perioperative patient management. This review summarises evidence on the role of CPET in preoperative evaluation and explores the role of novel and emerging CPET variables and alternative testing protocols that may improve the precision of preoperative evaluation in the future.
Recent Findings
CPET provides a wealth of physiological data, and to date, much of this is underutilised clinically. For example, impaired chronotropic responses during and after CPET are simple to measure and in recent studies are predictive of both cardiac and noncardiac morbidity following surgery but are rarely reported. Exercise interventions are increasingly being used preoperatively, and endurance time derived from a high intensity constant work rate test should be considered as the most sensitive method of evaluating the response to training. Further research is required to identify the clinically meaningful difference in endurance time. Measuring efficiency may have utility, but this requires exploration in prospective studies.
Summary
Further work is needed to define contemporaneous risk thresholds, to explore the role of other CPET variables in risk prediction, to better characterise CPET’s role in combination with other tools in multifactorial risk stratification and increasingly to evaluate CPET’s utility for preoperative exercise prescription in prehabilitation.
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12
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Abstract
Sarcopenia, frailty, and malnutrition are prevalent complications in patients with end-stage liver disease (ESLD) and are associated with increased risk of morbidity and mortality. It is valuable to measure nutritional status, sarcopenia, and frailty over time in order to create interventions tailored to individuals with ESLD. Evaluating sarcopenia and frailty in patients with ESLD is challenging. Further work is needed to perfect these assessments so that clinicians can incorporate these assessments into their decision-making and management plans for cirrhotic patients.
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Affiliation(s)
- Elizabeth S Aby
- Department of Medicine, University of California at Los Angeles, UCLA Medical Center, 757 Westwood Plaza, Suite 7501, Los Angeles, CA 90095, USA. https://twitter.com/lizabmn47
| | - Sammy Saab
- Department of Medicine, University of California at Los Angeles, UCLA Medical Center, 757 Westwood Plaza, Suite 7501, Los Angeles, CA 90095, USA; Department of Surgery, University of California at Los Angeles, Los Angeles, CA, USA.
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13
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Poor Cardiorespiratory Fitness Is a Risk Factor for Sepsis in Patients Awaiting Liver Transplantation. Transplantation 2019; 103:529-535. [DOI: 10.1097/tp.0000000000002360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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14
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Hulo S, Edme JL, Inamo J, Van Bulck R, Dharancy S, Neviere R. Elevated alveolar nitric oxide is linked to poor aerobic capacity and chronotropic incompetence in liver transplant candidates. J Breath Res 2018; 12:046008. [PMID: 30080156 DOI: 10.1088/1752-7163/aad847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND & AIMS Increased nitric oxide is involved in abnormal hemodynamic parameters and respiratory function of cirrhotic patients. We aimed to quantify partitioning exhaled nitric oxide measurements in exhaled air in liver transplantation (LT) candidates and evaluate their relationships with chronotropic incompetence and aerobic capacity. METHODS We compared exhaled nitric oxide (NO) measurements, heart rate response and peak oxygen uptake during incremental exercise in liver transplantation candidates to those of controls. RESULTS As opposed to healthy control subjects, LT candidates displayed elevated alveolar NO, blunted chronotropic response and reduced V'O2 at maximal exercise. In LT candidates, median peak V'O2 was 18.7 ml kg-1 min-1 (interquartile range (IQR) 16.2; 21.8), corresponding to 65% (IQR 57; 72) of the predicted value. Compared with controls, LT candidates had increased levels of alveolar NO (median (IQR) 2.0 (1.2; 2.2) versus 3.1 (2.3; 4.5), p < 0.001). In controls, no relations were found between alveolar NO and V'O2 peak or heart rate reserve whereas in cirrhotic patients, negative correlations and negative slopes were found between alveolar NO and V'O2 peak and heart rate reserve decrease. CONCLUSIONS Increasing alveolar NO could be a specific pathophysiological condition limiting aerobic capacity in LT candidates.
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Affiliation(s)
- S Hulo
- Service d'Explorations Fonctionnelles Respiratoires, Hôpital Calmette, CHU Lille, F-59000, France. Univ. Lille IMPECS IMPact de l'Environnement Chimique sur la Santé humaine, F-59000 Lille, France
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15
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Burra P, Giannini EG, Caraceni P, Ginanni Corradini S, Rendina M, Volpes R, Toniutto P. Specific issues concerning the management of patients on the waiting list and after liver transplantation. Liver Int 2018; 38:1338-1362. [PMID: 29637743 DOI: 10.1111/liv.13755] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 03/27/2018] [Indexed: 02/06/2023]
Abstract
The present document is a second contribution collecting the recommendations of an expert panel of transplant hepatologists appointed by the Italian Association for the Study of the Liver (AISF) concerning the management of certain aspects of liver transplantation, including: the issue of prompt referral; the management of difficult candidates; malnutrition; living related liver transplants; hepatocellular carcinoma; and the role of direct acting antiviral agents before and after transplantation. The statements on each topic were approved by participants at the AISF Transplant Hepatology Expert Meeting organized by the Permanent Liver Transplant Commission in Mondello on 12-13 May 2017. They are graded according to the GRADE grading system.
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Affiliation(s)
- Patrizia Burra
- Multivisceral Transplant Unit, University Hospital, Padova, Italy
| | - Edoardo G Giannini
- Gastroenterology Unit, Department of Internal Medicine, University of Genoa, Ospedale Policlinico San Martino, Genoa, Italy
| | | | | | | | - Riccardo Volpes
- Hepatology and Gastroenterology Unit, ISMETT-IRCCS, Palermo, Italy
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16
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Tapper EB, Martinez-Macias R, Duarte-Rojo A. Is Exercise Beneficial and Safe in Patients with Cirrhosis and Portal Hypertension? ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s11901-018-0404-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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17
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Abstract
The surgical patient population is increasingly elderly and comorbid and poses challenges to perioperative physicians. Accurate preoperative risk stratification is important to direct perioperative care. Reduced aerobic fitness is associated with increased postoperative morbidity and mortality. Cardiopulmonary exercise testing is an integrated and dynamic test that gives an objective measure of aerobic fitness or functional capacity and identifies the cause of exercise intolerance. Cardiopulmonary exercise testing provides an individualized estimate of patient risk that can be used to predict postoperative morbidity and mortality. This technology can therefore be used to inform collaborative decision-making and patient consent, to triage the patient to an appropriate perioperative care environment, to diagnose unexpected comorbidity, to optimize medical comorbidities preoperatively, and to direct individualized preoperative exercise programs. Functional capacity, evaluated as the anaerobic threshold and peak oxygen uptake ([Formula: see text]o2peak) predicts postoperative morbidity and mortality in the majority of surgical cohort studies. The ventilatory equivalents for carbon dioxide (an index of gas exchange efficiency), is predictive of surgical outcome in some cohorts. Prospective cohort studies are needed to improve the precision of risk estimates for different patient groups and to clarify the best combination of variables to predict outcome. Early data suggest that preoperative exercise training improves fitness, reduces the debilitating effects of neoadjuvant chemotherapy, and may improve clinical outcomes. Further research is required to identify the most effective type of training and the minimum duration required for a positive effect.
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18
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Dehghani SM, Moshref M, Amoozgar H, Hoseini SAM, Nikeghbalian S. Exercise Performance in Pediatric Liver Transplant Recipients and Its Related Cardiac Function. Pediatr Cardiol 2018; 39:548-554. [PMID: 29243013 DOI: 10.1007/s00246-017-1786-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 11/30/2017] [Indexed: 02/08/2023]
Abstract
The aim of this study was to evaluate an exercise test in pediatric liver transplant recipients and its relation to their cardiac function. This cross-sectional study was conducted on 58 children who had successfully undergone orthotopic liver transplantation at least 6 months prior to the study, with the same age and gender-matched control group. M-mode, Doppler, tissue Doppler echocardiography and an exercise test were performed for all the participants. The VO2 values and METS in patients were less than the control (P = 0.001). Left ventricular posterior wall thickness in systole, left ventricular posterior wall thickness in diastole, interventricular septum diameter in diastole, AT, pulmonary acceleration time, ST and EaT, AaM, and SS had a significant difference between patients and the control group (P value < 0.05). Maximal oxygen consumption (Max VO2) and metabolic equivalent task (METs) values had a significant correlation with tricuspid valve S parameter (P = 0.018, r = 0.310). Max VO2 and METs values did not have a significant correlation with the diastolic dysfunction index, such as E/A and E/Ea. In this study, the exercise test showed decreased functional capacity in liver-transplanted children; however, the echocardiographic evaluation did not reveal any definite correlation with systolic or diastolic dysfunction.
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Affiliation(s)
| | - Mitra Moshref
- Pediatric Department, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamid Amoozgar
- Neonatal Research Center and Cardiovascular Research Center, Pediatric Office Nemazee Hospital, Shiraz University of Medical Sciences, 7193711351, Shiraz, Iran.
| | | | - Saman Nikeghbalian
- Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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19
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Trivedi HD, Tapper EB. Interventions to improve physical function and prevent adverse events in cirrhosis. Gastroenterol Rep (Oxf) 2018; 6:13-20. [PMID: 29479438 PMCID: PMC5806401 DOI: 10.1093/gastro/gox042] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 11/26/2017] [Accepted: 12/01/2017] [Indexed: 12/12/2022] Open
Abstract
Cirrhosis is associated with debilitating complications that significantly impact on a patient’s physical function and reduce quality of life. Owing to highly prevalent sarcopenia, malnutrition and hepatic encephalopathy, functional impairment or frailty is a common complication of cirrhosis. Frailty in turn increases the patient’s risk of hospitalization, accidental falls and fractures, and death. The management of frailty and its associated adverse effects is imperative in improving the overall prognosis of patients with advanced liver disease. The cornerstone of therapy revolves around optimizing physical function with appropriate nutrition and exercise. Nutritional therapy with protein supplementation has shown significant benefit, while studies on exercise have been controversial. However, newly emerging studies trend towards a beneficial effect of physical exercise with improvement in quality of life. The implementation of technology in liver disease management shows future promise. Fitbits and other wearable devices can be used to help monitor a patient’s personal progress in physical exercise and nutritional optimization. Additionally, the progressive development of new smartphone applications to help aid in the diagnosis and monitoring of complications of cirrhosis provides a sophisticated avenue for improving care of patients with cirrhosis.
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Affiliation(s)
- Hirsh D Trivedi
- Liver Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Elliot B Tapper
- Department of Hepatology, University of Michigan, Ann Arbor, MI, USA
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20
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Kruger C, McNeely ML, Bailey RJ, Yavari M, Abraldes JG, Carbonneau M, Newnham K, DenHeyer V, Ma M, Thompson R, Paterson I, Haykowsky MJ, Tandon P. Home Exercise Training Improves Exercise Capacity in Cirrhosis Patients: Role of Exercise Adherence. Sci Rep 2018; 8:99. [PMID: 29311671 PMCID: PMC5758716 DOI: 10.1038/s41598-017-18320-y] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/28/2017] [Indexed: 12/13/2022] Open
Abstract
Cirrhosis patients have reduced peak aerobic power (peak VO2) that is associated with reduced survival. Supervised exercise training increases exercise tolerance. The effect of home-based exercise training (HET) in cirrhosis is unknown. The objective was to evaluate the safety and efficacy of 8 weeks of HET on peak VO2, 6-minute walk distance (6MWD), muscle mass, and quality of life in cirrhosis. Random assignment to 8 weeks of HET (moderate to high intensity cycling exercise, 3 days/week) or usual care. Exercise adherence defined as completing ≥80% training sessions. Paired t-tests and analysis of covariance used for comparisons. Forty patients enrolled: 58% male, mean age 57 y, 70% Child Pugh-A. Between group increases in peak VO2 (1.7, 95% CI: −0.33 to 3.7 ml/kg/min, p = 0.09) and 6MWD (33.7, 95% CI: 5.1 to 62.4 m, p = 0.02) were greater after HET versus usual care. Improvements even more marked in adherent subjects for peak VO2 (2.8, 95% CI: 0.5–5.2 mL/kg/min, p = 0.02) and 6MWD (46.4, 95% CI: 12.4–80.5 m, p = 0.009). No adverse events occurred during testing or HET. Eight weeks of HET is a safe and effective intervention to improve exercise capacity in cirrhosis, with maximal benefits occurring in those who complete ≥80% of the program.
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Affiliation(s)
- Calvin Kruger
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada.,Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
| | - Margaret L McNeely
- Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
| | - Robert J Bailey
- Liver Health Clinic, Royal Alexandra Hospital, Edmonton, AB, Canada
| | - Milad Yavari
- Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
| | - Juan G Abraldes
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Michelle Carbonneau
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Kim Newnham
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Vanessa DenHeyer
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Mang Ma
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Richard Thompson
- Department of Biomedical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Ian Paterson
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Mark J Haykowsky
- College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas, USA
| | - Puneeta Tandon
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada. .,Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada.
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21
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Wallen MP, Hall A, Dias KA, Ramos JS, Keating SE, Woodward AJ, Skinner TL, Macdonald GA, Arena R, Coombes JS. Impact of beta-blockers on cardiopulmonary exercise testing in patients with advanced liver disease. Aliment Pharmacol Ther 2017; 46:741-747. [PMID: 28805258 DOI: 10.1111/apt.14265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/14/2017] [Accepted: 07/23/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Patients with advanced liver disease may develop portal hypertension that can result in variceal haemorrhage. Beta-blockers reduce portal pressure and minimise haemorrhage risk. These medications may attenuate measures of cardiopulmonary performance, such as the ventilatory threshold and peak oxygen uptake measured via cardiopulmonary exercise testing. AIM To determine the effect of beta-blockers on cardiopulmonary exercise testing variables in patients with advanced liver disease. METHODS This was a cross-sectional analysis of 72 participants who completed a cardiopulmonary exercise test before liver transplantation. All participants remained on their usual beta-blocker dose and timing prior to the test. Variables measured during cardiopulmonary exercise testing included the ventilatory threshold, peak oxygen uptake, heart rate, oxygen pulse, the oxygen uptake efficiency slope and the ventilatory equivalents for carbon dioxide slope. RESULTS Participants taking beta-blockers (n = 28) had a lower ventilatory threshold (P <.01) and peak oxygen uptake (P = .02), compared to participants not taking beta-blockers. After adjusting for age, the model of end-stage liver-disease score, liver-disease aetiology, presence of refractory ascites and ventilatory threshold remained significantly lower in the beta-blocker group (P = .04). The oxygen uptake efficiency slope was not impacted by beta-blocker use. CONCLUSIONS Ventilatory threshold is reduced in patients with advanced liver disease taking beta-blockers compared to those not taking the medication. This may incorrectly risk stratify patients on beta-blockers and has implications for patient management before and after liver transplantation. The oxygen uptake efficiency slope was not influenced by beta-blockers and may therefore be a better measure of cardiopulmonary performance in this patient population.
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Affiliation(s)
- M P Wallen
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity and Health(CRExPAH), The University of Queensland, Brisbane, Qld, Australia
| | - A Hall
- Department of Anaesthesia, Princess Alexandra Hospital, Brisbane, Qld, Australia
| | - K A Dias
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity and Health(CRExPAH), The University of Queensland, Brisbane, Qld, Australia
| | - J S Ramos
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity and Health(CRExPAH), The University of Queensland, Brisbane, Qld, Australia
| | - S E Keating
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity and Health(CRExPAH), The University of Queensland, Brisbane, Qld, Australia
| | - A J Woodward
- Department of Gastroenterology and Hepatology, Princess Alexandra Hospital, Brisbane, Qld, Australia.,School of Medicine, The University of Queensland, Brisbane, Qld, Australia
| | - T L Skinner
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity and Health(CRExPAH), The University of Queensland, Brisbane, Qld, Australia
| | - G A Macdonald
- Department of Gastroenterology and Hepatology, Princess Alexandra Hospital, Brisbane, Qld, Australia.,School of Medicine, The University of Queensland, Brisbane, Qld, Australia.,Department of Physical Therapy, College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - R Arena
- Translational Research Institute, Brisbane, Qld, Australia
| | - J S Coombes
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity and Health(CRExPAH), The University of Queensland, Brisbane, Qld, Australia
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22
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Development of a clinical applicable graphical user interface to automatically detect exercise oscillatory ventilation: The VOdEX-tool. Int J Cardiol 2017; 240:291-296. [DOI: 10.1016/j.ijcard.2016.12.159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/14/2016] [Accepted: 12/18/2016] [Indexed: 12/28/2022]
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23
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Neviere R, Trinh-Duc P, Hulo S, Edme JL, Dehon A, Boleslawski E, Dharancy S, Lebuffe G. Predictive value of exhaled nitric oxide and aerobic capacity for sepsis complications after liver transplantation. Transpl Int 2016; 29:1307-1316. [PMID: 27649520 DOI: 10.1111/tri.12861] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 04/27/2016] [Accepted: 09/12/2016] [Indexed: 12/17/2022]
Abstract
Our objective was to investigate the predictive value of fractional nitric oxide (NO) concentration in exhaled breath (FeNO) and aerobic capacity (peak VO2 ) for postoperative sepsis in liver transplantation candidates. Patients were identified and charts of all consecutive patients were prospectively reviewed. Bacterial sepsis represented the commonest postoperative complications (30%), which was attributed to peritonitis, pneumonia, and catheter-related infections. Preoperative FeNO and peak VO2 values were lower in patients with postoperative sepsis. Patients with sepsis required higher needs for mechanical ventilation and ICU length of stay. Inverse correlation was found between logarithmically FeNO-transformed data and systolic pulmonary artery pressure (r = -0.348; P = 0.018). Multivariate analyses using bootstrap sampling method indicated that odds of sepsis were associated with lower values of peak exercise VO2 [OR = 0.790 (0.592; 0.925)] and reduced log(FeNo) [OR = 0.027 (0.001; 0.451)], but not with higher MELD scores [OR = 1.141 (0.970; 1.486)]. By evaluating the cutoff for the ROC curves in each bootstrap resampling, median and 95% confidence interval were calculated for peak VO2 : 17 [16.2; 22] ml/kg/min and FeNO: 17.2 [13.0; 33.9] ppb. We conclude that low peak exercise VO2 and reduced FeNO may help identify patients who are at risk to develop perioperative sepsis.
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Affiliation(s)
- Remi Neviere
- Service d'Explorations Fonctionnelles Respiratoires, Hôpital Calmette, CHU Lille, Lille, France.,Département de Physiologie, Faculté of Médicine - INSERM U995, Université Lille, Lille, France
| | | | - Sébastien Hulo
- Service d'Explorations Fonctionnelles Respiratoires, Hôpital Calmette, CHU Lille, Lille, France.,Département de Médecine du Travail, EA4483 Faculté of Médicine, Université Lille, Lille, France
| | - Jean Louis Edme
- Service d'Explorations Fonctionnelles Respiratoires, Hôpital Calmette, CHU Lille, Lille, France.,Département de Médecine du Travail, EA4483 Faculté of Médicine, Université Lille, Lille, France
| | - Aurélie Dehon
- Pôle d'Anesthésie Réanimation ADRU, CHU Nîmes, Lille, France
| | - Emmanuel Boleslawski
- Service de Chirurgie Digestive et de Transplantation, Hôpital Huriez, CHU Lille, Lille, France
| | - Sébastien Dharancy
- Service des Maladies de l'Appareil Digestif et de la Nutrition, Hôpital Huriez, CHU Lille, Lille, France
| | - Gilles Lebuffe
- Pôle d'Anesthésie Réanimation, Université de Lille, CHU Lille, EA7365 - GRITA - Groupe de Recherche sur les Formes Injectables et technologies Associées, Lille, France
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24
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Wallen MP, Skinner TL, Pavey TG, Hall A, Macdonald GA, Coombes JS. Safety, adherence and efficacy of exercise training in solid-organ transplant candidates: A systematic review. Transplant Rev (Orlando) 2016; 30:218-26. [DOI: 10.1016/j.trre.2016.07.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 04/06/2016] [Accepted: 07/13/2016] [Indexed: 01/24/2023]
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25
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Ney M, Haykowsky MJ, Vandermeer B, Shah A, Ow M, Tandon P. Systematic review: pre- and post-operative prognostic value of cardiopulmonary exercise testing in liver transplant candidates. Aliment Pharmacol Ther 2016; 44:796-806. [PMID: 27539029 DOI: 10.1111/apt.13771] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/15/2016] [Accepted: 07/28/2016] [Indexed: 01/12/2023]
Abstract
BACKGROUND Cardiopulmonary exercise testing (CPET) is the gold standard for the objective assessment of functional status. In many conditions, CPET outperforms the traditional variables in predicting mortality. AIM In patients with cirrhosis listed for liver transplantation, our primary aim was to determine the prognostic value of CPET for pre-and post-transplant mortality and, in particular, whether CPET remained predictive after adjustment for liver disease severity. METHODS A systematic literature review was conducted in databases Medline, Scopus, Embase and PubMed. Where possible, data were pooled for meta-analyses using a DerSimonian and Laird random effects model. RESULTS A total of seven studies were retrieved, including 1107 patients with a mean MELD of 14.2 (standard deviation 1.6) and peak baseline VO2 of 17.4 mL/kg/min. In all of the studies in which multivariable analysis was performed, CPET variables were independent predictors of pre-transplant mortality (three studies) and post-transplant mortality (four studies). In the three studies where we could aggregate post-transplant mortality data, post-transplant mortality was predicted by AT with a mean difference of 2.0 (95% confidence interval, CI: 0.42-3.59; Z = 2.48, P = 0.01) between survivors and nonsurvivors. The peak VO2 was not significant (0.77 95% CI: -1.36 to 2.90; Z = 0.71, P = 0.48). CONCLUSIONS Patient's listed for liver transplant have significant functional limitations, with a weighted mean VO2 below the threshold level required for independent living. Although heterogeneity in study designs with respect to timing, CPET variables, and cut-off values precluded the determination of CPET mortality thresholds, the studies support CPET as an objective and independent predictor of pre- and post-transplant mortality.
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Affiliation(s)
- M Ney
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada.,Centre of Excellence for Gastrointestinal Inflammation and Immunity Research (CEGIIR), University of Alberta, Edmonton, AB, Canada
| | - M J Haykowsky
- College of Nursing and Health Innovation, The University of Texas at Arlington, Arlington, TX, USA
| | - B Vandermeer
- Alberta Research Centre for Health Evidence (ARCHE), Department of Pediatrics, University of Alberta, Edmonton, AB, Canada
| | - A Shah
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada.,Centre of Excellence for Gastrointestinal Inflammation and Immunity Research (CEGIIR), University of Alberta, Edmonton, AB, Canada
| | - M Ow
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - P Tandon
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB, Canada. .,Centre of Excellence for Gastrointestinal Inflammation and Immunity Research (CEGIIR), University of Alberta, Edmonton, AB, Canada.
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Masuda T, Kuramoto M, Tanimoto H, Yamamoto K, Ikeshima S, Kitano Y, Kuroda D, Shimada S, Baba H. Intraoperative baseline oxygen consumption as a prognostic factor in emergency open abdominal surgery. J Crit Care 2016; 32:42-7. [DOI: 10.1016/j.jcrc.2015.11.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 11/16/2015] [Accepted: 11/16/2015] [Indexed: 01/06/2023]
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Berzigotti A, Saran U, Dufour JF. Physical activity and liver diseases. Hepatology 2016; 63:1026-40. [PMID: 26313307 DOI: 10.1002/hep.28132] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 08/20/2015] [Indexed: 02/06/2023]
Abstract
UNLABELLED Regular physical activity beneficially impacts the risk of onset and progression of several chronic diseases. However, research regarding the effects of exercising on chronic liver diseases is relatively recent. Most researchers focused on nonalcoholic fatty liver disease (NAFLD), in which increasing clinical and experimental data indicate that skeletal muscle crosstalking to the adipose tissue and the liver regulates intrahepatic fat storage. In this setting, physical activity is considered to be required in combination with calories restriction to allow an effective decrease of intrahepatic lipid component, and despite that evidence is not conclusive, some studies suggest that vigorous activity might be more beneficial than moderate activity to improve NAFLD/nonalcoholic steatohepatitis. Evidence regarding the effects of exercise on the risk of hepatocellular carcinoma is scarce; some epidemiological studies indicate a lower risk in patients regularly and vigorously exercising. In compensated cirrhosis, exercise acutely increases portal pressure, but in the longer term it has been proved safe and probably beneficial. Decreased aerobic capacity (VO2 ) correlates with mortality in patients with decompensated cirrhosis, who are almost invariably sarcopenic. In these patients, VO2 is improved by physical activity, which might also reduce the risk of hepatic encephalopathy through an increase in skeletal muscle mass. In solid organ transplantation recipients, exercise is able to improve lean mass, muscle strength, and, as a consequence, aerobic capacity. Few data exist in liver transplant recipients, in whom exercise should be an object of future studies given its high potential of providing long-term beneficial effects. CONCLUSIONS Despite that evidence is far from complete, physical activity should be seen as an important part of the management of patients with liver disease in order to improve their clinical outcome.
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Affiliation(s)
- Annalisa Berzigotti
- Hepatology, University Clinic of Visceral Surgery and Medicine, Inselspital Berne, Berne, Switzerland
| | - Uttara Saran
- Hepatology, Department of Clinical Research, University of Berne, Berne, Switzerland
| | - Jean-François Dufour
- Hepatology, University Clinic of Visceral Surgery and Medicine, Inselspital Berne, Berne, Switzerland.,Hepatology, Department of Clinical Research, University of Berne, Berne, Switzerland
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Moran J, Wilson F, Guinan E, McCormick P, Hussey J, Moriarty J. Role of cardiopulmonary exercise testing as a risk-assessment method in patients undergoing intra-abdominal surgery: a systematic review. Br J Anaesth 2016; 116:177-91. [DOI: 10.1093/bja/aev454] [Citation(s) in RCA: 278] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Cornelis J, Beckers P, Vanroy C, Volckaerts T, Vrints C, Vissers D. An overview of the applied definitions and diagnostic methods to assess exercise oscillatory ventilation--a systematic review. Int J Cardiol 2015; 190:161-9. [PMID: 25918072 DOI: 10.1016/j.ijcard.2015.04.111] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 04/14/2015] [Indexed: 12/17/2022]
Abstract
The variable "exercise oscillatory ventilation" (EOV), assessed during cardiopulmonary exercise test (CPET), recently became a fundamental prognostic parameter in patients with heart failure. In literature, various definitions are suggested, but an uniformly accepted description to identify EOV still lacks. We performed a systematic review of the literature in order to determine the different definitions and diagnostic techniques to assess EOV. A systematic search strategy was established and executed in seven databases (PubMed, Google Scholar, Cochrane Clinical Trials, Science Direct, Pedro, Web Of Science library and Medline (Ovid)) resulting in 605 citations after de-duplication. Full-text articles (n=124) were assessed for eligibility, resulting in 75 citations. The review accounted 17,440 patients of whom 4,638 subjects presented EOV. Seven studies described EOV in a non-heart failure population accounting 168 EOV subjects. The definitions could be categorized in nine subdivisions of which four (n=43) referred to an original description. The other subdivisions were combinations of the original definitions (n=11), quantifications (n=4), computational (n=3), vaguely described (n=8) or not defined (n=6). Symptom limited maximal exercise tests were conducted to assess EOV, however the modes, protocols, software and data sampling were divers. Heterogeneity in the numerous definitions to identify EOV and the vaguely described assessment methods are hindering the evolution to a standardized uniformly accepted definition and technique to identify this abnormal breathing pattern. Unity in definition and international adopted assessment is warranted to strengthen its validity as a prognostic marker and could promote communication. It may facilitate clinical trials on pathophysiology and origin of EOV.
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Affiliation(s)
- Justien Cornelis
- University of Antwerp (Faculty of Medicine and Health Sciences), Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium.
| | - Paul Beckers
- University of Antwerp (Faculty of Medicine and Health Sciences), Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium; Antwerp University Hospital, Department of Cardiology, Wilrijkstraat 10, B-2650 Edegem, Belgium; University of Antwerp (Faculty of Medicine and Health Sciences), Department of Medicine, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Christel Vanroy
- University of Antwerp (Faculty of Medicine and Health Sciences), Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium; University of Leuven (Faculty of Kinesiology and Rehabilitation Sciences), Tervuursevest 101, B-3001 Heverlee, Belgium; University of Antwerp (Faculty of Medicine and Health Sciences), Translational Neurosciences, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Tess Volckaerts
- University of Antwerp (Faculty of Medicine and Health Sciences), Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium
| | - Christiaan Vrints
- Antwerp University Hospital, Department of Cardiology, Wilrijkstraat 10, B-2650 Edegem, Belgium; University of Antwerp (Faculty of Medicine and Health Sciences), Department of Medicine, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Dirk Vissers
- University of Antwerp (Faculty of Medicine and Health Sciences), Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium
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Prognostic respiratory parameters in heart failure patients with and without exercise oscillatory ventilation — A systematic review and descriptive meta-analysis. Int J Cardiol 2015; 182:476-86. [DOI: 10.1016/j.ijcard.2015.01.029] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/06/2015] [Accepted: 01/10/2015] [Indexed: 12/21/2022]
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Ney M, Abraldes JG, Ma M, Belland D, Harvey A, Robbins S, Den Heyer V, Tandon P. Insufficient Protein Intake Is Associated With Increased Mortality in 630 Patients With Cirrhosis Awaiting Liver Transplantation. Nutr Clin Pract 2015; 30:530-6. [PMID: 25667232 DOI: 10.1177/0884533614567716] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND For patients awaiting liver transplantation, we aimed to determine the prevalence and predictors of insufficient protein intake as well as to determine whether very low protein intake was an independent predictor of malnutrition and mortality. MATERIALS AND METHODS Adults with cirrhosis who were activated on our local liver transplant waiting list between January 2000 and October 2009 were included. Estimated protein intake was derived from dietary records. Patients with incomplete dietary records were excluded. Multivariable logistic regression and competing risk analysis were used. RESULTS Of 742 potential patients, 112 were excluded due to insufficient data, leaving 630 patients for evaluation. Mean protein intake was 1.0 ± 0.36 g/kg/d and only 24% of patients met the expert consensus recommended threshold of > 1.2 g/kg of protein per day. Very low protein intake (< 0.8 g/kg/d) was associated with worse liver disease severity (as measured by Child-Pugh or MELD). Protein intake below 0.8 g/kg/d was an independent predictor both of malnutrition as measured by the subjective global assessment (adjusted odds ratio [95% confidence interval (CI)]: 2.0 [1.3-3.0]) and of transplant waiting list mortality (adjusted hazard ratio [95% CI]: 1.8 [1.2-2.7]). CONCLUSION In this large cohort of liver transplant waitlisted patients, very low protein intake was prevalent and independently associated with malnutrition and mortality. Unlike many other prognostic factors, protein intake is potentially modifiable. Prospective studies are warranted to evaluate the effect of targeted protein repletion on clinically relevant outcomes such as muscle mass, muscle function, immune function, and mortality.
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Affiliation(s)
- Michael Ney
- Cirrhosis Care Clinic, Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Juan G Abraldes
- Cirrhosis Care Clinic, Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada Liver Transplant Unit, University of Alberta, Edmonton, Alberta, Canada
| | - Mang Ma
- Cirrhosis Care Clinic, Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada Liver Transplant Unit, University of Alberta, Edmonton, Alberta, Canada
| | - Dawn Belland
- Liver Transplant Unit, University of Alberta, Edmonton, Alberta, Canada
| | - Andrea Harvey
- Liver Transplant Unit, University of Alberta, Edmonton, Alberta, Canada
| | - Sarah Robbins
- Division of Gastroenterology, Royal Alexandra Hospital, Edmonton, Alberta, Canada
| | - Vanessa Den Heyer
- Cirrhosis Care Clinic, Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada Liver Transplant Unit, University of Alberta, Edmonton, Alberta, Canada
| | - Puneeta Tandon
- Cirrhosis Care Clinic, Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada Liver Transplant Unit, University of Alberta, Edmonton, Alberta, Canada
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Zenith L, Meena N, Ramadi A, Yavari M, Harvey A, Carbonneau M, Ma M, Abraldes JG, Paterson I, Haykowsky MJ, Tandon P. Eight weeks of exercise training increases aerobic capacity and muscle mass and reduces fatigue in patients with cirrhosis. Clin Gastroenterol Hepatol 2014; 12:1920-6.e2. [PMID: 24768811 DOI: 10.1016/j.cgh.2014.04.016] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 03/25/2014] [Accepted: 04/08/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Patients with cirrhosis have reduced exercise tolerance, measured objectively as decreased peak exercise oxygen uptake (peak VO2). Reduced peak VO2 is associated with decreased survival time. The effect of aerobic exercise training on peak VO2 has not been well studied in patients with cirrhosis. We evaluated the safety and efficacy of 8 weeks of supervised exercise on peak VO2, quadriceps muscle thickness, and quality of life. METHODS In a prospective pilot study, stable patients (79% male, 57.6 ± 6.7 years old) with Child-Pugh class A or B cirrhosis (mean Model for End-Stage Liver Disease score, 10 ± 2.2) were randomly assigned to groups that received exercise training (n = 9) or usual care (controls, n = 10) at the University of Alberta Hospital in Canada from February through June 2013. Supervised exercise was performed on a cycle ergometer 3 days/week for 8 weeks at 60%-80% of baseline peak VO2. Peak VO2, quadriceps muscle thickness (measured by ultrasound), thigh circumference, answers from Chronic Liver Disease Questionnaires, EQ-visual analogue scales, 6-minute walk distance, and Model for End-Stage Liver Disease scores were evaluated at baseline and at week 8. Analysis of covariance was used to compare variables. RESULTS At week 8, peak VO2 was 5.3 mL/kg/min higher in the exercise group compared with controls (95% confidence interval, 2.9-7.8; P = .001). Thigh circumference (P = .001), thigh muscle thickness (P = .01), and EQ-visual analogue scale determined self-perceived health status (P = .01) was also significantly higher in the exercise group compared with controls at week 8; fatigue subscores of the Chronic Liver Disease Questionnaires were lower in the exercise group compared with controls (P = .01). No adverse events occurred during cardiopulmonary exercise testing or training. CONCLUSIONS In a controlled prospective pilot trial, 8 weeks of supervised aerobic exercise training increased peak VO2 and muscle mass and reduced fatigue in patients with cirrhosis. No relevant adverse effects were observed. Larger trials are needed to evaluate the effects of exercise in patients with cirrhosis. ClinicalTrials.gov number: NCT01799785.
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Affiliation(s)
- Laura Zenith
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB
| | - Neha Meena
- Faculty of Rehabilitation Medicine, University of Alberta, Alberta Cardiovascular and Stroke Research Centre (ABACUS), Mazankowski Alberta Heart Institute, Edmonton, AB, Canada
| | - Ailar Ramadi
- Faculty of Rehabilitation Medicine, University of Alberta, Alberta Cardiovascular and Stroke Research Centre (ABACUS), Mazankowski Alberta Heart Institute, Edmonton, AB, Canada
| | - Milad Yavari
- Faculty of Rehabilitation Medicine, University of Alberta, Alberta Cardiovascular and Stroke Research Centre (ABACUS), Mazankowski Alberta Heart Institute, Edmonton, AB, Canada
| | - Andrea Harvey
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB
| | - Michelle Carbonneau
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB
| | - Mang Ma
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB
| | - Juan G Abraldes
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB
| | - Ian Paterson
- Division of Cardiology, Department of Medicine, University of Alberta, Edmonton, AB
| | - Mark J Haykowsky
- Faculty of Rehabilitation Medicine, University of Alberta, Alberta Cardiovascular and Stroke Research Centre (ABACUS), Mazankowski Alberta Heart Institute, Edmonton, AB, Canada
| | - Puneeta Tandon
- Cirrhosis Care Clinic, Department of Medicine, University of Alberta, Edmonton, AB.
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Yuan H, Tuttle-Newhall JE, Chawa V, Schnitzler MA, Xiao H, Axelrod D, Dzebisashvili N, Lentine KL. Prognostic impact of mechanical ventilation after liver transplantation: a national database study. Am J Surg 2014; 208:582-90. [PMID: 25151187 DOI: 10.1016/j.amjsurg.2014.06.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 05/27/2014] [Accepted: 06/03/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND The impact of mechanical ventilatory support (MCVS) on mortality and graft loss after liver transplantation (LT) is not well described. METHODS Multivariate analysis of a novel database linking national transplant registry and Medicare claims data was used to assess the impact of early MCVS on mortality and graft survival following LTs performed between 2002 and 2008. RESULTS Among 10,517 LT recipients, 6.9% (n = 726) required postoperative MCVS, 25.6% of whom required less than 96 hours, 24.2% required 96 hours or longer, and 50.1% received an unspecified duration. Significant predictors of prolonged MCVS included older age, female sex, pretransplant dialysis requirement, and ascites. After multivariate adjustment, MCVS of 96 hours or longer was associated with nearly 3 times the adjusted hazard ratio of mortality (2.95, P < .001), while MCVS less than 96 hours was not significantly associated with mortality (adjusted hazard ratio .88, P = .55). CONCLUSIONS Recognition of LT patients at risk for prolonged MCVS may help to reduce the incidence and consequences of this complication.
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Affiliation(s)
- Hui Yuan
- Department of Anesthesia, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Janet E Tuttle-Newhall
- Department of Anesthesia, Saint Louis University School of Medicine, St. Louis, MO, USA; Department of Surgery, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Vikram Chawa
- Department of Anesthesia, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Mark A Schnitzler
- Department of Surgery, Saint Louis University School of Medicine, St. Louis, MO, USA; Center for Outcomes Research, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Huiling Xiao
- Center for Outcomes Research, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - David Axelrod
- Department of Surgery, Dartmouth Hitchcock Medical Center, Hanover, NH, USA
| | - Nino Dzebisashvili
- Department of Surgery, Dartmouth Hitchcock Medical Center, Hanover, NH, USA
| | - Krista L Lentine
- Department of Surgery, Saint Louis University School of Medicine, St. Louis, MO, USA; Department of Surgery, Dartmouth Hitchcock Medical Center, Hanover, NH, USA.
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