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Laurent-Lacroix C, Vincenti M, Matecki S, Mahé P, Moulis L, De La Villeon G, Guillaumont S, Requirand A, Moreau J, Lalande M, Picot MC, Amedro P, Gavotto A. Aerobic physical capacity and health-related quality of life in children with sickle cell disease. Pediatr Res 2024:10.1038/s41390-024-03143-1. [PMID: 38491141 DOI: 10.1038/s41390-024-03143-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/01/2024] [Accepted: 02/17/2024] [Indexed: 03/18/2024]
Abstract
BACKGROUND Aerobic fitness is a predictor of cardiovascular health which correlates with health-related quality of life in the general population. The aim is to evaluate the aerobic capacity by cardiopulmonary exercise test (CPET) in children with sickle cell disease in comparison with healthy matched controls. METHODS Controlled cross-sectional study. RESULTS A total of 72 children (24 with sickle cell disease and 48 healthy controls), aged 6-17 years old were enrolled. Children with sickle cell disease had a poor aerobic capacity, with median VO2max Z-score values significantly lower than matched controls (-3.55[-4.68; -2.02] vs. 0.25[-0.22; 0.66], P < 0.01, respectively), and a high proportion of 92% children affected by an impaired aerobic capacity (VO2max Z-score < -1.64). The VO2max decrease was associated with the level of anemia, the existence of a homozygote HbS/S mutation, restrictive lung disease and health-related quality of life. CONCLUSION Aerobic capacity is poor in children with sickle cell disease. VO2max decrease is associated with the level of anemia, the existence of a homozygote HbS/S mutation, lung function, and health-related quality of life. These results represent a signal in favor of early initiation of cardiac rehabilitation in patients with sickle cell disease. CLINICAL TRIALS NCT05995743. IMPACT Aerobic fitness is a predictor of cardiovascular health which correlates with health-related quality of life in the general population. Aerobic capacity (VO2max) is poor in children with sickle cell disease, despite the absence of any pattern of heart failure. VO2max decrease was associated with the level of anemia, the existence of a homozygote HbS/S mutation, restrictive lung disease, and health-related quality of life. These results are in favor of early initiation of cardiac rehabilitation in children with sickle cell disease.
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Affiliation(s)
- Corentin Laurent-Lacroix
- Department of Pediatric and Congenital Cardiology, M3C Regional Reference CHD Centre, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
| | - Marie Vincenti
- Department of Pediatric and Congenital Cardiology, M3C Regional Reference CHD Centre, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- PhyMedExp, CNRS, INSERM, University of Montpellier, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
| | - Stefan Matecki
- PhyMedExp, CNRS, INSERM, University of Montpellier, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- Pediatric Functional Exploration Laboratory, Physiology Department, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
| | - Perrine Mahé
- Pediatric Department, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- Reference Center on Rare Red Cell Disorders, Montpellier University Hospital, 34000, Montpellier, France
| | - Lionel Moulis
- Clinical Research and Epidemiology Unit, Montpellier University Hospital, 34000, Montpellier, France
| | - Gregoire De La Villeon
- Department of Pediatric and Congenital Cardiology, M3C Regional Reference CHD Centre, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- Pediatric Cardiology and Rehabilitation Unit, St-Pierre Institute, 371 Avenue de l'Évêché de Maguelone, 34250, Palavas-Les-Flots, France
| | - Sophie Guillaumont
- Department of Pediatric and Congenital Cardiology, M3C Regional Reference CHD Centre, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- Pediatric Cardiology and Rehabilitation Unit, St-Pierre Institute, 371 Avenue de l'Évêché de Maguelone, 34250, Palavas-Les-Flots, France
| | - Anne Requirand
- Pediatric Functional Exploration Laboratory, Physiology Department, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
| | - Johan Moreau
- Pediatric Functional Exploration Laboratory, Physiology Department, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- Department of Pediatric Pneumology, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
| | - Muriel Lalande
- Pediatric Department, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France
- Reference Center on Rare Red Cell Disorders, Montpellier University Hospital, 34000, Montpellier, France
| | - Marie-Christine Picot
- Clinical Research and Epidemiology Unit, Montpellier University Hospital, 34000, Montpellier, France
- Clinical Investigation Centre, INSERM-CIC 1411, University of Montpellier, 34000, Montpellier, France
| | - Pascal Amedro
- Department of Pediatric and Congenital Cardiology, M3C National Reference Centre, Bordeaux University Hospital, 1 Avenue Magellan, 33604, Pessac, France
- IHU Liryc, Electrophysiology and Heart Modelling Institute, INSERM 1045, Bordeaux University Foundation, Avenue du Haut Lévêque, 33600, Pessac, France
| | - Arthur Gavotto
- PhyMedExp, CNRS, INSERM, University of Montpellier, 371 Avenue du Doyen Giraud, 34295, Montpellier, France.
- Pediatric Intensive Care Unit, Arnaud de Villeneuve Hospital, Montpellier University Hospital, 371 Avenue du Doyen Giraud, 34295, Montpellier, France.
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Hammoudi N, Ceccaldi A, Haymann JP, Guedeney P, Nicolas-Jilwan F, Zeitouni M, Montalescot G, Lionnet F, Isnard R, Hatem SN. Altered cardiac reserve is a determinant of exercise intolerance in sickle cell anaemia patients. Eur J Clin Invest 2022; 52:e13664. [PMID: 34390499 DOI: 10.1111/eci.13664] [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: 05/17/2021] [Revised: 07/18/2021] [Accepted: 08/12/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND The underlying mechanisms of exercise intolerance in sickle cell anaemia (SCA) patients are complex and not yet completely understood. While latent heart failure at rest could be unmasked upon exercise, most previous studies assessed cardiac function at rest. We aimed to investigate exercise cardiovascular reserve as a potential contributor to exercise intolerance in adult SCA patients. METHODS In this observational prospective study, we compared prospectively 60 SCA patients (median age 31 years, 60% women) to 20 matched controls. All subjects underwent symptom-limited combined exercise echocardiography and oxygen uptake (VO2 ) measurements. Differences between arterial and venous oxygen content (C(a-v)O2 ) were calculated. Cardiac reserve was defined as the absolute change in cardiac index (Ci) from baseline to peak exercise. RESULTS Compared to controls, SCA patients demonstrated severe exercise intolerance (median peakVO2 , 34.3 vs. 19.7 ml/min/kg, respectively, p < .0001). SCA patients displayed heterogeneously increased Ci from rest to peak exercise (median +5.8, range 2.6 to 10.6 L/min/m²) which correlated with peakVO2 (r = 0.71, p < .0001). In contrast, the C(a-v)O2 exercise reserve was homogenously reduced and did not correlate with peakVO2 (r = 0.18, p = .16). While haemoglobin level and C(a-v)O2 were similar in SCA subgroups, SCA patients in the lower VO2 tertile had chronotropic incompetence and left ventricular diastolic dysfunction (left atrial peak longitudinal strain was reduced, and both E/e' ratio and left atrial volume index were increased) and were characterized by a reduced cardiac reserve, +5.0[4.2-5.5] compared to +6.7[5.5-7.8] L/min/m² for the rest of the patient cohort, p < .0001. CONCLUSIONS Altered cardiac reserve due to chronotropic incompetence and left ventricular diastolic dysfunction seems to be an important determinant of exercise intolerance in adult SCA patients.
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Affiliation(s)
- Nadjib Hammoudi
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
| | - Alexandre Ceccaldi
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
| | - Jean-Philippe Haymann
- Département de physiologie et de néphrologie (AP-HP), Centre Hospitalier Universitaire Tenon, Sorbonne Université, INSERM UPMC 1155, Paris, France
| | - Paul Guedeney
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
| | - Fadila Nicolas-Jilwan
- Département de physiologie et de néphrologie (AP-HP), Centre Hospitalier Universitaire Tenon, Sorbonne Université, INSERM UPMC 1155, Paris, France
| | - Michel Zeitouni
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
| | - Gilles Montalescot
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
| | - François Lionnet
- Service de médecine interne, Centre de référence de la drépanocytose (AP-HP), Centre Hospitalier Universitaire Tenon, Sorbonne Université, Paris, France
| | - Richard Isnard
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
| | - Stéphane N Hatem
- Sorbonne Université, ACTION Study Group, INSERM, UMR_S 1166, Institute of Cardiometabolism And Nutrition (ICAN), and Hôpital Pitié-Salpêtrière (AP-HP), Paris, France
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Merlet AN, Chatel B, Hourdé C, Ravelojaona M, Bendahan D, Féasson L, Messonnier LA. How Sickle Cell Disease Impairs Skeletal Muscle Function: Implications in Daily Life. Med Sci Sports Exerc 2019; 51:4-11. [PMID: 30095751 DOI: 10.1249/mss.0000000000001757] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Sickle cell disease (SCD) is the most frequent life-threatening genetic hemoglobinopathy in the world and occurs due to the synthesis of abnormal hemoglobin S (HbS). hemoglobin S-containing red blood cells (RBC) are fragile, leading to hemolysis and anemia, and adhere to the endothelium, leading to hemorheological and hemodynamical disturbances. In its deoxygenated form, HbS may polymerize, leading to sickling of red blood cells and potentially to vasoocclusive crises. Recent findings observed that SCD patients demonstrate significant skeletal muscle remodeling and display reduced muscle functional capacities, contributing to exercise intolerance and poor quality of life. Although acute high-intensity exercise is not recommended for SCD patients because it may increase the risk of sickling, regular moderate-intensity physical activity could have beneficial effects on skeletal muscle and more generally on the well-being of SCD patients. This article reviews the literature regarding the impact of the disease on muscular tissue characteristics and function, as well as the corresponding implications for SCD patients' quality of life.
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Affiliation(s)
- Angèle N Merlet
- Inter-university Laboratory of Human Movement Sciences, University of Lyon, UJM Saint-Etienne, Saint-Etienne, FRANCE
| | - Benjamin Chatel
- Inter-university Laboratory of Human Movement Sciences, University of Savoie Mont Blanc, Chambéry, FRANCE.,Aix-Marseille University, Marseille, FRANCE
| | - Christophe Hourdé
- Inter-university Laboratory of Human Movement Sciences, University of Savoie Mont Blanc, Chambéry, FRANCE
| | - Marion Ravelojaona
- Inter-university Laboratory of Human Movement Sciences, University of Lyon, UJM Saint-Etienne, Saint-Etienne, FRANCE.,Myology Unit, Department of Clinical and Exercise Physiology, University Hospital of Saint-Etienne, Saint-Etienne, FRANCE
| | | | - Léonard Féasson
- Inter-university Laboratory of Human Movement Sciences, University of Lyon, UJM Saint-Etienne, Saint-Etienne, FRANCE.,Inter-university Laboratory of Human Movement Sciences, University of Savoie Mont Blanc, Chambéry, FRANCE.,Aix-Marseille University, Marseille, FRANCE.,Myology Unit, Department of Clinical and Exercise Physiology, University Hospital of Saint-Etienne, Saint-Etienne, FRANCE
| | - Laurent A Messonnier
- Inter-university Laboratory of Human Movement Sciences, University of Savoie Mont Blanc, Chambéry, FRANCE
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Abstract
In African-American children aged 5 to 17 years with and without type SS sickle cell disease (SCD-SS), dominant hand maximal handgrip strength, peak power, and plantar flexion isometric maximal voluntary contraction (MVC) torque were compared with adjustments for body size and composition. Children with SCD-SS (n=21; age, 11±1 y) compared with healthy control children (n=23; 10±1 y) did not differ by age, sex, or maturation stage, but had significantly lower Z scores for height, weight, body mass index, arm circumference, upper arm muscle area, and lean mass-for-height. Children with SCD-SS had significantly lower unadjusted handgrip strength (16±2 vs. 23±2 kg, P<0.01), peak power (1054±107 vs. 1488±169 W, P<0.04) and MVC torques at 2 angles (10 degrees: 27±3 vs. 42±5 Nm; 20 degrees: 21±3 vs. 34±4 Nm; all P<0.05). Performance decrements persisted when handgrip strength was adjusted for lean body mass and fat mass explaining 66% of the variance; peak power adjusted for age, lean body mass, fat mass, and height explaining 91% of the variance; and the highest MVC torque (10-degree angle) adjusted for left leg length, lean mass-for-height, and fat mass-for-height Z scores explaining 65% of the variance. This suggests additional factors contribute to the attenuated anaerobic performance.
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Ramos RP. How can anemia negatively influence gas exchange? J Bras Pneumol 2017; 43:1-2. [PMID: 28380180 PMCID: PMC5790668 DOI: 10.1590/s1806-37562017000100001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Pediatric Exercise Testing: Value and Implications of Peak Oxygen Uptake. CHILDREN-BASEL 2017; 4:children4010006. [PMID: 28125022 PMCID: PMC5296667 DOI: 10.3390/children4010006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 12/15/2016] [Accepted: 01/17/2017] [Indexed: 01/26/2023]
Abstract
Peak oxygen uptake (peakV˙O2) measured by clinical exercise testing is the benchmark for aerobic fitness. Aerobic fitness, estimated from maximal treadmill exercise, is a predictor of mortality in adults. PeakV˙O2 was shown to predict longevity in patients aged 7–35 years with cystic fibrosis over 25 years ago. A surge of exercise studies in young adults with congenital heart disease over the past decade has revealed significant prognostic information. Three years ago, the first clinical trial in children with pulmonary arterial hypertension used peakV˙O2 as an endpoint that likewise delivered clinically relevant data. Cardiopulmonary exercise testing provides clinicians with biomarkers and clinical outcomes, and researchers with novel insights into fundamental biological mechanisms reflecting an integrated physiological response hidden at rest. Momentum from these pioneering observations in multiple disease states should impel clinicians to employ similar methods in other patient populations; e.g., sickle cell disease. Advances in pediatric exercise science will elucidate new pathways that may identify novel biomarkers. Our initial aim of this essay is to highlight the clinical relevance of exercise testing to determine peakV˙O2, and thereby convince clinicians of its merit, stimulating future clinical investigators to broaden the application of exercise testing in pediatrics.
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Martin C, Pialoux V, Faes C, Charrin E, Skinner S, Connes P. Does physical activity increase or decrease the risk of sickle cell disease complications? Br J Sports Med 2015; 52:214-218. [PMID: 26701924 DOI: 10.1136/bjsports-2015-095317] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2015] [Indexed: 12/11/2022]
Abstract
Sickle cell disease (SCD) is the most common inherited disease in the world. Red blood cell sickling, blood cell-endothelium adhesion, blood rheology abnormalities, intravascular haemolysis, and increased oxidative stress and inflammation contribute to the pathophysiology of SCD. Because acute intense exercise may alter these pathophysiological mechanisms, physical activity is usually contra-indicated in patients with SCD. However, recent studies in sickle-cell trait carriers and in a SCD mice model show that regular physical activity could decrease oxidative stress and inflammation, limit blood rheology alterations and increase nitric oxide metabolism. Therefore, supervised habitual physical activity may benefit patients with SCD. This article reviews the literature on the effects of acute and chronic exercise on the biological responses and clinical outcomes of patients with SCD.
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Affiliation(s)
- Cyril Martin
- Center of Research and Innovation on Sports (CRIS EA647), Team 'Vascular Biology and Red Blood Cell', University of Lyon 1, University of Lyon, Lyon, France.,Laboratory of Excellence in Red Blood Cell (LABEX GR-Ex), PRES Sorbonne, Paris, France
| | - Vincent Pialoux
- Center of Research and Innovation on Sports (CRIS EA647), Team 'Vascular Biology and Red Blood Cell', University of Lyon 1, University of Lyon, Lyon, France.,Laboratory of Excellence in Red Blood Cell (LABEX GR-Ex), PRES Sorbonne, Paris, France.,Institut Universitaire de France, Paris, France
| | - Camille Faes
- Center of Research and Innovation on Sports (CRIS EA647), Team 'Vascular Biology and Red Blood Cell', University of Lyon 1, University of Lyon, Lyon, France.,Laboratory of Excellence in Red Blood Cell (LABEX GR-Ex), PRES Sorbonne, Paris, France
| | - Emmanuelle Charrin
- Center of Research and Innovation on Sports (CRIS EA647), Team 'Vascular Biology and Red Blood Cell', University of Lyon 1, University of Lyon, Lyon, France.,Laboratory of Excellence in Red Blood Cell (LABEX GR-Ex), PRES Sorbonne, Paris, France
| | - Sarah Skinner
- Center of Research and Innovation on Sports (CRIS EA647), Team 'Vascular Biology and Red Blood Cell', University of Lyon 1, University of Lyon, Lyon, France.,Laboratory of Excellence in Red Blood Cell (LABEX GR-Ex), PRES Sorbonne, Paris, France
| | - Philippe Connes
- Center of Research and Innovation on Sports (CRIS EA647), Team 'Vascular Biology and Red Blood Cell', University of Lyon 1, University of Lyon, Lyon, France.,Laboratory of Excellence in Red Blood Cell (LABEX GR-Ex), PRES Sorbonne, Paris, France.,Institut Universitaire de France, Paris, France
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Liem RI, Reddy M, Pelligra SA, Savant AP, Fernhall B, Rodeghier M, Thompson AA. Reduced fitness and abnormal cardiopulmonary responses to maximal exercise testing in children and young adults with sickle cell anemia. Physiol Rep 2015; 3:3/4/e12338. [PMID: 25847915 PMCID: PMC4425953 DOI: 10.14814/phy2.12338] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Physiologic contributors to reduced exercise capacity in individuals with sickle cell anemia (SCA) are not well understood. The objective of this study was to characterize the cardiopulmonary response to maximal cardiopulmonary exercise testing (CPET) and determine factors associated with reduced exercise capacity among children and young adults with SCA. A cross-sectional cohort of 60 children and young adults (mean 15.1 ± 3.4 years) with hemoglobin SS or S/β0 thalassemia and 30 matched controls (mean 14.6 ± 3.5 years) without SCA or sickle cell trait underwent maximal CPET by a graded, symptom-limited cycle ergometry protocol with breath-by-breath, gas exchange analysis. Compared to controls without SCA, subjects with SCA demonstrated significantly lower peak VO2 (26.9 ± 6.9 vs. 37.0 ± 9.2 mL/kg/min, P < 0.001). Subjects demonstrated slower oxygen uptake (ΔVO2/ΔWR, 9 ± 2 vs. 12 ± 2 mL/min/watt, P < 0.001) and lower oxygen pulse (ΔVO2/ΔHR, 12 ± 4 vs. 20 ± 7 mL/beat, P < 0.001) as well as reduced oxygen uptake efficiency (ΔVE/ΔVO2, 42 ± 8 vs. 32 ± 5, P < 0.001) and ventilation efficiency (ΔVE/ΔVCO2, 30.3 ± 3.7 vs. 27.3 ± 2.5, P < 0.001) during CPET. Peak VO2 remained significantly lower in subjects with SCA after adjusting for age, sex, body mass index (BMI), and hemoglobin, which were independent predictors of peak VO2 for subjects with SCA. In the largest study to date using maximal CPET in SCA, we demonstrate that children and young adults with SCA have reduced exercise capacity attributable to factors independent of anemia. Complex derangements in gas exchange and oxygen uptake during maximal exercise are common in this population.
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Affiliation(s)
- Robert I Liem
- Department of Pediatrics, Hematology, Oncology & Stem Cell Transplant, Ann & Robert H. Lurie Children's Hospital of Chicago Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Madhuri Reddy
- Department of Pediatrics, Hematology, Oncology & Stem Cell Transplant, Ann & Robert H. Lurie Children's Hospital of Chicago Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Stephanie A Pelligra
- Department of Pediatrics, Hematology, Oncology & Stem Cell Transplant, Ann & Robert H. Lurie Children's Hospital of Chicago Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Adrienne P Savant
- Department of Pediatrics, Pulmonary Medicine Ann & Robert H. Lurie Children's Hospital of Chicago Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Bo Fernhall
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA
| | | | - Alexis A Thompson
- Department of Pediatrics, Hematology, Oncology & Stem Cell Transplant, Ann & Robert H. Lurie Children's Hospital of Chicago Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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9
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Watson A, Liem RI, Lu Z, Saville B, Acra S, Shankar S, Buchowski M. Longitudinal differences in aerobic capacity between children with sickle cell anemia and matched controls. Pediatr Blood Cancer 2015; 62:648-53. [PMID: 25556359 PMCID: PMC4339500 DOI: 10.1002/pbc.25383] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 11/11/2014] [Indexed: 11/07/2022]
Abstract
BACKGROUND The purpose of this study was to compare longitudinal trajectories of maximal aerobic capacity in children with sickle cell anemia (SCA) and matched healthy controls, and explore whether these trajectories were associated with selected physiologic variables. PROCEDURE Children with SCA (n = 33) and healthy controls (n = 30) matched at baseline for race, sex, Tanner stage, height, and weight completed three consecutive annual fitness assessments (VO2peak ). Data were compared between the groups at each time point and within groups over time. Change in VO2peak between the two groups over time was assessed using a linear mixed model with age, sex, fat-free mass (FFM), Tanner stage, and hemoglobin (Hgb) concentration as covariates. RESULTS At baseline, children with SCA had significantly lower Hgb concentration (8.9 vs. 13.7 g/dL, P < 0.001) and relative VO2peak (24.2 vs. 27.9 ml/kg/min, P = 0.006) than healthy controls. Over time, children with SCA had smaller increases than healthy controls in VO2peak (-0.1 and +4.9 ml/kg/min, P < 0.001), Tanner stage at year 2 (15% and 66% Tanner 4, P < 0.001), and FFM (+4.0 and +6.8 kg, P = 0.02). Changes in Hgb concentration did not differ between groups (+0.03 and +0.09 g/dL, P = 1.0). After adjusting for age, sex, Tanner stage, FFM, and Hgb concentration the differences in change in VO2peak over time remained significant (P < 0.001). CONCLUSION Children with SCA demonstrate lower relative VO2peak compared to healthy children and the difference increases over time. The difference in VO2peak trajectories between the two groups during puberty remains significant after adjusting for age, sex, FFM, Tanner stage, and Hgb concentration.
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Affiliation(s)
- Andrew Watson
- Department of Pediatrics, Vanderbilt University School of Medicine
| | - Robert I. Liem
- Division of Hematology, Oncology & Stem Cell Transplant, Ann & Robert H. Lurie Children’s Hospital of Chicago, Department of Pediatrics, Northwestern University Feinberg School of Medicine
| | - Zengqi Lu
- Department of Biostatistics, Vanderbilt University School of Medicine
| | - Ben Saville
- Department of Biostatistics, Vanderbilt University School of Medicine
| | - Sari Acra
- Department of Pediatrics, Vanderbilt University School of Medicine
| | - Sadhna Shankar
- Department of Pediatrics at Children’s National Medical Center, George Washington University School of Medicine
| | - Maciej Buchowski
- Department of Medicine, Vanderbilt University School of Medicine
,Department of Energy Balance Laboratory at Vanderbilt University School of Medicine
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Chaudry RA, Bush A, Rosenthal M, Crowley S. The Impact of Sickle Cell Disease on Exercise Capacity in Children. Chest 2013; 143:478-484. [DOI: 10.1378/chest.12-0611] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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12
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Liem RI, Nevin MA, Prestridge A, Young LT, Thompson AA. Functional capacity in children and young adults with sickle cell disease undergoing evaluation for cardiopulmonary disease. Am J Hematol 2009; 84:645-9. [PMID: 19705433 DOI: 10.1002/ajh.21507] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Although cardiopulmonary disease is associated with decreased functional capacity among adults with sickle cell disease (SCD), its impact on functional capacity in children with SCD is unknown. We evaluated 6-min walk (6MW) distance in 77 children and young adults with SCD undergoing screening for cardiopulmonary disease. Of 30 subjects who also underwent cardiopulmonary exercise testing, we found evidence for decreased exercise capacity in a significant proportion. Exercise capacity was related to baseline degree of anemia and was significantly lower in subjects with a history of recurrent acute chest syndrome. We found that 6MW distance adjusted for weight and body surface area was shorter in subjects with restrictive lung disease but that only 6MW adjusted for weight remained significantly shorter when we controlled for baseline hemoglobin. Exercise capacity was not significantly different in subjects with and without cardiopulmonary disease. We conclude that restrictive lung disease is associated with shorter 6MW distances in children and young adults with SCD, but that variables associated with decreased exercise capacity, other than anemia, remain unclear. Our study underscores the importance of further delineating the direct pathophysiologic processes that contribute to decreased exercise capacity observed among individuals with SCD and cardiopulmonary disease.
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Affiliation(s)
- Robert I Liem
- Division of Hematology, Oncology and Stem Cell Transplant, Children's Memorial Hospital, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60614-3394, USA.
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Abstract
The 100th anniversary of the discovery of sickle cell anemia (SCA) as a distinct clinical entity by James B. Herrick in 1910 will soon be a reality. SCA continues to present opportunities for elemental observations of basic science and pathophysiologic clinical mechanisms-in particular, those associated with cardiopulmonary and circulatory disorders. Data indicate that cardiomegaly results from increased work caused by the anemia and that myocardial ischemia may result from the combined effects of severe anemia, microthrombi, and increased blood viscosity producing myocardial dysfunction, scarring, and elevated filling pressures. Sudden death has resulted from frank myocardial infarction and ischemia-induced rhythm disturbances. Myocardial injury may also be associated with bone marrow embolism. Mortality risk factors include systemic hypertension, pulmonary hypertension, and possibly subclinical electrical instability.
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Affiliation(s)
- L Julian Haywood
- Department of Medicine (Cardiology), Los Angeles County+University of Southern California Medical Center, CA 90033, USA.
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Prengler M, Pavlakis SG, Prohovnik I, Adams RJ. Sickle cell disease: the neurological complications. Ann Neurol 2002; 51:543-52. [PMID: 12112099 DOI: 10.1002/ana.10192] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The genetic cause of sickle cell disease has been known for decades, yet the reasons for its clinical variability are not fully understood. The neurological complications result from one point mutation that causes vasculopathy of both large and small vessels. Anemia and the resultant cerebral hyperemia produce conditions of hemodynamic insufficiency. Sickled cells adhere to the endothelium, contributing to a cascade of activated inflammatory cells and clotting factors, which result in a nidus for thrombus formation. Because the cerebrovascular reserve becomes exhausted, the capacity for compensatory cerebral mechanisms is severely limited. There is evidence of small-vessel sludging, and a relative deficiency of nitric oxide in these vessels further reduces compensatory vasodilatation. Both clinical strokes and silent infarcts occur, affecting motor and cognitive function. New data suggest that, in addition to sickle cell disease, other factors, both environmental (eg, hypoxia and inflammation) and genetic (eg, mutations resulting in thrombogenesis), may contribute to a patient's stroke risk. The stroke risk is polygenic, and sickle cell disease can be considered a model for all cerebrovascular disease. This complex disease underscores the potential intellectual and practical distance between the determination of molecular genetics and effective clinical application and therapeutics.
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Affiliation(s)
- Mara Prengler
- Neurosciences Unit, Institute of Child Health, University College and Great Ormond Street Hospital for Children NHS Trust, London, United Kingdom
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15
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Abstract
Patients with sickle cell disease usually have mild hypoxaemia and their oxyhaemoglobin dissociation curve is shifted to the right. It follows that oxygen saturation in sickle cell disease should be lower than normal. Most subjects in this clinic had normal oxygen saturation by pulse oximetry, however. To improve the understanding of this paradox, arterialised capillary oxygen tension (PO2) and oxygen saturation were compared with simultaneously measured pulse oximeter saturation in 20 children with sickle cell disease. In addition, the PO2 at 50% haemoglobin saturation (P50) was compared with saturation measured by pulse oximetry in all 20 patients. It was found that saturation measured by pulse oximetry was, on the whole, similar to that calculated from the sampled blood. Individual deviations were not random, however, and were partly explained by differences in P50 values. It is concluded that pulse oximetry gives variable results in patients with sickle cell disease and should be used with caution to predict arterial saturation in this patient group.
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Affiliation(s)
- P Pianosi
- Respiratory Medicine Service, McGill University-Montreal Children's Hospital Research Institute, Winnipeg, Manitoba, Canada
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16
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Weissman C, Kemper M. Stressing the critically ill patient: the cardiopulmonary and metabolic responses to an acute increase in oxygen consumption. J Crit Care 1993; 8:100-8. [PMID: 8343862 DOI: 10.1016/0883-9441(93)90014-c] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Critically ill patients frequently have compromised respiratory and hemodynamic function. Chest physical therapy has been previously shown to increase oxygen demand and therefore was used to examine how postoperative mechanically ventilated patients responded to an increased oxygen demand. We found that during chest physical therapy, oxygen consumption increased 52% +/- 37% (SD) over baseline values. There was a 35% +/- 32% increase in oxygen extraction and a 17% +/- 33% increase in oxygen delivery. Arterial and pulmonary artery pressures also increased. The cardiac output increase was due to increased heart rate with no change in stroke volume. The increases in minute ventilation and alveolar ventilation were not sufficient to eliminate the greater quantity of carbon dioxide produced, resulting in a small increase in PaCO2. There was no significant change in systemic vascular resistance. The increase in oxygen demand caused by chest physical therapy triggered an integrated physiological response that resulted in increased respiratory and cardiac performance. This in some ways, such as the lack of increase in systemic vascular resistance, resembles the response to exercise.
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Affiliation(s)
- C Weissman
- Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032
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