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Ait Ali L, Martini N, Listo E, Valenti E, Sotelo J, Salvadori S, Passino C, Monteleone A, Stagnaro N, Trocchio G, Marrone C, Raimondi F, Catapano G, Festa P. Impact of 4D-Flow CMR Parameters on Functional Evaluation of Fontan Circulation. Pediatr Cardiol 2024; 45:998-1006. [PMID: 38519622 PMCID: PMC11056328 DOI: 10.1007/s00246-024-03446-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/06/2024] [Indexed: 03/25/2024]
Abstract
We sought to evaluate the potential clinical role of 4D-flow cardiac magnetic resonance (CMR)-derived energetics and flow parameters in a cohort of patients' post-Fontan palliation. In patients with Fontan circulation who underwent 4D-Flow CMR, streamlines distribution was evaluated, as well a 4D-flow CMR-derived energetics parameters as kinetic energy (KE) and energy loss (EL) normalized by volume. EL/KE index as a marker of flow efficiency was also calculated. Cardiopulmonary exercise test (CPET) was also performed in a subgroup of patients. The population study included 55 patients (mean age 22 ± 11 years). The analysis of the streamlines revealed a preferential distribution of the right superior vena cava flow for the right pulmonary artery (62.5 ± 35.4%) and a mild preferential flow for the left pulmonary artery (52.3 ± 40.6%) of the inferior vena cave-pulmonary arteries (IVC-PA) conduit. Patients with heart failure (HF) presented lower IVC/PA-conduit flow (0.75 ± 0.5 vs 1.3 ± 0.5 l/min/m2, p = 0.004) and a higher mean flow-jet angle of the IVC-PA conduit (39.2 ± 22.8 vs 15.2 ± 8.9, p < 0.001) than the remaining patients. EL/KE index correlates inversely with VO2/kg/min: R: - 0.45, p = 0.01 peak, minute ventilation (VE) R: - 0.466, p < 0.01, maximal voluntary ventilation: R:0.44, p = 0.001 and positively with the physiological dead space to the tidal volume ratio (VD/VT) peak: R: 0.58, p < 0.01. From our data, lower blood flow in IVC/PA conduit and eccentric flow was associated with HF whereas higher EL/KE index was associated with reduced functional capacity and impaired lung function. Larger studies are needed to confirm our results and to further improve the prognostic role of the 4D-Flow CMR in this challenging population.
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Affiliation(s)
- Lamia Ait Ali
- Institute of Clinical Physiology, National Research Council, Via Aurelia Sud, 54100, Massa, Pisa, Italy.
- Gabriele Monasterio Foundation, Pisa, Massa, Italy.
| | | | - Elisa Listo
- Azienda Ospedaliera ASL, 3-Ospedale Villascassi, Genoa, Italy
| | - Elisa Valenti
- Institute of Clinical Physiology, National Research Council, Via Aurelia Sud, 54100, Massa, Pisa, Italy
| | - Julio Sotelo
- Departamento de Informática, Universidad Técnica Federico Santa María, Santiago, Chile
| | - Stefano Salvadori
- Institute of Clinical Physiology, National Research Council, Via Aurelia Sud, 54100, Massa, Pisa, Italy
| | | | | | | | - Gianluca Trocchio
- ASST Ospedale Papa Giovanni XXIII, Piazza OMS, 1, 24127, Bergamo BG, Bergamo, Italy
| | | | - Francesca Raimondi
- ASST Ospedale Papa Giovanni XXIII, Piazza OMS, 1, 24127, Bergamo BG, Bergamo, Italy.
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Lagerstrand K, Nyström A, Svensson PA, De Lange C, Dangardt F. Accurate quantification of pulmonary perfusion ratio in children with congenital heart disease using partial volume corrected 4D flow cardiac magnetic resonance. Front Pediatr 2024; 12:1339679. [PMID: 38818350 PMCID: PMC11137306 DOI: 10.3389/fped.2024.1339679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 04/30/2024] [Indexed: 06/01/2024] Open
Abstract
Background In children with congenital heart disease (CHD), lung scintigraphy is the reference standard for evaluation of pulmonary perfusion. 4D flow CMR offers a non-ionizing alternative. Due to the intrinsic limitation in the spatial resolution, however, 4D flow may display clinically unacceptable differences compared to the reference standard. This case study aims to highlight the importance of correcting for such partial volume errors to accurately evaluate pulmonary perfusion in small pulmonary arteries. Methods Children with CHD, mainly those with transposition of the great arteries or tetralogy-of-Fallot, referred to CMR from 2020 to 2022 at our clinic, were retrospectively reviewed; n = 37. All patients had been examined with a free breathing, motion-corrected 4D flow protocol. Comparison in pulmonary perfusion (PPR: relative flow through right and left pulmonary arteries) with scintigraphy were performed both for 4D flow before and after partial volume correction. Results Patients with large pulmonary arteries, 76%, displayed small differences in PPR between modalities (<20%), while patients with arteries of only a few pixels, 24%, displayed differences up to 178%, depending on the relative difference in size between the right and left pulmonary artery. Differences were effectively reduced after partial volume correction (<21%). Conclusion The present report shows that 4D flow is a promising tool to accurately evaluate the pulmonary perfusion in children with CHD, but that partial volume correction is warranted to overcome its limitation in the spatial resolution. Without such correction, lung scintigraphy is still recommended to ensure high diagnostic certainty in children with small pulmonary arteries.
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Affiliation(s)
- Kerstin Lagerstrand
- Department of Medical Physics and Biomedical Engineering, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
- Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Nyström
- Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Pediatric Radiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Pär-Arne Svensson
- Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Pediatric Radiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Charlotte De Lange
- Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Pediatric Radiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Frida Dangardt
- Children's Heart Center, The Queen Silvia Children's Hospital, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
- Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Edelson JB, Zak V, Goldberg D, Fleming G, Mackie AS, Patel JK, Files M, Downing T, Richmond M, Acheampong B, Cartoski M, Detterich J, McCrindle B, McHugh K, Hansen JE, Wagner J, Maria MD, Weingarten A, Nowlen T, Yoon JK, Kim GB, Williams R, Whitehill R, Kirkpatrick E, Yin S, Ermis P, Lubert AM, Stylianou M, Freemon D, Hu C, Garuba OD, Frommelt P, Goldstein BH, Paridon S, Garg R. The Effect of Udenafil on Heart Rate and Blood Pressure in Adolescents With the Fontan Circulation. Am J Cardiol 2024; 210:183-187. [PMID: 37918818 PMCID: PMC10872492 DOI: 10.1016/j.amjcard.2023.09.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/26/2023] [Accepted: 09/30/2023] [Indexed: 11/04/2023]
Abstract
The Fontan Udenafil Exercise Longitudinal (FUEL) trial showed that treatment with udenafil was associated with improved exercise performance at the ventilatory anaerobic threshold in children with Fontan physiology. However, it is not known how the initiation of phosphodiesterase 5 inhibitor therapy affects heart rate and blood pressure in this population. These data may help inform patient selection and monitoring after the initiation of udenafil therapy. The purpose of this study is to evaluate the effects of udenafil on vital signs in the cohort of patients enrolled in the FUEL trial. This international, multicenter, randomized, double-blind, placebo-controlled trial of udenafil included adolescents with single ventricle congenital heart disease who had undergone Fontan palliation. Changes in vital signs (heart rate [HR], systolic [SBP] and diastolic blood pressure [DBP]) were compared both to subject baseline and between the treatment and the placebo groups. Additional exploratory analyses were performed to evaluate changes in vital signs for prespecified subpopulations believed to be most sensitive to udenafil initiation. Baseline characteristics were similar between the treatment and placebo cohorts (n = 200 for each). The groups demonstrated a decrease in HR, SBP, and DBP 2 hours after drug/placebo administration, except SBP in the placebo group. There was an increase in SBP from baseline to after 6-min walk test in the treatment and placebo groups, and the treatment group showed an increase in HR (87.4 ± 15.0 to 93.1 ± 19.4 beats/min, p <0.01) after exercise. When comparing changes from baseline to the 26-week study visit, small decreases in both SBP (-1.9 ± 12.3 mm Hg, p = 0.03) and DBP (-3.0 ± 9.6 mm Hg, p <0.01) were seen in the treatment group. There were no clinically significant differences between treatment and placebo group in change in HR or blood pressure in the youngest age quartile, lightest weight quartile, or those on afterload-reducing agents. In conclusion, initiation of treatment with udenafil in patients with Fontan circulation was not associated with clinically significant changes in vital signs, implying that for patients similar to those enrolled in the FUEL trial, udenafil can be started without the requirement for additional monitoring after initial administration.
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Affiliation(s)
- Jonathan B Edelson
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, Pennsylvania.
| | | | - David Goldberg
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Greg Fleming
- Duke Children's Pediatric and Congenital Heart Center, Durham, North Carolina
| | - Andrew S Mackie
- Division of Cardiology, Stollery Children's Hospital, Edmonton, Alberta, California
| | - Jyoti K Patel
- Division of Cardiology, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana
| | - Matthew Files
- Division of Pediatric Cardiology, University of Washington School of Medicine, Seattle Children's Hospital, Seattle, Washington
| | - Tacy Downing
- Division of Cardiology, Children's National Hospital, Washington, District of Columbia
| | - Marc Richmond
- Division of Pediatric Cardiology, Morgan Stanley Children's Hospital, Columbia University Medical Center, New York, New York
| | - Ben Acheampong
- Children's Hospital and Medical Center, University of Nebraska, Omaha, Nebraska
| | - Mark Cartoski
- Nemours Cardiac Center, Nemours / Alfred I. DuPont Hospital for Children, Wilmington, Delaware
| | - Jon Detterich
- Division of Cardiology, Children's Hospital Los Angeles, Los Angeles, California
| | - Brian McCrindle
- Department of Pediatrics, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Kimberly McHugh
- Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Jesse E Hansen
- Division of Cardiology, C.S. Mott Children's Hospital, University of Michigan, Ann Arbor, Michigan
| | - Jonathan Wagner
- Ward Family Heart Center, Children's Mercy Kansas City, Kansas City, Missouri; Division of Clinical Pharmacology, Children's Mercy Kansas City, Kansas City, Missouri
| | - Michael Di Maria
- Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado
| | - Angela Weingarten
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Todd Nowlen
- Heart Center, Phoenix Children's Hospital, Phoenix, Arizona
| | - Ja Kyoung Yoon
- Department of Pediatrics, Sejong General Hospital, Bucheon, South Korea
| | - Gi Beom Kim
- Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, South Korea
| | - Richard Williams
- Division of Pediatric Cardiology, University of Utah, Primary Children's Hospital, Salt Lake City, Utah
| | - Robert Whitehill
- Emory University, School of Medicine, Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Edward Kirkpatrick
- Division of Pediatric Cardiology, Medical College of Wisconsin, Children's Hospital of Wisconsin, Milwaukee, Wisconsin
| | - Suellen Yin
- Department of Cardiology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Peter Ermis
- Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Adam M Lubert
- Cincinnati Children's Hospital Heart Institute, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Mario Stylianou
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood, Institute, National Institutes of Health, Bethesda, Maryland
| | - D'Andrea Freemon
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood, Institute, National Institutes of Health, Bethesda, Maryland
| | | | - Olukayode D Garuba
- Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Peter Frommelt
- Division of Pediatric Cardiology, Medical College of Wisconsin, Children's Hospital of Wisconsin, Milwaukee, Wisconsin
| | - Bryan H Goldstein
- Division of Cardiology, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Stephen Paridon
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Ruchira Garg
- Departments of Cardiology and Pediatrics, Cedars-Sinai Guerin Children's and Smidt Heart Institute, Los Angeles, California
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Venna A, Deshpande S, Downing T, John A, d'Udekem Y. Are dynamic measurements of central venous pressure in Fontan circulation during exercise or volume loading superior to resting measurements? Cardiol Young 2023:1-12. [PMID: 37981897 DOI: 10.1017/s1047951123003797] [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] [Indexed: 11/21/2023]
Abstract
BACKGROUND The main objective measure to assess the health of the Fontan circulation is the pressure measurement of the superior vena cava or pulmonary arteries. We reviewed the literature for benefits of measuring resting pressure in the Fontan circuit and explored whether dynamic measurement by volume loading or exercise has the potential to refine this diagnostic tool. METHODS PubMed was searched for articles showing a relationship between resting post-operative central venous pressure or pulmonary artery pressure and Fontan failure. Relationships between post-operative central venous pressure or pulmonary artery pressure and volume loading changes, such as during exercise or volume loading during cardiac catheterization, were also queried. RESULTS A total of 44 articles mentioned relationships between resting central venous pressure or pulmonary artery pressure and Fontan failure. Only 26 included an analysis between the variables and only seven of those articles found pressure to be predictive of Fontan failure. Ten articles examined the relationship between exercise or volume loading and outcomes and demonstrated a large individual variation of pressures under these dynamic conditions. CONCLUSIONS Based on current literature, there is not a lot of strong evidence to show that elevated resting central venous pressure or pulmonary artery pressure is predictive of Fontan failure. Some individuals experience dramatic increases in central venous pressure or pulmonary artery pressure under increased loading conditions with exercise or bolus fluid infusion, while others experience increases closer to that of a healthy control population. Further studies are needed to examine whether more dynamic and continuous monitoring of systemic venous pressures might better predict outcomes in patients with Fontan circulation.
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Affiliation(s)
- Alyssia Venna
- Division of Cardiac Surgery, Children's National Hospital, Washington, DC, USA
| | | | - Tacy Downing
- Division of Cardiology, Children's National Health System, Washington, DC, USA
| | - Anitha John
- Division of Cardiology, Children's National Health System, Washington, DC, USA
| | - Yves d'Udekem
- Division of Cardiac Surgery, Children's National Hospital, Washington, DC, USA
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Aly S, Mertens L, Friedberg MK, Dragulescu A. Longitudinal Changes in Ventricular Mechanics in Adolescents After the Fontan Operation. J Am Soc Echocardiogr 2023; 36:998-1007. [PMID: 37236378 DOI: 10.1016/j.echo.2023.04.021] [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: 11/12/2022] [Revised: 04/19/2023] [Accepted: 04/24/2023] [Indexed: 05/28/2023]
Abstract
BACKGROUND Ventricular dysfunction is a significant clinical challenge in the long-term follow-up of patients with single-ventricle (SV) physiology. Ventricular function and myocardial mechanics can be studied using speckle-tracking echocardiography, which provides information on myocardial deformation. Limited information is available on serial changes in SV myocardial mechanics after the Fontan operation. The aim of this study was to describe serial changes in myocardial mechanics in children after the Fontan operation and the relationship of these changes with myocardial fibrosis markers as obtained by cardiac magnetic resonance and exercise performance parameters. METHODS The authors hypothesized that ventricular mechanics decline in patients with SVs over time and are associated with increased myocardial fibrosis and reduced exercise performance. A single-center retrospective cohort study including adolescents after the Fontan operation was conducted. Ventricular strain and torsion were assessed using speckle-tracking echocardiography. Cardiac magnetic resonance and cardiopulmonary exercise testing data closest to the latest echocardiographic examinations were performed. The most recent follow-up echocardiographic and cardiac magnetic resonance data were compared with those from sex- and age-matched control subjects and with individual patients' early post-Fontan data. RESULTS Fifty patients with SVs (31 left ventricle, 13 right ventricle [RV], and six codominant) were included. Median time at follow-up echocardiography from the time of Fontan was 12.8 years (interquartile range [IQR], 10.6 to 16.6 years). Compared with early post-Fontan echocardiography, follow-up assessment showed reduced global longitudinal strain (-17.5% [IQR, -14.5% to -19.5%] vs -19.8% [IQR, -16.0% to -21.7%], P = .01], circumferential strain (-15.7% [IQR, -11.4% to -18.7%] vs -18.9% [IQR, -15.2% to -25.0%], P = .009), and torsion (1.28°/cm [IQR, 0.51°/cm to 1.74°/cm] vs 1.72°/cm [IQR, 0.92°/cm to 2.34°/cm], P = .02), with decreased apical rotation but no significant change in basal rotation. Single RVs had lower torsion compared with single left ventricles (1.04°/cm [IQR, 0.12°/cm to 2.20°/cm] vs 1.25°/cm [IQR, 0.25°/cm to 2.51°/cm], P = .01). T1 values were higher in patients with SV compared with control subjects (1,009 ± 36 vs 958 ± 40 msec, P = .004) and in those with single RVs compared with single left ventricles (1,023 ± 19 vs 1,006 ± 17 msec, P = .02). T1 was correlated with circumferential strain (r = 0.59, P = .04) and inversely correlated with O2 saturation (r = -0.67, P < .001) and torsion (r = -0.71, P = .02). Peak oxygen consumption was correlated with torsion (r = 0.52, P = .001) and untwist rates (r = 0.23, P = .03). CONCLUSIONS After the Fontan procedures, there is a progressive decrease in myocardial deformation parameters. The progressive decrease in SV torsion is related to a decrease in apical rotation, which is more pronounced in single RVs. Decreased torsion is associated with increased markers of myocardial fibrosis and lower maximal exercise capacity. Torsional mechanics may be an important parameter to monitor after Fontan palliation, but further prognostic information is required.
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Affiliation(s)
- Safwat Aly
- Division of Cardiology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada; Division of Cardiac Imaging, Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts.
| | - Luc Mertens
- Division of Cardiology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Mark K Friedberg
- Division of Cardiology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Andreea Dragulescu
- Division of Cardiology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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Ishida H, Maeda J, Uchida K, Yamagishi H. Unique Pulmonary Hypertensive Vascular Diseases Associated with Heart and Lung Developmental Defects. J Cardiovasc Dev Dis 2023; 10:333. [PMID: 37623346 PMCID: PMC10455332 DOI: 10.3390/jcdd10080333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/10/2023] [Accepted: 08/01/2023] [Indexed: 08/26/2023] Open
Abstract
Although pediatric pulmonary hypertension (PH) shares features and mechanisms with adult PH, there are also some significant differences between the two conditions. Segmental PH is a unique pediatric subtype of PH with unclear and/or multifactorial pathophysiological mechanisms, and is often associated with complex congenital heart disease (CHD), pulmonary atresia with ventricular septal defect, and aortopulmonary collateral arteries. Some cases of complex CHD, associated with a single ventricle after Fontan operation, show pathological changes in the small peripheral pulmonary arteries and pulmonary vascular resistance similar to those observed in pulmonary arterial hypertension (PAH). This condition is termed as the pediatric pulmonary hypertensive vascular disease (PPHVD). Recent advances in genetics have identified the genes responsible for PAH associated with developmental defects of the heart and lungs, such as TBX4 and SOX17. Targeted therapies for PAH have been developed; however, their effects on PH associated with developmental heart and lung defects remain to be established. Real-world data analyses on the anatomy, pathophysiology, genetics, and molecular biology of unique PPHVD cases associated with developmental defects of the heart and lungs, using nationwide and/or international registries, should be conducted in order to improve the treatments and prognosis of patients with these types of pediatric PH.
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Affiliation(s)
- Hidekazu Ishida
- Department of Pediatrics, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita 565-0871, Osaka, Japan;
| | - Jun Maeda
- Department of Cardiology, Tokyo Metropolitan Children’s Medical Center, 2-8-29 Musashidai, Fuchu 183-8561, Tokyo, Japan;
| | - Keiko Uchida
- Department of Pediatrics, Keio University of Medicine, 35 Shinanomachi, Shinjuku-ku 160-8582, Tokyo, Japan;
- Keio University Health Center, 4-1-1 Hiyoshi, Kohoku-ku, Yokohama 223-8521, Kanagawa, Japan
| | - Hiroyuki Yamagishi
- Department of Pediatrics, Keio University of Medicine, 35 Shinanomachi, Shinjuku-ku 160-8582, Tokyo, Japan;
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Goudar S, Forsha D, White DA, Sherman A, Shirali G. Single ventricular strain measures correlate with peak oxygen consumption in children and adolescents with Fontan circulation. Cardiol Young 2023; 33:1136-1142. [PMID: 35864813 DOI: 10.1017/s1047951122002323] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Children with a single ventricle post-Fontan palliation are at increased risk of poor outcomes with peak oxygen consumption acting as a surrogate outcome marker. The purpose of this study is to evaluate the relationship between peak oxygen consumption and echocardiographic measures of ventricular function and deformation, including ventricular global longitudinal strain and dyssynchrony, in children and adolescents following Fontan palliation. METHODS Patients (age 8-21 years) with single ventricle post-Fontan palliation were prospectively recruited and participated in an echocardiogram, including views optimised for two-dimensional speckle tracking, and a cardiopulmonary exercise test on a cycle ergometer to maximal volitional fatigue. RESULTS Thirty-eight patients (mean age 13.7 ± 2.3 years) post-Fontan palliation had either a single left ventricular (n = 20), single right ventricular (n = 14), or biventricular (n = 4) morphology. Peak oxygen consumption (24.9 ± 5.6 ml/kg/minute) was correlated with global longitudinal strain (r = -0.435, p = 0.007), a strain discoordination time to peak index (r = -0.48, p = 0.003), and the presence of an electro-mechanical dyssynchrony strain pattern (p = 0.008). On multivariate regression modelling, these three variables were associated with peak oxygen consumption independently of age and sex. The single right ventricular group had evidence of possible diastolic dysfunction by E/e' compared to the single left ventricular and biventricular groups (p = 0.001). CONCLUSIONS Strain analysis measures are correlated with peak oxygen consumption in this cohort of children, adolescents, and young adults following Fontan palliation, suggesting that ventricular mechanics may influence the efficiency of the Fontan circulation.
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Affiliation(s)
- Suma Goudar
- Children's National Heart Institute, Department of Pediatrics, Washington, DC, USA
| | - Daniel Forsha
- Children's Mercy Hospital, Ward Family Heart Center, Department of Pediatrics, Kansas City, MO, USA
- University of Missouri-Kansas City, Department of Pediatrics, Kansas City, MO, USA
| | - David A White
- Children's Mercy Hospital, Ward Family Heart Center, Department of Pediatrics, Kansas City, MO, USA
- University of Missouri-Kansas City, Department of Pediatrics, Kansas City, MO, USA
| | - Ashley Sherman
- Children's Mercy Hospital, Department of Biostatistics, Kansas City, MO, USA
| | - Girish Shirali
- Children's Mercy Hospital, Ward Family Heart Center, Department of Pediatrics, Kansas City, MO, USA
- University of Missouri-Kansas City, Department of Pediatrics, Kansas City, MO, USA
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Mahendran AK, Katz D, Opotowsky AR, Lubert AM. Exercise Pathophysiology and Testing in Individuals With a Fontan Circulation. CJC PEDIATRIC AND CONGENITAL HEART DISEASE 2023; 2:112-123. [PMID: 37969357 PMCID: PMC10642126 DOI: 10.1016/j.cjcpc.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/07/2023] [Indexed: 11/17/2023]
Abstract
The Fontan circulation, a surgical palliation for single-ventricle congenital heart disease, profoundly impacts the cardiopulmonary response to exercise. Reliant on passive pulmonary blood flow, the Fontan circulation has limited capacity to augment cardiac output as necessary to supply working muscles during exercise. Cardiopulmonary exercise testing (CPET) objectively assesses cardiorespiratory fitness and provides insight into the etiology of exercise intolerance. Furthermore, CPET variables, such as peak oxygen consumption and submaximal variables, have prognostic value and may be used as meaningful endpoints in research studies. CPET is also useful in clinical research applications to assess the effect of pharmacologic or other interventions. Medical therapies to improve exercise tolerance in individuals with a Fontan circulation, such as pulmonary vasodilators, may modestly improve peak oxygen consumption. Exercise training focused on aerobic fitness and lower extremity strength may have a more consistent and larger impact on these measures of aerobic fitness. CPET is a valuable diagnostic and prognostic tool for those with a Fontan circulation. Newer ancillary assessments, such as noninvasive peripheral venous pressure monitoring and cardiac output measurements, hold promise to provide a more nuanced insight into the underlying pathophysiology.
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Affiliation(s)
- Arjun K. Mahendran
- Department of Pediatrics, Heart Institute, Cincinnati Children’s Hospital, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - David Katz
- Department of Pediatrics, Heart Institute, Cincinnati Children’s Hospital, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Alexander R. Opotowsky
- Department of Pediatrics, Heart Institute, Cincinnati Children’s Hospital, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Adam M. Lubert
- Department of Pediatrics, Heart Institute, Cincinnati Children’s Hospital, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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Peck D, Averin K, Khoury P, Veldhuis G, Alsaied T, Lubert AM, Hirsch R, Whiteside WM, Veldtman G, Goldstein BH. Occult Diastolic Dysfunction and Adverse Clinical Outcomes in Adolescents and Young Adults With Fontan Circulation. J Am Heart Assoc 2022; 12:e026508. [PMID: 36565206 PMCID: PMC9973593 DOI: 10.1161/jaha.122.026508] [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] [Indexed: 12/25/2022]
Abstract
Background In Fontan circulation, diastolic dysfunction portends a worse clinical outcome but may be concealed during routine assessment. Invasive evaluation with rapid volume expansion (RVE) can identify patients with occult diastolic dysfunction (ODD). We sought to evaluate the association between ODD and adverse clinical outcomes at medium-term follow-up. Methods and Results We conducted a single-center observational study of patients with Fontan circulation who underwent clinical catheterization with RVE from 2012 to 2017. ODD was defined as post-RVE end-diastolic pressure ≥15 mm Hg. A composite adverse clinical outcome included mortality, cardiac transplant, ventricular assist device, plastic bronchitis, protein-losing enteropathy, arrhythmia, stroke/thrombus, or cardiac-related hospital admission. Proportional hazards regression was used to compare the ODD-positive and ODD-negative groups for risk of the composite adverse clinical outcome. Eighty-nine patients with Fontan circulation (47% female patients) were included at a median age of 14 years. ODD was identified in 31%. Fontan duration was longer in the ODD group (P=0.001). The composite adverse clinical outcome occurred more frequently in the ODD group (52 versus 26%, P=0.03) during a median follow-up duration of 2.9 years after catheterization. ODD (hazard ratio [HR], 2.68 [95% CI, 1.28-5.66]; P=0.02) and Fontan duration (HR, 1.07 [95% CI, 1.02-1.12]; P=0.003) were associated with the composite adverse clinical outcome. When stratified by Fontan duration, ODD remained significantly associated with the hazard of adverse clinical outcomes in patients with a Fontan duration ≥10 years (HR, 2.57 [95% CI, 1.03-6.57]; P=0.04). Conclusions Cardiac catheterization with rapid volume expansion reveals a significant incidence of ODD, which relates to Fontan duration. ODD is associated with an increased hazard of adverse clinical outcomes during medium-term follow-up, especially in patients with longer Fontan duration. ODD may portend a worse prognosis in Fontan circulation.
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Affiliation(s)
- Daniel Peck
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH
| | - Konstantin Averin
- Division of Cardiology, Department of PediatricsUniversity of AlbertaEdmontonAB
| | - Philip Khoury
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH
| | - Grant Veldhuis
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH
| | - Tarek Alsaied
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH,Heart Institute, UPMC Children’s Hospital of PittsburghDepartment of PediatricsUniversity of Pittsburgh School of MedicinePittsburghPA
| | - Adam M. Lubert
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH
| | - Russel Hirsch
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH
| | | | - Gruschen Veldtman
- Heart Center, King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Bryan H. Goldstein
- The Heart Institute, Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH,Heart Institute, UPMC Children’s Hospital of PittsburghDepartment of PediatricsUniversity of Pittsburgh School of MedicinePittsburghPA
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10
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Di Maria MV, Goldberg DJ, Zak V, Hu C, Lubert AM, Dragulescu A, Mackie AS, McCrary A, Weingarten A, Parthiban A, Goot B, Goldstein BH, Taylor C, Lindblade C, Petit C, Spurney C, Harrild D, Urbina EM, Schuchardt E, Kim GB, Yoon JK, Colombo JN, Files M, Schoessling M, Ermis P, Wong P, Garg R, Swanson S, Menon S, Srivastava S, Thorsson T, Johnson TR, Krishnan US, Paridon SM, Frommelt PC. Impact of Udenafil on Echocardiographic Indices of Single Ventricle Size and Function in FUEL Study Participants. Circ Cardiovasc Imaging 2022; 15:e013676. [PMID: 36378780 PMCID: PMC9674374 DOI: 10.1161/circimaging.121.013676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 10/11/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND The FUEL trial (Fontan Udenafil Exercise Longitudinal) demonstrated statistical improvements in exercise capacity following 6 months of treatment with udenafil (87.5 mg po BID). The effect of udenafil on echocardiographic measures of single ventricle function in this cohort has not been studied. METHODS The 400 enrolled participants were randomized 1:1 to udenafil or placebo. Protocol echocardiograms were obtained at baseline and 26 weeks after initiation of udenafil/placebo. Linear regression compared change from baseline indices of single ventricle systolic, diastolic and global function, atrioventricular valve regurgitation, and mean Fontan fenestration gradient in the udenafil cohort versus placebo, controlling for ventricular morphology (left ventricle versus right ventricle/other) and baseline value. RESULTS The udenafil participants (n=191) had significantly improved between baseline and 26 weeks visits compared to placebo participants (n=195) in myocardial performance index (P=0.03, adjusted mean difference [SE] of changes between groups -0.03[0.01]), atrioventricular valve inflow peak E (P=0.009, 3.95 [1.50]), and A velocities (P=0.034, 3.46 [1.62]), and annular Doppler tissue imaging-derived peak e' velocity (P=0.008, 0.60[0.23]). There were no significant differences in change in single ventricle size, systolic function, atrioventricular valve regurgitation severity, or mean fenestration gradient. Participants with a dominant left ventricle had significantly more favorable baseline values of indices of single ventricle size and function (lower volumes and areas, E/e' ratio, systolic:diastolic time and atrioventricular valve regurgitation, and higher annular s' and e' velocity). CONCLUSIONS FUEL participants who received udenafil demonstrated a statistically significant improvement in some global and diastolic echo indices. Although small, the changes in diastolic function suggest improvement in pulmonary venous return and/or augmented ventricular compliance, which may help explain improved exercise performance in that cohort. REGISTRATION URL: https://clinicaltrials.gov; Unique Identifier: NCT02741115.
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Affiliation(s)
- Michael V. Di Maria
- Children’s Hospital Colorado, University of Colorado School of Medicine, Aurora, CO
| | - David J. Goldberg
- Children’s Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA
| | | | | | - Adam M. Lubert
- Cincinnati Children’s Hospital, Heart Institute, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | | | - Andrew S. Mackie
- Stollery Children’s Hospital, University of Alberta, Edmonton, Alberta, Canana
| | | | | | - Anitha Parthiban
- Texas Children’s Hospital, Baylor College of Medicine, Houston, TX
| | - Benjamin Goot
- Children’s Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI
| | - Bryan H. Goldstein
- Cincinnati Children’s Hospital, Heart Institute, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
- UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA
| | - Carolyn Taylor
- Shawn Jenkins Children’s Hospital, Medical University of South Carolina, Charleston, SC
| | | | - Christopher Petit
- Children’s Heart Center, Emory University School of Medicine, Atlanta, GA
| | | | | | - Elaine M. Urbina
- Cincinnati Children’s Hospital, Heart Institute, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Eleanor Schuchardt
- Rady Children’s Hospital, University of California San Diego, San Diego, CA
| | - Gi Beom Kim
- Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Ja Kyoung Yoon
- Sejong Hospital Cardiovascular Center, Department of Pediatrics, Bucheon, South Korea
| | - Jamie N. Colombo
- St. Louis Children’s Hospital, Washington University School of Medicine, St. Louis, MO
| | - Matthew Files
- Seattle Children’s Hospital, University of Washington, Seattle, WA
| | - Megan Schoessling
- Children’s Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI
| | - Peter Ermis
- Texas Children’s Hospital, Baylor College of Medicine, Houston, TX
| | - Pierre Wong
- Children’s Hospital of Los Angeles, Keck School of Medicine of USC, Los Angeles, CA
| | - Ruchira Garg
- Smidt Heart Institute, Cedars-Sinai, Los Angeles, CA
| | - Sara Swanson
- Children’s Hospital and Medical Center, Omaha, NE
| | - Shaji Menon
- Primary Children’s Hospital, University of Utah, Salt Lake City, UT
| | | | - Thor Thorsson
- C.S. Mott Children’s Hospital, University of Michigan Congenital Heart Center, Ann Arbor, MI
| | | | - Usha S. Krishnan
- Columbia University Irving Medical Center, Morgan Stanley Children’s Hospital of New York, New York, NY
| | - Stephen M Paridon
- Children’s Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - Peter C. Frommelt
- Children’s Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI
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11
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Improved Exercise Tolerance in an Adolescent Female After Failed Fontan and Subsequent Biventricular Conversion. Pediatr Cardiol 2022; 43:1669-1673. [PMID: 35678825 DOI: 10.1007/s00246-022-02931-y] [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: 02/20/2022] [Accepted: 04/28/2022] [Indexed: 10/18/2022]
Abstract
We report a case of improved exercise tolerance in a single-ventricle patient following biventricular conversion. An 11 year old with a fenestrated extracardiac failing Fontan was accepted for a biventricular conversion repair at an out-of-town institution. The patient had multiple adverse cardiac events following Fontan surgery including recurrent pleural effusions, arteriovenous malformations, protein-losing enteropathy, and marked exercise intolerance. Serial cardiac catheterizations revealed chronic elevated pulmonary artery and Fontan pressures, normal left ventricular end-diastolic pressure and an adequately sized left ventricle. Cardiopulmonary exercise testing demonstrated severely reduced exercise tolerance due to ventilatory and cardiac limitations with significant arterial desaturations during exercise. Following a successful biventricular conversion, exercise tolerance improved remarkably, as evidenced by improved oxygen uptake and ventilatory efficiency. Our case demonstrates that biventricular conversion surgery may offer improvement in quality of life and exercise capacity in selected patients with failing Fontan physiology.
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12
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Invasive Hemodynamic Evaluation of the Fontan Circulation: Current Day Practice and Limitations. Curr Cardiol Rep 2022; 24:587-596. [PMID: 35230616 DOI: 10.1007/s11886-022-01679-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/03/2022] [Indexed: 12/29/2022]
Abstract
PURPOSE OF REVIEW Establishing the Fontan circulation has led to improved survival in patients born with complex congenital heart diseases. Despite early success, the long-term course of Fontan patients is complicated by multi-organ dysfunction, mainly due to a combination of low resting and blunted exercise-augmented cardiac output as well as elevated central venous (Fontan) pressure. Similarly, despite absolute hemodynamic differences compared to the normal population with biventricular circulation, the "normal" ranges of hemodynamic parameters specific to age-appropriate Fontan circulation have not been well defined. With the ever-increasing population of patients requiring Fontan correction, it is of utmost importance that an acceptable range of hemodynamics in this highly complex patient cohort is better defined. RECENT FINDINGS Multiple publications have described hemodynamic limitations and potential management options in patients with Fontan circulation; however, an acceptable range of hemodynamic parameters in this patient population has not been well defined. Identification of "normal" hemodynamic parameters among patients with Fontan circulation will allow physicians to more objectively define indications for intervention, which is a necessary first step to eliminate institutional and regional heterogeneity in Fontan management and potentially improve long-term clinical outcomes.
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13
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Hedlund E, Lundell B. Fontan circulation has improved life expectancy for infants born with complex heart disease over the last 50 years but has also resulted in significant morbidity. Acta Paediatr 2022; 111:11-16. [PMID: 34235784 DOI: 10.1111/apa.16023] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/22/2021] [Accepted: 07/06/2021] [Indexed: 12/17/2022]
Abstract
The prognosis for infants born with complex heart disease improved dramatically with the introduction of the Fontan circulation 50 years ago. With today's carefully designed and staged operations to a Fontan circulation, life expectancy has increased and most children will survive into adult life. The Fontan circulation entails an unphysiological circulation with high risk for multiple organ system dysfunction. Neurodevelopmental disabilities with adverse psychosocial effects are prevalent. The Fontan circulation may eventually fail and necessitate heart transplantation. CONCLUSION: Fifty years development of the Fontan circulation to today's staged surgical procedures has improved survival but also revealed the burden of a high morbidity for a growing number of patients.
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Affiliation(s)
- Eva Hedlund
- Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
| | - Bo Lundell
- Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
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14
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Wan X, Liu C, Olson TP, Chen X, Lu W, Jiang W. Differences in Peak Oxygen Uptake in Bicycle Exercise Test Caused by Body Positions: A Meta-Analysis. Front Cardiovasc Med 2021; 8:734687. [PMID: 34708089 PMCID: PMC8542763 DOI: 10.3389/fcvm.2021.734687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/13/2021] [Indexed: 11/13/2022] Open
Abstract
Background: As demand for cardiopulmonary exercise test using a supine position has increased, so have the testing options. However, it remains uncertain whether the existing evaluation criteria for the upright position are suitable for the supine position. The purpose of this meta-analysis is to compare the differences in peak oxygen uptake (VO2peak) between upright and supine lower extremity bicycle exercise. Methods: We searched PubMed, Web Of Science and Embase from inception to March 27, 2021. Self-control studies comparing VO2peak between upright and supine were included. The quality of the included studies was assessed using a checklist adapted from published papers in this field. The effect of posture on VO2peak was pooled using random/fixed effects model. Results: This meta-analysis included 32 self-control studies, involving 546 participants (63% were male). 21 studies included only healthy people, 9 studies included patients with cardiopulmonary disease, and 2 studies included both the healthy and cardiopulmonary patients. In terms of study quality, most of the studies (n = 21, 66%) describe the exercise protocol, and we judged theVO2peak to be valid in 26 (81%) studies. Meta-analysis showed that the upright VO2peak exceeded the supine VO2peak [relative VO2peak: mean difference (MD) 2.63 ml/kg/min, 95% confidence interval (CI) 1.66-3.59, I 2 = 56%, p < 0.05; absolute VO2peak: MD 0.18 L/min, 95% CI 0.10-0.26, I 2 = 63%, p < 0.05). Moreover, subgroup analysis showed there was more pooled difference in healthy people (4.04 ml/kg/min or 0.22 L/min) than in cardiopulmonary patients (1.03 ml/kg/min or 0.12 L/min). Conclusion: VO2peak in the upright position is higher than that in supine position. However, whether this difference has clinical significance needs further verification. Systematic Review Registration: identifier, CRD42021233468.
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Affiliation(s)
- Xiaohua Wan
- Department of Cardiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China.,The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Chang Liu
- Department of Cardiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China.,The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Thomas P Olson
- Division of Cardiovascular Diseases, Department of Internal Medicine, Mayo Clinic and Foundation, Rochester, MN, United States
| | - Xiankun Chen
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.,Healthy Systems and Policy, Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.,Key Unit of Methodology in Clinical Research, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Weihui Lu
- Department of Cardiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China.,The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wei Jiang
- Department of Cardiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China.,The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine for Prevention and Treatment of Refractory Chronic Diseases, Guangzhou, China
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15
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Becker K, Uebing A, Hansen JH. Pulmonary vascular disease in Fontan circulation-is there a rationale for pulmonary vasodilator therapies? Cardiovasc Diagn Ther 2021; 11:1111-1121. [PMID: 34527537 DOI: 10.21037/cdt-20-431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 06/29/2020] [Indexed: 12/21/2022]
Abstract
The Fontan circulation is a palliative concept for patients with univentricular hearts. The central veins are connected directly to the pulmonary arteries (cavo-pulmonary connection) to separate the pulmonary and the systemic circulation. There is no sub-pulmonary ventricle that generates pressure to drive blood through the pulmonary arteries. Pulmonary blood flow is determined by central venous pressure (CVP) and pulmonary vascular resistance (PVR). The capability of the Fontan circulation to compensate for alterations in PVR is limited, as CVP can only be increased within narrow ranges without adverse clinical consequences. Consequently, systemic ventricular preload and cardiac output are dependent on a healthy lung with low PVR. Failure of the Fontan circulation is relatively common. In addition to ventricular dysfunction, maladaptive pulmonary vascular remodeling resulting in increased pulmonary resistance may play a key role. The pathophysiology of the maladaptive vascular processes remains largely unclear and diagnosis of an increased PVR is challenging in Fontan circulation as accurate measurement of pulmonary arterial blood flow is difficult. In the absence of a sub-pulmonary ventricle, pulmonary artery pressure will almost never reach the threshold conventionally used to define pulmonary arterial hypertension. There is a need for markers of pulmonary vascular disease complementary to invasive hemodynamic data in Fontan patients. In order to treat or prevent failure of the Fontan circulation, pathophysiological considerations support the use of pulmonary vasodilators to augment pulmonary blood flow and systemic ventricular preload and lower CVP. However, to date the available trial data have neither yielded enough evidence to support routine use of pulmonary vasodilators in every Fontan patient nor have they been helpful in defining subgroups of patients that might benefit from such therapies. This review discusses potential pathomechanisms of pulmonary vascular disease; it summarizes the current knowledge of the effects and efficacy of pulmonary vasodilator therapy in Fontan patients and tries to outline areas of potential future research on the diagnosis and treatment of pulmonary vascular disease and Fontan failure.
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Affiliation(s)
- Kolja Becker
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Anselm Uebing
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
| | - Jan Hinnerk Hansen
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
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16
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Stone ML, Schäfer M, DiMaria MV, von Alvensleben JC, Campbell DN, Jaggers J, Mitchell MB. Diastolic inflow is associated with inefficient ventricular flow dynamics in Fontan patients. J Thorac Cardiovasc Surg 2021; 163:1195-1207. [DOI: 10.1016/j.jtcvs.2021.06.064] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 06/17/2021] [Accepted: 06/17/2021] [Indexed: 12/17/2022]
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17
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Vaiyani D, Matsuo K, Kanaan U, Patel B, Akintoye O, Travers CD, Kelleman M, Sachdeva R, Petit CJ. Total vascular resistance increases during volume-unloading in asymptomatic single ventricle patients. Am Heart J 2021; 236:69-79. [PMID: 33640333 DOI: 10.1016/j.ahj.2021.02.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 02/23/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE While the surgical stages of single ventricle (SV) palliation serve to separate pulmonary venous and systemic venous return, and to volume-unload the SV, staged palliation also results in transition from parallel to series circulation, increasing total vascular resistance. How this transition affects pressure loading of the SV is as yet unreported. METHODS We performed a retrospective chart review of Stage I, II, and III cardiac catheterization (CC) and echocardiographic data from 2001-2017 in all SV pts, with focus on systemic, pulmonary, and total vascular resistance (SVR, PVR, TVR respectively). Longitudinal analyses were performed with log-transformed variables. Effects of SVR-lowering medications were analyzed using Wilcoxon rank-sum testing. RESULTS There were 372 total patients who underwent CC at a Stage I (median age of 4.4 months, n=310), Stage II (median age 2.7 years, n = 244), and Stage III (median age 7.3 years, n = 113). Total volume loading decreases with progression to Stage III (P< 0.001). While PVR gradually increases from Stage II to Stage III, and SVR increases from Stage I to Stage III, TVR dramatically increases with progress towards series circulation. TVR was not affected by use of systemic vasodilator therapy. TVR, PVR, SVR, and CI did not correlate with indices of SV function at Stage III. CONCLUSIONS TVR steadily increases with an increasing contribution from SVR over progressive stages. TVR was not affected by systemic vasodilator agents. TVR did not correlate with echo-based indices of SV function. Further studies are needed to see if modulating TVR can improve exercise tolerance and outcomes.
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Affiliation(s)
- Danish Vaiyani
- Division of Cardiology, Children's Healthcare of Atlanta, Atlanta, GA; Division of Pediatrics, Emory University, Atlanta, GA.
| | | | - Usama Kanaan
- Division of Cardiology, Children's Healthcare of Atlanta, Atlanta, GA; Division of Pediatrics, Emory University, Atlanta, GA
| | | | - Ololade Akintoye
- Division of Cardiology, Children's Healthcare of Atlanta, Atlanta, GA; Division of Pediatrics, Emory University, Atlanta, GA
| | | | | | - Ritu Sachdeva
- Division of Cardiology, Children's Healthcare of Atlanta, Atlanta, GA; Division of Pediatrics, Emory University, Atlanta, GA
| | - Christopher J Petit
- Division of Cardiology, Columbia University Vagelos College of Physicians and Surgeons, Columbia University, New York, NY
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18
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Carvedilol Does Not Improve Exercise Performance in Fontan Patients: Results of a Crossover Trial. Pediatr Cardiol 2021; 42:934-941. [PMID: 33585998 DOI: 10.1007/s00246-021-02565-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 01/27/2021] [Indexed: 10/22/2022]
Abstract
Increased circulating catecholamines are associated with worse exercise performance in adult heart failure patients. Patients with Fontan physiology have increased circulating catecholamines and theoretically could benefit from beta blockade. We hypothesized that carvedilol would improve exercise performance in Fontan patients. A double-blind, placebo-controlled, crossover trial of carvedilol was performed. Single ventricle patients between the ages of 10 and 35 years with a previous Fontan operation who were able to complete a maximal exercise test (respiratory exchange ratio > 1.0) were included. Two 12-week treatment arms were separated by a 6-week washout period. Exercise testing was performed at beginning and end of each treatment arm. Primary endpoint was improvement in peak oxygen consumption/kg (pVO2) from baseline. Of the 26 subjects enrolled, 23 completed the study. Four subjects did not reach goal maximum carvedilol dose, vs. 1 for placebo (p = 0.14). The mean change in pVO2 between treatments was not different (carvedilol = - 2.1 mL/kg/min v. placebo = - 1.42, p = 0.28). Carvedilol therapy decreased peak heart rate by 4.2 ± 20.2 bpm, (p < 0.01) leading to an increase in peak oxygen pulse (p < 0.01). Serum N-terminal-proBNP increased with carvedilol therapy (mean change of + 23.77 pg/mL) compared to placebo (mean change of - 5.37 pg/mL, p = 0.03). There were no serious adverse events related to study drug. Carvedilol was not associated with improved exercise performance and was associated with mildly increased N-terminal-proBNP. This study does not support the routine administration of carvedilol to healthy Fontan patients.Clinical Trials Registration ClinicalTrials.gov Identifier: NCT02946892. Registered October 27, 2016. Retrospectively Registered. https://clinicaltrials.gov/ct2/show/NCT02946892.
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19
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Vaikunth SS, Lui GK. Heart failure with reduced and preserved ejection fraction in adult congenital heart disease. Heart Fail Rev 2021; 25:569-581. [PMID: 31873841 DOI: 10.1007/s10741-019-09904-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Heart failure with reduced ejection fraction (HFrEF) is common in patients with adult congenital heart disease. Many of the most common congenital defects have a high prevalence of HFrEF, including left-sided obstructive lesions (aortic stenosis, coarctation of the aorta, Shone complex), tetralogy of Fallot, Ebstein anomaly, lesions in which there is a systemic right ventricle, and lesions palliated with a Fontan circulation. However, heart failure with preserved ejection fraction (HFpEF) is also prevalent in all these lesions. Comprehensive evaluation includes physical exam, biomarkers, echocardiography and advanced imaging, exercise stress testing, and, in some cases, invasive hemodynamics. Guideline-directed medical therapy for HFrEF can be applied to left-sided lesions and may be considered on an individual basis for systemic right ventricle and single-ventricle patients. Medical therapy is limited for HFpEF. However, in both HFrEF and HFpEF, ventricular dyssynchrony and arrhythmias play an important role, and medications for rhythm control, ablation, and cardiac resynchronization therapy should be considered. Finally, aggressive management of cardiovascular risk factors and comorbidities, including, but not limited to, hypertension, obesity, diabetes, dyslipidemia, and obstructive sleep apnea, cannot be overemphasized.
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Affiliation(s)
- Sumeet S Vaikunth
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Palo Alto, CA, USA.
| | - George K Lui
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Palo Alto, CA, USA.,Department of Pediatrics, Division of Pediatric Cardiology, Stanford University School of Medicine, Palo Alto, CA, USA
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20
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Tran DL, Gibson H, Maiorana AJ, Verrall CE, Baker DW, Clode M, Lubans DR, Zannino D, Bullock A, Ferrie S, Briody J, Simm P, Wijesekera V, D'Almeida M, Gosbell SE, Davis GM, Weintraub R, Keech AC, Puranik R, Ugander M, Justo R, Zentner D, Majumdar A, Grigg L, Coombes JS, d'Udekem Y, Morris NR, Ayer J, Celermajer DS, Cordina R. Exercise Intolerance, Benefits, and Prescription for People Living With a Fontan Circulation: The Fontan Fitness Intervention Trial (F-FIT)-Rationale and Design. Front Pediatr 2021; 9:799125. [PMID: 35071139 PMCID: PMC8771702 DOI: 10.3389/fped.2021.799125] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/07/2021] [Indexed: 12/16/2022] Open
Abstract
Background: Despite developments in surgical techniques and medical care, people with a Fontan circulation still experience long-term complications; non-invasive therapies to optimize the circulation have not been established. Exercise intolerance affects the majority of the population and is associated with worse prognosis. Historically, people living with a Fontan circulation were advised to avoid physical activity, but a small number of heterogenous, predominantly uncontrolled studies have shown that exercise training is safe-and for unique reasons, may even be of heightened importance in the setting of Fontan physiology. The mechanisms underlying improvements in aerobic exercise capacity and the effects of exercise training on circulatory and end-organ function remain incompletely understood. Furthermore, the optimal methods of exercise prescription are poorly characterized. This highlights the need for large, well-designed, multi-center, randomized, controlled trials. Aims and Methods: The Fontan Fitness Intervention Trial (F-FIT)-a phase III clinical trial-aims to optimize exercise prescription and delivery in people with a Fontan circulation. In this multi-center, randomized, controlled study, eligible Fontan participants will be randomized to either a 4-month supervised aerobic and resistance exercise training program of moderate-to-vigorous intensity followed by an 8-month maintenance phase; or usual care (control group). Adolescent and adult (≥16 years) Fontan participants will be randomized to either traditional face-to-face exercise training, telehealth exercise training, or usual care in a three-arm trial with an allocation of 2:2:1 (traditional:telehealth:control). Children (<16 years) will be randomized to either a physical activity and exercise program of moderate-to-vigorous intensity or usual care in a two-arm trial with a 1:1 allocation. The primary outcome is a change in aerobic exercise capacity (peak oxygen uptake) at 4-months. Secondary outcomes include safety, and changes in cardiopulmonary exercise testing measures, peripheral venous pressure, respiratory muscle and lung function, body composition, liver stiffness, neuropsychological and neurocognitive function, physical activity levels, dietary and nutritional status, vascular function, neurohormonal activation, metabolites, cardiac function, quality of life, musculoskeletal fitness, and health care utilization. Outcome measures will be assessed at baseline, 4-months, and 12-months. This manuscript will describe the pathophysiology of exercise intolerance in the Fontan circulation and the rationale and protocol for the F-FIT.
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Affiliation(s)
- Derek L Tran
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia.,Charles Perkins Centre, Heart Research Institute, Sydney, NSW, Australia.,Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Hannah Gibson
- Charles Perkins Centre, Heart Research Institute, Sydney, NSW, Australia
| | - Andrew J Maiorana
- School of Allied Health, Curtin University, Perth, WA, Australia.,Allied Health Department, Fiona Stanley Hospital, Perth, WA, Australia
| | - Charlotte E Verrall
- The University of Sydney Westmead Clinical School, Sydney, NSW, Australia.,Heart Centre for Children, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - David W Baker
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia
| | - Melanie Clode
- Heart Research Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - David R Lubans
- School of Education, Priority Research Centre for Physical Activity and Nutrition, The University of Newcastle, Newcastle, NSW, Australia
| | - Diana Zannino
- Heart Research Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Andrew Bullock
- Paediatric and Adult Congenital Cardiology, Perth Children's Hospital, Perth, WA, Australia
| | - Suzie Ferrie
- Department of Nutrition and Dietetics, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Julie Briody
- Department of Nuclear Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Peter Simm
- Heart Research Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Vishva Wijesekera
- Department of Cardiology, The Prince Charles Hospital, Brisbane, QLD, Australia
| | - Michelle D'Almeida
- Charles Perkins Centre, Heart Research Institute, Sydney, NSW, Australia
| | - Sally E Gosbell
- Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia.,Charles Perkins Centre, Heart Research Institute, Sydney, NSW, Australia.,Heart Centre for Children, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Glen M Davis
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Robert Weintraub
- Heart Research Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia.,Department of Cardiology, The Royal Children's Hospital, Melbourne, VIC, Australia
| | - Anthony C Keech
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia.,NHMRC Clinical Trials Centre, The University of Sydney, Sydney, NSW, Australia
| | - Rajesh Puranik
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia
| | - Martin Ugander
- Royal North Shore Hospital, The Kolling Institute, Sydney, NSW, Australia
| | - Robert Justo
- Paediatric Cardiac Service, Queensland Children's Hospital, Brisbane, QLD, Australia
| | - Dominica Zentner
- The University of Melbourne Medical School, Melbourne, VIC, Australia.,Department of Cardiology, The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Avik Majumdar
- Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia.,Australian National Liver Transplant Unit, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Leeanne Grigg
- The University of Melbourne Medical School, Melbourne, VIC, Australia.,Department of Cardiology, The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Jeff S Coombes
- School of Human Movement and Nutrition Sciences, Centre for Research on Exercise, Physical Activity, and Health, The University of Queensland, Brisbane, QLD, Australia
| | - Yves d'Udekem
- Division of Cardiac Surgery, Children's National Hospital, Washington, DC, United States
| | - Norman R Morris
- Allied Health Collaborative and Queensland Lung Transplant Service, The Prince Charles Hospital, Brisbane, QLD, Australia.,School of Health Sciences and Social Work, Griffith University, Gold Coast, QLD, Australia
| | - Julian Ayer
- The University of Sydney Westmead Clinical School, Sydney, NSW, Australia.,Heart Centre for Children, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - David S Celermajer
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia.,Charles Perkins Centre, Heart Research Institute, Sydney, NSW, Australia
| | - Rachael Cordina
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Central Clinical School, The University of Sydney School of Medicine, Sydney, NSW, Australia.,Charles Perkins Centre, Heart Research Institute, Sydney, NSW, Australia.,Heart Research Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia
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21
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Prediction of Fluid Responsiveness by Stroke Volume Variation in Children Undergoing Fontan Operation. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2595960. [PMID: 33224977 PMCID: PMC7669329 DOI: 10.1155/2020/2595960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 10/19/2020] [Accepted: 10/28/2020] [Indexed: 11/17/2022]
Abstract
Background Fontan operation is a palliative medical procedure performed on children with single-ventricle defects. As postoperative success of the procedure largely depends on the preload volume, it is necessary to maintain an appropriate pressure gradient between the systemic vein and the left atrium to ensure the effective volume of systemic circulation. However, there is a lack of effective indexes to evaluate fluid responsiveness in Fontan patients. Stroke volume variation (SVV) is a dynamic hemodynamic parameter based on cardiopulmonary interaction in mechanical ventilation. This study is aimed at validating the sensitivity and specificity of SVV and central venous pressure (CVP) in assessing the fluid responsiveness of Fontan patients. Method Sixty-four children with single ventricle who underwent modified Fontan operation between May 2018 and January 2020 were included in this study. Patients were administered 10 ml·kg−1 albumin for fluid challenge within 10 min after cardiopulmonary bypass. Before and after fluid challenge, the invasive arterial pressure module was connected to MostCare™ equipment to collect the cardiac index (CI) and SVV dynamically in a time window of 30 s at a frequency of 1000 Hz. According to the range of CI change, patients with ΔCI ≥ 15% were classified into the responder (R) group and those with ΔCI < 15% into the nonresponder (NR) group. Using SVV and CVP as indicators, the receiver operating characteristic (ROC) curve of the patients was established, and the area under curve (AUC), diagnostic threshold, sensitivity, and specificity were calculated. Results The SVV values were 16.28% (25th and 75th percentiles 14.17%-19.24%) and 13.68% (25th and 75th percentiles 12.90%-15.89%) before and after fluid challenge treatment in responders, respectively, and the values were 18.60 ± 1.83 mmHg before and 20.20 ± 2.39 mmHg for CVP after treatment. The AUC of SVV was 0.74 (95% confidence interval (CI) 0.54-0.94, P < 0.05), and the cutoff value was 16%, offering a sensitivity of 50% and a specificity of 91.7%. Meanwhile, the AUC of CVP was 0.70 (95% CI 0.50-0.92, P > 0.05), and the cutoff value was 19.5 mmHg, offering a sensitivity of 58% and a specificity of 76%. Conclusion SVV exhibited a good predictive value for fluid responsiveness in pediatric Fontan patients. Appropriate fluid therapy according to SVV could improve the cardiac function of such patients. Trial registration. This study was registered in Chinese Clinical Trail Registry on Jan 26, 2018. Registration number is ChiCTR1800014654. Registry URL is http://www.chictr.org.cn/showproj.aspx?proj=25019. This observational prospective study was approved by the Local Ethics Committee of Shanghai Children's Medical Center affiliated to Shanghai Jiao Tong University (SCMCIRB-K2017035).
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22
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Performing modified fontan before six years of age leads to superior long-term exercise capacity. Hellenic J Cardiol 2020; 61:351-353. [DOI: 10.1016/j.hjc.2019.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 12/20/2019] [Indexed: 11/23/2022] Open
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23
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Cummings JJ, Siegrist KK, Deegan RJ, Solórzano CC, Eagle SS. Robotic Adrenalectomy for Pheochromocytoma in a Patient with Fontan Physiology. J Cardiothorac Vasc Anesth 2020; 34:2446-2451. [PMID: 32434722 DOI: 10.1053/j.jvca.2020.02.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 02/25/2020] [Accepted: 02/27/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Jared J Cummings
- Division of Cardiothoracic Anesthesiology, Vanderbilt University Medical Center, Nashville, TN
| | - Kara K Siegrist
- Division of Cardiothoracic Anesthesiology, Vanderbilt University Medical Center, Nashville, TN
| | - Robert J Deegan
- Division of Cardiothoracic Anesthesiology, Vanderbilt University Medical Center, Nashville, TN
| | - Carmen C Solórzano
- Division of Cardiothoracic Anesthesiology, Vanderbilt University Medical Center, Nashville, TN
| | - Susan S Eagle
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN.
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24
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Schäfer M, Frank BS, Humphries SM, Hunter KS, Carmody KL, Jacobsen R, Mitchell MB, Jaggers J, Stone ML, Morgan GJ, Barker AJ, Browne LP, Ivy DD, Younoszai A, Di Maria MV. Flow profile characteristics in Fontan circulation are associated with the single ventricle dilation and function: principal component analysis study. Am J Physiol Heart Circ Physiol 2020; 318:H1032-H1040. [PMID: 32167782 DOI: 10.1152/ajpheart.00686.2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The Fontan circulation is characterized as a nonpulsatile flow propagation without a pressure-generating ventricle. However, flow through the Fontan circulation still exhibits oscillatory waves as a result of pressure changes generated by the systemic single ventricle. Identification of discrete flow patterns through the Fontan circuit may be important to understand single ventricle performance. Ninety-seven patients with Fontan circulation underwent phase-contrast MRI of the right pulmonary artery, yielding subject-specific flow waveforms. Principal component (PC) analysis was performed on preprocessed flow waveforms. Principal components were then correlated with standard MRI indices of function, volume, and aortopulmonary collateral flow. The first principal component (PC) described systolic versus diastolic-dominant flow through the Fontan circulation, accounting for 31.3% of the variance in all waveforms. The first PC correlated with end-diastolic volume (R = 0.34, P = 0.001), and end-systolic volume (R = 0.30, P = 0.003), cardiac index (R = 0.51, P < 0.001), and the amount of aortopulmonary collateral flow (R = 0.25, P = 0.027)-lower ventricular volumes and a smaller volume of collateral flow-were associated with diastolic-dominant cavopulmonary flow. The second PC accounted for 19.5% of variance and described late diastolic acceleration versus deceleration and correlated with ejection fraction-diastolic deceleration was associated with higher ejection fraction. Principal components describing the diastolic flow variations in pulmonary arteries are related to the single ventricle function and volumes. Particularly, diastolic-dominant flow without late acceleration appears to be related to preserved ventricular volume and function, respectively.NEW & NOTEWORTHY The exact physiological significance of flow oscillations of phasic and temporal flow variations in Fontan circulation is unknown. With the use of principal component analysis, we discovered that flow variations in the right pulmonary artery of Fontan patients are related to the single ventricle function and volumes. Particularly, diastolic-dominant flow without late acceleration appears to be related to more ideal ventricular volume and systolic function, respectively.
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Affiliation(s)
- Michal Schäfer
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Benjamin S Frank
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | | | - Kendall S Hunter
- Department of Bioengineering, College of Engineering and Applied Sciences, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Katherine L Carmody
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Roni Jacobsen
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Max B Mitchell
- Section of Congenital Heart Surgery, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - James Jaggers
- Section of Congenital Heart Surgery, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Matthew L Stone
- Section of Congenital Heart Surgery, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Gareth J Morgan
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Alex J Barker
- Department of Bioengineering, College of Engineering and Applied Sciences, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado.,Department of Radiology, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Lorna P Browne
- Department of Radiology, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - D Dunbar Ivy
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Adel Younoszai
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
| | - Michael V Di Maria
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver, Anschutz Medical Campus, Denver, Colorado
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25
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Di Maria MV, Patel SS, Fernie JC, Rausch CM. Exercise Performance at Increased Altitude After Fontan Operation: Comparison to Normal Controls and Correlation with Cavopulmonary Hemodynamics. Pediatr Cardiol 2020; 41:642-649. [PMID: 32006081 DOI: 10.1007/s00246-020-02311-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 01/22/2020] [Indexed: 11/28/2022]
Abstract
Exercise performance declines as patients who have undergone Fontan operation enter adolescence. However, the effect of altitude on functional capacity after Fontan remains inadequately studied. Our aim was to describe exercise performance in a cohort of patients with Fontan physiology living at increased altitude and compare to a normal control group and relate these data to invasively derived hemodynamics. We hypothesized that peak oxygen consumption ([Formula: see text]) would be decreased, in association with elevated mean pulmonary artery pressure (mPAP) and pulmonary vascular resistance (PVRi). Patients were evaluated in a multidisciplinary clinic for patients with Fontan physiology. Evaluation included cardiopulmonary exercise test and cardiac catheterization at predetermined intervals. Descriptive statistics were calculated. Associations of catheterization and exercise testing measures with [Formula: see text] were estimated with Spearman correlation coefficients. One hundred patients with age- and gender-matched controls were included in the analysis. The mean age was 13.3 ± 3.9 years, with mean weight of 47.1 ± 18.4 kg. The mean [Formula: see text] was 29.0 ± 7.8 ml/kg/min, significantly lower than the control group, 40.2 ± 8.4 ml/kg/min (p < 0.0001). There was no statistically significant linear correlation between [Formula: see text] and mPAP or PVRi. We characterized exercise performance in a large cohort with Fontan physiology living at increased altitude and showed a decrease in [Formula: see text] compared to controls. Our data do not support the hypothesis that moderately increased altitude has a detrimental effect on exercise performance, nor is there a substantial link between poor cavopulmonary hemodynamics and exercise in this setting.
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Affiliation(s)
- Michael V Di Maria
- Section of Pediatric Cardiology, Department of Pediatrics, Heart Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA. .,Children's Hospital Colorado, 13123 E. 16th Ave., Box 100, Aurora, CO, 80045, USA.
| | - Sonali S Patel
- Section of Pediatric Cardiology, Department of Pediatrics, Heart Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA
| | - Julie C Fernie
- Section of Pediatric Cardiology, Department of Pediatrics, Heart Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA
| | - Christopher M Rausch
- Section of Pediatric Cardiology, Department of Pediatrics, Heart Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA
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26
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Cordina R. Echocardiographic assessment of diastolic function in the Fontan heart: Feasible or flight of fancy? Int J Cardiol 2020; 300:297-298. [DOI: 10.1016/j.ijcard.2019.10.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 10/12/2019] [Accepted: 10/14/2019] [Indexed: 11/16/2022]
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27
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Radman M, McGuire J, Zimmerman J. Childhood Obesity, Endothelial Cell Activation, and Critical Illness. Front Pediatr 2020; 8:441. [PMID: 32850554 PMCID: PMC7419464 DOI: 10.3389/fped.2020.00441] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/25/2020] [Indexed: 12/13/2022] Open
Abstract
Pediatric obesity is increasing in prevalence and is frequently an antecedent to adult obesity and adult obesity-associated morbidities such as atherosclerosis, type II diabetes, and chronic metabolic syndrome. Endothelial cell activation, one aspect of inflammation, is present in the early stages of atherosclerosis, often prior to the onset of symptoms. Endothelial activation is a pathological condition in which vasoconstricting, pro-thrombotic, and proliferative mediators predominate protective vasodilating, anti-thrombogenic, and anti-mitogenic mediators. Many studies report poor outcomes among obese children with systemic endothelial activation. Likewise, the link between childhood obesity and poor outcomes in critical illness is well-established. However, the link between obesity and severity of endothelial activation specifically in the setting of critical illness is largely unstudied. Although endothelial cell activation is believed to worsen disease in critically ill children, the nature and extent of this response is poorly understood due to the difficulty in measuring endothelial cell dysfunction and destruction. Based on the data available for the obese, asymptomatic population and the obese, critically ill population, the authors posit that obesity, and obesity-associated chronic inflammation, including oxidative stress and insulin resistance, may contribute to endothelial activation and associated worse outcomes among critically ill children. A research agenda to examine this hypothesis is suggested.
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Affiliation(s)
- Monique Radman
- Seattle Children's Hospital, Pediatric Critical Care, University of Washington, Seattle, WA, United States
| | - John McGuire
- Seattle Children's Hospital, Pediatric Critical Care, University of Washington, Seattle, WA, United States
| | - Jerry Zimmerman
- Seattle Children's Hospital, Pediatric Critical Care, University of Washington, Seattle, WA, United States
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28
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Goldberg DJ, Zak V, Goldstein BH, Schumacher KR, Rhodes J, Penny DJ, Petit CJ, Ginde S, Menon SC, Kim SH, Kim GB, Nowlen TT, DiMaria MV, Frischhertz BP, Wagner JB, McHugh KE, McCrindle BW, Shillingford AJ, Sabati AA, Yetman AT, John AS, Richmond ME, Files MD, Payne RM, Mackie AS, Davis CK, Shahanavaz S, Hill KD, Garg R, Jacobs JP, Hamstra MS, Woyciechowski S, Rathge KA, McBride MG, Frommelt PC, Russell MW, Urbina EM, Yeager JL, Pemberton VL, Stylianou MP, Pearson GD, Paridon SM. Results of the FUEL Trial. Circulation 2019; 141:641-651. [PMID: 31736357 DOI: 10.1161/circulationaha.119.044352] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The Fontan operation creates a total cavopulmonary connection, a circulation in which the importance of pulmonary vascular resistance is magnified. Over time, this circulation leads to deterioration of cardiovascular efficiency associated with a decline in exercise performance. Rigorous clinical trials aimed at improving physiology and guiding pharmacotherapy are lacking. METHODS The FUEL trial (Fontan Udenafil Exercise Longitudinal) was a phase III clinical trial conducted at 30 centers. Participants were randomly assigned udenafil, 87.5 mg twice daily, or placebo in a 1:1 ratio. The primary outcome was the between-group difference in change in oxygen consumption at peak exercise. Secondary outcomes included between-group differences in changes in submaximal exercise at the ventilatory anaerobic threshold, the myocardial performance index, the natural log of the reactive hyperemia index, and serum brain-type natriuretic peptide. RESULTS Between 2017 and 2019, 30 clinical sites in North America and the Republic of Korea randomly assigned 400 participants with Fontan physiology. The mean age at randomization was 15.5±2 years; 60% of participants were male, and 81% were white. All 400 participants were included in the primary analysis with imputation of the 26-week end point for 21 participants with missing data (11 randomly assigned to udenafil and 10 to placebo). Among randomly assigned participants, peak oxygen consumption increased by 44±245 mL/min (2.8%) in the udenafil group and declined by 3.7±228 mL/min (-0.2%) in the placebo group (P=0.071). Analysis at ventilatory anaerobic threshold demonstrated improvements in the udenafil group versus the placebo group in oxygen consumption (+33±185 [3.2%] versus -9±193 [-0.9%] mL/min, P=0.012), ventilatory equivalents of carbon dioxide (-0.8 versus -0.06, P=0.014), and work rate (+3.8 versus +0.34 W, P=0.021). There was no difference in change of myocardial performance index, the natural log of the reactive hyperemia index, or serum brain-type natriuretic peptide level. CONCLUSIONS In the FUEL trial, treatment with udenafil (87.5 mg twice daily) was not associated with an improvement in oxygen consumption at peak exercise but was associated with improvements in multiple measures of exercise performance at the ventilatory anaerobic threshold. CLINICAL TRIAL REGISTRATION URL: https://www.clinicaltrials.gov. Unique identifier: NCT02741115.
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Affiliation(s)
- David J Goldberg
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, PA (D.J.G., S.W., M.G.M., S.M.P.)
| | - Victor Zak
- New England Research Institutes, Watertown, MA (V.Z.)
| | - Bryan H Goldstein
- Division of Cardiology, Cincinnati Children's Hospital Medical Center, OH (B.H.G., M.S.H., K.A.R., E.M.U.)
| | - Kurt R Schumacher
- Division of Cardiology, C.S. Mott Children's Hospital, Ann Arbor, MI (K.R.S., M.W.R.)
| | - Jonathan Rhodes
- Department of Cardiology, Children's Hospital Boston, MA (J.R.)
| | - Daniel J Penny
- Division of Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX (D.J.P.)
| | - Christopher J Petit
- Emory University School of Medicine, Children's Healthcare of Atlanta, GA (C.J.P.)
| | - Salil Ginde
- Division of Cardiology, Medical College of Wisconsin, Children's Hospital of Wisconsin, Milwaukee (S.G., P.C.F.)
| | - Shaji C Menon
- Division of Pediatric Cardiology, University of Utah, Salt Lake City (S.C.M.)
| | - Seong-Ho Kim
- Department of Pediatrics, Sejong General Hospital, Bucheon-Si, South Korea (S.-H.K.)
| | - Gi Beom Kim
- Seoul National University School of Medicine, Seoul National University Children's Hospital, South Korea (G.B.K.)
| | - Todd T Nowlen
- Heart Center, Phoenix Children's Hospital, AZ (T.T.N.)
| | - Michael V DiMaria
- Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora (M.V.D.)
| | - Benjamin P Frischhertz
- Division of Cardiology, Vanderbilt University School of Medicine, Nashville, TN (B.P.F.)
| | - Jonathan B Wagner
- Divisions of Cardiology and Clinical Pharmacology, Children's Mercy Kansas City, MO (J.B.W.)
| | - Kimberly E McHugh
- Division of Pediatric Cardiology, Medical University of South Carolina, Charleston (K.E.M.)
| | - Brian W McCrindle
- Division of Cardiology, The Hospital for Sick Children, University of Toronto, Ontario (B.W.M.)
| | - Amanda J Shillingford
- Nemours Cardiac Center, Nemours/Alfred I. DuPont Hospital for Children, Wilmington, DE (A.J.S.)
| | - Arash A Sabati
- Los Angeles Children's Hospital, Division of Cardiology, CA (A.A.S.)
| | - Anji T Yetman
- Children's Hospital and Medical Center, University of Nebraska, Omaha (A.T.Y.)
| | - Anitha S John
- Division of Cardiology, Children's National Health System, Washington, DC (A.S.J.)
| | - Marc E Richmond
- Division of Pediatric Cardiology, Morgan Stanley Children's Hospital, Columbia University Medical Center, New York, NY (M.E.R.)
| | - Matthew D Files
- Division of Cardiology, Seattle Children's Hospital, WA (M.D.F.)
| | - R Mark Payne
- Division of Cardiology, Riley Hospital for Children, Indianapolis, IN (R.M.P.)
| | - Andrew S Mackie
- Division of Cardiology, Stollery Children's Hospital, Edmonton, Alberta, Canada (A.S.M.)
| | | | | | - Kevin D Hill
- Duke Children's Pediatric and Congenital Heart Center, Durham, NC (K.D.H.)
| | - Ruchira Garg
- Division of Cardiology, Cedars-Sinai Medical Center, Los Angeles, CA (R.G.)
| | - Jeffrey P Jacobs
- Johns Hopkins All Children's Hospital, Department of Surgery, St Petersburg, FL (J.P.J.)
| | - Michelle S Hamstra
- Division of Cardiology, Cincinnati Children's Hospital Medical Center, OH (B.H.G., M.S.H., K.A.R., E.M.U.)
| | - Stacy Woyciechowski
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, PA (D.J.G., S.W., M.G.M., S.M.P.)
| | - Kathleen A Rathge
- Division of Cardiology, Cincinnati Children's Hospital Medical Center, OH (B.H.G., M.S.H., K.A.R., E.M.U.)
| | - Michael G McBride
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, PA (D.J.G., S.W., M.G.M., S.M.P.)
| | - Peter C Frommelt
- Division of Cardiology, Medical College of Wisconsin, Children's Hospital of Wisconsin, Milwaukee (S.G., P.C.F.)
| | - Mark W Russell
- Division of Cardiology, C.S. Mott Children's Hospital, Ann Arbor, MI (K.R.S., M.W.R.)
| | - Elaine M Urbina
- Division of Cardiology, Cincinnati Children's Hospital Medical Center, OH (B.H.G., M.S.H., K.A.R., E.M.U.)
| | - James L Yeager
- Consultant to Mezzion Pharma Co Ltd, Mezzion Pharma Co Ltd, Seoul, South Korea (J.L.Y.)
| | - Victoria L Pemberton
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD (V.L.P., M.P.S., G.D.P.)
| | - Mario P Stylianou
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD (V.L.P., M.P.S., G.D.P.)
| | - Gail D Pearson
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD (V.L.P., M.P.S., G.D.P.)
| | - Stephen M Paridon
- Division of Cardiology, The Children's Hospital of Philadelphia, Perelman School of Medicine, PA (D.J.G., S.W., M.G.M., S.M.P.)
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Rychik J, Atz AM, Celermajer DS, Deal BJ, Gatzoulis MA, Gewillig MH, Hsia TY, Hsu DT, Kovacs AH, McCrindle BW, Newburger JW, Pike NA, Rodefeld M, Rosenthal DN, Schumacher KR, Marino BS, Stout K, Veldtman G, Younoszai AK, d'Udekem Y. Evaluation and Management of the Child and Adult With Fontan Circulation: A Scientific Statement From the American Heart Association. Circulation 2019; 140:e234-e284. [PMID: 31256636 DOI: 10.1161/cir.0000000000000696] [Citation(s) in RCA: 407] [Impact Index Per Article: 81.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
It has been 50 years since Francis Fontan pioneered the operation that today bears his name. Initially designed for patients with tricuspid atresia, this procedure is now offered for a vast array of congenital cardiac lesions when a circulation with 2 ventricles cannot be achieved. As a result of technical advances and improvements in patient selection and perioperative management, survival has steadily increased, and it is estimated that patients operated on today may hope for a 30-year survival of >80%. Up to 70 000 patients may be alive worldwide today with Fontan circulation, and this population is expected to double in the next 20 years. In the absence of a subpulmonary ventricle, Fontan circulation is characterized by chronically elevated systemic venous pressures and decreased cardiac output. The addition of this acquired abnormal circulation to innate abnormalities associated with single-ventricle congenital heart disease exposes these patients to a variety of complications. Circulatory failure, ventricular dysfunction, atrioventricular valve regurgitation, arrhythmia, protein-losing enteropathy, and plastic bronchitis are potential complications of the Fontan circulation. Abnormalities in body composition, bone structure, and growth have been detected. Liver fibrosis and renal dysfunction are common and may progress over time. Cognitive, neuropsychological, and behavioral deficits are highly prevalent. As a testimony to the success of the current strategy of care, the proportion of adults with Fontan circulation is increasing. Healthcare providers are ill-prepared to tackle these challenges, as well as specific needs such as contraception and pregnancy in female patients. The role of therapies such as cardiovascular drugs to prevent and treat complications, heart transplantation, and mechanical circulatory support remains undetermined. There is a clear need for consensus on how best to follow up patients with Fontan circulation and to treat their complications. This American Heart Association statement summarizes the current state of knowledge on the Fontan circulation and its consequences. A proposed surveillance testing toolkit provides recommendations for a range of acceptable approaches to follow-up care for the patient with Fontan circulation. Gaps in knowledge and areas for future focus of investigation are highlighted, with the objective of laying the groundwork for creating a normal quality and duration of life for these unique individuals.
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Chen LJ, Zhang YQ, Bao SF, Zhong SW, Sun AM, Zhang ZF. Velocity vector imaging for the assessment of segmental ventricular function in children with a single right ventricle after cavopulmonary anastomosis. Curr Med Res Opin 2019; 35:203-210. [PMID: 29611724 DOI: 10.1080/03007995.2018.1460337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
OBJECTIVE Ventricular function assessment is very important for the treatment and prognostic classification of children with a single right ventricle (SRV) after cavopulmonary anastomosis (CPA). However, unusual ventricular shapes can result in inaccurate measurements. The aim of this study was to evaluate velocity vector imaging (VVI) for assessing segmental ventricular function in children with SRV after CPA. METHODS Twenty-one children with SRV after CPA and 21 age- and sex-matched children with normal biventricular anatomy and function were included. The longitudinal velocity, displacement, strain and strain rate were measured in the two groups in six segments by VVI. The velocity, displacement, strain and strain rate of the SRVs were compared with max(dp/dt) measured during simultaneous cardiac catheterization in the SRV subjects. RESULTS The control group consisted of 13 males and 8 females (69% males) with a mean age of 6.7 ± 3.5 years and mean weight of 20.5 ± 6.5 kg, and the study group consisted of 13 males and 8 females with a mean age 6.7 ± 3.7 years and mean weight of 20.6 ± 6.8 kg. Age, weight and sex distribution were similar between the groups (all, p > .05). Strain and strain rate values in all six segments were significantly lower in the study group than in the control group (all, p < .05). The max(dp/dt) of the SRV was 522.84 ± 158.32 mmHg/s, and the strain rate of the basal segment at the rudimentary chamber correlated best with max(dp/dt) (r = 0.74, p < .01). CONCLUSIONS Segmental ventricular dysfunction was present in children with SRV after CPA, and it could be assessed using VVI.
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Affiliation(s)
- Li-Jun Chen
- a Department of Pediatric Cardiology , Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Yu-Qi Zhang
- a Department of Pediatric Cardiology , Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Sheng-Fang Bao
- a Department of Pediatric Cardiology , Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Shu-Wen Zhong
- a Department of Pediatric Cardiology , Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Ai-Min Sun
- b Department of Medical Imaging , Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Zhi-Fang Zhang
- a Department of Pediatric Cardiology , Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine , Shanghai , China
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Design and rationale of the Fontan Udenafil Exercise Longitudinal (FUEL) trial. Am Heart J 2018; 201:1-8. [PMID: 29910047 DOI: 10.1016/j.ahj.2018.03.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 03/24/2018] [Indexed: 11/23/2022]
Abstract
The Fontan operation creates a circulation characterized by elevated central venous pressure and low cardiac output. Over time, these characteristics result in a predictable and persistent decline in exercise performance that is associated with an increase in morbidity and mortality. A medical therapy that targets the abnormalities of the Fontan circulation might, therefore, be associated with improved outcomes. Udenafil, a phosphodiesterase type 5 inhibitor, has undergone phase I/II testing in adolescents who have had the Fontan operation and has been shown to be safe and well tolerated in the short term. However, there are no data regarding the long-term efficacy of udenafil in this population. The Fontan Udenafil Exercise Longitudinal (FUEL) Trial is a randomized, double-blind, placebo-controlled phase III clinical trial being conducted by the Pediatric Heart Network in collaboration with Mezzion Pharma Co, Ltd. This trial is designed to test the hypothesis that treatment with udenafil will lead to an improvement in exercise capacity in adolescents who have undergone the Fontan operation. A safety extension trial, the FUEL Open-Label Extension Trial (FUEL OLE), offers the opportunity for all FUEL subjects to obtain open-label udenafil for an additional 12 months following completion of FUEL, and evaluates the long-term safety and tolerability of this medication. This manuscript describes the rationale and study design for FUEL and FUEL OLE. Together, these trials provide an opportunity to better understand the role of medical management in the care of those who have undergone the Fontan operation.
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Rijnberg FM, Hazekamp MG, Wentzel JJ, de Koning PJ, Westenberg JJ, Jongbloed MR, Blom NA, Roest AA. Energetics of Blood Flow in Cardiovascular Disease. Circulation 2018; 137:2393-2407. [DOI: 10.1161/circulationaha.117.033359] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | | | - Jolanda J. Wentzel
- Leiden University Medical Center, The Netherlands. Department of Biomechanical Engineering, Erasmus Medical Center, Rotterdam, The Netherlands (J.J.W.)
| | | | | | | | - Nico A. Blom
- Department of Pediatric Cardiology (N.A.B., A.A.W.R.)
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Miranda WR, Egbe AC, Hagler DJ, Taggart NW, Nishimura RA, Connolly HM, Warnes CA. Filling pressures in Fontan revisited: Comparison between pulmonary artery wedge, ventricular end-diastolic, and left atrial pressures in adults. Int J Cardiol 2018; 255:32-36. [DOI: 10.1016/j.ijcard.2017.12.098] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 12/22/2017] [Indexed: 10/18/2022]
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34
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Ni MW, Prather RO, Rodriguez G, Quinn R, Divo E, Fogel M, Kassab AJ, DeCampli WM. Computational Investigation of a Self-Powered Fontan Circulation. Cardiovasc Eng Technol 2018; 9:202-216. [PMID: 29464511 DOI: 10.1007/s13239-018-0342-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 02/12/2018] [Indexed: 11/25/2022]
Abstract
Children born with anatomic or functional "single ventricle" must progress through two or more major operations to sustain life. This management sequence culminates in the total cavopulmonary connection, or "Fontan" operation. A consequence of the "Fontan circulation", however, is elevated central venous pressure and inadequate ventricular preload, which contribute to continued morbidity. We propose a solution to these problems by increasing pulmonary blood flow using an "injection jet" (IJS) in which the source of blood flow and energy is the ventricle itself. The IJS has the unique property of lowering venous pressure while enhancing pulmonary blood flow and ventricular preload. We report preliminary results of an analysis of this circulation using a tightly-coupled, multi-scale computational fluid dynamics model. Our calculations show that, constraining the excess volume load to the ventricle at 50% (pulmonary to systemic flow ratio of 1.5), an optimally configured IJS can lower venous pressure by 3 mmHg while increasing systemic oxygen delivery. Even this small decrease in venous pressure may have substantial clinical impact on the Fontan patient. These findings support the potential for a straightforward surgical modification to decrease venous pressure, and perhaps improve clinical outcome in selected patients.
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Affiliation(s)
- Marcus W Ni
- Department of Mechanical and Aerospace Engineering, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL, 32816, USA.
| | - Ray O Prather
- Department of Mechanical and Aerospace Engineering, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL, 32816, USA
| | - Giovanna Rodriguez
- Department of Mechanical and Aerospace Engineering, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL, 32816, USA
| | - Rachel Quinn
- College of Medicine, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL, USA
| | - Eduardo Divo
- Department of Mechanical Engineering, Embry-Riddle Aeronautical University, 600 S Clyde Morris Blvd, Daytona Beach, FL, USA
| | - Mark Fogel
- The Perelman School of Medicine at The University of Pennsylvania, Philadelphia, PA, USA.,Division of Cardiology/Department of Pediatrics and the Department of Radiology, The Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA, USA
| | - Alain J Kassab
- Department of Mechanical and Aerospace Engineering, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL, 32816, USA
| | - William M DeCampli
- College of Medicine, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL, USA.,Arnold Palmer Hospital for Children, 92 W Miller St, Orlando, FL, USA
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35
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Egbe A, Khan AR, Miranda WR, Ammash NM, Warnes CA, Said SS, Taggart NW, Akintoye E, Veldtman GR, Connolly HM. Mechanism for temporal changes in exercise capacity after Fontan palliation: Role of Doppler echocardiography. Am Heart J 2018; 196:144-152. [PMID: 29421006 DOI: 10.1016/j.ahj.2017.10.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 10/16/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND The objective was to better understand Doppler hemodynamics and exercise capacity in patients with Fontan palliation by delineating the hemodynamic mechanism for temporal changes in their peak oxygen consumption (V̇o2). METHODS We performed a retrospective review of adult Fontan patients with systemic left ventricle (LV) who underwent serial transthoracic echocardiograms (TTE) and cardiopulmonary exercise tests (CPET) at Mayo Clinic in 2000-2015. TTE and CPET data were used (1) to determine agreement between V̇o2 and Doppler-derived LV function indices (eg, stroke volume index [SVI] and cardiac index [CI]) and (2) to determine agreement between temporal changes in peak V̇o2 and LV function indices. RESULTS Seventy-five patients (44 men; 59%) underwent 191 pairs of TTE and CPET. At baseline, mean age was 24±3 years, peak V̇o2 was 22.9±4.1 mL/kg/min (63±11 percent predicted), SVI was 43±15 mL/m2, and CI was 2.9±0.9 L/min/m2. Peak V̇o2 correlated with SVI (r=0.30, P<.001) and with CI (r=0.45, P<.001) in the 153 pairs of TTE and CPET in patients without cirrhosis. Temporal changes in percent predicted peak V̇o2 correlated with changes in SVI (r=0.48, P=.005) and CI (r=0.49, P=.004) among the 33 patients without interventions during the study. In the 19 patients with Fontan conversion, percent predicted peak V̇o2 and chronotropic index improved. CONCLUSIONS Overall, there was a temporal decline in peak V̇o2 that correlated with decline in Doppler SVI. In the patients who had Fontan conversion operation, there was a temporal improvement in peak V̇o2 that correlated with improvement in chronotropic index.
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36
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Daniels CJ, Bradley EA, Landzberg MJ, Aboulhosn J, Beekman RH, Book W, Gurvitz M, John A, John B, Marelli A, Marino BS, Minich LL, Poterucha JJ, Rand EB, Veldtman GR. Fontan-Associated Liver Disease. J Am Coll Cardiol 2017; 70:3173-3194. [DOI: 10.1016/j.jacc.2017.10.045] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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37
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Hays BS, Baker M, Laib A, Tan W, Udholm S, Goldstein BH, Sanders SP, Opotowsky AR, Veldtman GR. Histopathological abnormalities in the central arteries and veins of Fontan subjects. Heart 2017; 104:324-331. [PMID: 28970278 DOI: 10.1136/heartjnl-2017-311838] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/07/2017] [Accepted: 07/23/2017] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE Fontan circulations have obligatory venous hypertension, depressed cardiac output and abnormal arterial elastance. Ventriculovascular coupling is known to be abnormal, but the underlying mechanisms are poorly defined. We aim to describe the histopathological features of vascular remodelling encountered in the central arteries and veins in the Fontan circulation as a possible underlying pathological representation of abnormal ventriculovascular coupling. METHODS Postmortemvasculature (inferior vena cava (IVC), superior vena cava (SVC), pulmonary artery (PA), pulmonary vein (PV) and aorta) of 13 patients with a Fontan circulation (mean age 29.9 years, range 9.0-59.8 years) and 2 biventricular controls (ages 17.9 and 30.2 years) was examined. RESULTS IVC and SVC: Eccentric and variable intimal fibromuscular proliferation occurred in 11 Fontan subjects. There was variable loss of medial smooth muscle bundles with reciprocal replacement with dense collagenous tissue.PA: Similar intimal fibromuscular proliferation was seen; however, these intimal changes were accompanied by medial thinning rather than expansion, medial myxoid degeneration and elastic alteration.PV: The PVs demonstrated intimal fibroproliferation and disorganisation of the muscular media.Aorta: The aortic lamina intima was thickened, with associated fibromuscular proliferation and elasticisation. There was also moderate lymphocytic inflammation in the aortic wall. CONCLUSIONS Vascular architectural remodelling is common in Fontan patients. The central veins demonstrate profound changes of eccentric intimal expansion and smooth muscle replacement with collagen. The pulmonary demonstrated abnormal intimal proliferation, and aortic remodelling was characterised by intima lamina thickening and a moderate degree of aortic wall inflammation.
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Affiliation(s)
- Brandon S Hays
- Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Michael Baker
- Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Division of Pathology, Cincinnati Children's Hospital Medical Centre, Cincinnati, Ohio, USA
| | - Annie Laib
- Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Division of Pathology, Cincinnati Children's Hospital Medical Centre, Cincinnati, Ohio, USA
| | - Wei Tan
- University of Colorado at Boulder, Boulder, Colorado, USA
| | - Sebastian Udholm
- Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Bryan H Goldstein
- Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | | | | | - Gruschen R Veldtman
- Adolescent and Adult Congenital Heart Disease Program, Cincinnati Children's Hospital Medical Centre, Ohio, Cincinnati, USA
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Veldtman GR, Opotowsky AR, Wittekind SG, Rychik J, Penny DJ, Fogel M, Marino BS, Gewillig M. Cardiovascular adaptation to the Fontan circulation. CONGENIT HEART DIS 2017; 12:699-710. [DOI: 10.1111/chd.12526] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 07/17/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Gruschen R. Veldtman
- Adolescent and Adult Congenital Program; Heart Institute, Cincinnati Children's Hospital Medical Centre; Cincinnati Ohio, USA
| | | | - Samuel G. Wittekind
- Adolescent and Adult Congenital Program; Heart Institute, Cincinnati Children's Hospital Medical Centre; Cincinnati Ohio, USA
| | - Jack Rychik
- The Cardiac Center at The Children's Hospital of Philadelphia, Professor of Pediatrics, Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania, USA
| | - Daniel J. Penny
- Department of Cardiology; Texas Children's Hospital and Department of Pediatrics, Baylor College of Medicine; Houston Texas, USA
| | - Mark Fogel
- The Cardiac Center at The Children's Hospital of Philadelphia, Professor of Pediatrics, Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania, USA
| | - Bradley S. Marino
- Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago Illinois, USA
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Ohuchi H, Miyazaki A, Negishi J, Hayama Y, Nakai M, Nishimura K, Ichikawa H, Shiraishi I, Yamada O. Hemodynamic determinants of mortality after Fontan operation. Am Heart J 2017. [PMID: 28625386 DOI: 10.1016/j.ahj.2017.03.020] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Elevated central venous pressure (CVP), low cardiac output, and mild hypoxia are common early and late after Fontan operations. However, the association of these characteristics with late mortality is unclear. We aimed to elucidate the hemodynamic determinants of mortality after Fontan operation. METHOD We evaluated early (group early; 0.5-5years postoperatively, n=387) and late (group late; ≥15years postoperatively, n=161) Fontan hemodynamics that included CVP (mm Hg), cardiac index (CI; L/min per m2), systemic ventricular end-diastolic volume index (mL/m2), ejection fraction (EF; %), and arterial blood oxygen saturation (%). We examined the effect of these variables on 5-year all-cause mortality. RESULTS Mortality was higher in group late than in group early (17 vs 11, P<.0001). In both groups, higher CVP (hazard ratio [HR]1.46 and 1.38, respectively; P<.001-.0001) and lower arterial blood oxygen saturation (HR 1.12, P<.001 for both) were associated with increased mortality. Greater end-diastolic volume index (HR per 20: 1.73) and lower EF (HR per 10%: 3.38) were associated with increased mortality only in group early (P<.0001 for both). In contrast, only in group late was higher CI associated with increased mortality (HR 2.50, 95% CI 1.30-4.55, P<.01). Seven patients in group late with both high CVP (≥14) and CI (≥3.0) had the highest mortality (HR 18.1, 5.55-52.4, P<.0001). CONCLUSIONS Elevated CVP and low arterial blood oxygen saturation correlate with mortality in both early and late Fontan survivors. End-diastolic volume index and EF are associated with mortality only in the earlier cohort, whereas interestingly, elevated cardiac output is associated with increased mortality in the later cohort.
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Affiliation(s)
- Hideo Ohuchi
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan; Department of Adult Congenital Heart Disease, National Cerebral and Cardiovascular Center, Osaka, Japan.
| | - Aya Miyazaki
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Jun Negishi
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Yosuke Hayama
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Michikazu Nakai
- Department of Preventive Medicine and Epidemiologic Informatics, Center for Cerebral and Cardiovascular Center, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Kunihiro Nishimura
- Department of Preventive Medicine and Epidemiologic Informatics, Center for Cerebral and Cardiovascular Center, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Hajime Ichikawa
- Department of Pediatric Cardiovascular Surgery, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Isao Shiraishi
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Osamu Yamada
- Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
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40
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Hasan BS, Lunze FI, Alvi N, Shafer KM, Rhodes J. Feasibility of exercise stress echocardiography and myocardial response in patients with repaired congenital heart disease. Am Heart J 2017; 188:1-10. [PMID: 28577664 DOI: 10.1016/j.ahj.2017.02.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 02/18/2017] [Indexed: 11/17/2022]
Abstract
BACKGROUND Exercise stress echocardiography (ESE) can unmask ventricular dysfunction in asymptomatic patients with congenital heart disease (CHD), but its acquisition and interpretation is often challenging, and the method has not been validated in CHD. This study aimed to evaluate the feasibility of ESE using Doppler imaging and to assess myocardial response to exercise in patients with biventricular (BiV) and univentricular (UniV) circulation after CHD repair. METHODS In this single-center prospective study, we recruited 55 participants (17 females), median age 14 years (8-22 years). Our analysis categorized participants in these three groups: with structurally normal hearts as controls (n=21), with BiV circulation (n=20) and with UniV circulation (n=14). We acquired ESE images of the systemic ventricle including pulsed-wave flow and spectral tissue Doppler imaging (TDI) of lateral free wall before and immediately after standard, symptom-limited exercise tests on an electronically braked cycle ergometer. RESULTS During ESE we obtained inflow E-wave and TDI systolic (S') and early diastolic (E') velocities in 93% to 100% of participants at rest and in 90% to 100% of participants post exercise. Feasibility to obtain Doppler imaging parameter was the same across study groups. The myocardial response to exercise was increase in heart rate (HR), S' and inflow E-wave velocity in all participants. Patients with BiV circulation had preserved ventricular function at rest. While patients with UniV circulation had low S', E', and E-wave velocities at rest in comparison to controls and to BiV group (all P<.001), both patients with BiV and UniV circulation showed significant increases in HR, S' velocity and inflow E-wave velocity post exercise, with magnitudes of these increases higher in controls than in the BiV and UniV group. The S' and E' velocities were strongly associated with lower percent predicted peak oxygen consumption VO2 (rs=0.614 and rs=0.64, respectively, both P<.001). CONCLUSION ESE with Doppler imaging is a practical noninvasive diagnostic method and sufficiently robust for the assessment of morphologic LV/systemic ventricles under exercise in patients after biventricular and univentricular CHD repair. Although patients with BiV and UniV circulation had both preserved myocardial response to exercise, the magnitude of this response was the lowest in patients with UniV circulation.
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Affiliation(s)
- Babar S Hasan
- Department of Pediatrics and Child Health, Aga Khan Medical University, Pakistan.
| | - Fatima I Lunze
- Department of Cardiology Boston Children's Hospital, Harvard Medical School, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Najveen Alvi
- Department of Pediatrics and Child Health, Aga Khan Medical University, Pakistan
| | - Keri M Shafer
- Department of Cardiology Boston Children's Hospital, Harvard Medical School, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Jonathan Rhodes
- Department of Cardiology Boston Children's Hospital, Harvard Medical School, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA
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Watrous RL, Chin AJ. Model-Based Comparison of the Normal and Fontan Circulatory Systems-Part III. World J Pediatr Congenit Heart Surg 2017; 8:148-160. [PMID: 28329460 DOI: 10.1177/2150135116679831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND For patients with the Fontan circulatory arrangement, angiotensin-converting enzyme inhibition, guanylate cyclase activation, phosphodiesterase 5 inhibition, and endothelin receptor antagonism have so far resulted in little or no improvement in [Formula: see text] or peak cardiac index (CI), suggesting that our understanding of the factors that most impact the exercise hemodynamics is incomplete. METHODS To facilitate comparisons with clinical reports of the exercise performance of preadolescent Fontan patients, we rescaled our previously reported computational models of a two-year-old normal child and similarly aged Fontan patient, extended our Fontan model to capture the nonlinear relationship between flow and resistance quantified from previous computational fluid dynamic analyses of the total cavopulmonary connection (TCPC), and added respiration as well as skeletal muscle contraction. RESULTS (1) Without respiration, the computational model for both the normal and the Fontan cannot attain the values for CI at peak exercise reported in the clinical literature, (2) because flow through the TCPC is much greater during inspiration than during expiration, the effect on the CI of the dynamic (flow-related) TCPC resistance is much more dramatic during exercise than it is in breath-hold mode at rest, and (3) coupling breathing with skeletal muscle contraction leads to the highest augmentation of cardiac output, that is, the skeletal muscle pump is most effective when the intrathoracic pressure is at a minimum-at peak inspiration. CONCLUSIONS Novel insights emerge when a Fontan model incorporating dynamic TCPC resistance, full respiration, and skeletal muscle contraction can be compared to the model of the normal.
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Affiliation(s)
- Raymond L Watrous
- 1 Division of Cardiology, Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Alvin J Chin
- 1 Division of Cardiology, Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,2 Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Tang E, Wei ZA, Whitehead KK, Khiabani RH, Restrepo M, Mirabella L, Bethel J, Paridon SM, Marino BS, Fogel MA, Yoganathan AP. Effect of Fontan geometry on exercise haemodynamics and its potential implications. Heart 2017; 103:1806-1812. [PMID: 28522658 DOI: 10.1136/heartjnl-2016-310855] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 03/21/2017] [Accepted: 03/29/2017] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVE Exercise intolerance afflicts Fontan patients with total cavopulmonary connections (TCPCs) causing a reduction in quality of life. Optimising TCPC design is hypothesised to have a beneficial effect on exercise capacity. This study investigates relationships between TCPC geometries and exercise haemodynamics and performance. METHODS This study included 47 patients who completed metabolic exercise stress test with cardiac magnetic resonance (CMR). Phase-contrast CMR images were acquired immediately following supine lower limb exercise. Both anatomies and exercise vessel flow rates at ventilatory anaerobic threshold (VAT) were extracted. The vascular modelling toolkits were used to analyse TCPC geometries. Computational simulations were performed to quantify TCPC indexed power loss (iPL) at VAT. RESULTS A highly significant inverse correlation was found between the TCPC diameter index, which factors in the narrowing of TCPC vessels, with iPL at VAT (r=-0.723, p<0.001) but positive correlations with exercise performance variables, including minute oxygen consumption (VO2) at VAT (r=0.373, p=0.01), VO2 at peak exercise (r=0.485, p=0.001) and work at VAT/weight (r=0.368, p=0.01). iPL at VAT was negatively correlated with VO2 at VAT (r=-0.337, p=0.02), VO2 at peak exercise (r=-0.394, p=0.007) and work at VAT/weight (r=-0.208, p=0.17). CONCLUSIONS Eliminating vessel narrowing in TCPCs and reducing elevated iPL at VAT could enhance exercise tolerance for patients with TCPCs. These findings could help plan surgical or catheter-based strategies to improve patients' exercise capacity.
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Affiliation(s)
- Elaine Tang
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Zhenglun Alan Wei
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Kevin K Whitehead
- Division of Cardiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Reza H Khiabani
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Maria Restrepo
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Lucia Mirabella
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | | | - Stephen M Paridon
- Division of Cardiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Bradley S Marino
- Division of Cardiology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
| | - Mark A Fogel
- Division of Cardiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Ajit P Yoganathan
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA.,Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
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43
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Legendre A, Guillot A, Ladouceur M, Bonnet D. Usefulness of stroke volume monitoring during upright ramp incremental cycle exercise in young patients with Fontan circulation. Int J Cardiol 2017; 227:625-630. [DOI: 10.1016/j.ijcard.2016.10.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 10/28/2016] [Indexed: 11/24/2022]
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Goldstein BH, Urbina EM, Khoury PR, Gao Z, Amos MA, Mays WA, Redington AN, Marino BS. Endothelial Function and Arterial Stiffness Relate to Functional Outcomes in Adolescent and Young Adult Fontan Survivors. J Am Heart Assoc 2016; 5:JAHA.116.004258. [PMID: 27664807 PMCID: PMC5079057 DOI: 10.1161/jaha.116.004258] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Background Fontan survivors demonstrate diminished vascular function and functional outcomes, but the relationships between these measures have not been established. Methods and Results We performed a cross‐sectional study of 60 Fontan survivors (52% male) with a mean age of 13.9±4.1 years and mean Fontan duration of 9.9±4.2 years. Multimodality assessment of endothelial function (reactive hyperemia index and flow‐mediated dilation) and arterial stiffness (augmentation index and baseline pulse amplitude) was performed with peripheral arterial tonometry and brachial flow‐mediated dilation. Aerobic capacity was determined using cardiopulmonary exercise testing; mean peak and percentage of predicted oxygen consumption (VO2) were 27.8±7.6 mL/kg per minute and 71.0±21.2%, respectively. Quality of life and physical activity were assessed using the Pediatric Quality of Life Inventory (PedsQL) and the Physical Activity Questionnaire. Vascular measures served as predictor variables, whereas functional measures served as outcome variables. In all cases, worse vascular measures were associated with worse functional measures. Flow‐mediated dilation–derived reactive hyperemia index (P<0.05) was positively associated with VO2 at anaerobic threshold. Peripheral arterial tonometry–derived baseline pulse amplitude (P<0.05) was negatively associated with the ratio of minute ventilation to carbon dioxide at anaerobic threshold. Flow‐mediated dilation–derived reactive hyperemia index and peripheral arterial tonometry–derived augmentation index (P<0.05) were positively and negatively associated, respectively, with peak VO2. Maximum flow‐mediated dilation (P<0.05) was positively associated with Physical Activity Questionnaire score. Peripheral arterial tonometry–derived augmentation index and baseline pulse amplitude (P<0.05) were negatively associated with parent‐reported PedsQL total and physical heath summary scores. Conclusions Increased arterial stiffness and decreased endothelial function are associated with lower aerobic capacity, physical activity, and quality of life in adolescent and young adult Fontan survivors. Understanding the cause–effect relationship between vascular function and functional outcomes is an important next step.
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Affiliation(s)
- Bryan H Goldstein
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Elaine M Urbina
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Philip R Khoury
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Zhiqian Gao
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Michelle A Amos
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Wayne A Mays
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Andrew N Redington
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Bradley S Marino
- Division of Cardiology, Northwestern University Feinberg School of Medicine and Lurie Children's Hospital, Chicago, IL
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Hebson C, Book W, Elder RW, Ford R, Jokhadar M, Kanter K, Kogon B, Kovacs AH, Levit RD, Lloyd M, Maher K, Reshamwala P, Rodriguez F, Romero R, Tejada T, Marie Valente A, Veldtman G, McConnell M. “Frontiers in Fontan failure: A summary of conference proceedings”. CONGENIT HEART DIS 2016; 12:6-16. [DOI: 10.1111/chd.12407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 07/24/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Camden Hebson
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
- Division of Pediatric Cardiology; Department of Pediatrics, Emory University; Atlanta GA
| | - Wendy Book
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
| | - Robert W. Elder
- Division of Cardiology; Department of Medicine, Yale University; New Haven CT
| | - Ryan Ford
- Division of Gastroenterology; Department of Medicine, Emory University; Atlanta GA
| | - Maan Jokhadar
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
| | - Kirk Kanter
- Division of Cardiothoracic Surgery; Department of Surgery, Emory University; Atlanta GA
| | - Brian Kogon
- Division of Cardiothoracic Surgery; Department of Surgery, Emory University; Atlanta GA
| | - Adrienne H. Kovacs
- Division of Cardiology; Department of Medicine, Oregon Health and Science University; Portland OR
| | - Rebecca D. Levit
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
| | - Michael Lloyd
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
| | - Kevin Maher
- Division of Pediatric Cardiology; Department of Pediatrics, Emory University; Atlanta GA
| | - Preeti Reshamwala
- Division of Gastroenterology; Department of Medicine, Emory University; Atlanta GA
| | - Fred Rodriguez
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
- Division of Pediatric Cardiology; Department of Pediatrics, Emory University; Atlanta GA
| | - Rene Romero
- Division of Pediatric Gastroenterology; Department of Pediatrics, Emory University; Atlanta GA
| | - Thor Tejada
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
| | - Anne Marie Valente
- Division of Cardiology; Department of Medicine, Harvard University; Boston MA
| | - Gruschen Veldtman
- Division of Pediatric Cardiology; Department of Pediatrics, University of Cincinnati; Cincinnati OH
| | - Michael McConnell
- Division of Cardiology; Department of Medicine, Emory University; Atlanta GA
- Division of Pediatric Cardiology; Department of Pediatrics, Emory University; Atlanta GA
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Exercise-Induced Systemic Venous Hypertension in the Fontan Circulation. Am J Cardiol 2016; 117:1667-1671. [PMID: 27032711 DOI: 10.1016/j.amjcard.2016.02.042] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 02/18/2016] [Accepted: 02/18/2016] [Indexed: 01/25/2023]
Abstract
Increasingly end-organ injury is being demonstrated late after institution of the Fontan circulation, particularly liver fibrosis and cirrhosis. The exact mechanisms for these late phenomena remain largely elusive. Hypothesizing that exercise induces precipitous systemic venous hypertension and insufficient cardiac output for the exercise demand, that is, a possible mechanism for end-organ injury, we sought to demonstrate the dynamic exercise responses in systemic venous perfusion (SVP) and concurrent end-organ perfusion. Ten stable Fontan patients and 9 control subjects underwent incremental cycle ergometry-based cardiopulmonary exercise testing. SVP was monitored in the right upper limb, and regional tissue oxygen saturation was monitored in the brain and kidney using near-infrared spectroscopy. SVP rose profoundly in concert with workload in the Fontan group, described by the regression equation 15.97 + 0.073 watts per mm Hg. In contrast, SVP did not change in healthy controls. Regional renal (p <0.01) and cerebral tissue saturations (p <0.001) were significantly lower and decrease more rapidly in Fontan patients. We conclude that in a stable group of adult patients with Fontan circulation, high-intensity exercise was associated with systemic venous hypertension and reduced systemic oxygen delivery. This physiological substrate has the potential to contribute to end-organ injury.
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Averin K, Hirsch R, Seckeler MD, Whiteside W, Beekman RH, Goldstein BH. Diagnosis of occult diastolic dysfunction late after the Fontan procedure using a rapid volume expansion technique. Heart 2016; 102:1109-14. [DOI: 10.1136/heartjnl-2015-309042] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 02/04/2016] [Indexed: 11/04/2022] Open
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Bossers S, Kapusta L, Kuipers I, van Iperen G, Moelker A, Kroft L, Romeih S, de Rijke Y, ten Harkel A, Helbing W. Ventricular function and cardiac reserve in contemporary Fontan patients. Int J Cardiol 2015; 196:73-80. [DOI: 10.1016/j.ijcard.2015.05.181] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 05/13/2015] [Accepted: 05/26/2015] [Indexed: 11/15/2022]
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Riveros R, Riveros-Perez E. Perioperative Considerations for Children With Right Ventricular Dysfunction and Failing Fontan. Semin Cardiothorac Vasc Anesth 2015; 19:187-202. [PMID: 26287019 DOI: 10.1177/1089253215593178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The survival of patients with congenital heart diseases (CHD) has increased in the past decades, resulting in the identification of new characteristics of chronic comorbidities observed in pediatric and adults with CHD. Patients with CHD can present with a broad clinical spectrum of manifestations of congestive heart failure (CHF) at any point throughout their lives that may be related to anatomical or surgical variables. This article focuses on the perioperative assessment of patients with CHD and CHF, with an emphasis on pathophysiologic, diagnostic, and therapeutic alternatives in patients with right ventricular failure and failing Fontan circulation. We also provide descriptions of the effects of sedatives and anesthetics commonly used in this population in diagnostic or invasive procedures.
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50
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Pushparajah K, Wong JK, Bellsham-Revell HR, Hussain T, Valverde I, Bell A, Tzifa A, Greil G, Simpson JM, Kutty S, Razavi R. Magnetic resonance imaging catheter stress haemodynamics post-Fontan in hypoplastic left heart syndrome. Eur Heart J Cardiovasc Imaging 2015; 17:644-51. [PMID: 26188193 DOI: 10.1093/ehjci/jev178] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 06/18/2015] [Indexed: 11/13/2022] Open
Abstract
AIMS Exercise limitation is common post-Fontan. Hybrid X-ray and magnetic resonance imaging (XMR) catheterization allows haemodynamic assessment by means of measurement of ventricular volumes and flow in major vessels with simultaneous invasive pressures. We aim to assess haemodynamic response to stress in patients with hypoplastic left heart syndrome (HLHS) post-Fontan. METHODS AND RESULTS Prospective study of 13 symptomatic children (NHYA 2) with HLHS post-Fontan using XMR catheterization. Three conditions were applied: baseline (Stage 1), dobutamine at 10 µg/kg/min (Stage 2), and dobutamine at 20 µg/kg/min (Stage 3). Seven consecutive patients received inhaled nitric oxide (iNO) at peak stress. Control MRI data were from normal healthy adults. In the HLHS patients, baseline mean pulmonary vascular resistance (PVR) was 1.51 ± 0.59 WU m(2) and aortopulmonary collateral flow was 17.7 ± 13.6% of systemic cardiac output. Mean right ventricular end-diastolic pressure was 6.7 ± 2.5 mmHg which did not rise with stress. Cardiac index (CI) increased at Stage 2 in HLHS (40%) and controls (61%) but continued to increase at Stage 3 only in controls (19%) but not in HLHS. The blunted rise in CI in HLHS was due to a continuing fall in end-diastolic volume throughout stress, with no significant change in PVR or CI at peak stress in response to iNO. CONCLUSION Cardiac output post-Fontan in HLHS at peak stress is blunted due to a limitation in preload which is not responsive to inhaled pulmonary vasodilators in the setting of normal PVR.
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Affiliation(s)
- Kuberan Pushparajah
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - James K Wong
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Hannah R Bellsham-Revell
- Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Tarique Hussain
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Israel Valverde
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Aaron Bell
- Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Aphrodite Tzifa
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Gerald Greil
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - John M Simpson
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Shelby Kutty
- University of Nebraska/Creighton University Joint Division of Pediatric Cardiology, Omaha, NE, USA
| | - Reza Razavi
- Division of Imaging Sciences, King's College London BHF Centre, NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK Paediatric Cardiovascular Sciences, Rayne Institute, King's College London and Evelina London Children's Hospital, Westminster Bridge Road, London SE1 7EH, UK
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