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van der Palen RLF, Juffermans JF, Kroft LJM, Hazekamp MG, Lamb HJ, Blom NA, Roest AAW, Westenberg JJM. Wall shear stress in the thoracic aorta at rest and with dobutamine stress after arterial switch operation. Eur J Cardiothorac Surg 2021; 59:814-822. [PMID: 33382414 PMCID: PMC8083947 DOI: 10.1093/ejcts/ezaa392] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/09/2020] [Accepted: 09/24/2020] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES Progressive root dilatation is an important complication in patients with transposition of the great arteries (TGA) after arterial switch operation (ASO) that may be caused by altered flow dynamics. Aortic wall shear stress (WSS) distribution at rest and under dobutamine stress (DS) conditions using 4D flow magnetic resonance imaging were investigated in relation to thoracic aorta geometry. METHODS 4D flow magnetic resonance imaging was performed in 16 adolescent TGA patients after ASO (rest and DS condition) and in 10 healthy controls (rest). The primary outcome measure was the WSS distribution along the aortic segments and the WSS change with DS in TGA patients. Based on the results, we secondary zoomed in on factors [aortic geometry and left ventricular (LV) function parameters] that might relate to these WSS distribution differences. Aortic diameters, arch angle, LV function parameters (stroke volume, LV ejection fraction, cardiac output) and peak systolic aortic WSS were obtained. RESULTS TGA patients had significantly larger neoaortic root and smaller mid-ascending aorta (AAo) dimensions and aortic arch angle. At rest, patients had significantly higher WSS in the entire thoracic aorta, except for the dilated root. High WSS levels beyond the proximal AAo were associated with the diameter decrease from the root to the mid-AAo (correlation coefficient r = 0.54–0.59, P = 0.022–0.031), not associated with the aortic arch angle. During DS, WSS increased in all aortic segments (P < 0.001), most pronounced in the AAo segments. The increase in LV ejection fraction, stroke volume and cardiac output as a result of DS showed a moderate linear relationship with the WSS increase in the distal AAo (correlation coefficient r = 0.54–0.57, P = 0.002–0.038). CONCLUSIONS Increased aortic WSS was observed in TGA patients after ASO, related to the ASO-specific geometry, which increased with DS. Stress-enhanced elevated WSS may play a role in neoaortic root dilatation and anterior aortic wall thinning of the distal AAo.
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Affiliation(s)
- Roel L F van der Palen
- Division of Pediatric Cardiology, Department of Pediatrics, Leiden University Medical Center, Leiden, Netherlands
| | - Joe F Juffermans
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Lucia J M Kroft
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Mark G Hazekamp
- Department of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, Netherlands
| | - Hildo J Lamb
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Nico A Blom
- Division of Pediatric Cardiology, Department of Pediatrics, Leiden University Medical Center, Leiden, Netherlands
| | - Arno A W Roest
- Division of Pediatric Cardiology, Department of Pediatrics, Leiden University Medical Center, Leiden, Netherlands
| | - Jos J M Westenberg
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
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2
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van den Bosch E, Cuypers JAAE, Luijnenburg SE, Duppen N, Boersma E, Budde RPJ, Krestin GP, Blom NA, Breur HMPJ, Snoeren MM, Roos-Hesselink JW, Kapusta L, Helbing WA. Ventricular response to dobutamine stress cardiac magnetic resonance imaging is associated with adverse outcome during 8-year follow-up in patients with repaired Tetralogy of Fallot. Eur Heart J Cardiovasc Imaging 2020; 21:1039-1046. [PMID: 31596460 PMCID: PMC7440962 DOI: 10.1093/ehjci/jez241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 08/16/2019] [Accepted: 09/06/2019] [Indexed: 11/15/2022] Open
Abstract
AIMS The aim of this study was to evaluate the possible value of dobutamine stress cardiac magnetic resonance imaging (CMR) to predict adverse outcome in Tetralogy of Fallot (TOF) patients. METHODS AND RESULTS In previous prospective multicentre studies, TOF patients underwent low-dose dobutamine stress CMR (7.5 µg/kg/min). Subsequently, during regular-care patient follow-up, patients were assessed for reaching the composite endpoint (cardiac death, arrhythmia-related hospitalization, or cardioversion/ablation, VO2 max ≤65% of predicted). A normal stress response was defined as a decrease in end-systolic volume (ESV) and increase in ejection fraction. The relative parameter change during stress was calculated as relative parameter change = [(parameterstress - parameterrest)/parameterrest] * 100. The predictive value of dobutamine stress CMR for the composite endpoint was determined using time-to-event analyses (Kaplan-Meier) and Cox proportional hazard analysis. We studied 100 patients [67 (67%) male, median age at baseline CMR 17.8 years (interquartile range 13.5-34.0), age at TOF repair 0.9 years (0.6-2.1)]. After a median follow-up of 8.6 years (6.7-14.1), 10 patients reached the composite endpoint. An abnormal stress response (30% vs. 4.4%, P = 0.021) was more frequently observed in composite endpoint patients. Also in endpoint patients, the relative decrease in right ventricular ESV decreased less during stress compared with the patients without an endpoint (-17 ± 15 vs. -26 ± 13 %, P = 0.045). Multivariable analyses identified an abnormal stress response (hazard ratio 10.4; 95% confidence interval 2.5-43.7; P = 0.001) as predictor for the composite endpoint. CONCLUSION An abnormal ventricular response to dobutamine stress is associated with adverse outcome in patients with repaired TOF.
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Affiliation(s)
- Eva van den Bosch
- Division of Pediatric Cardiology, Department of Pediatrics, Erasmus University Medical Center, Doctor Molewaterplein 40, 3000 CM Rotterdam, The Netherlands.,Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands.,Netherlands Heart Institute, Moreelsepark 1, 3511 EP Utrecht, The Netherlands
| | - Judith A A E Cuypers
- Department of Cardiology, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Saskia E Luijnenburg
- Division of Pediatric Cardiology, Department of Pediatrics, Erasmus University Medical Center, Doctor Molewaterplein 40, 3000 CM Rotterdam, The Netherlands.,Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Nienke Duppen
- Division of Pediatric Cardiology, Department of Pediatrics, Erasmus University Medical Center, Doctor Molewaterplein 40, 3000 CM Rotterdam, The Netherlands.,Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Eric Boersma
- Department of Cardiology, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Ricardo P J Budde
- Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Gabriel P Krestin
- Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Nico A Blom
- Division of Pediatric Cardiology, Department of Pediatrics, Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.,Division of Pediatric Cardiology, Department of Pediatrics, Leiden University Medical Center, Albinusdreef 2, 2300 RC Leiden, The Netherlands
| | - Hans M P J Breur
- Division of Pediatric Cardiology, Department of Pediatrics, University Medical Centre Utrecht, Lundlaan 6, 3508 AB Utrecht, The Netherlands
| | - Miranda M Snoeren
- Department of Radiology, Radboud University Medical Center, Geert Grooteplein 10, 6500 HB Nijmegen, The Netherlands
| | - Jolien W Roos-Hesselink
- Department of Cardiology, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Livia Kapusta
- Division of Pediatric Cardiology, Department of Pediatrics, Tel Aviv Sourasky Medical Centre, Sackler School of Medicine, Tel Aviv University, Weizmann street, 64239 Tel Aviv, Israel.,Division of Pediatric Cardiology, Department of Pediatrics, Radboud University Medical Center, Geert Grooteplein 10, 6500 HB Nijmegen, The Netherlands
| | - Willem A Helbing
- Division of Pediatric Cardiology, Department of Pediatrics, Erasmus University Medical Center, Doctor Molewaterplein 40, 3000 CM Rotterdam, The Netherlands.,Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands.,Division of Pediatric Cardiology, Department of Pediatrics, Radboud University Medical Center, Geert Grooteplein 10, 6500 HB Nijmegen, The Netherlands
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3
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Ferguson ME, Sachdeva R, Gillespie SE, Morrow G, Border W. Tissue Doppler imaging during exercise stress echocardiography demonstrates a mechanism for impaired exercise performance in children with hypertrophic cardiomyopathy. Echocardiography 2016; 33:1718-1725. [DOI: 10.1111/echo.13316] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- Matthew Eric Ferguson
- Sibley Heart Center/Children's Healthcare of Atlanta; Emory University; Atlanta Georgia
| | - Ritu Sachdeva
- Sibley Heart Center/Children's Healthcare of Atlanta; Emory University; Atlanta Georgia
| | - Scott E. Gillespie
- Department of Pediatrics; Emory University School of Medicine; Atlanta Georgia
| | - Gemma Morrow
- Children's Healthcare of Atlanta; Atlanta Georgia
| | - William Border
- Sibley Heart Center/Children's Healthcare of Atlanta; Emory University; Atlanta Georgia
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4
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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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Plana JC, Galderisi M, Barac A, Ewer MS, Ky B, Scherrer-Crosbie M, Ganame J, Sebag IA, Agler DA, Badano LP, Banchs J, Cardinale D, Carver J, Cerqueira M, DeCara JM, Edvardsen T, Flamm SD, Force T, Griffin BP, Jerusalem G, Liu JE, Magalhães A, Marwick T, Sanchez LY, Sicari R, Villarraga HR, Lancellotti P. Expert consensus for multimodality imaging evaluation of adult patients during and after cancer therapy: a report from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. Eur Heart J Cardiovasc Imaging 2014; 15:1063-93. [PMID: 25239940 PMCID: PMC4402366 DOI: 10.1093/ehjci/jeu192] [Citation(s) in RCA: 631] [Impact Index Per Article: 63.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | - Ana Barac
- Medstar Washington Hospital Center, Washington, District of Columbia
| | - Michael S Ewer
- MD Anderson Cancer Center, University of Texas, Houston, Texas
| | - Bonnie Ky
- University of Pennsylvania, Philadelphia, Pennsylvania
| | | | | | - Igal A Sebag
- Jewish General Hospital and McGill University, Montreal, Quebec, Canada
| | | | | | - Jose Banchs
- MD Anderson Cancer Center, University of Texas, Houston, Texas
| | | | - Joseph Carver
- Abramson Cancer Center at the University of Pennsylvania, Philadelphia, Pennsylvania
| | | | | | - Thor Edvardsen
- Oslo University Hospital and University of Oslo, Oslo, Norway
| | | | | | | | | | - Jennifer E Liu
- Memorial Sloan-Kettering Cancer Center, New York, New York
| | | | | | - Liza Y Sanchez
- MD Anderson Cancer Center, University of Texas, Houston, Texas
| | - Rosa Sicari
- CNR Institute of Clinical Physiology, Pisa, Italy
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Plana JC, Galderisi M, Barac A, Ewer MS, Ky B, Scherrer-Crosbie M, Ganame J, Sebag IA, Agler DA, Badano LP, Banchs J, Cardinale D, Carver J, Cerqueira M, DeCara JM, Edvardsen T, Flamm SD, Force T, Griffin BP, Jerusalem G, Liu JE, Magalhães A, Marwick T, Sanchez LY, Sicari R, Villarraga HR, Lancellotti P. Expert consensus for multimodality imaging evaluation of adult patients during and after cancer therapy: a report from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. J Am Soc Echocardiogr 2014; 27:911-39. [PMID: 25172399 DOI: 10.1016/j.echo.2014.07.012] [Citation(s) in RCA: 874] [Impact Index Per Article: 87.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | | | - Ana Barac
- Medstar Washington Hospital Center, Washington, District of Columbia
| | - Michael S Ewer
- MD Anderson Cancer Center, University of Texas, Houston, Texas
| | - Bonnie Ky
- University of Pennsylvania, Philadelphia, Pennsylvania
| | | | | | - Igal A Sebag
- Jewish General Hospital and McGill University, Montreal, Quebec, Canada
| | | | | | - Jose Banchs
- MD Anderson Cancer Center, University of Texas, Houston, Texas
| | | | - Joseph Carver
- Abramson Cancer Center at the University of Pennsylvania, Philadelphia, Pennsylvania
| | | | | | - Thor Edvardsen
- Oslo University Hospital and University of Oslo, Oslo, Norway
| | | | | | | | | | - Jennifer E Liu
- Memorial Sloan-Kettering Cancer Center, New York, New York
| | | | | | - Liza Y Sanchez
- MD Anderson Cancer Center, University of Texas, Houston, Texas
| | - Rosa Sicari
- CNR Institute of Clinical Physiology, Pisa, Italy
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7
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Impaired cardiac reserve in asymptomatic patients with moderate pulmonary restenosis late after relief of severe pulmonary stenosis: Evidence for diastolic dysfunction. Int J Cardiol 2013; 167:2836-40. [DOI: 10.1016/j.ijcard.2012.07.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 07/20/2012] [Accepted: 07/21/2012] [Indexed: 11/21/2022]
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8
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Affiliation(s)
- Melanie Nies
- Johns Hopkins Medical Institution, Bloomberg Children's Center, Department of Pediatric Cardiology/Taussig Heart Center, 1800 Orleans Street, M2303, Baltimore, MD 21230, USA.
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9
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Diagnosis of cardiotoxicity: role of conventional and advanced cardiovascular imaging. J Cardiovasc Echogr 2011. [DOI: 10.1016/j.jcecho.2011.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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10
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De Caro E, Smeraldi A, Trocchio G, Calevo M, Hanau G, Pongiglione G. Subclinical cardiac dysfunction and exercise performance in childhood cancer survivors. Pediatr Blood Cancer 2011; 56:122-6. [PMID: 21058389 DOI: 10.1002/pbc.22606] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Although anthracycline cardiotoxicity is clearly related to the cumulative dose administered, subclinical cardiac dysfunction has been reported across a wide range of treatment regimens, and its clinical significance is still unclear. Purpose of this study is to investigate by exercise echocardiography for subclinical cardiac dysfunction in survivors of pediatric cancer treated with low-moderate anthracycline doses, and to evaluate whether it may alter the response of the cardiovascular system to dynamic exercise. PROCEDURE Post-exercise left ventricular end-systolic wall stress (ESS), left ventricular posterior wall dimension and percent thickening at end systole, and cardiopulmonary exercise test-derived indexes of cardiac function were examined in 55 apparently healthy patients (mean age 13.5 ± 2.9 years, median anthracycline cumulative dose 240 mg/m(2)) and in 63 controls. RESULTS Subclinical cardiac dysfunction was identified in 17 patients (30%) presenting reduced left ventricular posterior wall dimension or percent thickening, or increased values of left ventricular ESS as compared to controls (group A), while the remaining patients formed group B. Reduced oxygen consumption at peak exercise in both groups of patients was the only cardiopulmonary exercise test variable resulting significantly different between patients and controls: no differences were found among the groups of patients. CONCLUSIONS Our results confirm that even patients treated with a median anthracycline dose of 240 mg/m(2) (range 100-490) are at considerable risk of exhibiting subclinical cardiac dysfunction that, however, does not seem to alter the physiologic response of the cardiovascular system to dynamic exercise.
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Affiliation(s)
- Enrico De Caro
- Department of Cardiology, Giannina Gaslini Children's Hospital, Genova, Italy
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Abstract
PURPOSE OF REVIEW Heart failure is an important problem after surgical correction of congenital heart disease. Timely recognition may be difficult. Recent developments in exercise testing and stress-imaging may change the management of patients with congenital heart disease. RECENT FINDINGS Exercise tests are commonly used in the follow-up of patients with congenital heart disease. Maximal exercise studies are not always feasible in this patient population. Variables of submaximal exercise and ventilator efficiency have shown a good correlation with variables of maximal exercise and have been suggested to relate to long-term cardiac function.For evaluation of submaximal exercise, stress imaging may reveal abnormal responses unrecognized at rest. Both physical exercise as well as pharmacological stress may be used in combination with various imaging modalities. For practical reasons, dobutamine is most widely used to generate and mimic stress and is well tolerated in low doses. Particularly in lesions affecting the right ventricle and with single ventricular physiology after the Fontan operation, magnetic resonance stress imaging has provided additional insight into the cardiac function. SUMMARY The abnormal stress responses can potentially be used for risk assessment in the follow-up of patients with congenital cardiac disease. Further studies are required to provide common protocols for stress imaging.
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12
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What Limits Cardiac Performance during Exercise in Normal Subjects and in Healthy Fontan Patients? Int J Pediatr 2010; 2010. [PMID: 20871839 PMCID: PMC2943078 DOI: 10.1155/2010/791291] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 05/11/2010] [Accepted: 07/27/2010] [Indexed: 11/17/2022] Open
Abstract
Exercise is an important determinant of health but is significantly reduced in the patient with a univentricular circulation. Normal exercise physiology mandates an increase in pulmonary artery pressures which places an increased work demand on the right ventricle (RV). In a biventricular circulation with pathological increases in pulmonary vascular resistance and/or reductions in RV function, exercise-induced augmentation of cardiac output is limited. Left ventricular preload reserve is dependent upon flow through the pulmonary circulation and this requires adequate RV performance. In the Fontan patient, the reasons for exercise intolerance are complex. In those patients with myocardial dysfunction or other pathologies of the circulatory components, it is likely that these abnormalities serve as a limitation to cardiac performance during exercise. However, in the healthy Fontan patient, it may be the absence of a sub-pulmonary pump which limits normal increases in pulmonary pressures, trans-pulmonary flow requirements and cardiac output. If so, performance will be exquisitely dependent on pulmonary vascular resistance. This provides a potential explanation as to why pulmonary vasodilators may improve exercise tolerance. As has recently been demonstrated, these agents may offer an important new treatment strategy which directly addresses the physiological limitations in the Fontan patient.
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13
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Sieswerda E, Kremer LCM, Vidmar S, De Bruin ML, Smibert E, Sjöberg G, Cheung MMH, Weintraub RG. Exercise echocardiography in asymptomatic survivors of childhood cancer treated with anthracyclines: a prospective follow-up study. Pediatr Blood Cancer 2010; 54:579-84. [PMID: 20014238 DOI: 10.1002/pbc.22371] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Exercise echocardiography reveals abnormalities in asymptomatic childhood cancer survivors who previously have been treated with anthracyclines. We determined the added value of monitoring childhood cancer survivors with exercise echocardiography compared to monitoring with resting echocardiography alone to predict anthracycline-induced cardiotoxicity. Secondary aims were to evaluate change in resting cardiac function over 10 years and to determine risk factors for late cardiotoxicity. PROCEDURE We invited a cohort of 110 originally asymptomatic anthracycline-treated childhood cancer survivors, who had undergone cardiac tests including exercise echocardiography 10.5 years earlier, for new cardiac evaluation. Each subject underwent a resting echocardiogram at both evaluations. At first evaluation a repeat echocardiogram was performed following peak exercise. Resting echocardiographic parameters were converted to z-character. RESULTS Ninety-two of 110 survivors (mean anthracycline dose 307 mg/m(2), mean follow-up time from start of treatment 8.2 years at first and 18.8 years at second evaluation) were evaluated prospectively. Mean resting fractional shortening z-character (RFSz) decreased from -0.18 to -0.93. Higher cumulative anthracycline dose was a risk factor for a lower RFSz at late follow-up (P = 0.0002). Adding exercise fractional shortening (XFS) to a model containing RFSz did not improve prediction of abnormal RFSz at late follow-up. CONCLUSIONS Monitoring with exercise echocardiography has no added value to monitoring with resting echocardiography alone in predicting late anthracycline-induced cardiotoxicity in childhood cancer survivors. RFSz deteriorates over time, even in originally asymptomatic patients. Previous treatment with higher cumulative anthracycline dose is the main risk factor for a lower RFSz at late follow-up.
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Affiliation(s)
- Elske Sieswerda
- Department of Pediatric Oncology, Emma Children's Hospital/Academic Medical Center, Amsterdam, the Netherlands.
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14
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Abstract
In patients with coronary arterial disease, stress imaging is able to demonstrate abnormalities in the motion of the ventricular walls, and abnormalities in coronary arterial perfusion not apparent at rest. It can also provide information on prognostic factors. In patients with congenitally malformed hearts, stress imaging is used to determine contractile reserve, abnormalities of mural motion, and global systolic function, but also to assess diastolic and vascular function. In most of these patients, stress is usually induced using pharmacological agents, mainly dobutamine given in varying doses. The clinical usefulness of abnormal responses to the stress induced in such patients has to be addressed in follow-up studies. The abnormal stress might serve as surrogate endpoints, predicting primary endpoints at an early stage, which are useful for stratification of risk in this population of growing patients. We review here the stress imaging studies performed to date in patients with congenitally malformed hearts, with a special emphasis on echocardiography and cardiac magnetic resonance imaging.
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15
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Robbers-Visser D, Luijnenburg SE, van den Berg J, Roos-Hesselink JW, Strengers JL, Kapusta L, Moelker A, Helbing WA. Safety and observer variability of cardiac magnetic resonance imaging combined with low-dose dobutamine stress-testing in patients with complex congenital heart disease. Int J Cardiol 2009; 147:214-8. [PMID: 19740557 DOI: 10.1016/j.ijcard.2009.08.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Revised: 08/08/2009] [Accepted: 08/16/2009] [Indexed: 01/02/2023]
Abstract
BACKGROUND In patients with complex congenital heart disease (CHD) abnormal ventricular stress responses have been reported with dobutamine stress cardiovascular magnetic resonance (DCMR). These abnormal stress responses are potential indicators of long-term outcome. However, safety and reproducibility of this technique has not been reported in a larger study. The aim of this study was to report our experiences regarding safety and intra-observer and inter-observer variability of low-dose DCMR in complex CHD. METHODS In 91 patients, 110 low-dose DCMR studies were performed with acquisition of a short axis set at rest, and during dobutamine administration (7.5 μg/kg/min maximum). We assessed biventricular end-diastolic volumes, end-systolic volumes, stroke volumes, ejection fraction and ventricular mass. Intra- and inter-observer variability for all variables was assessed by calculating the coefficient of variation (%), i.e. the standard deviation of the difference divided by the mean of 2 measurements multiplied by 100%. RESULTS In 3 patients minor side effects occurred (vertigo, headache, and bigeminy). Ten patients experienced an increase in heart rate of >150% from baseline, although well tolerated. For all variables, intra-observer variability was <10% at rest and during stress. At rest, inter-observer variability was 10.5% maximal. With stress-testing, only the variability of biventricular end-systolic volumes (ESV) exceeded 10%. CONCLUSIONS In patients with complex CHD low-dose DCMR is feasible, and safe. Intra-observer variability is low for rest and stress measurements. Inter-observer variability of biventricular ESV is high with stress-testing. Whether this limits the potential usefulness of DCMR for risk assessment during follow-up has to be assessed.
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Affiliation(s)
- Daniëlle Robbers-Visser
- Department of Paediatrics, Division of Cardiology, Erasmus MC - Sophia Children's Hospital, Rotterdam, The Netherlands
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16
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Abstract
Anthracyclines are potent chemotherapeutic agents associated with 3 different forms of cardiomyopathy. Acute cardiomyopathy is seen within 3 months of drug exposure and may take the form of either a reversible myocarditis and pericarditis or an early-onset type and a late-onset type of chronic cardiomyopathy. Chronic anthracycline-induced cardiomyopathy is treated similarly to ischemic cardiomyopathies with beta-blockade and angiotensin-converting enzyme (ACE) inhibition. This review focuses on recent research regarding mechanisms of anthracycline-induced myocardial damage, the noninvasive imaging diagnosis of anthracycline-induced cardiomyopathy, and potential areas of future research regarding genetic screening and selecting individuals at increased risk, with consideration of prophylactic treatment with medications, specifically carvedilol and ACE inhibitors.
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Affiliation(s)
- Ashley Simmons
- Division of Cardiovascular Diseases, University of Kansas School of Medicine, Kansas City, KS 66160, USA
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17
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Robbers-Visser D, Helderman F, Strengers JL, van Osch-Gevers L, Kapusta L, Pattynama PM, Bogers AJ, Krams R, Helbing WA. Pulmonary artery size and function after Fontan operation at a young age. J Magn Reson Imaging 2008; 28:1101-7. [DOI: 10.1002/jmri.21544] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Robbers-Visser D, Jan ten Harkel D, Kapusta L, Strengers JL, Dalinghaus M, Meijboom FJ, Pattynama PM, Bogers AJ, Helbing WA. Usefulness of cardiac magnetic resonance imaging combined with low-dose dobutamine stress to detect an abnormal ventricular stress response in children and young adults after fontan operation at young age. Am J Cardiol 2008; 101:1657-62. [PMID: 18489947 DOI: 10.1016/j.amjcard.2008.01.050] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Revised: 01/28/2008] [Accepted: 01/28/2008] [Indexed: 10/22/2022]
Abstract
After Fontan operation, patients are limited in increasing cardiac output and in exercise capacity. This has been related to impaired preload or other factors leading to decreased global ventricular performance with stress. To study these factors, the stress responses of functionally univentricular hearts were assessed at rest and during low-dose dobutamine stress using cardiovascular magnetic resonance imaging. Thirty-two patients after Fontan completion at young age were included (27 with total cavopulmonary connection, 5 with atriopulmonary connection; mean age 13.3 years, range 7.5 to 22.2; 23 male patients; median follow-up after Fontan operation 8.1 years, range 5.2 to 17.8). A multiphase short-axis stack of 10 to 12 contiguous slices of the systemic ventricle was obtained at rest and during low-dose dobutamine stress cardiovascular magnetic resonance imaging (maximum 7.5 microg/kg/min). With stress-testing, heart rate, ejection fraction, and cardiac index increased adequately (p <0.001). There was an abnormal decrease in end-diastolic volume and an adequate decrease in end-systolic volume (p <0.001). Stroke volume did not change with stress testing (p = 0.15). At rest, dominant left ventricles had higher ejection fractions than dominant right ventricles (p = 0.01), but this difference disappeared with stress testing. In conclusion, a functionally univentricular heart after Fontan completion at young age has an adequate increase in ejection fraction with beta-adrenergic stimulation. However, as a result of impaired preload with stress, cardiac output can be increased only by increasing heart rate.
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Hori Y, Uechi M, Indou A, Yamano S, Ebisawa T, Teshima K, Asano K. Changes in the myocardial performance index during dobutamine administration in anesthetized cats. Am J Vet Res 2007; 68:385-8. [PMID: 17397293 DOI: 10.2460/ajvr.68.4.385] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the relationship between myocardial performance index (MPI; also known as the Tei index) and cardiac function in anesthetized cats administered dobutamine. ANIMALS 6 adult cats. PROCEDURES Cats were anesthetized by administration of propofol (6 mg/kg, IV), and anesthesia was maintained by administration of isoflurane. Heart rate and systolic arterial pressure (SAP) were monitored. Stroke volume, cardiac output, and aortic blood flow (ABF) were measured by use of transesophageal ultrasonography. Left ventricular fractional shortening (LVFS), mitral E-wave velocity-to-A-wave velocity (E:A) ratio, and ejection time were measured by use of transthoracic echocardiography. Dobutamine was administrated via a cephalic vein at rates of 2.5, 5.0, and 10 microg/kg/min. RESULTS Heart rate, SAP, cardiac output, and ABF increased with dobutamine administration, whereas stroke volume significantly decreased. The LVFS significantly increased, and the E:A ratio significantly decreased. Total isovolumic time and the MPI significantly decreased. The MPI was negatively correlated (r=-0.63) with LVFS. Conversely, the MPI was positively correlated with the E:A ratio (r=0.47), stroke volume (r=0.66), and total isovolumic time (r=0.95). However, the MPI was not significantly correlated with heart rate, SAP, cardiac output, or ABF. CONCLUSION AND CLINICAL RELEVANCE Analysis suggested that the MPI provides a sensitive clinical assessment of cardiac response to medication in cats, which may be similar to the usefulness of the MPI reported in humans.
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Affiliation(s)
- Yasutomo Hori
- Veterinary Teaching Hospital, School of Veterinary Medicine & Animal Science, Kitasato University, 23-35-1 Higashi, Towada, Aomori 034-8628, Japan
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van den Berg J, Wielopolski PA, Meijboom FJ, Witsenburg M, Bogers AJJC, Pattynama PMT, Helbing WA. Diastolic Function in Repaired Tetralogy of Fallot at Rest and during Stress: Assessment with MR Imaging. Radiology 2007; 243:212-9. [PMID: 17293573 DOI: 10.1148/radiol.2431060213] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To prospectively assess, with magnetic resonance (MR) imaging, right ventricular (RV) diastolic function after repair of tetralogy of Fallot (TOF) at rest and during pharmacologic stress and to study relationship between main pulmonary artery end-diastolic forward flow (EDFF) (indicative of restrictive RV physiology) and clinical status. MATERIALS AND METHODS Institutional medical ethics committee approval and patient or parent informed consent were obtained. Patients with TOF corrected through the transatrial-transpulmonary approach underwent MR imaging at rest and during dobutamine stress and maximal exercise testing. Two-dimensional (2D) cine volumetric data were acquired. Flow measurements were performed with a standard 2D flow-sensitized sequence. MR imaging flow curves for tricuspid and pulmonary valves were combined into RV time-volume change curves, from which indexes of RV filling were derived. Patient results were compared with published data in control subjects. Student t tests, Mann-Whitney U tests, analysis of covariance, and paired and one-sample t tests were used. RESULTS Thirty-six patients (mean age at repair, 0.9 year +/- 0.5 [standard deviation]; median age at study inclusion, 17 years [range, 7-23 years]; 26 male and 10 female patients) were included. Abnormalities in RV filling included impaired relaxation (prolonged deceleration time, P = .002; smaller early filling fraction, P = .02) in the entire group compared with published data in healthy control subjects and signs of restriction to RV filling (smaller atrial filling fraction and higher early filling/atrial filling peak ratio, P < .05 for both) in patients with EDFF (n = 24) compared with patients without EDFF (n = 12). Stress response was abnormal in patients with EDFF, who developed impaired RV relaxation not appreciated at rest. Patients with EDFF had more severe pulmonary regurgitation (P < .05) and poorer exercise performance (P < .001). CONCLUSION In patients with TOF corrected with currently widely accepted surgical strategies, pulmonary artery EDFF relates to worse clinical state at mid- to long-term follow-up. Dobutamine stress imaging may unmask abnormalities in RV diastolic filling not appreciated with rest imaging alone.
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Affiliation(s)
- Jochem van den Berg
- Department of Pediatric Cardiology, Sophia Children's Hospital, Erasmus Medical Center, Dr Molewaterplein 60, 3015 GJ Rotterdam, the Netherlands
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Civelli M, Cardinale D, Martinoni A, Lamantia G, Colombo N, Colombo A, Gandini S, Martinelli G, Fiorentini C, Cipolla CM. Early reduction in left ventricular contractile reserve detected by dobutamine stress echo predicts high-dose chemotherapy-induced cardiac toxicity. Int J Cardiol 2006; 111:120-6. [PMID: 16242796 DOI: 10.1016/j.ijcard.2005.07.029] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Revised: 07/29/2005] [Accepted: 07/30/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND High-dose chemotherapy (HDC) is utilized in high-risk cancer patients. This type of treatment may induce cardiac toxicity which becomes clinically evident weeks or months after HDC. Hence, the possibility of early identification of patients who will develop cardiac impairment is strategic for its clinical implications. The aim of this study was to identify possible early changes of left ventricular contractile reserve (LVCR) in cancer patients undergoing HDC, as well as to evaluate the relevance of such changes as predictors of chemotherapy-induced cardiotoxicity. METHODS In forty-nine female patients scheduled for HDC, due to poor-prognosis breast cancer, dobutamine stress echocardiography (DSE) was performed, before each of the three HDC cycles (C1, C2, C3), and 1, 4, and 7 months after the end of chemotherapy. According to rest left ventricular ejection fraction (LVEF) evaluated within 18 months after HDC (f-LVEF), patients were allocated to Group A (LVEF < 50% and >10 absolute units reduction) and to Group B (LVEF > or = 50%). RESULTS Rest LVEF didn't show any significant difference between the two groups except at f-LVEF. Peak LVEF and LVCR significantly decreased in Group A only, starting from C3. At C3, a > or = 5 units fall in LVCR was found to be predictive for f-LVEF drop below 50%. CONCLUSIONS In patients undergoing HDC, low-dose DSE allows the early identification of patients at a high risk of developing cardiac dysfunction.
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Affiliation(s)
- Maurizio Civelli
- Cardiology Unit, European Institute of Oncology, University of Milan, Italy
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22
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De Caro E, Fioredda F, Calevo MG, Smeraldi A, Saitta M, Hanau G, Faraci M, Grisolia F, Dini G, Pongiglione G, Haupt R. Exercise capacity in apparently healthy survivors of cancer. Arch Dis Child 2006; 91:47-51. [PMID: 16188959 PMCID: PMC2083103 DOI: 10.1136/adc.2004.071241] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
AIMS To evaluate cardiopulmonary exercise tolerance in a large cohort of apparently healthy paediatric cancer survivors in order to determine their participation in sporting activities. METHODS A total of 84 young (<21 years) asymptomatic childhood cancer survivors, who had been exposed to anthracyclines (mean dose 212 mg/m2) and/or chest irradiation (median dose 2000 cGy), with normal left ventricular systolic function at rest (fractional shortening >29%), and 79 healthy controls were studied. Exercise testing was performed on a treadmill ergometer. Gas exchange analysis and derived variables were measured on a breath-by-breath basis. Pulmonary functional evaluation was performed before exercise. Echocardiographic evaluation at rest was performed within one month before the exercise test. RESULTS There were no differences in exercise responses between patients and controls. In boys <13 years, mean VO2 max was slightly but significantly lower than in controls. This finding was thought to be a result of decreased physical fitness as all the other exercise parameters were similar to those in the controls. CONCLUSIONS Results show that apparently healthy survivors of paediatric cancer can take part in dynamic sporting activities if they exhibit a normal response to cardiopulmonary exercise testing, while those that exhibit a reduced VO2 max should be re-evaluated after an aerobic training programme, and should undergo tailored dynamic physical activity if the VO2 max does not normalise.
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Affiliation(s)
- E De Caro
- Department of Cardiology, Giannina Gaslini Children's Hospital, Genoa, Italy
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23
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Paiva MG, Petrilli AS, Moisés VA, Macedo CRD, Tanaka C, Campos O. Cardioprotective effect of dexrazoxane during treatment with doxorubicin: a study using low-dose dobutamine stress echocardiography. Pediatr Blood Cancer 2005; 45:902-8. [PMID: 16035077 DOI: 10.1002/pbc.20488] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
AIM To assess the late cardioprotective effect of dexrazoxane associated with doxorubicin during treatment of osteosarcoma by means of low-dose dobutamine stress echocardiography (LDDSE) in non-relapsed asymptomatic children and teenagers. PATIENTS AND METHODS The study population included 58 patients with osteosarcoma divided in three groups, with equivalent age range, gender proportion and body surface area. Group I (21 patients, 14 males, 15 +/- 4 years) was analyzed before chemotherapy and considered the control group; Group II (19 patients, 11 males, 19.7 +/- 4 years) was treated with 348.4 +/- 18 mg/m2 of doxorubicin only and Group III (18 patients, 14 male, 16.8 +/- 5 years) treated with 396.5 +/- 55 mg/m2 of doxorubicin with dexrazoxane in the ratio 10:1. The patients were submitted to LDDSE (maximal dose 5 microg/kg/min). No major side effects were observed. Heart rate, blood pressure, left ventricular diameters, end systolic wall stress (ESWS), and other diastolic and systolic function indexes were assessed at rest conditions and during LDDSE and compared between the three groups. RESULTS Group III received a doxorubicin dose significantly greater than Group II (P = 0.001). During LDDSE there were no significant changes in the diastolic function indexes in any of the groups, but there was a significant increase of systolic indexes and a decrease of ESWS in Group III compared to group II. There was no significant difference of any systolic functional parameters between Group I and III. Considering the ejection fraction (EF) at rest or at LDDSE, 13 patients (69.4%) in Group II and 5 patients (27.7%) in Group III were considered to have systolic dysfunction. (P = 0.02). CONCLUSION Myocardial response to LDDSE in patients treated with doxorubicin and dexrazoxane was similar to patients without chemotherapy and better than those treated with doxorubicin only, suggesting less cardiotoxicity.
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Affiliation(s)
- Marcelo G Paiva
- Department of Cardiology, Federal University of São Paulo, EPM-UNIFESP-São Paulo, Brazil.
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24
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Hui L, Chau AKT, Leung MP, Chiu CSW, Cheung YF. Assessment of left ventricular function long term after arterial switch operation for transposition of the great arteries by dobutamine stress echocardiography. Heart 2005; 91:68-72. [PMID: 15604338 PMCID: PMC1768615 DOI: 10.1136/hrt.2003.027524] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To use dobutamine stress echocardiography to determine left ventricular (LV) function and wall motion of children long term after arterial switch operation (ASO) for transposition of the great arteries. DESIGN AND PATIENTS 31 patients (24 boys) with ASO performed at a mean (SD) of 15.5 (4.3) days of life were studied at an age of 9.4 (2.0) years. All had normal coronary angiographic findings. LV echocardiographic indexes, including fractional shortening, ejection fraction, rate corrected velocity of circumferential fibre shortening (VCFc), and wall stress, as well as LV wall motion abnormalities were determined at rest and under dobutamine stress. The results were compared with those of 20 healthy age matched control participants. SETTING Tertiary paediatric cardiac centre. RESULTS Fractional shortening, ejection fraction, and VCFc were significantly lower in patients than in controls at rest (all with p < 0.001). Stress-velocity index detected impaired LV contractility in 19 (61%) patients at rest. An older age at operation (p = 0.01), longer bypass (p = 0.01) and circulatory arrest times (p = 0.045), and an unusual coronary artery pattern (p = 0.059) were associated with impaired resting LV contractility. Dobutamine stress echocardiography unmasked wall motion abnormalities in 23 (74%) patients. Exercise myocardial perfusion scan, performed in 22 patients, showed reversible myocardial perfusion defects in 17. These defects corresponded to segments of hypokinesia as detected by dobutamine stress echocardiography. CONCLUSION A significant proportion of children, albeit asymptomatic, had impaired baseline LV contractility and reversible myocardial perfusion defects and mild wall motion abnormalities on stress after ASO.
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Affiliation(s)
- L Hui
- Division of Paediatric Cardiology, Grantham Hospital, The University of Hong Kong, Hong Kong, People's Republic of China
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25
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Effects of a single, 24-hour, low-dose intravenous dobutamine infusion on left ventricular myocardial performance index in congestive heart failure: A prospective, nonrandomized study. Curr Ther Res Clin Exp 2005; 66:35-44. [DOI: 10.1016/j.curtheres.2005.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2004] [Indexed: 11/18/2022] Open
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Jourdain P, Funck F, Fulla Y, Hagege A, Bellorini M, Guillard N, Loiret J, Thebault B, Desnos M. Myocardial contractile reserve under low doses of dobutamine and improvement of left ventricular ejection fraction with treatment by carvedilol. Eur J Heart Fail 2002; 4:269-76. [PMID: 12034151 DOI: 10.1016/s1388-9842(01)00239-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
To examine the ability of myocardial contractile reserve (MCR) assessment to predict the improvement of left ventricular ejection fraction with treatment by carvedilol, a prospective study was undertaken in 85 patients with chronic heart failure and left ventricular ejection fraction < 45%. Low dose dobutamine echocardiography (DSE), a 6-min walk test and measured brain natriuretic peptide (BNP) were assessed in all the patients. Patients were separated into two groups. Group A were patients without any myocardial reserve and group B patients with a myocardial contractile reserve defined as an increment of more than 20% of the resting left ventricular ejection fraction during dobutamine infusion. The two groups differed for percentage of ischemic cardiomyopathy (67.8 in group A vs. 29.7% in group B P = 0.028), 6-min walk test performance (respectively, 343 vs. 415 meters P < 0.05) and BNP plasma levels (respectively, 184.5 vs. 70.1 P < 0.02) but not for left ventricular ejection fraction or NYHA class. During DSE, MCR and heart rate variation was higher in group B than in group A. At the end of the follow up, LVEF increased and NYHA class decreased in group B but not in group A. In multivariate analysis the existence of MCR could predict the improvement of LVEF with treatment by carvedilol. In our study, studying MCR could help to predict patients who will improve their LVEF with carvedilol prior to the administration of the treatment.
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Affiliation(s)
- P Jourdain
- Service de Cardiologie Hôpital R. Dubos, 6 avenue d'île de France, 95300, Pontoise, France.
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27
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Yasuoka K, Arada K, Tamura M, Toyono M, Aoki M, Takada G. Effects of dobutamine on coronary flow velocity response and their relations to age. TOHOKU J EXP MED 2001; 195:171-9. [PMID: 11874250 DOI: 10.1620/tjem.195.171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of this study was to assess the effects of low-dose dobutamine on left ventricular (LV) functional and coronary flow reserves using transthracic echocardiography. The study group consisted of 30 children aged from 5 months to 16 years (mean 4.8 +/- 4.4 years). Echocardiographic studies were repeated before and during dobutamine infusion (5 microg/kg per minute). The peak diastolic velocity in the left descending coronary artery (LAD) was recorded by pulsed-Doppler under the guidance of color Doppler flow mapping. The coronary flow velocity (CFV) response was calculated as the ratio of LAD peak flow velocity at dobutamine infusion to basal LAD peak flow velocity. Left ventricular contractility was calculated by two-dimensionally directed M-mode echocardiography. The rate-corrected mean velocity of circumferential fiber shortening (mVcfc) and LV end-systolic wall stress (ESS) were used as indices of contractility. Adequate spectral Doppler recordings of the LAD peak flow velocity for the assessment of CFV response were obtained in 26 of 30 patients (87%). The LAD peak flow velocity at dobutamine infusion increased significantly compared with the basal values. The CFV response in the younger children was low and increased significantly with age. The CFV response did not show significant correlations with the changes in heart rate, systolic blood pressure, rate-pressure product, nor ESS during dobutamine infusion. However, a significant relationship between the CFV response and the percent change of mVcfc was observed. In the present study using high frequency transthoracic echocardiography, we demonstrated the age-related changes in CFV response and LV functional reserve by dobutamine infusion. Responses of LV contractility and coronary flow to dobutamine are less sensitive in youngerchildren and increased with increasing age.
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Affiliation(s)
- K Yasuoka
- Department of Pediatrics, Akita University School of Medicine, Japan.
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28
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Abstract
Stress echocardiography (SE) is currently a widely accepted method for the diagnostic and prognostic assessment of coronary artery disease. This article reviews new concepts in SE, such as new stress techniques, new methods of endocardial border detection, strain, tissue Doppler velocities, and others. Although some of these techniques are in their infancy, we believe that they will become widely accepted.
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Affiliation(s)
- W Mazur
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, 6550 Fannin Street, SM-1246, Houston, TX 77030-2717, USA
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Donofrio MT, Kakavand B, Moskowitz WB. Evaluation of regional wall motion and quantitative measures of ventricular function during dobutamine stress echocardiography in pediatric cardiac transplantation patients. J Am Soc Echocardiogr 2000; 13:932-40. [PMID: 11029718 DOI: 10.1067/mje.2000.106905] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Graft coronary disease is a leading cause of death in patients who have undergone cardiac transplantation. The purpose of this study was to evaluate regional wall motion response and quantitative measures of ventricular function during dobutamine stress echocardiography (DSE) in pediatric transplantation patients. METHODS Eleven patients were evaluated the first year after transplantation (10/11 no rejection). Ten of the 11 were reevaluated 1.2 +/- 0.3 years later (9/10 no rejection). RESULTS Dobutamine stress echocardiography revealed the following: (1) baseline regional wall motion abnormalities in 80% that resolved in all, (2) increased heart rate and blood pressure, (3) no change in left ventricular end-diastolic diameter, (4) decreased end-systolic diameter, (5) decreased wall stress and increased velocity of circumferential fiber shortening, (6) increased VCFcZ score (representing systolic left ventricular function), and (7) a decreased mitral passive-to-active filling ratio. Patients with rejection had abnormal VCFcZ scores at rest. CONCLUSIONS Pediatric transplantation patients without rejection have baseline regional wall motion abnormalities. With DSE, the following are present: (1) resolution of wall motion abnormalities, (2) increased contractility independent of load, and (3) changes in diastolic parameters that reflect increased heart rate. Patients with rejection may have abnormal contractility at rest.
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Affiliation(s)
- M T Donofrio
- Department of Pediatrics, Division of Pediatric Cardiology, Medical College of Virginia Hospitals of the Virginia Commonwealth University, Richmond 23298, USA.
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30
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Lanzarini L, Bossi G, Laudisa ML, Klersy C, Aricò M. Lack of clinically significant cardiac dysfunction during intermediate dobutamine doses in long-term childhood cancer survivors exposed to anthracyclines. Am Heart J 2000; 140:315-23. [PMID: 10925349 DOI: 10.1067/mhj.2000.108237] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Long-term survivors of childhood cancer treated with anthracyclines may have subclinical cardiac dysfunction undetectable at a baseline evaluation. Dobutamine stress echocardiography has been proposed as a more sensitive screening test, but results of previous studies were influenced by selection criteria, infusion protocols, and side effects. METHODS We applied a modified dobutamine stress test (from 5 to 10 to 15 microg/kg, infused over a 5-minute period) and evaluated the influence on stress test results of reported risk factors for late cardiac toxicity (female sex, younger age at treatment, higher dose of anthracycline, and longer duration of follow-up). Seventy-one patients (46 male, mean age 15 +/- 5 years) treated with anthracyclines (median dose 240 mg/m(2)) 1 to 16.5 years before and 20 controls (patients' siblings: 12 male, mean age 19 +/- 4 years) were studied. RESULTS No major side effects were recorded. One patient was unable to perform the test because of anxiety. Limiting side effects were infrequent (3%) and occurred at a dobutamine dose of > or =10 microg/kg, when significant changes of hemodynamic and echocardiographic parameters were detectable in all cases. Rest systolic and mean blood pressure and left ventricular fractional shortening were significantly lower in patients than in controls (P <.05), but no differences were found in any of the other indexes of cardiac function between the 2 groups at rest and during each dobutamine infusion step. A similar increase of global left ventricular function (percent of fractional shortening +45% vs +32%) and a decrease of end-systolic stress (-33% vs -29%) were documented. Left ventricular relaxation, early filling, and both relaxation and compliance improved. In all but one patient with reduced global left ventricular function at baseline, time-dependent patterns of hemodynamic and echocardiographic responses to dobutamine were similar. Previously described risk factors for cardiac toxicity did not influence the time changes of the echocardiographic parameters in response to dobutamine. CONCLUSIONS Compared with controls, most of our asymptomatic childhood cancer survivors, studied an average of 7 years after treatment with anthracyclines, showed normal baseline cardiac function. Our stress test was feasible and safe. Compared with modalities used in other studies, shorter infusion periods with higher dobutamine doses allowed a higher stress intensity to be reached without reducing patient compliance. At dobutamine stress test the response was comparable in patients and controls except for one patient. Previously reported risk factors for cardiac toxicity had no significant influence on stress test results.
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Affiliation(s)
- L Lanzarini
- Departments of Cardiology, Pediatrics, and Biometry and Clinical Epidemiology, IRCCS-Policlinico San Matteo, Pavia, Italy.
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31
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Abstract
Imaging algorithms in congenital heart disease, as in the patient with acquired heart diseases continue to evolve, with more and more information gleaned noninvasively. The emphasis will be on the newer aspects of imaging, not cross sectional echocardiography with color Doppler.
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Affiliation(s)
- J Russell
- Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
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De Wolf D, Foubert L, Van Belleghem Y, Mareels K, Matthys D, Verhaaren H, Van Nooten G. The influence of low afterload on the nature of the stress-velocity relationship. J Am Coll Cardiol 1999; 34:1219-25. [PMID: 10520816 DOI: 10.1016/s0735-1097(99)00343-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES Correct assessment of contractility by conventional methods during manipulation of afterload is often disappointing. To this purpose, the stress-velocity relationship offers assessment of contractility at different levels of afterload. We decided to study the influence of afterload on the nature of the stress-velocity relation. BACKGROUND Although linear at baseline conditions in a population older than two years, data in newborns or after administration of low-dose dobutamine suggest a different nature of this relationship at low afterload. METHODS Ten healthy piglets (five to six weeks; 11 to 13 kg) were studied. End-systolic meridional wall stress (ESWS) and rate-corrected velocity of circumferential fiber shortening (VcFc) were measured in these piglets at baseline, after balloon occlusion of the descending aorta, and at nitroprusside infusion rates of 1, 2 and 5 microg/kg/min. To eliminate inotropic influences mediated by reflex tachycardia, we subsequently studied five piglets and six adult pigs after bilateral cervical vagotomy. RESULTS The ESWS changed from a baseline mean of 50 g/cm2 to 137 g/cm2 after balloon occlusion and to 19 g/cm2 at 5 microg/kg/min of nitroprusside. The VcFc changed from 1.19 c/s (circumference/second) to values of 0.9 c/s and 1.73 c/s, respectively. The ensuing stress-velocity regression line proved to be curvilinear instead of linear. The steeper slope at low afterload could suggest enhanced contractility compared to expected values had the relationship been linear. CONCLUSIONS Data from young piglets and adult pigs suggest a curvilinear relationship of the stress-velocity relationship. This could probably explain some of the "hypercontractile states" encountered in conditions with low afterload.
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Affiliation(s)
- D De Wolf
- Department of Pediatrics, University Hospital UZGhent, Belgium.
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Phoon CK, Divekar A, Rutkowski M. Pediatric echocardiography: applications and limitations. CURRENT PROBLEMS IN PEDIATRICS 1999; 29:157-85. [PMID: 10410851 DOI: 10.1016/s0045-9380(99)80034-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Echocardiography is an extraordinarily useful imaging technique in fetuses, infants, children, and adolescents. Recent technologic innovations have expanded its versatility in the pediatric population. However, limited societal resources, limitations inherent to ultrasound imaging, and numerous imaging options even within the field of pediatric echocardiography necessitate the discriminate and thoughtful use of echocardiography in children. The clinical assessment remains a critical prelude to echocardiographic examination of the pediatric cardiovascular system.
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Affiliation(s)
- C K Phoon
- Pediatric Echocardiography Laboratory, New York University School of Medicine and Medical Center, New York, USA
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