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Kwak JH, Yang A, Jung HL, Kim HJ, Kim DS, Shim JY, Shim JW. Cardiac Evaluation before and after Oral Propranolol Treatment for Infantile Hemangiomas. J Clin Med 2024; 13:3332. [PMID: 38893043 PMCID: PMC11172932 DOI: 10.3390/jcm13113332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/26/2024] [Accepted: 06/03/2024] [Indexed: 06/21/2024] Open
Abstract
Background: Most recent clinical practice guidelines addressing the management of infantile hemangiomas (IHs) recommend oral propranolol, a non-selective beta-adrenergic antagonist, as first-line treatment. However, few reports have provided continuous follow-up data regarding cardiac evaluations. Methods: Sixty-four patients diagnosed with IHs and treated with oral propranolol before 2 years of age at the Department of Pediatrics, Kangbuk Samsung Hospital (Seoul, Republic of Korea), with regular examinations between 2017 and 2021, were included. Cardiac evaluations, including electrocardiography, Holter monitoring, chest X-ray, and echocardiography, were performed. Results: Sixty-four patients with IHs successfully underwent continuous follow-up cardiac evaluations. The median age at diagnosis was 2 weeks (1 day to 34.3 weeks). The median age at treatment initiation was 13.6 weeks (2.4-87.9 weeks), the mean longitudinal diameter of hemangioma at diagnosis was 2.8 ± 2.1 cm (0.3-12.0 cm), and the mean percentage of size decrease after 1 year of oral propranolol treatment was 71.8%. None of the 64 patients experienced severe adverse side effects during propranolol treatment. There was no statistically significant differences in echocardiographic function and electrocardiographic data after treatment. Conclusions: Propranolol treatment ≥6 months was effective and safe without significant cardiac toxicity in the treatment of patients with infantile hemangiomas.
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Affiliation(s)
| | | | - Hye Lim Jung
- Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul 03181, Republic of Korea; (J.H.K.); (A.Y.); (D.S.K.); (J.W.S.)
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Normal Values and Patterns of Normality and Physiological Variability of Mitral and Tricuspid Inflow Pulsed Doppler in Healthy Children. Healthcare (Basel) 2022; 10:healthcare10020355. [PMID: 35206969 PMCID: PMC8871925 DOI: 10.3390/healthcare10020355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/29/2022] [Accepted: 02/08/2022] [Indexed: 11/21/2022] Open
Abstract
Background: While mitral (MV) and tricuspid valve (TV) pulsed Doppler velocities and derived gradients are commonly evaluated, data on normal pediatric values are limited. This study aimed to evaluate the normal values and physiological variability for MV and TV Doppler velocities and derived gradients in a large cohort of prospectively enrolled healthy children. Methods: The echocardiographic measurements included pulsed Doppler MV and TV E and A velocities, E deceleration times (EDT), maximal and mean gradients, and velocity time integral (VTI). Results: A total of 544 healthy subjects (median age 6.4 years, range 1 day–17.68 years) were included. MV and TV E velocity, E/A ratio, and E and A wave duration increased, while A velocity decreased with age (p < 0.001). Along with an increase in VTI, there occurred a progressive increase in maximum velocity and gradients and a decrease in mean velocities and gradients. E/A inversions were common, especially at the TV in neonates and infants. For MV, inversion in either one, two, or three consecutive beats occurred in 51.9% of neonates and 18.3% of infants, while it was rare at older ages (all p < 0.001). For TV, inversions in three consecutive beats occurred in 71.4% of neonates, while inversions in only one or two beats were more common in infants (27.3%). For TV, inversion in one or more beats, however, was not infrequent at all ages. Conclusions: We report normal values and patterns of normality and physiological variability for MV and TV inflow Doppler from a large population of healthy children.
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Unnithan VB, Rowland T, George K, Bakhshi A, Beaumont A, Sculthorpe N, Lord RN, Oxborough DL. The effect of long-term soccer training on changes in cardiac function during exercise in elite youth soccer players. Scand J Med Sci Sports 2022; 32:892-902. [PMID: 35114040 DOI: 10.1111/sms.14140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/25/2022] [Accepted: 02/01/2022] [Indexed: 11/28/2022]
Abstract
It is unclear what the effect of long-term, high-volume soccer training has on left ventricular (LV) function during exercise in youth soccer players. This study evaluated changes in LV function during submaximal exercise in a group of highly-trained male soccer players (SP) as they transitioned over a three-year period from pre-adolescent to adolescent athletes. Data were compared to age-and sex-matched recreationally active controls (CON) over the same time period. Twenty-two SP from two professional English Premier League youth soccer academies (age: 12.0 ± 0.3 years at start of the study) and 15 CON (age: 11.7 ± 0.3 years) were recruited. Two-dimensional echocardiography was used to quantify LV function during exercise at the same submaximal metabolic load (approx. 45%VO2 peak) across the 3 years. After controlling for growth and maturation, there were training-induced changes and superiority (p<0.001) in cardiac index (QIndex) from year 1 in the SP compared to CON. SP (year 1: 6.13 ± 0.76; year 2: 6.94 ± 1.31 and year 3: 7.20 ± 1.81 L/min/m2 ) compared to CON (year 1: 5.15 ± 1.12; year 2: 4.67 ± 1.04 and year 3: 5.49 ± 1.06 L/min/m2 ). Similar training-induced increases were noted for mitral inflow velocity (E): SP (year 1: 129 ± 12; year 2: 143 ± 16 and year 3: 135 ± 18 cm/s) compared to CON (year 1: 113 ± 10; year 2: 111 ± 12 and year 3: 121 ± 9 cm/s).This study indicated that there was evidence of yearly, training-induced increases in left ventricular function during submaximal exercise independent from the influence of growth and maturation in elite youth SP.
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Affiliation(s)
- Viswanath Balagopalan Unnithan
- Institute of Clinical Exercise and Health Science, Division of Sport and Exercise, School of Health and Life Sciences, University of the West of Scotland, Hamilton, Scotland, UK
| | - Thomas Rowland
- Institute of Clinical Exercise and Health Science, Division of Sport and Exercise, School of Health and Life Sciences, University of the West of Scotland, Hamilton, Scotland, UK
| | - Keith George
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | | | | | - Nicholas Sculthorpe
- Institute of Clinical Exercise and Health Science, Division of Sport and Exercise, School of Health and Life Sciences, University of the West of Scotland, Hamilton, Scotland, UK
| | - Rachel Nia Lord
- Cardiff Centre for Exercise and Health, Cardiff Metropolitan University, Cardiff, UK
| | - David Lee Oxborough
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
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Lammers AE, Apitz C, Michel-Behnke I, Koestenberger M. A guide to echocardiographic assessment in children and adolescents with pulmonary hypertension. Cardiovasc Diagn Ther 2021; 11:1160-1177. [PMID: 34527541 DOI: 10.21037/cdt-21-119] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 06/23/2021] [Indexed: 12/14/2022]
Abstract
While the current definition of pulmonary hypertension (PH) is still based on haemodynamic variables, transthoracic echocardiography is the most important diagnostic clinical tool for the first assessment and evaluation of a patient, in whom PH is suspected. In addition, it is the most important clinical modality in long term follow-up and the utility of echocardiography has widely been demonstrated in patients with PH. Echocardiography not only reveals the underlying cardiac morphology and diagnosis of any associated cardiac defects. In most patients with PH right ventricular (RV) pressure estimation is feasible. In addition, ventricular systolic and diastolic function, as well as ventricular-ventricular interactions of both ventricles can be assessed by using echocardiography. Maximizing the use of echocardiography by reporting several measures to gain information and quantitatively describe the parameters, that are linked to prognosis, seem particularly appealing in these children, in whom other advanced imaging modalities requiring anaesthesia is associated with a considerable risk. Herein we provide a practical approach and a concise and clinically applicable echocardiographic guidance and present basic variables, which should be obtained at any assessment. Moreover, we present additional advanced echocardiographic measures, that can be applied in a research or clinical setting when progressive PH needs a deeper insight to assess heart function, estimation of pulmonary artery pressures among others, by echocardiography. Finally, clinically relevant studies in view of the prognostic properties with a focus on the most important echocardiographic variables in pediatric PH are summarized.
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Affiliation(s)
- Astrid E Lammers
- Pediatric Cardiology and Adult Congenital Heart Disease, University Hospital Münster, Münster, Germany
| | - Christian Apitz
- Pediatric Cardiology, University Children's Hospital Ulm, Ulm, Germany
| | - Ina Michel-Behnke
- Division of Pediatric Cardiology, University Hospital for Children and Adolescents, Pediatric Heart Centre Vienna, Medical University Vienna, Vienna, Austria
| | - Martin Koestenberger
- Division of Pediatric Cardiology and Pediatrics, Medical University Graz, Graz, Austria
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Lagrangian-averaged vorticity deviation of spiraling blood flow in the heart during isovolumic contraction and ejection phases. Med Biol Eng Comput 2021; 59:1417-1430. [PMID: 34115272 DOI: 10.1007/s11517-021-02366-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 04/27/2021] [Indexed: 02/06/2023]
Abstract
The formation of vortex rings in the left ventricular (LV) blood flow is a mechanism for optimized blood transport from the mitral valve inlet to aortic valve outlet, and the vorticity is an important measure of a well-functioning LV. However, due to lack of quantitative methods, the process of defining the boundary of a vortex in the LV and identifying the dominant vortex components has not been studied previously. The Lagrangian-averaged vorticity deviation (LAVD) can enable us to compute the trajectory integral of the normed difference of the vorticity from its spatial mean. Therefore, in this work, we have employed LAVD to identify the Lagrangian vortices and Eulerian vortices for measuring the vortex volume and vorticity in the LV blood flow. We found that during the LV ejection period, the positive (counterclockwise) and negative (clockwise) vorticity of patients are consistently stronger than those of the healthy groups, and the counterclockwise vortex volume of healthy groups (0.84+0.26 ml) is greater than that of patients (0.55+0.28 ml) during the pre-ejection period. Then, during the middle ejection phase, the counterclockwise vortex ring volume of patients (1.89+0.36 ml) exceeds that of healthy groups (1.38+0.43 ml). Finally, during the end-ejection period, the counterclockwise vortex ring volume of healthy subjects (0.61+0.17 ml) is the same as that of patients (0.60+0.19 ml). The results presented in this paper can provide new insights into the blood flow patterns within the LV. It can accurately indicate the role of vortices and vorticity values in intra-LV flow, and portray how cardiomyopathy (and its distorted contractile mechanism) can affect intra-LV flow patterns and mitigate adequate LV outflow.
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Progression of left ventricular diastolic function in the neonate and early childhood from transmitral color M-mode filling analysis. Pediatr Res 2021; 89:987-995. [PMID: 32570271 DOI: 10.1038/s41390-020-1011-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 05/22/2020] [Accepted: 06/03/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND We implemented sophisticated color M-mode analysis to assess age-dependent progression of left ventricular (LV) diastolic function. METHODS Normal infants were prospectively enrolled for serial echocardiograms at 1 week, 1 month, 6 months, 1 year, and 2 years. From color M-mode scans, propagation velocity (VP), strength of filling (VS), and intraventricular pressure difference (IVPD) in 3 segments along apex-to-mitral valve scan line were measured. RESULTS Age-wise comparisons of diastolic filling from 121 echocardiograms in 31 infants showed VP (cm/s), VS (cm2/s), and E-wave IVPD (mmHg) at 1 week to be 66.2 ± 11.9, 75.3 ± 19.9, and 1.5 ± 0.4, respectively, while VP, VS, and E-wave IVPD at 1 month were 80.3 ± 14.4, 101.2 ± 28.3, and 2.42 ± 1.1, respectively. There were significant differences in VP and segmental IVPD between first week and first month (p < 0.005) and IVPD between the age groups (p < 0.001). CONCLUSIONS Comprehensive analysis of transmitral color M-mode data is feasible in infants, enabling calculation of pressure drop between the LV base and apex and strength of propagation from two distinct slopes. Profound changes very early followed by relatively constant filling mechanics in later infancy indicate significant LV maturation occurring during the first month of life. IMPACT We implemented sophisticated analytic methods for color M-mode echocardiography in infants to assess age- and dimension-dependent changes in left ventricular diastolic function. Comprehensive characterization of transmitral color M-mode flow was feasible, enabling calculation of pressure drop between left ventricular base and apex and strength of propagation. Left ventricular diastolic filling function has predictable maturational progression, with significant differences in the intraventricular pressure between infants from birth to 2 years. This study forms the basis for future studies to examine alteration of early diastolic filling in congenital heart disease.
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Meinel K, Koestenberger M, Sallmon H, Hansmann G, Pieles GE. Echocardiography for the Assessment of Pulmonary Hypertension and Congenital Heart Disease in the Young. Diagnostics (Basel) 2020; 11:diagnostics11010049. [PMID: 33396225 PMCID: PMC7823322 DOI: 10.3390/diagnostics11010049] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/18/2022] Open
Abstract
While invasive assessment of hemodynamics and testing of acute vasoreactivity in the catheterization laboratory is the gold standard for diagnosing pulmonary hypertension (PH) and pulmonary vascular disease (PVD) in children, transthoracic echocardiography (TTE) serves as the initial diagnostic tool. International guidelines suggest several key echocardiographic variables and indices for the screening studies when PH is suspected. However, due to the complex anatomy and special physiological considerations, these may not apply to patients with congenital heart disease (CHD). Misinterpretation of TTE variables can lead to delayed diagnosis and therapy, with fatal consequences, or–on the other hand-unnecessary invasive diagnostic procedures that have relevant risks, especially in the pediatric age group. We herein provide an overview of the echocardiographic workup of children and adolescents with PH with a special focus on children with CHD, such as ventricular/atrial septal defects, tetralogy of Fallot or univentricular physiology. In addition, we address the use of echocardiography as a tool to assess eligibility for exercise and sports, a major determinant of quality of life and outcome in patients with PH associated with CHD.
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Affiliation(s)
- Katharina Meinel
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, 8036 Graz, Austria; (K.M.); (M.K.)
- European Pediatric Pulmonary Vascular Disease Network, 13125 Berlin, Germany; (H.S.); (G.H.)
| | - Martin Koestenberger
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, 8036 Graz, Austria; (K.M.); (M.K.)
- European Pediatric Pulmonary Vascular Disease Network, 13125 Berlin, Germany; (H.S.); (G.H.)
| | - Hannes Sallmon
- European Pediatric Pulmonary Vascular Disease Network, 13125 Berlin, Germany; (H.S.); (G.H.)
- Department of Pediatric Cardiology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany
- Department of Congenital Heart Disease/Pediatric Cardiology, Deutsches Herzzentrum Berlin (DHZB), 13353 Berlin, Germany
| | - Georg Hansmann
- European Pediatric Pulmonary Vascular Disease Network, 13125 Berlin, Germany; (H.S.); (G.H.)
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, 30625 Hannover, Germany
| | - Guido E. Pieles
- European Pediatric Pulmonary Vascular Disease Network, 13125 Berlin, Germany; (H.S.); (G.H.)
- National Institute for Health Research (NIHR) Cardiovascular Biomedical Research Centre, Congenital Heart Unit, Bristol Royal Hospital for Children and Bristol Heart Institute, Bristol BS2 8HW, UK
- Institute of Sport Exercise and Health (ISEH), University College London, London W1T 7HA, UK
- Correspondence:
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Razavi AC, Bazzano LA, He J, Whelton SP, Fernandez C, Ley S, Qi L, Krousel‐Wood M, Harlan TS, Kelly TN. Consumption of animal and plant foods and risk of left ventricular diastolic dysfunction: the Bogalusa Heart Study. ESC Heart Fail 2020; 7:2700-2710. [PMID: 33350106 PMCID: PMC7524109 DOI: 10.1002/ehf2.12859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/23/2020] [Accepted: 06/09/2020] [Indexed: 02/05/2023] Open
Abstract
AIMS Left ventricular diastolic dysfunction (LVDD) is an early heart failure with preserved ejection fraction (HFpEF) phenotype that is reversible. Identifying dietary predictors associated with LVDD in diverse populations may help broadly improve HFpEF primary prevention. METHODS AND RESULTS This longitudinal analysis included 456 individuals of the Bogalusa Heart Study (27% Black, 63% women, baseline age = 36.1 ± 4.4 years). Diet was measured at baseline through food frequency questionnaires. LVDD was defined at follow-up (median = 12.9 years) through echocardiographic measurement of the E/A ratio, E/e' ratio, isovolumic relaxation time, and deceleration time. Multivariable-adjusted logistic regression estimated the risk of LVDD according to dietary predictor, adjusting for traditional cardiovascular disease risk factors. Compared with the lowest tertile, participants in the middle tertile of total protein (OR = 3.30, 95% CI: 1.46, 7.45) and animal protein (OR = 2.91, 95% CI: 1.34, 6.34) consumption experienced the highest risk of LVDD. There was a 77% and 56% lower risk of LVDD for persons in the middle vs. lowest tertile of vegetable (OR = 0.23, 95% CI: 0.11, 0.49) and legume consumption (OR = 0.44, 95% CI: 0.22, 0.85), respectively. Total protein, animal protein, processed meat, and egg consumption indicated a quadratic trend towards increased risk of LVDD, while legume and vegetable intake conferred a quadratic trend towards decreased risk of LVDD (all quadratic P < 0.05). CONCLUSIONS Diets higher in animal foods and lower in plant foods are associated with an increased risk for LVDD. These findings suggest threshold effects of diet on LVDD, past which more traditional cardiometabolic determinants occupy a larger role in HFpEF risk.
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Affiliation(s)
- Alexander C. Razavi
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
- Department of MedicineTulane University School of MedicineNew OrleansLAUSA
| | - Lydia A. Bazzano
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
- Department of MedicineTulane University School of MedicineNew OrleansLAUSA
| | - Jiang He
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
- Department of MedicineTulane University School of MedicineNew OrleansLAUSA
| | - Seamus P. Whelton
- The Ciccarone Center for the Prevention of Cardiovascular DiseaseJohns Hopkins University School of MedicineBaltimoreMDUSA
| | - Camilo Fernandez
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
- Department of MedicineTulane University School of MedicineNew OrleansLAUSA
| | - Sylvia Ley
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
| | - Lu Qi
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
| | - Marie Krousel‐Wood
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
- Department of MedicineTulane University School of MedicineNew OrleansLAUSA
| | - Timothy S. Harlan
- Department of MedicineGeorge Washington University School of MedicineWashingtonDCUSA
| | - Tanika N. Kelly
- Department of EpidemiologyTulane University School of Public Health and Tropical MedicineNew OrleansLAUSA
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Left ventricular diastolic dysfunction in HIV-uninfected infants exposed in utero to antiretroviral therapy. AIDS 2020; 34:529-537. [PMID: 31764073 DOI: 10.1097/qad.0000000000002443] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To longitudinally measure LV diastolic function in HIV-exposed but uninfected (HEU) children perinatally exposed to ART. DESIGN HEU children who were perinatally exposed to antiretroviral therapy (ART) may be at risk for adverse cardiac effects. We have previously reported that those children have decreased left ventricular (LV) mass, dimension, and septal thickness with increased contractility. METHODS Serial echocardiograms were obtained at specific times from birth to 48 months from two groups of HIV-uninfected children: 148 HIV-negative children who were perinatally exposed to ART and 130 non-ART-exposed HIV-unexposed healthy controls. The following LV diastolic indices were obtained: mitral valve early and late diastolic velocity (E and A), tissue Doppler-derived LV-free wall and septal early diastolic velocity (LV e' and sep e'). RESULTS All echocardiographic indices were significantly different in ART-exposed children compared with ART-unexposed healthy controls. Both E and A were overall lower at all ages by 8.28 cm/s (P = 0.0002) and 13.46 cm/s (P < 0.0001) respectively. E/A ratio was higher by 0.27, 0.46, and 0.28 units at birth, 1 year and 2 years of age, respectively (all P ≤ 0.01). Moreover, LV e' and sep e' were overall lower at all ages by 0.84 cm/s (P = 0.01) and 0.47 cm/s (P = 0.02), respectively. CONCLUSION Children who were exposed to ART in utero have subclinical yet significant differences in specific LV diastolic indices. Follow-up with serial echocardiograms are recommended in this population to further assess the potential cardiac toxicity of perinatal exposure to ART.
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Kumar P, Morton JS, Shah A, Do V, Sergi C, Serrano‐Lomelin J, Davidge ST, Beker D, Levasseur J, Hornberger LK. Intrauterine exposure to chronic hypoxia in the rat leads to progressive diastolic function and increased aortic stiffness from early postnatal developmental stages. Physiol Rep 2020; 8:e14327. [PMID: 31960611 PMCID: PMC6971413 DOI: 10.14814/phy2.14327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
AIM We sought to explore whether fetal hypoxia exposure, an insult of placental insufficiency, is associated with left ventricular dysfunction and increased aortic stiffness at early postnatal ages. METHODS Pregnant Sprague Dawley rats were exposed to hypoxic conditions (11.5% FiO2 ) from embryonic day E15-21 or normoxic conditions (controls). After delivery, left ventricular function and aortic pulse wave velocity (measure of aortic stiffness) were assessed longitudinally by echocardiography from day 1 through week 8. A mixed ANOVA with repeated measures was performed to compare findings between groups across time. Myocardial hematoxylin and eosin and picro-sirius staining were performed to evaluate myocyte nuclear shape and collagen fiber characteristics, respectively. RESULTS Systolic function parameters transiently increased following hypoxia exposure primarily at week 2 (p < .008). In contrast, diastolic dysfunction progressed following fetal hypoxia exposure beginning weeks 1-2 with lower early inflow Doppler velocities, and less of an increase in early to late inflow velocity ratios and annular and septal E'/A' tissue velocities compared to controls (p < .008). As further evidence of altered diastolic function, isovolumetric relaxation time was significantly shorter relative to the cardiac cycle following hypoxia exposure from week 1 onward (p < .008). Aortic stiffness was greater following hypoxia from day 1 through week 8 (p < .008, except week 4). Hypoxia exposure was also associated with altered nuclear shape at week 2 and increased collagen fiber thickness at week 4. CONCLUSION Chronic fetal hypoxia is associated with progressive LV diastolic dysfunction, which corresponds with changes in nuclear shape and collagen fiber thickness, and increased aortic stiffness from early postnatal stages.
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Affiliation(s)
- Praveen Kumar
- Division of CardiologyDepartment of PediatricsUniversity of AlbertaEdmontonABCanada
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
| | - Jude S. Morton
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
- Department of Obstetrics/GynecologyUniversity of AlbertaEdmontonABCanada
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
| | - Amin Shah
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
- Department of Obstetrics/GynecologyUniversity of AlbertaEdmontonABCanada
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
| | - Victor Do
- Division of CardiologyDepartment of PediatricsUniversity of AlbertaEdmontonABCanada
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
| | - Consolato Sergi
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
- Department of Laboratory Medicine and PathologyUniversity of AlbertaEdmontonABCanada
| | - Jesus Serrano‐Lomelin
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
- Department of Obstetrics/GynecologyUniversity of AlbertaEdmontonABCanada
| | - Sandra T. Davidge
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
- Department of Obstetrics/GynecologyUniversity of AlbertaEdmontonABCanada
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
| | - Donna Beker
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
| | - Jody Levasseur
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
| | - Lisa K. Hornberger
- Division of CardiologyDepartment of PediatricsUniversity of AlbertaEdmontonABCanada
- Women and Children’s Health Research InstituteUniversity of AlbertaEdmontonABCanada
- Department of Obstetrics/GynecologyUniversity of AlbertaEdmontonABCanada
- Cardiovascular Research Institute and Mazankowski Alberta Heart InstituteUniversity of AlbertaEdmontonABCanada
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Kulkarni A, Morisawa D, Gonzalez D, Kheradvar A. Age‐related changes in diastolic function in children: Echocardiographic association with vortex formation time. Echocardiography 2019; 36:1869-1875. [DOI: 10.1111/echo.14479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 08/09/2019] [Accepted: 08/21/2019] [Indexed: 11/29/2022] Open
Affiliation(s)
- Aparna Kulkarni
- Department of Pediatric Cardiology Cohen Children’s Medical Center Zucker School of Medicine at Hofstra/Northwell New York NY USA
| | - Daisuke Morisawa
- Department of Biomedical Engineering University of California Irvine CA USA
- The Edwards Lifesciences Center for Advanced Cardiovascular Technology University of California Irvine CA USA
| | - Daisy Gonzalez
- Division of Pediatric Cardiology Children’s Hospital at Montefiore New York NY USA
| | - Arash Kheradvar
- Department of Biomedical Engineering University of California Irvine CA USA
- The Edwards Lifesciences Center for Advanced Cardiovascular Technology University of California Irvine CA USA
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12
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Benito Y, Martinez-Legazpi P, Rossini L, Pérez del Villar C, Yotti R, Martín Peinador Y, Rodríguez-Pérez D, Desco MM, Medrano C, Antoranz JC, Fernández-Avilés F, del Álamo JC, Bermejo J. Age-Dependence of Flow Homeostasis in the Left Ventricle. Front Physiol 2019; 10:485. [PMID: 31105588 PMCID: PMC6498893 DOI: 10.3389/fphys.2019.00485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/08/2019] [Indexed: 11/29/2022] Open
Abstract
Background: Intracardiac flow homeostasis requires avoiding blood stasis and platelet activation during its transit through the cardiac chambers. However, the foundations of intraventricular blood washout and its exposure to shear stresses have been poorly addressed. We aimed to characterize and quantify these features in a wide population of healthy subjects and assess the relationships of these indices with age. Methods: We used color-Doppler echocardiography and custom post-processing methods to study 149 healthy volunteers from 26 days to 80 years old. From the intraventricular flow-velocity fields we obtained personalized maps of (1) the residence time of blood in the LV, and (2) the shear index, a metric accounting for the strongest occurrence of shear stresses inside the chamber. From these maps we derived quantitative indices of the overall intraventricular blood washout and shear exposure. We addressed the age-dependence of these indices and analyzed their relationship with age-related changes in filling-flow. Results: The entire intraventricular blood pool was replaced before 8 cycles. Average residence time of blood inside the LV was <3 cycles in all subjects and followed an inverse U-shape relationship with age, increasing from median (IQR) of 1.0 (0.7 to 1.2) cycles in the 1st year of life to 1.8 (1.4-2.2) cycles in young adults (17-30 years old), becoming shorter again thereafter. Shear index showed no relation with age and was bounded around 20 dyn·s/cm2. Regions with the longest residence time and highest shear index were identified near the apex. Differences in the degree of apical penetration of the filling waves and the duration of the late-filling phase explained the age-dependence of residence time (R adj 2 = 0.48, p < 0.001). Conclusions: In average, blood spends 1 to 3 beats inside the LV with very low shear stress rates. The apical region is the most prone to blood stasis, particularly in mid-aged adults. The washout of blood in the normal LV is age-dependent due to physiological changes in the degree of apical penetration of the filling waves.
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Affiliation(s)
- Yolanda Benito
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
| | - Pablo Martinez-Legazpi
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
| | - Lorenzo Rossini
- Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA, United States
| | - Candelas Pérez del Villar
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
| | - Raquel Yotti
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
| | - Yolanda Martín Peinador
- Centro de Salud Goya, Dirección Asistencial Centro, Atención Primaria de Madrid, Madrid, Spain
| | - Daniel Rodríguez-Pérez
- Department of Mathematical Physics and Fluids, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Madrid, Spain
| | - M. Mar Desco
- Department of Mathematical Physics and Fluids, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Madrid, Spain
| | - Constancio Medrano
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
| | - Jose Carlos Antoranz
- Department of Mathematical Physics and Fluids, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Madrid, Spain
| | - Francisco Fernández-Avilés
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
| | - Juan C. del Álamo
- Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA, United States
- Institute for Engineering in Medicine, University of California, San Diego, La Jolla, CA, United States
| | - Javier Bermejo
- Department of Cardiology, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón and CIBERCV, Madrid, Spain
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Díaz A, Zócalo Y, Bia D. Percentile curves for left ventricle structural, functional and haemodynamic parameters obtained in healthy children and adolescents from echocardiography-derived data. J Echocardiogr 2019; 18:16-43. [PMID: 30927161 DOI: 10.1007/s12574-019-00425-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 01/24/2019] [Accepted: 03/19/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Transthoracic echocardiography is the most common non-invasive technique for the study of the left ventricle (LV) and the proximal aorta. Despite the clinical value, there is scarcity of data about reference intervals (RIs) and percentiles for thoracic aorta dimension and LV structural and functional parameters, obtained from population-based studies in children and adolescents. The aim was to generate RIs for LV, haemodynamic and thoracic aorta parameters obtained from transthoracic echocardiography in healthy children, adolescents and young adults from a South-American population. METHODS One thousand ninety-five healthy subjects (5-24 years) were studied (M-mode, B-mode and Doppler echocardiography). RESULTS RIs for LV structural (diameters, volumes and wall thickness) and functional (stroke volume, cardiac output, cardiac index, transmitral E and A flow waves velocities) parameters; systemic vascular resistance and aortic root diameter were obtained using parametric regression analyzes based on fractional polynomials. Covariate analysis (i.e., adjusting for age, body surface) showed that specific sex-specific RIs were necessary. Then, age, body height (BH), body weight (BW), body surface area (BSA), and sex-specific 1st, 2.5th, 5th, 10th, 25th, 50th, 75th, 90th, 95th, 97.5th and 99th percentiles were obtained. Our results were in agreement with and complimentary to available international databases. CONCLUSION This study provides RIs for echocardiography-derived haemodynamic, LV (structural and functional) and aortic parameters in children, adolescents and young adults considering data obtained from the largest Argentinean database. In early stages of life an adequate interpretation of echocardiography-derived LV and aortic parameters requires considering age, BH, BW, BSA and/or sex-specific RIs.
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Affiliation(s)
- Alejandro Díaz
- Instituto de Investigación en Ciencias de La Salud, UNICEN-CONICET, 4 de Abril 618, 7000, Tandil, Buenos Aires Province, Argentina.
| | - Yanina Zócalo
- Physiology Department, School of Medicine, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Republic University, General Flores 2125, 11800, Montevideo, Uruguay
| | - Daniel Bia
- Physiology Department, School of Medicine, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Republic University, General Flores 2125, 11800, Montevideo, Uruguay
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14
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Dallaire F, Sarkola T. Growth of Cardiovascular Structures from the Fetus to the Young Adult. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1065:347-360. [PMID: 30051395 DOI: 10.1007/978-3-319-77932-4_22] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The size, hemodynamics, and function of cardiovascular structures change dramatically from the early fetal life to late adolescence. The principal determinants of cardiovascular dimensions are related to the blood flow needed to meet metabolic demands. This demand is in turn tightly related to body size and body composition, keeping in mind that various tissues may have different metabolic rates. There is no simple model that links cardiac dimensions with a single body size measurement. Consequently, despite abundant scientific literature, few studies have proposed pediatric reference values that efficiently and completely account for the effect of body size. Other factors influence cardiovascular size and function in children, including sex. The influence of sex is multifactorial and not fully understood, but differences in body size and body composition play an important role. We will first review the determinants of cardiovascular size and function in children. We then explore the evaluation and normalization of cardiovascular size and function in pediatric cardiology in relation to the growth of cardiovascular structures during childhood, with a particular focus on sex differences.
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Affiliation(s)
| | - Taisto Sarkola
- University of Helsinki, the Helsinki University Central Hospital/Children's Hospital, Helsinki, Finland
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15
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Sehgal A, Allison BJ, Gwini SM, Menahem S, Miller SL, Polglase GR. Vascular aging and cardiac maladaptation in growth-restricted preterm infants. J Perinatol 2018; 38:92-97. [PMID: 29120452 DOI: 10.1038/jp.2017.135] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 07/10/2017] [Indexed: 01/09/2023]
Abstract
OBJECTIVE To assess arterial morphology and mechanics in preterm infants with fetal growth restriction (FGR) compared with those appropriate for gestational age (AGA) in the early neonatal period. STUDY DESIGN This observational study involved 20 preterm FGR infants (28 to 32 weeks) of gestational age (GA) and birth weight (BW) <10th centile and 20 preterm AGA infants. Vascular ultrasound was performed to measure aortic properties. RESULTS GA and BW of FGR and AGA infants were 29.8±1.3 vs 30±0.9 weeks (P=0.78) and 923.4±168 vs 1403±237 g (P<0.001), respectively. At 10.5±1.3 (s.d.) days after birth, blood pressure (systolic 51±3 vs 46±4 mm Hg, P<0.001) and maximum aorta intima-media thickness (621±76 vs 479±54 μm; P<0.001) were significantly higher in FGR infants. Arterial wall stiffness and peripheral resistance were also increased in the FGR infants (2.36±0.24 vs 2.14±0.24, P=0.008 and 22.2±5 vs 13.7±2.3 mm Hg min ml-1, P<0.001), respectively. Significant correlations between vascular mechanics and cardiac function were observed (resistance vs E/E', r=0.7 and Tei index, r=0.79). CONCLUSION Maladaptive arterial-ventricular coupling was noted. Early detection may aid in early therapeutic strategies such as afterload reduction.
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Affiliation(s)
- A Sehgal
- Monash Newborn, Monash Children's Hospital, Melbourne, VIC, Australia.,Department of Pediatrics, Monash University, Melbourne, VIC, Australia
| | - B J Allison
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - S M Gwini
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia
| | - S Menahem
- Paediatric and Fetal Cardiac Units, Monash Medical Centre, Monash Health, Melbourne, VIC, Australia
| | - S L Miller
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, VIC, Australia
| | - G R Polglase
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, VIC, Australia
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16
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Centile Curves for Velocity-Time Integral Times Heart Rate as a Function of Ventricular Length: The Use of Minute Distance Is Advantageous to Enhance Clinical Reliability in Children. J Am Soc Echocardiogr 2017; 31:105-112.e2. [PMID: 29158018 DOI: 10.1016/j.echo.2017.09.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND The generation of velocity-time integrals (VTIs) from Doppler signals is an essential component of standard echocardiographic investigations. The most effective algorithm to compensate for growth in children has, however, not yet been identified. This study was initiated to establish pediatric reference values for VTI and to enhance the interpretability of those values, considering technical and physiological factors. METHODS The echocardiographic data sets of healthy children and adolescents (N = 349; age range, 0-20 years) were recorded in a prospective approach and subsequently analyzed. In a pilot study, aortic and pulmonary VTIs were set in relation to the physiologic parameters of heart size as possible influencing parameters in a subgroup of children with comparable physical characteristics. The ratio with the smallest SD was taken as the base to generate centile curves using the LMS method. The clinical utility of the model was tested by examining patients (n = 80) with shunt lesions such as patent ductus arteriosus and atrial septal defect. RESULTS Feasibility was 94.6% for aortic VTI and 92.8% for pulmonary VTI. The pilot study identified ventricular length and heart rate as suitable parameters with the lowest relative SDs and high correlations with VTI. Gender differences were not relevant for children <7 years of age, and with increasing age, SD increased because of higher stroke volume variations. The detection of increased aortic VTI was possible with sensitivity of 73% for patients with patent ductus arteriosus with moderate or large hemodynamically significant ductus arteriosus. Patients with atrial septal defects with enlarged right ventricles could be identified as having increased pulmonary VTI with sensitivity of 84%. CONCLUSIONS These new reference values for VTI times heart rate as a function of ventricular length may be of specific clinical value to improve the assessment of cardiac function, therapeutic decision making, and follow-up in pediatric patients with heart disease.
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17
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Plehn JF, Hasbani K, Ernst I, Horton KD, Drinkard BE, Di Prospero NA. The Subclinical Cardiomyopathy of Friedreich's Ataxia in a Pediatric Population. J Card Fail 2017; 24:672-679. [PMID: 28986271 DOI: 10.1016/j.cardfail.2017.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 08/10/2017] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Identification of a subclinical cardiomyopathy in pediatric patients with Friedreich's ataxia (FA) has not been well-described. METHODS We performed echocardiography (Echo), cardiac magnetic resonance imaging (cMRI), and neurologic assessment in a cross-sectional analysis of 48 genetically confirmed FA subjects aged 9-17 years with moderate neurologic impairment but without a cardiovascular history. Echo- and cMRI-determined left ventricular mass were indexed (LVMI) to height in grams/m2.7. LV remodeling was categorized as concentric remodeling (CR), concentric hypertrophy (CH), or eccentric hypertrophy based upon Echo- determined relative LV wall thickness. RESULTS Echo LVMI exceeded age-based normal values in 85% of subjects, and cMRI-determined LVMI correlated with depression of both diastolic and systolic tissue Doppler velocity (E': r = -0.65, P < .001, S': r = -0.46, P < .001) as well as increased early diastolic Doppler flow velocity/tissue velocity ratio (r= 0.55, P < .001), a marker of elevated LV filling pressure. Similar associations were found with echo-determined LV mass. Evidence of depressed LV relaxation and increased LV stiffness were observed in 88% and 71%, of subjects, respectively, despite a normal LV ejection fraction in almost all cases (mean = 60% + 7%). CR and CH were present in 40% and 44% of the study group, respectively, although significant depressions of E' and S' were observed only in subjects with CH (P < .005). CONCLUSIONS A subclinical hypertrophic cardiomyopathy is common in pediatric FA patients and CH is associated with both diastolic and systolic dysfunction.
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Affiliation(s)
- Jonathan F Plehn
- Translational Medicine Branch, National Heart, Lung and Blood Institute.
| | - Keren Hasbani
- Translational Medicine Branch, National Heart, Lung and Blood Institute
| | - Inez Ernst
- Translational Medicine Branch, National Heart, Lung and Blood Institute
| | | | - Bart E Drinkard
- Physical Rehabilitation Department, Clinical Research Center
| | - Nicholas A Di Prospero
- National Institute of Neurologic Diseases and Stroke, all of the National Institutes of Health, Bethesda, Maryland
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18
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Sehgal A, Allison BJ, Gwini SM, Miller SL, Polglase GR. Cardiac Morphology and Function in Preterm Growth Restricted Infants: Relevance for Clinical Sequelae. J Pediatr 2017; 188:128-134.e2. [PMID: 28662946 DOI: 10.1016/j.jpeds.2017.05.076] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Revised: 04/27/2017] [Accepted: 05/30/2017] [Indexed: 12/30/2022]
Abstract
OBJECTIVES To assess cardiac morphology and function in preterm infants with fetal growth restriction (FGR) compared with an appropriate for gestational age cohort, and to ascertain clinical correlation with neonatal sequelae. STUDY DESIGN With informed consent, 20 infants born between 28 and 32 weeks of gestational age and birthweight (BW) <10th percentile were compared using conventional and tissue Doppler echocardiography with 20 preterm appropriate for gestational age infants. Total duration of respiratory support was recorded. RESULTS The gestational age and BW of the infants with FGR and appropriate for gestational age infants were 29.8 ± 1.3 weeks vs 30 ± 0.9 weeks (P = .78) and 923.4 ± 168 g vs 1403 ± 237 g (P < .001), respectively. Preterm infants with FGR had significantly greater interventricular septal hypertrophy, greater free wall thickening, and lower sphericity indices (1.53 ± 0.15 vs 1.88 ± 0.2; P < .001), signifying globular and hypertrophied hearts. The transmitral E/A ratio and isovolumic relaxation time, markers of diastolic function, were significantly increased in the FGR cohort (0.84 ± 0.05 vs 0.78 ± 0.03 [P < .001] and 61.4 ± 4.1 ms vs 53.2 ± 3.2 ms [P < .001], respectively). Ejection fraction, as measured by the rate corrected mean velocity of circumferential fiber shortening was reduced (1.93 ± 0.4 circ/second vs 2.77 ± 0.5 circ/second; P < .001) in the FGR cohort. On follow-up, the total duration of respiratory support was significantly longer in the FGR cohort, and correlated with tissue Doppler E/E' (r = 0.65; P = .001), mean velocity of circumferential fiber shortening (r = -0.64; P = .001) and mitral annular peak systolic excursion (r = -0.57; P = .008). CONCLUSIONS Preterm infants with FGR have altered cardiac function evident within days after birth, which is associated with respiratory sequelae.
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Affiliation(s)
- Arvind Sehgal
- Monash Newborn, Monash Children's Hospital, Melbourne, Australia; Department of Pediatrics, Monash University, Melbourne, Australia.
| | - Beth J Allison
- The Ritchie Center, Hudson Institute of Medical Research, Clayton, Victoria, Australia
| | - Stella M Gwini
- Department of Epidemiology & Preventive Medicine, Monash University, Clayton, Victoria, Australia
| | - Suzanne L Miller
- The Ritchie Center, Hudson Institute of Medical Research, Clayton, Victoria, Australia; Department of Obstetrics and Gynecology, Monash University, Clayton, Victoria, Australia
| | - Graeme R Polglase
- The Ritchie Center, Hudson Institute of Medical Research, Clayton, Victoria, Australia; Department of Obstetrics and Gynecology, Monash University, Clayton, Victoria, Australia
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19
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Tony Nengom J, Sap Ngo Um S, Chelo D, Mbono Betoko R, Boombhi J, Mouafo Tambo F, Chiabi A, Kingue S, Koki Ndombo P. Assessment of cardiac function in children with congenital adrenal hyperplasia: a case control study in Cameroon. BMC Pediatr 2017; 17:109. [PMID: 28427378 PMCID: PMC5399398 DOI: 10.1186/s12887-017-0862-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 04/06/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND High level of androgens found in congenital adrenal hyperplasia (CAH) seems to have a deleterious effect on heart function. We therefore evaluate cardiac function of children with CAH in comparison with a healthy group. METHODS We carried out a case-control study in the single endocrinology unit of the Mother and Child Center of Chantal Biya's Foundation. Cases were matched for age and genotypic sex to 2 healthy controls. We analyzed the ejection fraction (LVEF), fractional shortening and left ventricular mass; output and cardiac index; E and A waves velocities, E/A ratio and the mitral deceleration time and diameter of the left atrium; tricuspid annular plane systolic excursion and pulmonary artery systolic pressure were also measured. RESULTS We included 19 patients with a median age of 6.26 ± 3.75 years and 38 controls stackable distribution. The left ventricular mass of cases was greater than that of controls. A case of reversible cardiomyopathy on hormone replacement therapy was found. For the cases, the average ejection fraction was 71.95 ± 7.88%; the average fractional shortening was 40.67 ± 7.02%. All these values were higher than those of controls, although the difference was not statistically significant. Diastolic left ventricular function was more impaired among the cases. Right ventricular function was similar in both groups. These abnormalities were highly correlated to the late age at diagnosis and duration of treatment. CONCLUSION This study shows an altered cardiac function in CAH compared to healthy control and highlights importance of an early diagnosis of cases, a tight control of androgens levels and a regular monitoring of cardiac function.
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Affiliation(s)
- J Tony Nengom
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.
| | - S Sap Ngo Um
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Mother and Child Centre of the Chantal Biya Foundation, Yaounde, Cameroon
| | - D Chelo
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Mother and Child Centre of the Chantal Biya Foundation, Yaounde, Cameroon
| | - R Mbono Betoko
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon
| | - J Boombhi
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Yaounde General Hospital, Yaounde, Cameroon
| | - F Mouafo Tambo
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Yaounde Gyneco Obstetric and Pediatric Hospital, Yaounde, Cameroon
| | - A Chiabi
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Yaounde Gyneco Obstetric and Pediatric Hospital, Yaounde, Cameroon
| | - S Kingue
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Yaounde General Hospital, Yaounde, Cameroon
| | - P Koki Ndombo
- Faculty of Medicine and Biomedical Sciences of Yaounde I University, P.O Box: 14855, Yaounde, Cameroon.,Yaounde General Hospital, Yaounde, Cameroon
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20
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Gimpel C, Jung BA, Jung S, Brado J, Schwendinger D, Burkhardt B, Pohl M, Odening KE, Geiger J, Arnold R. Magnetic resonance tissue phase mapping demonstrates altered left ventricular diastolic function in children with chronic kidney disease. Pediatr Radiol 2017; 47:169-177. [PMID: 27966039 DOI: 10.1007/s00247-016-3741-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 09/26/2016] [Accepted: 10/20/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Echocardiographic examinations have revealed functional cardiac abnormalities in children with chronic kidney disease. OBJECTIVE To assess the feasibility of MRI tissue phase mapping in children and to assess regional left ventricular wall movements in children with chronic kidney disease. MATERIALS AND METHODS Twenty pediatric patients with chronic kidney disease (before or after renal transplantation) and 12 healthy controls underwent tissue phase mapping (TPM) to quantify regional left ventricular function through myocardial long (Vz) and short-axis (Vr) velocities at all 3 levels of the left ventricle. RESULTS Patients and controls (age: 8 years-20 years) were matched for age, height, weight, gender and heart rate. Patients had higher systolic blood pressure. No patient had left ventricular hypertrophy on MRI or diastolic dysfunction on echocardiography. Fifteen patients underwent tissue Doppler echocardiography, with normal z-scores for mitral early diastolic (VE), late diastolic (VA) and peak systolic (VS) velocities. Throughout all left ventricular levels, peak diastolic Vz and Vr (cm/s) were reduced in patients: Vzbase -10.6 ± 1.9 vs. -13.4 ± 2.0 (P < 0.0003), Vzmid -7.8 ± 1.6 vs. -11 ± 1.5 (P < 0.0001), Vzapex -3.8 ± 1.6 vs. -5.3 ± 1.6 (P = 0.01), Vrbase -4.2 ± 0.8 vs. -4.9 ± 0.7 (P = 0.01), Vrmid -4.7 ± 0.7 vs. -5.4 ± 0.7 (P = 0.01), Vrapex -4.7 ± 1.4 vs. -5.6 ± 1.1 (P = 0.05). CONCLUSION Tissue phase mapping is feasible in children and adolescents. Children with chronic kidney disease show significantly reduced peak diastolic long- and short-axis left ventricular wall velocities, reflecting impaired early diastolic filling. Thus, tissue phase mapping detects chronic kidney disease-related functional myocardial changes before overt left ventricular hypertrophy or echocardiographic diastolic dysfunction occurs.
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Affiliation(s)
- Charlotte Gimpel
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Center for Pediatrics, Medical Center - University of Freiburg, Mathildenstr. 1, 79106,, Freiburg, Germany.
| | - Bernd A Jung
- Institute of Diagnostic, Interventional and Pediatric Radiology, Inselspital Bern, Bern, Switzerland
| | - Sabine Jung
- Department of Nuclear Medicine, Medical Center - University of Freiburg, Freiburg, Germany
| | - Johannes Brado
- Department of Cardiology and Angiology I, University Heart Center Freiburg, Freiburg, Germany
| | | | - Barbara Burkhardt
- Pediatric Heart Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Martin Pohl
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Center for Pediatrics, Medical Center - University of Freiburg, Mathildenstr. 1, 79106,, Freiburg, Germany
| | - Katja E Odening
- Department of Cardiology and Angiology I, University Heart Center Freiburg, Freiburg, Germany
| | - Julia Geiger
- Department of Radiology, University Children's Hospital Zurich, Zurich, Switzerland.,Department of Radiology, Northwestern University, 737 N. Michigan Ave., Chicago, IL, USA
| | - Raoul Arnold
- Department of Pediatric and Congenital Cardiology, University Hospital Heidelberg, Heidelberg, Germany
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21
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Cordell LL. Comparison of Current Echocardiographic Modalities Used to Assess Left Ventricle Diastolic Function in Pediatric Patients. JOURNAL OF DIAGNOSTIC MEDICAL SONOGRAPHY 2016. [DOI: 10.1177/8756479316632724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tissue Doppler imaging, left ventricular color M-mode velocity propagation, and deformation imaging techniques from the medical literature were critically reviewed. The review was undertaken to evaluate the accuracy, reproducibility, and clinical efficiency of echocardiographic technologies for image acquisition and data analysis in assessing pediatric diastolic function. Tissue Doppler imaging, velocity propagation, and deformation imaging all show low variability and high reproducibility and specificity. Age, growth, heart rate, morphology, and sonographic technique affect some pediatric echocardiographic indices more than others; therefore, each should not be solely relied on. Their complementary diagnostic information should be evaluated collectively as a complete echocardiographic examination by expertly trained medical professionals.
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22
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Impact of Interatrial Communication on Left Ventricle Performance in Patients with Significant Post-tricuspid Shunt. Pediatr Cardiol 2016; 37:582-92. [PMID: 26706468 DOI: 10.1007/s00246-015-1318-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 12/07/2015] [Indexed: 10/22/2022]
Abstract
Infants with post-tricuspid valve shunts (PTS) may benefit from interatrial communication (IAC). The effect of IAC on left ventricular (LV) performance in these patients was studied. IAC was documented prospectively in 55 patients with PTS. Clinical status, echocardiographic dimensions of LV, mitral inflow Doppler, tissue Doppler velocities and time intervals were measured. Creatinine kinase (CK), CKMB, troponin-I and NT pro-brain natriuretic peptide (NT pro-BNP) were measured. Patients were divided into four groups: (A) PTS but no IAC (n = 32); (B) PTS and IAC (n = 23); (C) VSD but no IAC (n = 16); and (D) VSD and IAC (n = 19). Group A had more frequent mitral regurgitation (p = 0.041), larger mitral annulus (1.80 vs. 1.30 cm, p < 0.0001) and larger LV systolic and diastolic dimensions (2.01 vs. 1.40 and 3.28 vs. 2.35 cm, p < 0.001) than group B. The E-wave deceleration time tended to be longer in group A (121.0 vs. 106.8 ms, p = 0.06). By tissue Doppler, group A had E'- and S-waves significantly taller (15.51 vs. 13.14 and 7.69 vs. 6.72 cm, p = 0.04 and p = 0.005, respectively) than group B. Also, NT pro-BNP was significantly higher in group A (1116.15 vs. 458.73 pg/ml, p = 0.028). Group C had significant larger mitral z-score values (1.2 vs. 0.01, p < 0.001), larger LV diameter z-score (p = 0.001) and higher NT pro-BNP level (1477.37 vs. 451.66 pg/ml, p = 0.001) than group D. There was no significant difference in the clinical status between the groups. In children with PTS, the presence of IAC could be beneficial. Their echocardiographic parameters and biomarker show better systolic and diastolic LV performance.
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Cantinotti M, Giordano R, Scalese M, Murzi B, Assanta N, Spadoni I, Crocetti M, Marotta M, Molinaro S, Kutty S, Iervasi G. Nomograms for mitral inflow Doppler and tissue Doppler velocities in Caucasian children. J Cardiol 2015; 68:288-99. [PMID: 26564714 DOI: 10.1016/j.jjcc.2015.10.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 08/23/2015] [Accepted: 09/15/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Pediatric echocardiographic nomograms for systolic/diastolic functional indices are limited by small sample size and inconsistent methodologies. Our aim was to establish pediatric nomograms for mitral valve (MV) pulsed wave Doppler (PWD) and tissue Doppler imaging (TDI) velocities. METHODS We performed PWD/TDI measurements of MV velocities and generated models testing for linear/logarithmic/exponential/square root relationships. Heteroscedasticity was accounted for by White test or Breusch-Pagan test. Age, weight, height, heart rate (HR), and body surface area (BSA) were used as independent variables in different analyses to predict the mean values of each measurement. RESULTS In all, 904 Caucasian Italian healthy children (age 0 days-17 years; 45.5% females; BSA 0.12-2.12m(2)) were prospectively studied. No individual variable provided equations with an acceptable coefficient of determination (R(2)) and even the inclusion of multiple variables in the model resulted in only a partial amelioration of the R(2). Higher R(2) were obtained for PWD-E deceleration time (0.53), septal (Se') and lateral (Le') MV-TDI e' velocity (Se': 0.54; Le': 0.55). Variability was higher at lower age and BSA. In older children patterns were more reproducible; however, the exclusion of neonates did not substantially improve the final models. The low R(2) hampered building of z-scores and calculation of estimated percentiles. Thus normative data have been presented as observed percentile according to age for all measurements. CONCLUSIONS We report normal ranges for PWD and TDI mitral velocities derived from a large population of Caucasian children. Variability of diastolic patterns especially at lower ages needs to be taken into account.
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Affiliation(s)
| | | | | | - Bruno Murzi
- Tuscany Foundation "G. Monasterio", Massa and Pisa, Italy
| | - Nadia Assanta
- Tuscany Foundation "G. Monasterio", Massa and Pisa, Italy
| | | | - Maura Crocetti
- Tuscany Foundation "G. Monasterio", Massa and Pisa, Italy
| | - Marco Marotta
- Tuscany Foundation "G. Monasterio", Massa and Pisa, Italy
| | | | - Shelby Kutty
- University of Nebraska Medical Center/Children's Hospital and Medical Center, Omaha, NE, USA
| | - Giorgio Iervasi
- Tuscany Foundation "G. Monasterio", Massa and Pisa, Italy; Institute of Clinical Physiology, Pisa, Italy
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24
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Dallaire F, Slorach C, Hui W, Sarkola T, Friedberg MK, Bradley TJ, Jaeggi E, Dragulescu A, Har RLH, Cherney DZI, Mertens L. Reference values for pulse wave Doppler and tissue Doppler imaging in pediatric echocardiography. Circ Cardiovasc Imaging 2015; 8:e002167. [PMID: 25632029 DOI: 10.1161/circimaging.114.002167] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND In pediatric echocardiography, pulse wave Doppler, and tissue Doppler imaging velocities are widely used to assess cardiac function. Current reference values and Z scores, allowing adjustment for growth are limited by inconsistent methodologies and small sample size. Using a standardized approach for parametric modeling and Z score quality assessment, we propose new pediatric reference values and Z score equations for most left ventricular pulse wave Doppler and tissue Doppler imaging measurements. METHODS AND RESULTS Two hundred thirty-three healthy pediatric subjects 1 to 18 years of age were prospectively recruited. Thirteen pulse wave Doppler and 14 tissue Doppler imaging measurements were recorded. Normalization for growth was done via a complete and standardized approach for parametric nonlinear regression modeling. Several analyses were performed to ensure adequate Z score distribution and to detect potential residual associations with growth or residual heteroscedasticity. Most measurements adopted a nonlinear relationship with growth and displayed significant heteroscedasticity. Compared with age, height, and weight, normalization for body surface area was most efficient in removing the effect of growth. Generally, polynomial and allometric models yielded adequate goodness-of-fit. Residual values for several measurements had significant departure from the normal distribution, which could be corrected using logarithmic or reciprocal transformation. Overall, weighted parametric nonlinear models allowed us to compute Z score equations with adequate normal distribution and without residual association with growth. CONCLUSIONS We present Z scores for normalized pulse wave Doppler and tissue Doppler imaging in pediatric echocardiography. Further studies are needed to define the threshold beyond which health becomes a disease by integrating other important factors such as ventricular morphology, loading conditions, and heart rate.
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Affiliation(s)
- Frederic Dallaire
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.).
| | - Cameron Slorach
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Wei Hui
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Taisto Sarkola
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Mark K Friedberg
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Timothy J Bradley
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Edgar Jaeggi
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Andreea Dragulescu
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Ronnie L H Har
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - David Z I Cherney
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
| | - Luc Mertens
- From the Division of Pediatric Cardiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada (F.D.); The Labatt Family Heart Centre, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada (C.S., W.H., T.S., M.K.F., T.J.B., E.J., A.D., L.M.); and Division of Nephrology, Department of Medicine, Toronto General Hospital, University of Toronto, Ontario, Canada (R.L.H.H., D.Z.I.C.)
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25
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Assessment of Ventricular-Vascular Function by Echocardiography. CONGENIT HEART DIS 2015. [DOI: 10.1007/978-4-431-54355-8_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sirc J, Dempsey EM, Miletin J. Diastolic ventricular function improves during the first 48-hours-of-life in infants weighting <1250 g. Acta Paediatr 2015; 104:e1-6. [PMID: 25163391 DOI: 10.1111/apa.12788] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 08/15/2014] [Accepted: 08/20/2014] [Indexed: 11/28/2022]
Abstract
AIM Few studies have focused on cardiac ventricular diastolic function in preterm neonates in the immediate post-natal period. This study evaluated Doppler-derived parameters of diastolic ventricular function in infants with birth weights of <1250 g during the transitional period. METHODS This was a prospective observational study conducted in the Coombe Women and Infants University Hospital in Dublin, Ireland. Flow patterns on the mitral and tricuspid valve, isovolumic relaxation time (IVRT), left and right ventricular output and superior vena cava flow were measured in 22 infants with a birth weight of below 1250 g at six, 12, 24 and 48 h of age. RESULTS Early filling peak velocity of the left and right ventricle increased significantly from 30.3 to 39.5 cm/sec and 26.6 to 32.1 cm/sec, respectively. IVRT of the right ventricle decreased from 70 to 57 ms, and there was a nonsignificant decrease in IVRT of the left ventricle from 61.6 to 54 ms over the first 48 h. CONCLUSION We have demonstrated that parameters of diastolic ventricular function change significantly over the first 48 h of life in preterm infants <1250 g and that these changes may represent early diastolic dysfunction during the transitional period.
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Affiliation(s)
- J Sirc
- Department of Paediatric and Newborn Medicine; Coombe Women and Infants University Hospital; Dublin Ireland
- Neonatal Intensive Care Unit; Institute for the Care of Mother and Child; Prague Czech Republic
- Third Faculty of Medicine; Charles University; Prague Czech Republic
| | - E M Dempsey
- Department of Neonatology; Cork University Maternity Hospital; Cork Ireland
- Department of Paediatrics and Child Health; University College Cork; Cork Ireland
| | - J Miletin
- Department of Paediatric and Newborn Medicine; Coombe Women and Infants University Hospital; Dublin Ireland
- Neonatal Intensive Care Unit; Institute for the Care of Mother and Child; Prague Czech Republic
- Department of Paediatrics; UCD School of Medicine and Medical Sciences; Dublin Ireland
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27
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Chung HT, Huang YL, Yeh KW, Huang JL. Subclinical deterioration of left ventricular function in patients with juvenile-onset systemic lupus erythematosus. Lupus 2014; 24:263-72. [PMID: 25301677 DOI: 10.1177/0961203314554249] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVES Patients with systemic lupus erythematosus (SLE) have a higher risk of myocardial involvement, which can result in ventricular dysfunction. Little is known about the chronic influence of SLE on heart function in children and adolescents. This is the first study to demonstrate long-term changes in left ventricular function in patients with juvenile-onset SLE. METHODS This was a longitudinal study of 92 patients with juvenile-onset SLE. Two-dimensional echocardiography was performed by a single pediatric cardiologist at baseline, with follow-up at six-month intervals. Clinical and laboratory parameters, disease activity, treatment, nailfold capillaroscopy, and the traditional risk factors for atherosclerosis were evaluated. The baseline comparison of ventricular function was performed against 50 age-matched controls, and the follow-up results were analyzed using generalized estimating equations. RESULTS The patients' mean age at baseline was 15.9 ± 4.3 years, the mean disease duration was 3.6 ± 3.2 years, and the mean follow-up duration was 4.5 ± 1.6 years. At baseline, the mean left ventricular ejection fraction (LVEF) was 74.7 ± 5.6% and the mean E/A ratio of left ventricular diastolic filling was 1.7 ± 0.3 (E: the peak velocity at rapid left ventricular filling; A: the peak velocity during left atrial contraction). The LVEF of the SLE patients was similar to the healthy controls and it did not change during the follow-up period. In contrast, the E/A ratio was lower in the SLE patients than in the healthy controls (1.7 ± 0.3 versus 1.88 ± 0.37; p = 0.002), and it decreased significantly with time (B ± SE, -0.013 ± 0.006, p = 0.023). In multiple analyses, abnormal microvasculature in nailfold capillaroscopy had a negative effect on LVEF progression (p = 0.039). Disease duration of SLE and proteinuria were risk factors associated with the descent of E/A ratio (p = 0.014 and p = 0.015, respectively). CONCLUSION In patients with juvenile-onset SLE who were free of cardiac symptoms, there was evidence of declining ventricular diastolic function with time. Abnormal nailfold microvasculature, proteinuria and longer disease duration were the main risk factors for worsening of ventricular function.
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Affiliation(s)
- H-T Chung
- Division of Cardiology, Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Y-L Huang
- Department of Pediatrics, Chang Gung Memorial Hospital at Keelung, Keelung, Taiwan Graduate Institute of Clinical Medical Science, Chang Gung University, Taoyuan, Taiwan
| | - K-W Yeh
- Division of Asthma, Allergy, and Rheumatology, Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - J-L Huang
- Graduate Institute of Clinical Medical Science, Chang Gung University, Taoyuan, Taiwan Division of Asthma, Allergy, and Rheumatology, Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
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28
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Elbaz MSM, Calkoen EE, Westenberg JJM, Lelieveldt BPF, Roest AAW, van der Geest RJ. Vortex flow during early and late left ventricular filling in normal subjects: quantitative characterization using retrospectively-gated 4D flow cardiovascular magnetic resonance and three-dimensional vortex core analysis. J Cardiovasc Magn Reson 2014; 16:78. [PMID: 25270083 PMCID: PMC4177574 DOI: 10.1186/s12968-014-0078-9] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 09/01/2014] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND LV diastolic vortex formation has been suggested to critically contribute to efficient blood pumping function, while altered vortex formation has been associated with LV pathologies. Therefore, quantitative characterization of vortex flow might provide a novel objective tool for evaluating LV function. The objectives of this study were 1) assess feasibility of vortex flow analysis during both early and late diastolic filling in vivo in normal subjects using 4D Flow cardiovascular magnetic resonance (CMR) with retrospective cardiac gating and 3D vortex core analysis 2) establish normal quantitative parameters characterizing 3D LV vortex flow during both early and late ventricular filling in normal subjects. METHODS With full ethical approval, twenty-four healthy volunteers (mean age: 20±10 years) underwent whole-heart 4D Flow CMR. The Lambda2-method was used to extract 3D LV vortex ring cores from the blood flow velocity field during early (E) and late (A) diastolic filling. The 3D location of the center of vortex ring core was characterized using cylindrical cardiac coordinates (Circumferential, Longitudinal (L), Radial (R)). Comparison between E and A filling was done with a paired T-test. The orientation of the vortex ring core was measured and the ring shape was quantified by the circularity index (CI). Finally, the Spearman's correlation between the shapes of mitral inflow pattern and formed vortex ring cores was tested. RESULTS Distinct E- and A-vortex ring cores were observed with centers of A-vortex rings significantly closer to the mitral valve annulus (E-vortex L=0.19±0.04 versus A-vortex L=0.15±0.05; p=0.0001), closer to the ventricle's long-axis (E-vortex: R=0.27±0.07, A-vortex: R=0.20±0.09, p=0.048) and more elliptical in shape (E-vortex: CI=0.79±0.09, A-vortex: CI=0.57±0.06; <0.001) compared to E-vortex. The circumferential location and orientation relative to LV long-axis for both E- and A-vortex ring cores were similar. Good to strong correlation was found between vortex shape and mitral inflow shape through both the annulus (r=0.66) and leaflet tips (r=0.83). CONCLUSIONS Quantitative characterization and comparison of 3D vortex rings in LV inflow during both early and late diastolic phases is feasible in normal subjects using retrospectively-gated 4D Flow CMR, with distinct differences between early and late diastolic vortex rings.
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Affiliation(s)
- Mohammed S M Elbaz
- />Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, C3-Q room 54, Albinusdreef 2, Leiden, 2333 ZA The Netherlands
| | - Emmeline E Calkoen
- />Department of Paediatric Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jos J M Westenberg
- />Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, C3-Q room 54, Albinusdreef 2, Leiden, 2333 ZA The Netherlands
| | - Boudewijn P F Lelieveldt
- />Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, C3-Q room 54, Albinusdreef 2, Leiden, 2333 ZA The Netherlands
- />Department of Intelligent Systems, Delft University of Technology, Delft, The Netherlands
| | - Arno A W Roest
- />Department of Paediatric Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Rob J van der Geest
- />Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, C3-Q room 54, Albinusdreef 2, Leiden, 2333 ZA The Netherlands
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Moorhead KT, Paeme S, Chase JG, Kolh P, Pierard L, Hann CE, Dauby PC, Desaive T. A simplified model for mitral valve dynamics. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2013; 109:190-196. [PMID: 22119761 DOI: 10.1016/j.cmpb.2011.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 10/27/2011] [Accepted: 10/27/2011] [Indexed: 05/31/2023]
Abstract
Located between the left atrium and the left ventricle, the mitral valve controls flow between these two cardiac chambers. Mitral valve dysfunction is a major cause of cardiac dysfunction and its dynamics are little known. A simple non-linear rotational spring model is developed and implemented to capture the dynamics of the mitral valve. A measured pressure difference curve was used as the input into the model, which represents an applied torque to the anatomical valve chords. A range of mechanical model hysteresis states were investigated to find a model that best matches reported animal data of chord movement during a heartbeat. The study is limited by the use of one dataset found in the literature due to the highly invasive nature of getting this data. However, results clearly highlight fundamental physiological issues, such as the damping and chord stiffness changing within one cardiac cycle, that would be directly represented in any mitral valve model and affect behaviour in dysfunction. Very good correlation was achieved between modeled and experimental valve angle with 1-10% absolute error in the best case, indicating good promise for future simulation of cardiac valvular dysfunction, such as mitral regurgitation or stenosis. In particular, the model provides a pathway to capturing these dysfunctions in terms of modeled stiffness or elastance that can be directly related to anatomical, structural defects and dysfunction.
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Affiliation(s)
- K T Moorhead
- Cardiovascular Research Center, University of Liège, 17 Allée du 6 Août, Liège 4000, Belgium
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30
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Kwinta P, Jagła M, Grudzień A, Klimek M, Zasada M, Pietrzyk JJ. From a regional cohort of extremely low birth weight infants: cardiac function at the age of 7 years. Neonatology 2013; 103:287-92. [PMID: 23548517 DOI: 10.1159/000348251] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 01/21/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND The long-term impact of prematurity on cardiac structure and function has not yet been fully discovered. OBJECTIVES To assess long-term cardiac complications in the regional cohort of extremely low birth weight (ELBW) children born in 2002-2004. MATERIAL AND METHODS Eighty-one children born as ELBW infants (91% of the available cohort) with a median birth weight of 890 g (25-75th percentile: 760-950) were evaluated at the mean age of 6.7 years. The control group included 40 children born full-term, selected from one general practice in the district. Echocardiography and 24-hour ambulatory blood pressure measurements (ABPM) were performed. The primary outcome variable was the presence of cardiac complications such as left ventricular hypertrophy (LVH), diastolic dysfunction or systolic dysfunction. RESULTS LVH was diagnosed in 4/81 ELBW children and 2/40 control children (p = 1.0). Concentric remodeling was detected in 8 (10%) subjects from the ELBW group and in 2 (5%) from the control group (p = 0.49). There were no patients with diastolic or systolic dysfunction in either group. After having expressed the results of M-mode echocardiography as z-scores for body surface area (BSA), statistically significant differences were observed for right-ventricle dimension in diastole (-1.49 ± 1.25 vs. -0.31 ± 0.91; p < 0.001), LV inner dimension in diastole (-0.53 ± 1.26 vs. 0.13 ± 0.94; p = 0.01) and left atrium (-0.93 ± 1.07 vs. -0.15 ± 1.02; p < 0.01). Heart rate (HR) was significantly faster in ELBW children (92.9 ± 8.4 vs. 86.7 ± 7.4 bpm; p = 0.01 adjusted for BSA) and they also had significantly higher night-time blood pressure [mean (z-score): 1.15 vs. 0.2; p = 0.02] without nocturnal dipping (night-time dipping <10%: 13 (16.7%) vs. 2 (5.2%), p = 0.13). CONCLUSIONS No differences were found between the groups in the occurrence of cardiac complications. Ex-preterm ELBW children at age 6 may have a faster HR, smaller cardiac dimensions on echocardiography and higher nocturnal blood pressure. The clinical relevance of these findings is unknown.
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Affiliation(s)
- Przemko Kwinta
- Department of Pediatrics, Jagiellonian University Medical College, Cracow, Poland.
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Cantinotti M, Lopez L. Nomograms for blood flow and tissue Doppler velocities to evaluate diastolic function in children: a critical review. J Am Soc Echocardiogr 2012; 26:126-41. [PMID: 23261147 DOI: 10.1016/j.echo.2012.11.017] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Indexed: 10/27/2022]
Abstract
Interest in diastolic function in children has increased recently. However, the strengths and limitations of published pediatric nomograms for echocardiographic diastolic parameters have not been critically evaluated, especially in the neonatal population. A literature search was performed within the National Library of Medicine using the keywords normal/reference values, power Doppler/tissue Doppler velocities, and children/neonates. The search was further refined by adding the keywords diastolic function, myocardial, mitral/tricuspid inflow, pulmonary vein, and Tei index. Thirty-three published studies evaluating diastolic function in normal children were included in this review. In many studies, sample sizes were limited, particularly in terms of neonates. There was heterogeneity in the methodologies to perform and normalize measurements and to express normalized data (Z scores, percentiles, and mean values). Although most studies adjusted measurements for age, classification by specific age subgroups varied, and few addressed the relationships of measurements to body size and heart rate (especially with higher neonatal heart rates). Although reference values were reproducible in older children, they varied significantly in neonates and infants. Pediatric diastolic nomograms are limited by small sample sizes and inconsistent methodologies for the performance and normalization of measurements, with few data on neonates. Some studies do reveal reproducible patterns in diastolic function in older children. A comprehensive pediatric nomogram of diastolic function involving a large population of normal infants and older children and using standardized methodology is warranted and would have tremendous impact in the care of children with acquired and congenital heart disease.
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Bergman G, Eliasson H, Mohlkert LA, Wahren-Herlenius M, Sonesson SE. Progression to first-degree heart block in preschool children exposed in utero to maternal anti-SSA/Ro52 autoantibodies. Acta Paediatr 2012; 101:488-93. [PMID: 22175870 DOI: 10.1111/j.1651-2227.2011.02563.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To study the children exposed in utero to maternal anti-SSA/Ro52 antibodies in terms of impaired atrioventricular (AV) conduction or disturbed myocardial performance, and to investigate the ability of prenatal Doppler to predict conduction abnormalities during childhood. METHODS Fifty-seven children exposed in utero to anti-SSA/Ro52 antibodies were grouped in accordance with (A) prolonged AV time intervals in utero by Doppler or (B) normal findings and examined by ECG, 24-hour ECG and echocardiography. RESULTS PR interval on ECG was longer in group A (n = 16) compared with that of group B (n = 41), 140 ± 24 ms vs. 121 ± 13 ms (p < 0.01). Six cases of 1°Atrioventricular block (AVB) developed in group A, giving an estimated prevalence of 10.5%, (95% confidence interval; 4.4-22.2%), progressing from normal sinus rhythm at 1 month of age. Prenatal Doppler predicted development of 1°AVB at follow-up with a sensitivity of 100%, Positive predictive value (PPV) 37.5%, LR+ 5.1, and Negative predictive value (NPV) 100%. Children in group A had a slightly higher myocardial performance index in flow and tissue Doppler imaging recordings. CONCLUSIONS Ten per cent of children exposed in utero to anti-SSA/Ro52, with a normal ECG at birth or 1 month of age, progressed to 1°AVB during preschool years. Cases at risk can be identified by prenatal Doppler echocardiography.
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Affiliation(s)
- Gunnar Bergman
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
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Regner SR, Lagedrost SJ, Plappert T, Paulsen EK, Friedman LS, Snyder ML, Perlman SL, Mathews KD, Wilmot GR, Schadt KA, Sutton MSJ, Lynch DR. Analysis of echocardiograms in a large heterogeneous cohort of patients with friedreich ataxia. Am J Cardiol 2012; 109:401-5. [PMID: 22078220 DOI: 10.1016/j.amjcard.2011.09.025] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 09/29/2011] [Accepted: 09/29/2011] [Indexed: 12/29/2022]
Abstract
Although Friedreich ataxia (FA) is associated with cardiomyopathy, the severity and evolution of cardiac disease is poorly understood. To identify factors predicting cardiomyopathy in FA, we assessed echocardiograms from a large heterogenous cohort and their relation to disease traits. The most recent echocardiograms from 173 subjects with FA were analyzed in a core laboratory to determine their relation to disease duration, subject age, age of onset, functional disability score, and GAA repeat length. Mean age of the cohort was 19.7 years, mean age of disease onset was 10.6 years, and mean shorter GAA length was 681 repeats. Echocardiograms collectively illustrated systolic dysfunction, diastolic dysfunction, and hypertrophy. Measurements of hypertrophy correlated moderately with each other (r = 0.39 to 0.79) but not with measurements of diastolic dysfunction (r <0.35). Diastolic measurements correlated poorly with each other, although 26% of the cohort had multiple diastolic abnormalities. The most common diastolic dysfunction classification was pseudonormalization. Classification of diastolic dysfunction was predicted by GAA repeat length but not by age or gender. Ejection fraction was below normal in 20% of the cohort. In linear regression analysis, increasing age predicted decreasing ejection fraction. Functional disability score, a measurement of neurologic ability, did not predict any echocardiographic measurements. In conclusion, hypertrophy and diastolic and systolic dysfunctions occur in FA and are substantially independent; diastolic dysfunction is the most common abnormality with most patients having an assigned diastolic dysfunction class of pseudonormalization.
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Affiliation(s)
- Sean R Regner
- Department of Neurology, University of Pennsylvania, Medical School, Philadelphia, Pennsylvania, USA
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Mertens L, Seri I, Marek J, Arlettaz R, Barker P, McNamara P, Moon-Grady AJ, Coon PD, Noori S, Simpson J, Lai WW. Targeted Neonatal Echocardiography in the Neonatal Intensive Care Unit: practice guidelines and recommendations for training. Writing Group of the American Society of Echocardiography (ASE) in collaboration with the European Association of Echocardiography (EAE) and the Association for European Pediatric Cardiologists (AEPC). J Am Soc Echocardiogr 2012; 24:1057-78. [PMID: 21933743 DOI: 10.1016/j.echo.2011.07.014] [Citation(s) in RCA: 236] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Luc Mertens
- The Labatt Family Heart Center, The Hospital for Sick Children, Toronto, Ontario, Canada
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Abstract
OBJECTIVE Research regarding the influence of mental stress (MS) on heart function focused primarily on heart contractility. We hypothesized that MS results in attenuated diastolic function (DF) as early as in adolescence and this effect may differ by race and sex. METHODS 161 normotensive adolescents (81 blacks and 80 females) performed resting (control) and MS (experimental) conditions on separate visits. Visits lasted for 3 hours (1-hour rest, video game challenge and recovery for experimental visit. Mitral inflow early (E) to late (A) filling velocities (E/A) ratio; mitral valve annular early velocity (E') and E/E' ratio were recorded every 30 minutes to evaluate DF. RESULTS BP and HR increased during experimental visit (all p values < .01). E/A ratio progressively increased during control visit (mean [SE], from 1.93 ± 0.42 to 2.01 ± 0.47) but decreased during the stress phase of experimental visit (from 1.91 ± 0.44 to 1.87 ± 0.50, p interaction < .001). In white males, E' increased from rest to stress phase (from 10.3 ± 2.55 to 10.7 ± 2.28 cm/s), whereas E' decreased in white females (from 11.0 ± 2.62 to 10.6 ± 2.53 cm/s), black males (from 10.5 ± 2.31 to 9.9 ± 2.19 cm/s), and black females (from 10.6 ± 2.22 to 10.3 ± 1.86 cm/s, p interaction < .04). During stress, higher A was associated with higher E/E' ratio. CONCLUSIONS Recurrent episodes of mental stress may increase the risk of poor DF, and these adverse effects may be stronger in females and black males.
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Mertens L, Seri I, Marek J, Arlettaz R, Barker P, McNamara P, Moon-Grady AJ, Coon PD, Noori S, Simpson J, Lai WW. Targeted Neonatal Echocardiography in the Neonatal Intensive Care Unit: Practice Guidelines and Recommendations for Training: Writing group of the American Society of Echocardiography (ASE) in collaboration with the European Association of Echocardiography (EAE) and the Association for European Pediatric Cardiologists (AEPC). EUROPEAN JOURNAL OF ECHOCARDIOGRAPHY 2011; 12:715-36. [PMID: 21998460 DOI: 10.1093/ejechocard/jer181] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Luc Mertens
- The Labatt Family Heart Center, The Hospital for Sick Children, Toronto, Ontario, Canada
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Senzaki H, Kumakura R, Ishido H, Masutani S, Seki M, Yoshiba S. Left Atrial Systolic Force in Children: Reference Values for Normal Children and Changes in Cardiovascular Disease With Left Ventricular Volume Overload or Pressure Overload. J Am Soc Echocardiogr 2009; 22:939-46. [DOI: 10.1016/j.echo.2009.05.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Indexed: 10/20/2022]
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Kanegaye JT, Wilder MS, Molkara D, Frazer JR, Pancheri J, Tremoulet AH, Watson VE, Best BM, Burns JC. Recognition of a Kawasaki disease shock syndrome. Pediatrics 2009; 123:e783-9. [PMID: 19403470 PMCID: PMC2848476 DOI: 10.1542/peds.2008-1871] [Citation(s) in RCA: 267] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE We sought to define the characteristics that distinguish Kawasaki disease shock syndrome from hemodynamically normal Kawasaki disease. METHODS We collected data prospectively for all patients with Kawasaki disease who were treated at a single institution during a 4-year period. We defined Kawasaki disease shock syndrome on the basis of systolic hypotension for age, a sustained decrease in systolic blood pressure from baseline of > or =20%, or clinical signs of poor perfusion. We compared clinical and laboratory features, coronary artery measurements, and responses to therapy and analyzed indices of ventricular systolic and diastolic function during acute and convalescent Kawasaki disease. RESULTS Of 187 consecutive patients with Kawasaki disease, 13 (7%) met the definition for Kawasaki disease shock syndrome. All received fluid resuscitation, and 7 (54%) required vasoactive infusions. Compared with patients without shock, patients with Kawasaki disease shock syndrome were more often female and had larger proportions of bands, higher C-reactive protein concentrations, and lower hemoglobin concentrations and platelet counts. Evidence of consumptive coagulopathy was common in the Kawasaki disease shock syndrome group. Patients with Kawasaki disease shock syndrome more often had impaired left ventricular systolic function (ejection fraction of <54%: 4 of 13 patients [31%] vs 2 of 86 patients [4%]), mitral regurgitation (5 of 13 patients [39%] vs 2 of 83 patients [2%]), coronary artery abnormalities (8 of 13 patients [62%] vs 20 of 86 patients [23%]), and intravenous immunoglobulin resistance (6 of 13 patients [46%] vs 32 of 174 patients [18%]). Impairment of ventricular relaxation and compliance persisted among patients with Kawasaki disease shock syndrome after the resolution of other hemodynamic disturbances. CONCLUSIONS Kawasaki disease shock syndrome is associated with more-severe laboratory markers of inflammation and greater risk of coronary artery abnormalities, mitral regurgitation, and prolonged myocardial dysfunction. These patients may be resistant to immunoglobulin therapy and require additional antiinflammatory treatment.
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Affiliation(s)
- John T. Kanegaye
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
,Division of Emergency Medicine, Rady Children’s Hospital San Diego, San Diego, California
| | - Matthew S. Wilder
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
| | - Delaram Molkara
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
,Division of Cardiology, Rady Children’s Hospital San Diego, San Diego, California
| | - Jeffrey R. Frazer
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
,Division of Cardiology, Rady Children’s Hospital San Diego, San Diego, California
| | - Joan Pancheri
- Center for Pediatric Clinical Research, Rady Children’s Hospital San Diego, San Diego, California
| | - Adriana H. Tremoulet
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
,Division of Infectious Diseases, Rady Children’s Hospital San Diego, San Diego, California
| | - Virginia E. Watson
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
| | - Brookie M. Best
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
,Department of Pharmacy, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California
| | - Jane C. Burns
- Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla, California
,Division of Allergy, Immunology, and Rheumatology, Rady Children’s Hospital San Diego, San Diego, California
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Lee CH, Kim JK, Jin HS, Park KY, Kim BS, Han MK. Variation of parameters according to cardiac cycle length, evaluated by TDI in children. KOREAN JOURNAL OF PEDIATRICS 2009. [DOI: 10.3345/kjp.2009.52.3.339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Chang-Hyun Lee
- Department of Pediatrics, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea
| | - Jae-Kwang Kim
- Department of Pediatrics, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea
| | - Hyun-Seung Jin
- Department of Pediatrics, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea
| | - Kie-Young Park
- Department of Pediatrics, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea
| | - Bong-Seong Kim
- Department of Pediatrics, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea
| | - Myung-Ki Han
- Department of Pediatrics, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea
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Kapuku GK, Davis HC, Shah N, McMillan AM, Harshfield GA. Gender differences in diastolic function among youth. Pediatr Cardiol 2008; 29:102-7. [PMID: 17899243 DOI: 10.1007/s00246-007-9093-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 06/27/2007] [Accepted: 06/28/2007] [Indexed: 10/22/2022]
Abstract
BACKGROUND Youth were studied to determine the influence of gender on diastolic function, which has been shown to express abnormalities early in the course of congestive heart failure. METHODS The study participants were 121 normotensive individuals (53 girls, 68 boys) ages 14 to 18 years. Demographics, hemodynamics, and Doppler-derived indices of diastolic function were collected. Dependent measures of diastolic function were the ratio of early (E) to late (A) peak filling velocities and the isovolumetric relaxation time (IVRT). RESULTS The girls had a higher relative wall thickness (RWT) (36.58% +/- 4.59% vs 34.60% +/- 4.01%; p < 0.02), higher A (48.40 +/- 8.47 cm/s vs 42.36 +/- 10.43 cm/s; p < 0.001), a lower E/A ratio (1.96 +/- 0.40 vs 2.38 +/- 0.68; p < 0.01), and a shorter IVRT (51.80 +/- 11.14 ms vs 59.00 +/- 14.36 ms; p < 0.01) than the boys. The differences in deceleration time were not significant (181.30 +/- 81.33 ms vs 170.30 +/- 31.06 ms). Hierarchical stepwise regression analysis predicting E/A ratio found gender (male > female) to be the best predictor (R (2 )= 0.09) followed by heart rate (R (2) increase = 0.07; total R (2 )= 0.15; p < 0.01) and by RWT (R (2) increase = 0.05; total R (2 )= 0.21; p < 0.015). For IVRT prediction, gender (male > female) was the best predictor (R (2 )= 0.11), followed by total peripheral resistance (R (2) increase = 0.06; total R (2 )= 0.17; p < 0.017). CONCLUSION The study data indicate that gender differences in diastolic function exist already in youth. Girls show a higher RWT, a lower E/A ratio, and a shorter IVRT. The implications of these differences for cardiovascular morbidity and mortality of the two genders require attention.
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Affiliation(s)
- G K Kapuku
- Georgia Prevention Institute, Department of Pediatrics, Medical College of Georgia, MCG Annex H.S. 1640, Augusta, GA 30912-4534, USA.
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Cui W, Roberson DA, Chen Z, Madronero LF, Cuneo BF. Systolic and diastolic time intervals measured from Doppler tissue imaging: normal values and Z-score tables, and effects of age, heart rate, and body surface area. J Am Soc Echocardiogr 2007; 21:361-70. [PMID: 17628402 DOI: 10.1016/j.echo.2007.05.034] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2007] [Indexed: 10/23/2022]
Abstract
The aim of this study was to develop normal values, including Z-score tables when appropriate, for systolic time (St) and diastolic time (Dt) intervals measured by Doppler tissue imaging (DTI) and to determine the effects of age, heart rate (HR), and body surface area on DTI-derived time intervals in children. We studied 593 children with normal echocardiogram results. Developmental factors ranged from age 1 day to 18 years, HR 46 to 182/min, and body surface area 0.08 to 2.80 m(2). A total of 7 DTI-derived time interval parameters were studied. Five time interval parameters were measured from DTI: isovolumic contraction time (IVCT), isovolumic relaxation time (IVRT), ejection time, St, and Dt. In addition, we calculated the Tei index (TX) and St/Dt. We sampled longitudinal directed DTI waves from 3 sites: mitral annulus, basal interventricular septum, and tricuspid annulus from an apical 4-chamber view. Parameters were measured in each case from a single echocardiogram during times of hemodynamic stability. By univariate analysis all 7 time intervals at each of the 3 sampling sites correlated with age, HR, and body surface area (P < .001-P < .003), except the mitral annulus TX (P = .1). The following results are all based on multivariate analysis. IVCT, IVRT, and TX correlated best with age at all 3 sites (P < .001). However, when we corrected for HR by dividing by square root(R)-R interval, both corrected IVCT and corrected IVRT became constants at all 3 sites. The change in TX with age was very small and not clinically significant. Therefore, for practical clinical purposes, corrected IVCT, corrected IVRT, and TX were constant at all 3 sites. Ejection time, St, Dt, and St/Dt correlated best with HR at all 3 sites (P < .001). Ejection time, St, and Dt all decreased at faster HRs, whereas St/Dt increased at faster HRs.
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Affiliation(s)
- Wei Cui
- Heart Institute for Children, Oaklawn, Oaklawn, Illinois 60453, USA
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Meijler FL, Strackee J. Evolution and Scaling of Atrioventricular Conduction Time in Mammals: Part 1. ACTA ACUST UNITED AC 2006; 4:53-7; quiz 58. [PMID: 16470106 DOI: 10.1111/j.1541-9215.2006.04383.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Scaling can be defined as the adjustment of a structure, a function, or an organ to the size of the mammalian body. An example is the size of the heart in relation to the size of the body. The duration of the PR interval on the electrocardiogram (atrioventricular delay) in relation to the size of the heart is a perplexing example of scaling. During evolution, mammalian species changed their shape, size, and function while adapting to the habitat in which they had to live and survive. This review deals with the problem of the apparent mismatch in scaling of the atrioventricular delay (PR interval) in relation to the size of the mammalian heart from mouse to whale.
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Affiliation(s)
- Frits L Meijler
- Interuniversity Cardiology Institute of the Netherlands, Utrecht, The Netherlands.
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Kurotobi S, Kawakami N, Shimizu K, Aoki H, Nasuno S, Takahashi K, Kogaki S, Ozono K. Brain natriuretic peptide as a hormonal marker of ventricular diastolic dysfunction in children with Kawasaki disease. Pediatr Cardiol 2005; 26:425-30. [PMID: 15633045 DOI: 10.1007/s00246-004-0812-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although an increased level of serum brain natriuretic peptide (BNP) has been reported in children in the acute phase of Kawasaki disease (KD), no precise relation was documented between the serum BNP level and left ventricular (LV) systolic function. We hypothesized that the increased BNP levels may be explained by diastolic abnormalities in those with KD. We prospectively studied 25 patients in the acute phase of KD. Patients with abnormal systolic function were excluded. Pediatric cardiologists making the assessment of LV diastolic function were blinded to the BNP levels. Doppler interrogation was applied to measure LV inflow velocities, which were transformed to z scores using control measurements obtained from 83 healthy subjects. In the patients, the BNP levels ranged from 2.0 to 450.0 pg/ml, with a mean of 54.0 +/- 102.8 pg/ml. Six patients with abnormal velocities (> 2 SD in z score) showed significantly higher levels of BNP (152 +/- 173 pg/ml) than those in the remaining patients (p < 0.01). The BNP levels correlated positively with diastolic atrial velocity in z score (r = 0.51, p < 0.05), and negatively with diastolic early velocity to atrial velocity ratio in z score (r = -0.75, p < 0.01). This study suggests that LV diastolic dysfunction may occur in some children in the acute phase of KD, causing an increased level of BNP.
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Affiliation(s)
- S Kurotobi
- Department of Developmental Medicine, Pediatrics, D-5, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, 565-0871, Suita, Japan.
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Larrazet F, Bouabdallah K, Le Bret E, Vouhé P, Veyrat C, Laborde F. Tissue Doppler echocardiographic and color M-mode estimation of left atrial pressure in infants. Pediatr Crit Care Med 2005; 6:448-53. [PMID: 15982433 DOI: 10.1097/01.pcc.0000164345.86775.35] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Using recorded flow and tissue Doppler, we evaluated the relation of peak velocity of early transmitral Doppler filling (E)/early diastolic velocity of the lateral mitral annulus (Ea) ratio and of E/flow propagation velocity (Vp) ratio to mean left atrial pressure in infants after surgery for congenital heart disease. DESIGN Experimental design. SETTING Pediatric intensive care unit. PATIENTS Thirty-seven infants aged 4 (3-8) months. INTERVENTIONS Patients underwent postoperative invasive hemodynamic monitoring with simultaneously obtained Doppler measurements. MEASUREMENTS AND MAIN RESULTS Values are expressed as median (25th-75th percentiles). Heart rate was 145 (135-157) beats/min. Left atrial pressure was 10 (8-12) mm Hg with E/Ea 16 (12-19) and E/Vp 1.9 (1.3-2.4). E/Ea and E/Vp ratios were higher in patients with left atrial pressure >10 mm Hg (n = 18), than in patients with left atrial pressure < or =10 mm Hg (n = 19) (E/Ea, 16 [15-25] vs. 12 [9-17], p = .01; E/Vp, 2.3 [1.9-2.8] vs. 1.4 [1-1.9]. respectively, p = .001). At a cutoff point of 15, E/Ea sensitivity for left atrial pressure >10 mm Hg was 17 of 18 (94%) with specificity 13 of 18 (72%). At a cutoff point of 2, E/Vp sensitivity for left atrial pressure >10 mm Hg was 15 of 18 (83%) with specificity 16 of 18 (89%). Areas under the receiver operating characteristic curves were 0.76 (E/Ea) and 0.83 (E/Vp). CONCLUSIONS Doppler ratios might be considered as promising noninvasive tools for left atrial pressure evaluation in infants after cardiac surgery.
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Affiliation(s)
- Fabrice Larrazet
- Department of Cardiology, Institut Mutualiste Montsouris, Paris, France
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Meijler FL, Billette J, Jalife J, Kik MJL, Reiber JHC, Stokhof AA, Westenberg JJM, Wassenaar C, Strackee J. Atrioventricular conduction in mammalian species: Hemodynamic and electrical scaling. Heart Rhythm 2005; 2:188-96. [PMID: 15851297 DOI: 10.1016/j.hrthm.2004.11.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2004] [Accepted: 11/10/2004] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The purpose of this study was to investigate scaling of the duration of late diastolic left ventricular (LV) filling in relation to AV conduction time (delay) (PR interval on the ECG) in mammals. BACKGROUND From mouse to whale, AV delay increases 10-fold, whereas body mass increases one million-fold. The apparent "mismatch" results from scaling of AV delay versus body and heart mass. METHODS We measured (1) mitral orifice diameter in 138 postmortem hearts of 48 mammalian species weighing between 17 g and 250 kg and (2) transmitral diastolic flow using magnetic resonance imaging (MRI) recordings of 10 healthy human individuals. (3) We visually inspected early and late diastolic LV filling. (4) We developed two physical models to explain scaling of late diastolic LV filling time. RESULTS (1) Diameter of the mitral orifice proportionally relates to heart length (third root of heart mass). (2) Atrial contraction starts at a fixed instant (+/- 80%) of the (normalized) cardiac cycle and contributes 31% +/- 5% to LV filling. (3) MRI shows that during diastole, the left atrium (LA) and LV form a single space. (4) The physical models relate the duration of late diastolic LV filling directly to heart length, the third root of heart mass. CONCLUSIONS (1) Late diastolic (LV) filling time scales with heart length (third root of heart mass). (2) No "mismatch" exists between AV delay and heart size. (3) Knowledge of the actual starting time of atrial contraction may contribute to better treatment of patients with heart failure. (4) The findings suggest that in evolution of mammalian species, hemodynamics commands electrical behavior of the heart.
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Affiliation(s)
- Frits L Meijler
- Interuniversity Cardiology Institute (ICIN) of the Netherlands, Utrecht.
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Schmitz L, Xanthopoulos A, Koch H, Lange PE. Doppler flow parameters of left ventricular filling in infants: how long does it take for the maturation of the diastolic function in a normal left ventricle to occur? Pediatr Cardiol 2004; 25:482-91. [PMID: 15185047 DOI: 10.1007/s00246-003-0605-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To study the impact of the maturational process of diastolic left ventricular function on trans-mitral Doppler flow parameters. METHODS AND PARTICIPANTS In a survey we examined pulsed-wave Doppler signals and diastolic time intervals from 238 healthy neonates and infants. Using multiple linear regression analysis, we evaluated the impact of physiological determinants on parameter expression. RESULTS Early-filling and atrial-filling peak velocities, early-filling acceleration and deceleration rates, and the atrial-filling time velocity integral reached a climax within 2 months after birth, while early-filling time velocity integral followed increasing throughout the study period. The isovolumic relaxation time was found to be significantly longer for neonates than for infants older than 2 months. The observed parameter movements could be attributed to changes of stroke volume and mitral valve area for early filling-time velocity integral (R2 = 0.93), and of heart rate, stroke volume, and mitral valve area for early filling peak velocity (R2 = 0.84), and atrial-filling time velocity integral (R2 = 0.65). Isovolumic relaxation time and atrial-filling peak velocity became heart rate dependent not before 3 months after birth. CONCLUSIONS The observed parameter changes are powerful indicators for the maturational process in diastolic function. This process is mainly completed by 3 months of age.
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Affiliation(s)
- L Schmitz
- Department of Pediatric Cardiology, Charité Medical Center, Humboldt-University of Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.
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Kozák-Bárány A, Jokinen E, Kero P, Tuominen J, Rönnemaa T, Välimäki I. Impaired left ventricular diastolic function in newborn infants of mothers with pregestational or gestational diabetes with good glycemic control. Early Hum Dev 2004; 77:13-22. [PMID: 15113627 DOI: 10.1016/j.earlhumdev.2003.11.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/24/2003] [Indexed: 11/28/2022]
Abstract
THE AIM OF THE STUDY We assessed by echocardiography the left ventricular systolic and diastolic function in newborn infants of mothers with well-controlled pregestational type 1 or gestational diabetes (IDM) in comparison to normal term neonates. SUBJECTS AND METHODS Two-dimensional/M-mode and Doppler transmitral flow velocity measurements were performed in 18 IDM and 26 control infants of non-diabetic mothers (gestational ages 36-40 and 36-41 weeks, respectively) between days 2 and 5 after birth. In the IDM, there were nine mothers with pregestational (White class C or D) and nine mothers with gestational diabetes (White class A or A/B). Peak early and atrial filling velocity, early deceleration time, early acceleration time, early, atrial and total time velocity integrals were used to examine the left ventricular diastolic performance. We also calculated the early/atrial velocity ratio, early/atrial integral ratio and early/total integral ratio. The fractional shortening, fractional shortening area, midwall fractional shortening (mFS), left ventricular mass and indexed left ventricular mass for body surface area (BSA) and birth weight were used in assessment of left ventricular systolic performance. RESULTS The early deceleration time was longer, resulting in higher early integral and early filling fraction (EFF) in the IDM than in the control infants (p<0.01). In the IDM, the fractional shortening was somewhat greater and the left ventricular mass/body surface area ratio was higher than in the control group (p<0.05), although the measures of systolic performance were within the normal range. There were no significant differences in the systolic or diastolic function parameters between the gestational and pregestational groups. CONCLUSION In the infants of mothers with well-controlled pregestational or gestational diabetes, we found prolonged deceleration time of early left ventricular diastolic filling, probably reflecting an impaired left ventricular relaxation rather than compliance. The mechanism for the findings may be maternal hyperglycemia during the third trimester and subsequent fetal hyperinsulinaemia leading to neonatal cardiac hypertrophy.
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Affiliation(s)
- Andrea Kozák-Bárány
- Department of Paediatrics, University of Turku, Vähä-Hämeenkatu 1A3, 20520 Turku, Finland.
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Schmitz L, Xanthopoulos A, Lange PE. Isovolumic relaxation time shortens significantly during the three months after birth. J Am Soc Echocardiogr 2004; 17:275-6. [PMID: 14981427 DOI: 10.1016/j.echo.2003.10.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Lothar Schmitz
- Department of Pediatric Cardiology, Charite Medical Center, Humboldt-University of Berlin, Berlin, Germany.
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Schmitz L, Stiller B, Pees C, Koch H, Xanthopoulos A, Lange P. Doppler-derived parameters of diastolic left ventricular function in preterm infants with a birth weight <1500 g: reference values and differences to term infants. Early Hum Dev 2004; 76:101-14. [PMID: 14757262 DOI: 10.1016/j.earlhumdev.2003.11.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Transmitral flow parameters in preterm and term infants were compared in order to study differences in signal expression and temporal dynamics of left ventricular diastolic function. In 63 preterm infants between 26 and 33 weeks of gestation and 102 term infants, a Doppler survey was performed during 6 months after birth. Early and atrial filling-time velocity integrals and peak velocities were significantly lower in the preterm neonates. Atrial filling parameters reached the level observed in term infants by 2 months of age. Peak early filling velocity was still lower for 2-month-old preterms and attained the term infants' level by 3 months of age. Preterm infants continued having high atrial filling fraction (AFF) (0.51+/-0.07) during 2 months after birth, while in term infants the fraction decreased continuously from 0.41+/-0.06 to 0.37+/-0.05. Isovolumic relaxation time (IVRT) was the only parameter without differences between preterm and term infants, and it decreased from 54+/-7 ms in neonates to 41+/-4 ms over 3 months. Stroke volume passing the mitral valve doubled in preterm (4+/-1 to 7.9+/-1.5 ml/cm2), but increased by only 37% (6.9+/-1.6 to 9.5+/-2.2 ml/cm2) in term infants. Our observations show that the maturational period of diastolic function appears prolonged in preterm infants. As preterm infants have to cope with a higher physiologic preload augmentation during growth, part of the delay in parameter changes might be caused by preload stress rather than by persistence of functional impairment. Although doing well under physiological conditions, preterm neonates may be at higher risk for diastolic dysfunction than term infants when an additional preload challenge is encountered.
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MESH Headings
- Diastole
- Ductus Arteriosus, Patent/diagnostic imaging
- Ductus Arteriosus, Patent/physiopathology
- Echocardiography, Doppler/methods
- Gestational Age
- Humans
- Infant
- Infant, Newborn
- Infant, Premature, Diseases/diagnostic imaging
- Infant, Premature, Diseases/physiopathology
- Infant, Very Low Birth Weight
- Prospective Studies
- Reference Values
- Time Factors
- Ventricular Function, Left
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Affiliation(s)
- Lothar Schmitz
- Department of Pediatric Cardiology, Charité Medical Center, Humboldt-University, Augustenburger Platz 1, D-13353 Berlin, Germany.
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Schmitz L, Stiller B, Koch H, Koehne P, Lange P. Diastolic left ventricular function in preterm infants with a patent ductus arteriosus: a serial Doppler echocardiography study. Early Hum Dev 2004; 76:91-100. [PMID: 14757261 DOI: 10.1016/j.earlhumdev.2003.11.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In very low birth weight neonates, a left-to-right shunt via persistent ductus arteriosus (PDA) may interact with diastolic left ventricular function, but specific changes of Doppler parameters have yet to be reported. In a serial transmitral Doppler study, we investigated the impact of a PDA on diastolic function parameters. Twenty-two patients with and without PDA were examined on day 3.8+/-1 and day 14+/-2 after birth. By the first examination, 13 out of 22 patients had a PDA; by the second examination, the number was still 8 out of 22. Peak early and atrial flow velocities (44.8+/-15 and 50.1+/-13 cm/s, respectively) were higher (p<0.05) for neonates with PDA compared to those with closed duct (30.9+/-6 and 34.2 cm/s, respectively). Isovolumic relaxation time (IVRT) was shorter in neonates with PDA (45+/-7 ms, N=21) compared to those with a closed duct (55.3+/-5 ms, N=23) (p<0.01). IVRT correlated inversely with cardiac index (R=-0.79, p<0.01). All observed changes reversed to the normal range after closure of the PDA. When premature infants with a PDA experience a preload challenge, early and atrial peak velocities increase and IVRT shortens significantly. This coincidence of elevated transvalvular pressure differences and decreased IVRT in neonates with immature diastolic function can best be explained as a result of left atrial pressure elevation. Consequently, pulmonary venous pressure must be elevated, with its inherent effect on pulmonary capillary physiology. Thus, the monitoring of left ventricular diastolic function adds significant information to the care of preterm infants with a PDA.
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MESH Headings
- Blood Gas Analysis
- Diastole
- Ductus Arteriosus, Patent/blood
- Ductus Arteriosus, Patent/diagnostic imaging
- Ductus Arteriosus, Patent/physiopathology
- Echocardiography, Doppler/methods
- Follow-Up Studies
- Gestational Age
- Humans
- Infant, Newborn
- Infant, Premature, Diseases/blood
- Infant, Premature, Diseases/diagnostic imaging
- Infant, Premature, Diseases/physiopathology
- Infant, Very Low Birth Weight
- Ventricular Function, Left
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Affiliation(s)
- Lothar Schmitz
- Department of Pediatric Cardiology, Charité Medical Center, Humboldt-University, Augustenburger Platz 1, D-13353 Berlin, Germany.
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