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Papolos AI, Kenigsberg BB, Austin DR, Barnett CF. Management of the peri-intubation period in patients with pulmonary arterial hypertension and respiratory failure. Curr Cardiol Rep 2024; 26:815-820. [PMID: 38913233 DOI: 10.1007/s11886-024-02081-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/10/2024] [Indexed: 06/25/2024]
Abstract
PURPOSE OF REVIEW The endotracheal intubation of patients with pulmonary arterial hypertension (PAH) in respiratory distress is a highly morbid procedure that can precipitate hemodynamic collapse. Here we review our strategy for confronting this difficult clinical situation. RECENT FINDINGS There are no clinical trials that explore best practices in the management of patients with PAH and respiratory failure. Here we provide a practical approach to respiratory support, inopressor and pulmonary vasodilator selection, hemodynamic considerations, point-of-care ultrasound monitoring, and endotracheal intubation in patients with PAH in respiratory failure.
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Affiliation(s)
- Alexander I Papolos
- Department of Critical Care, MedStar Washington Hospital Center, Washington, DC, USA.
- Division of Cardiology, MedStar Washington Hospital Center, Washington, DC, USA.
| | - Benjamin B Kenigsberg
- Department of Critical Care, MedStar Washington Hospital Center, Washington, DC, USA
- Division of Cardiology, MedStar Washington Hospital Center, Washington, DC, USA
| | - Daniel R Austin
- Department of Critical Care, MedStar Washington Hospital Center, Washington, DC, USA
- Department of Anesthesiology, MedStar Washington Hospital Center, Washington, DC, USA
| | - Christopher F Barnett
- Division of Cardiology, University of California-San Francisco School of Medicine, San Francisco, CA, USA
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Fang H, Wang J, Shi R, Li Y, Li XM, Gao Y, Shen LT, Qian WL, Jiang L, Yang ZG. Biventricular Dysfunction and Ventricular Interdependence in Patients With Pulmonary Hypertension: A 3.0-T Cardiac MRI Feature Tracking Study. J Magn Reson Imaging 2024; 60:350-362. [PMID: 37864419 DOI: 10.1002/jmri.29044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/20/2023] [Accepted: 09/20/2023] [Indexed: 10/22/2023] Open
Abstract
BACKGROUND Pulmonary hypertension (PH) results in right ventricular (RV) dysfunction, subsequently leading to left ventricular (LV) impairment. The mechanism underlying ventricular interdependence is largely uninvestigated. PURPOSE To explore the biventricular dysfunction and the ventricular interdependence in PH patients. STUDY TYPE Retrospective. POPULATION One hundred and seven PH patients (mean pulmonary artery pressure >20 mmHg) and 72 age- and sex-matched controls with cardiac magnetic resonance imaging (MRI) studies. FIELD STRENGTH/SEQUENCE 3.0 T/balanced steady-state free precession sequence. ASSESSMENT LV and RV ejection fractions (EF) and RV and LV radial, circumferential, and longitudinal strains were assessed using commercial software. Strains were compared between controls, PH patients with preserved RVEF (RVEF ≥40%, N = 48), and PH patients with reduced RVEF (RVEF <40%, N = 59). STATISTICAL TESTS Chi-squared tests or Fisher's exact test, t tests or Mann-Whitney U test, one-way ANOVA with Bonferroni's post hoc correction or Kruskal-Wallis test, Pearson or Spearman correlation, and multivariable linear regression analysis. A two-tailed P < 0.05 was deemed statistically significant. RESULTS RV strain decreased sequentially from controls, through PH with preserved RVEF, to PH with reduced RVEF. PH patients with reduced RVEF had significantly lower LV strain, especially septal strain, and LV peak diastolic strain rate compared with both controls and PH patients with preserved RVEF. Multivariable analyses showed that RVEF was independently correlated with LV strain; furthermore, independent of RVEF, RV strain was significantly correlated with LV strain (LVGRS: β = 0.416; LVGCS: β = -0.371; LVGLS: β = 0.283). DATA CONCLUSION Subclinical impairment of RV function was found in PH with preserved RVEF. LV strain was impaired when RV was dysfunctional, which was associated with worsening RV strain. Therefore, while focusing on improving RV function, LV dysfunction in PH patients should also be monitored and treated early in order to slow the progression of the disease. LEVEL OF EVIDENCE 3 TECHNICAL EFFICACY: Stage 3.
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Affiliation(s)
- Han Fang
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Jin Wang
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Rui Shi
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Yuan Li
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Xue-Ming Li
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Yue Gao
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Li-Ting Shen
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Wen-Lei Qian
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Li Jiang
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
| | - Zhi-Gang Yang
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, China
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Cadour F, Sourdon J, Rapacchi S. Editorial for "Biventricular Dysfunction and Ventricular Interdependence in Patients With Pulmonary Hypertension: A 3.0-T Cardiac MRI Feature Tracking Study". J Magn Reson Imaging 2024; 60:363-364. [PMID: 37905953 DOI: 10.1002/jmri.29092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 11/02/2023] Open
Affiliation(s)
- Farah Cadour
- Department of Medical Imaging, University of Toronto, University Medical Imaging Toronto, Peter Munk Cardiac Centre, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Lekane M, Burnotte P, Gommeren K, Mc Entee K, Merveille AC. Left ventricular eccentricity index to assess precapillary pulmonary hypertension in dogs. J Vet Cardiol 2023; 51:220-231. [PMID: 38246109 DOI: 10.1016/j.jvc.2023.12.003] [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: 04/02/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/23/2024]
Abstract
INTRODUCTION Interventricular septal flattening, frequently present in pulmonary hypertension (PH) can be quantified by the left ventricular eccentricity index (EI) measured at end-diastole (EId), end-systole (EIs) and at maximal septal flattening (EIm). In humans, EI correlates with invasive pulmonary arterial pressure. The aim of this study was to evaluate if EI correlates with parameters of right heart remodeling (RHR) and if EI is a quantitative marker of PH in dogs. MATERIALS AND METHODS Left ventricular eccentricity indices were retrospectively measured in four groups (no, mild, moderate and severe PH) with interpretable tricuspid and/or pulmonary regurgitation. RESULTS Ninety-seven dogs were included, with no (n = 29), mild (n = 13), moderate (n = 25) and severe (n = 30) PH. The intra- and inter-observer variability for EI measurements ranged from 2 % to 11 %. All EI were significantly elevated in severe compared to no, mild and moderate PH (P < 0.0005). In the moderate group, EIs and EIm were higher compared to the no PH group (P < 0.01). Tricuspid and pulmonary regurgitation pressure gradients and RHR parameters correlated with EId, EIs and EIm in all groups. Optimal cut-off values discriminating moderate and severe PH from no and mild PH were 1.24 (Sensitivity (Se) 60 %; Specificity (Sp) 90 %) for EId, 1.34 (Se 67 %; Sp 95 %) for EIs and 1.37 (Se 76 %; Sp 83 %) for EIm. CONCLUSIONS Left ventricular eccentricity indices are reproducible echocardiographic variables increasing with severity of PH. Dogs with moderate and severe PH can be discriminated from dogs with no or mild PH using EIs and EIm.
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Affiliation(s)
- M Lekane
- Department of Small Animal Veterinary Clinical Sciences, University of Liège, Quartier Vallée 2, Avenue de Cureghem 1, 4000 Liège, Belgium.
| | - P Burnotte
- Department of Small Animal Veterinary Clinical Sciences, University of Liège, Quartier Vallée 2, Avenue de Cureghem 1, 4000 Liège, Belgium
| | - K Gommeren
- Department of Small Animal Veterinary Clinical Sciences, University of Liège, Quartier Vallée 2, Avenue de Cureghem 1, 4000 Liège, Belgium
| | - K Mc Entee
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, ULB, Route de Lennik, 808, 1070 Bruxelles, Belgium
| | - A-C Merveille
- Department of Small Animal Veterinary Clinical Sciences, University of Liège, Quartier Vallée 2, Avenue de Cureghem 1, 4000 Liège, Belgium
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Jack T, Carlens J, Diekmann F, Hasan H, Chouvarine P, Schwerk N, Müller C, Wieland I, Tudorache I, Warnecke G, Avsar M, Horke A, Ius F, Bobylev D, Hansmann G. Bilateral lung transplantation for pediatric pulmonary arterial hypertension: perioperative management and one-year follow-up. Front Cardiovasc Med 2023; 10:1193326. [PMID: 37441704 PMCID: PMC10333590 DOI: 10.3389/fcvm.2023.1193326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 06/02/2023] [Indexed: 07/15/2023] Open
Abstract
Background Bilateral lung transplantation (LuTx) remains the only established treatment for children with end-stage pulmonary arterial hypertension (PAH). Although PAH is the second most common indication for LuTx, little is known about optimal perioperative management and midterm clinical outcomes. Methods Prospective observational study on consecutive children with PAH who underwent LuTx with scheduled postoperative VA-ECMO support at Hannover Medical School from December 2013 to June 2020. Results Twelve patients with PAH underwent LuTx (mean age 11.9 years; age range 1.9-17.8). Underlying diagnoses included idiopathic (n = 4) or heritable PAH (n = 4), PAH associated with congenital heart disease (n = 2), pulmonary veno-occlusive disease (n = 1), and pulmonary capillary hemangiomatosis (n = 1). The mean waiting time was 58.5 days (range 1-220d). Three patients were bridged to LuTx on VA-ECMO. Intraoperative VA-ECMO/cardiopulmonary bypass was applied and VA-ECMO was continued postoperatively in all patients (mean ECMO-duration 185 h; range 73-363 h; early extubation). The median postoperative ventilation time was 28 h (range 17-145 h). Echocardiographic conventional and strain analysis showed that 12 months after LuTx, all patients had normal biventricular systolic function. All PAH patients are alive 2 years after LuTx (median follow-up 53 months, range 26-104 months). Conclusion LuTx in children with end-stage PAH resulted in excellent midterm outcomes (100% survival 2 years post-LuTx). Postoperative VA-ECMO facilitates early extubation with rapid gain of allograft function and sustained biventricular reverse-remodeling and systolic function after RV pressure unloading and LV volume loading.
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Affiliation(s)
- Thomas Jack
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Julia Carlens
- Department of Pediatric Pulmonology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany
| | - Franziska Diekmann
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Hosan Hasan
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Philippe Chouvarine
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Nicolaus Schwerk
- Department of Pediatric Pulmonology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany
| | - Carsten Müller
- Department of Pediatric Pulmonology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany
| | - Ivonne Wieland
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - Igor Tudorache
- Department of Cardiac Surgery, University Hospital of Zürich, Zürich, Switzerland
| | - Gregor Warnecke
- Department of Cardiac Surgery, Ruprecht-Karls-University, Heidelberg, Germany
| | - Murat Avsar
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Alexander Horke
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Fabio Ius
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Dmitry Bobylev
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Georg Hansmann
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
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Haarman MG, Coenraad I, Hagdorn QAJ, Hillege HL, Willems TP, Berger RMF, Douwes JM. Cardiac Magnetic Resonance Derived Left Ventricular Eccentricity Index and Right Ventricular Mass Measurements Predict Outcome in Children with Pulmonary Arterial Hypertension. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10040756. [PMID: 37190005 DOI: 10.3390/children10040756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/24/2023] [Accepted: 04/13/2023] [Indexed: 05/17/2023]
Abstract
Pulmonary arterial hypertension (PAH) is associated with increased right ventricular (RV) afterload, affecting RV remodeling and RV performance, a major determinant of outcome in PAH-patients. In children with PAH, treatment strategy is guided by risk stratification where noninvasive prognosticators are highly needed. The prognostic value of RV characteristics derived by cardiac magnetic resonance (CMR) has been scarcely studied in pediatric PAH. We aimed to identify CMR-derived morphometric and functional RV characteristics prognostic for outcome in children with PAH. From the Dutch National cohort, thirty-eight children with either idiopathic/heritable PAH (IPAH/HPAH) or PAH associated with congenital heart disease (PAH-CHD), who underwent CMR, were included (median (interquartile range) [IQR] age 13.0 years (10.8-15.0), 66% females). Patients had severe PAH, characterized by their World Health Organization Functional Class, increased N-terminal pro-B-type natriuretic peptide and high pulmonary arterial pressure and pulmonary vascular resistance index at time of CMR. RV-ejection fraction (RVEF), indexed RV-mass (RVMi), the ratio between RV and LV mass (RVM/LVM-ratio) and left ventricular eccentricity index (LVEI) all correlated with transplant-free survival from time of CMR. These correlations could not be confirmed in the PAH-CHD group. This study shows that CMR-derived measures reflecting RV function and remodeling (LVEI, RVMi, RVM/LVM-ratio, RVEF) predict transplant-free survival in children with IPAH/HPAH and may be included in risk stratification scores in pediatric PAH.
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Affiliation(s)
- Meindina G Haarman
- Center for Congenital Heart Diseases, Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
| | - Iris Coenraad
- Center for Congenital Heart Diseases, Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
| | - Quint A J Hagdorn
- Center for Congenital Heart Diseases, Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
| | - Hans L Hillege
- Department of Epidemiology, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
- Department of Cardiology, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
| | - Tineke P Willems
- Department of Radiology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
| | - Rolf M F Berger
- Center for Congenital Heart Diseases, Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
| | - Johannes M Douwes
- Center for Congenital Heart Diseases, Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
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Vortex Formation Time is a Novel Measure for Early Detection of Diastolic Abnormalities in Adolescents with Hypertension. Pediatr Cardiol 2023; 44:1135-1142. [PMID: 36781465 DOI: 10.1007/s00246-023-03116-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/27/2023] [Indexed: 02/15/2023]
Abstract
Pediatric hypertension (HTN) has demonstrated an upward trend in recent years. Adolescent HTN has been linked to adult HTN, cardiovascular disease, and other health conditions. Thus, it is essential that HTN and its associated cardiac abnormalities be diagnosed and treated early to minimize lifelong adverse effects. In this study, we evaluated whether vortex formation time (VFT), a validated echocardiogram measure of left ventricular diastolic dysfunction, correlated with ambulatory blood pressure monitoring (ABPM) and HTN in adolescents. Echocardiogram data including systolic and diastolic function indices and ABPM data from 2015 to 2022 in adolescents age 13-21 years were analyzed retrospectively. We found that VFT was significantly lower in adolescents with HTN compared to those without HTN (3.69 ± 1.39 vs. 4.50 ± 1.73, p = 0.02). Standard echocardiographic indices of systolic and diastolic function were similar between the two groups, except indexed left atrial volume. Higher overall systolic blood pressure (SBP) (β = - 0.01, CI - 0.02, - 2.2 × 10-3, p = 0.02), mean wake SBP (β = - 0.01, CI - 0.02, - 9.4 × 10-4, p = 0.03), and mean sleep SBP (β = - 0.01, CI - 0.02, - 1.2 × 10-3, p = 0.03) were significantly associated with lower VFT. This study demonstrates that VFT correlates to ABPM data and can be used a novel diagnostic measure in adolescents with HTN.
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Toyoshima K, Saito T, Shimokaze T, Katsumata K, Ohmura J, Kimura S, Aoki H, Takahashi M, Shibasaki J, Kawataki M, Kim KS, Shinkai M, Ishikawa H, Saito N, Masutani S. Right to left ventricular volume ratio is associated with mortality in congenital diaphragmatic hernia. Pediatr Res 2023:10.1038/s41390-022-02430-z. [PMID: 36624284 DOI: 10.1038/s41390-022-02430-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Congenital diaphragmatic hernia (CDH) is associated with high neonatal mortality. We performed this study to test the hypothesis that left ventricular (LV) and right ventricular (RV) volumes assessed by three-dimensional echocardiography may be associated with mortality in CDH. METHODS This study was a single-center retrospective cohort study involving 35 infants with CDH. RV and LV end-diastolic volume (RVEDV and LVEDV, respectively) were measured by three-dimensional echocardiography and were corrected by birth body weight (BBW) on day 1. RVEDV/BBW, LVEDV/BBW, and LVEDV/RVEDV were compared between CDH survivors and non-survivors. Receiver-operating characteristic curve analysis was performed to assess the predictive ability for mortality of the echocardiographic parameters. RESULTS Comparing CDH non-survivors (n = 6) with survivors (n = 29), respectively, RVEDV/BBW was significantly larger (2.54 ± 0.33 vs 1.86 ± 0.35 ml/kg; P < 0.01), LVEDV/BBW was significantly smaller (0.86 ± 0.21 vs 1.22 ± 0.33 ml/kg; P < 0.001), and LVEDV/RVEDV was significantly lower (0.34 ± 0.06 vs 0.66 ± 0.18; P < 0.001). The area under the curve for LVEDV/RVEDV was the largest (0.98). CONCLUSIONS Three-dimensional echocardiographic volume imbalance between the RV and LV was remarkable in CDH non-survivors. The LVEDV/RVEDV ratio may be associated with mortality in CDH. IMPACT Mortality with congenital diaphragmatic hernia (CDH) is high, and evaluating left and right ventricular structures and functions may be helpful in assessing the prognosis. Three-dimensional (3D) echocardiography indicated that the left ventricular end-diastolic volume/right ventricular end-diastolic volume ratio within 24 h after birth was associated with mortality in CDH infants. The usefulness of this ratio should be validated in prospective multicenter studies involving larger numbers of patients.
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Affiliation(s)
- Katsuaki Toyoshima
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan.
| | - Tomoko Saito
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tomoyuki Shimokaze
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Kaoru Katsumata
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Junya Ohmura
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Sasagu Kimura
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Hirosato Aoki
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Megumi Takahashi
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Jun Shibasaki
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Motoyoshi Kawataki
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Ki-Sung Kim
- Department of Cardiology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Masato Shinkai
- Department of Surgery, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Hiroshi Ishikawa
- Department of Obstetrics, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Naka Saito
- Department of Clinical Laboratory, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical University, Kawagoe, Japan
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Vedrenne-Cloquet M, Khirani S, Khemani R, Lesage F, Oualha M, Renolleau S, Chiumello D, Demoule A, Fauroux B. Pleural and transpulmonary pressures to tailor protective ventilation in children. Thorax 2023; 78:97-105. [PMID: 35803726 DOI: 10.1136/thorax-2021-218538] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 06/12/2022] [Indexed: 02/07/2023]
Abstract
This review aims to: (1) describe the rationale of pleural (PPL) and transpulmonary (PL) pressure measurements in children during mechanical ventilation (MV); (2) discuss its usefulness and limitations as a guide for protective MV; (3) propose future directions for paediatric research. We conducted a scoping review on PL in critically ill children using PubMed and Embase search engines. We included peer-reviewed studies using oesophageal (PES) and PL measurements in the paediatric intensive care unit (PICU) published until September 2021, and excluded studies in neonates and patients treated with non-invasive ventilation. PL corresponds to the difference between airway pressure and PPL Oesophageal manometry allows measurement of PES, a good surrogate of PPL, to estimate PL directly at the bedside. Lung stress is the PL, while strain corresponds to the lung deformation induced by the changing volume during insufflation. Lung stress and strain are the main determinants of MV-related injuries with PL and PPL being key components. PL-targeted therapies allow tailoring of MV: (1) Positive end-expiratory pressure (PEEP) titration based on end-expiratory PL (direct measurement) may be used to avoid lung collapse in the lung surrounding the oesophagus. The clinical benefit of such strategy has not been demonstrated yet. This approach should consider the degree of recruitable lung, and may be limited to patients in which PEEP is set to achieve an end-expiratory PL value close to zero; (2) Protective ventilation based on end-inspiratory PL (derived from the ratio of lung and respiratory system elastances), might be used to limit overdistention and volutrauma by targeting lung stress values < 20-25 cmH2O; (3) PPL may be set to target a physiological respiratory effort in order to avoid both self-induced lung injury and ventilator-induced diaphragm dysfunction; (4) PPL or PL measurements may contribute to a better understanding of cardiopulmonary interactions. The growing cardiorespiratory system makes children theoretically more susceptible to atelectrauma, myotrauma and right ventricle failure. In children with acute respiratory distress, PPL and PL measurements may help to characterise how changes in PEEP affect PPL and potentially haemodynamics. In the PICU, PPL measurement to estimate respiratory effort is useful during weaning and ventilator liberation. Finally, the use of PPL tracings may improve the detection of patient ventilator asynchronies, which are frequent in children. Despite these numerous theoritcal benefits in children, PES measurement is rarely performed in routine paediatric practice. While the lack of robust clincal data partially explains this observation, important limitations of the existing methods to estimate PPL in children, such as their invasiveness and technical limitations, associated with the lack of reference values for lung and chest wall elastances may also play a role. PPL and PL monitoring have numerous potential clinical applications in the PICU to tailor protective MV, but its usefulness is counterbalanced by technical limitations. Paediatric evidence seems currently too weak to consider oesophageal manometry as a routine respiratory monitoring. The development and validation of a noninvasive estimation of PL and multimodal respiratory monitoring may be worth to be evaluated in the future.
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Affiliation(s)
- Meryl Vedrenne-Cloquet
- Pediatric intensive care unit, Necker-Enfants Malades Hospitals, Paris, France .,Université de Paris Cité, VIFASOM, Paris, France.,Pediatric Non Invasive Ventilation Unit, Necker-Enfants Malades Hospitals, Paris, France
| | - Sonia Khirani
- Pediatric Non Invasive Ventilation Unit, Necker-Enfants Malades Hospitals, Paris, France.,ASV Santé, Genevilliers, France
| | - Robinder Khemani
- Children's Hospital Los Angeles, University of Southern California, Los Angeles, California, USA
| | - Fabrice Lesage
- Pediatric intensive care unit, Necker-Enfants Malades Hospitals, Paris, France
| | - Mehdi Oualha
- Pediatric intensive care unit, Necker-Enfants Malades Hospitals, Paris, France
| | - Sylvain Renolleau
- Pediatric intensive care unit, Necker-Enfants Malades Hospitals, Paris, France
| | - Davide Chiumello
- Dipartimento di Anestesia, Rianimazione e Terapia del Dolore, Fondazione, IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Alexandre Demoule
- Service de Médecine Intensive et Réanimation (Département R3S), AP-HP, Groupe Hospitalier Universitaire APHP-Sorbonne Université, site Pitié-Salpêtrière, Paris, France.,UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, F-75005 Paris, Sorbonne Université, INSERM, Paris, France
| | - Brigitte Fauroux
- Université de Paris Cité, VIFASOM, Paris, France.,Pediatric Non Invasive Ventilation Unit, Necker-Enfants Malades Hospitals, Paris, France
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Maia PD, Gien J, Kinsella JP, Zablah J, Morgan G, Ivy DD, Abman SH, Frank BS. Hemodynamic Characterization of Neonates With Congenital Diaphragmatic Hernia-Associated Pulmonary Hypertension by Cardiac Catheterization. J Pediatr 2022; 255:230-235.e2. [PMID: 36463937 DOI: 10.1016/j.jpeds.2022.11.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 12/04/2022]
Abstract
We examined the results of cardiac catheterization in infants with congenital diaphragmatic hernia (CDH) from 2009 to 2020. Catheterization confirmed pulmonary arterial hypertension in all cases (n = 17) and identified left ventricular (LV) diastolic dysfunction (LVDD) in 53%. LVDD was associated with greater respiratory morbidity. Preprocedural noninvasive assessment showed inconsistent agreement with catheterization results.
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Affiliation(s)
- Paula Dias Maia
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO.
| | - Jason Gien
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
| | - John P Kinsella
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
| | - Jenny Zablah
- Section of Cardiology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
| | - Gareth Morgan
- Section of Cardiology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
| | - D Dunbar Ivy
- Section of Cardiology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
| | - Steven H Abman
- Pediatric Heart Lung Center, Section of Pediatric Pulmonary Medicine, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
| | - Benjamin S Frank
- Section of Cardiology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO
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11
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Reiter G, Kovacs G, Reiter C, Schmidt A, Fuchsjäger M, Olschewski H, Reiter U. Left atrial acceleration factor as a magnetic resonance 4D flow measure of mean pulmonary artery wedge pressure in pulmonary hypertension. Front Cardiovasc Med 2022; 9:972142. [PMID: 35990987 PMCID: PMC9381926 DOI: 10.3389/fcvm.2022.972142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 07/11/2022] [Indexed: 12/04/2022] Open
Abstract
Background Mean pulmonary artery wedge pressure (PAWP) represents a right heart catheter (RHC) surrogate measure for mean left atrial (LA) pressure and is crucial for the clinical classification of pulmonary hypertension (PH). Hypothesizing that PAWP is related to acceleration of blood throughout the LA, we investigated whether an adequately introduced LA acceleration factor derived from magnetic resonance (MR) four-dimensional (4D) flow imaging could provide an estimate of PAWP in patients with known or suspected PH. Methods LA 4D flow data of 62 patients with known or suspected PH who underwent RHC and near-term 1.5 T cardiac MR (ClinicalTrials.gov identifier: NCT00575692) were retrospectively analyzed. Early diastolic LA peak outflow velocity (vE) as well as systolic (vS) and early diastolic (vD) LA peak inflow velocities were determined with prototype software to calculate the LA acceleration factor (α) defined as α = vE/[(vS + vD)/2]. Correlation, regression and Bland-Altman analysis were employed to investigate the relationship between α and PAWP, α-based diagnosis of elevated PAWP (>15 mmHg) was analyzed by receiver operating characteristic curve analysis. Results α correlated very strongly with PAWP (r = 0.94). Standard deviation of differences between RHC-derived PAWP and PAWP estimated from linear regression model (α = 0.61 + 0.10·PAWP) was 2.0 mmHg. Employing the linear-regression-derived cut-off α = 2.10, the α-based diagnosis of elevated PAWP revealed the area under the curve 0.97 with sensitivity/specificity 93%/92%. Conclusions The very close relationship between the LA acceleration factor α and RHC-derived PAWP suggests α as potential non-invasive parameter for the estimation of PAWP and the distinction between pre- and post-capillary PH.
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Affiliation(s)
- Gert Reiter
- Research & Development, Siemens Healthcare Diagnostics GmbH, Graz, Austria
- Division of General Radiology, Department of Radiology, Medical University of Graz, Austria
| | - Gabor Kovacs
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Austria
- Ludwig Boltzmann Institute for Lung Vascular Research Graz, Austria
| | - Clemens Reiter
- Division of General Radiology, Department of Radiology, Medical University of Graz, Austria
| | - Albrecht Schmidt
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Austria
| | - Michael Fuchsjäger
- Division of General Radiology, Department of Radiology, Medical University of Graz, Austria
| | - Horst Olschewski
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Austria
- Ludwig Boltzmann Institute for Lung Vascular Research Graz, Austria
| | - Ursula Reiter
- Division of General Radiology, Department of Radiology, Medical University of Graz, Austria
- *Correspondence: Ursula Reiter
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12
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Murphy G, Jayasekera G, Mullin J, Gallagher L, Welsh DJ. Exploring the failing right ventricle in pulmonary hypertension by CMR: An
in vivo
study utilising Macitentan. Pulm Circ 2022; 12:e12124. [PMID: 36092794 PMCID: PMC9438403 DOI: 10.1002/pul2.12124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/12/2022] [Accepted: 07/30/2022] [Indexed: 11/24/2022] Open
Abstract
Cardiac magnetic resonance (CMR) imaging is used to assess the right ventricle (RV) of pulmonary hypertensive (PH) patients and more recently to track changes in response to therapy. We wished to investigate if repeat CMRs could be used to assess ventricular changes in the Sugen 5416 hypoxic (Su/Hx) rat model of PH treated with the dual endothelin receptor antagonist Macitentan. Male Sprague Dawley Su/Hx rats were dosed for 3 weeks with either vehicle or Macitentan (30 mg/kg) daily, control rats received only vehicle. All rats underwent three CMR scans; before treatment, 2 weeks into treatment, and end of the study. A separate group of Su/Hx and control rats, treated as above, underwent terminal hemodynamic measurements. Using terminal and CMR measurements, Macitentan was found to lower RV systolic pressure pulmonary artery remodeling and increase RV ejection fraction but not change RV hypertrophy (RVH). Repeat CMRs determined that Su/Hx rats treated with Macitentan had significantly reversed RVH via reducing RV mass as well as reducing elevated left ventricular eccentricity index; reductions in RV mass were also observed in Su/Hx vehicle rats exposed to normoxic conditions. We have demonstrated that repeat CMRs can be used to assess the volume and structural changes in the ventricles of the Su/Hx rat model. Using repeat CMRs has allowed us to build a more complete picture of the response of the RV and the left ventricle to treatment. It is unknown if these effects are a consequence of direct action on the RV or secondary to improvements in the lung vasculature.
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Affiliation(s)
- Gerard Murphy
- Scottish Pulmonary Vascular Unit Glasgow Caledonian University Glasgow G4 0BA U.K
| | - Geeshath Jayasekera
- Scottish Pulmonary Vascular Unit Glasgow Caledonian University Glasgow G4 0BA U.K
| | - James Mullin
- Institute of Neuroscience & Psychology University of Glasgow Glasgow G12 8QQ U.K
| | - Lindsay Gallagher
- Institute of Neuroscience & Psychology University of Glasgow Glasgow G12 8QQ U.K
| | - David J Welsh
- Scottish Pulmonary Vascular Unit Glasgow Caledonian University Glasgow G4 0BA U.K
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13
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Schweintzger S, Kurath-Koller S, Burmas A, Grangl G, Fandl A, Noessler N, Avian A, Gamillscheg A, Chouvarine P, Hansmann G, Koestenberger M. Normal Echocardiographic Reference Values of the Right Ventricular to Left Ventricular Endsystolic Diameter Ratio and the Left Ventricular Endsystolic Eccentricity Index in Healthy Children and in Children With Pulmonary Hypertension. Front Cardiovasc Med 2022; 9:950765. [PMID: 35911557 PMCID: PMC9332913 DOI: 10.3389/fcvm.2022.950765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundAn accurate assessment of the right and left ventricle and their interaction is important in pediatric pulmonary hypertension (PH). Our objective was to provide normal reference values for the right ventricular to left ventricular endsystolic (RV/LVes) ratio and the LV endsystolic eccentricity index (LVes EI) in healthy children and in children with PH.MethodsWe conducted an echocardiographic study in 769 healthy children (median age: 3.36 years; range: 1 day—18 years) and validated abnormal values in 44 children with PH (median age: 2.1 years; range: 0.1 months—17.7 years). We determined the effects of gender, age, body length, body weight, and body surface area (BSA) on RV/LVes ratio and LVes EI values. The RV/LVes ratio and LVes EI were measured from the parasternal short axis view between papillary muscle from the endocardial to endocardial surfaces.ResultsBoth, the RV/LVes ratio and the LVes EI were highly age-dependent: (i) neonates RV/LVes ratio [median 0.83 (range 0.53–1.37)], LVes EI [1.21 (0.92–1.45)]; (ii) 12–24 months old: RV/LVes ratio: [0.55 (0.35–0.80)], LVes EI: [1.0 (0.88–1.13)]; iii) 18th year of life RV/LVes ratio: [0.53 (0.32–0.74)], LVes EI: [1.0 (0.97–1.07)]. Healthy neonates had high LVes EI and RV/LVes ratios, both gradually decreased within the first year of life and until BSA values of about 0.5 m2, body weight to about 15 kg and body length to about 75 cm, but were almost constant thereafter. Children (>1 year) and adolescents with PH had significantly higher RV/LVes ratio (no PH: median 0.55, IQR 0.49–0.60; PH: 1.02, 0.87–1.26; p < 0.001) and higher LVes EI values (no PH: 1.00, 0.98–1.00; PH: 1.53, 1.26–1.71; p < 0.001) compared to those without PH. To predict the presence of PH in children > 1 year, we found the following best cutoff values: RV/LVes ratio ≥ 0.67 (sensitivity: 1.00, specificity: 0.95) and LVes EI ≥ 1.06 (sensitivity: 1.00, specificity: 0.97).ConclusionWe provide normal echocardiographic reference values of the RV/LVes ratio and LVes EI in healthy children, as well as statistically determined cutoffs for the increased values in children with PH.
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Affiliation(s)
- Sabrina Schweintzger
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
- *Correspondence: Sabrina Schweintzger,
| | - Stefan Kurath-Koller
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
| | - Ante Burmas
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
| | - Gernot Grangl
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
| | - Andrea Fandl
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
| | - Nathalie Noessler
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
| | - Alexander Avian
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
| | - Andreas Gamillscheg
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
| | - Philippe Chouvarine
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hanover, Germany
| | - Georg Hansmann
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hanover, Germany
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Martin Koestenberger
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Graz, Austria
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
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14
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Morita T, Nakamura K, Osuga T, Kawamoto S, Miki S, Takiguchi M. Evaluation of Right Ventricular Function and Dyssynchrony in a Dog Model of Acute Pulmonary Embolism: Diagnostic Utility and Reversibility. Front Vet Sci 2022; 9:861064. [PMID: 35795787 PMCID: PMC9251490 DOI: 10.3389/fvets.2022.861064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 05/27/2022] [Indexed: 11/18/2022] Open
Abstract
Background The diagnosis of acute pulmonary thromboembolism is challenging in dogs. Little has been reported on changes in echocardiographic indices in dogs with acute pulmonary thromboembolism. The objective of this study was to validate the relationship between echocardiographic indices and right heart catheterization variables in dogs with acute pulmonary embolism and to identify a useful echocardiographic index for diagnosing acute pulmonary embolism. Materials and Methods Six healthy laboratory beagles were included in the study. Echocardiography and right heart catheterization were performed in a dog model of acute pulmonary embolism produced by microsphere injection. Echocardiographic indices, including the right ventricular (RV) Tei index, RV longitudinal strain, and the dyssynchrony index using speckle tracking echocardiography, transmitral flow, and eccentricity index, were measured. Results The mean pulmonary arterial pressure increased (22.2 ± 1.2 mmHg) and the blood pressure decreased after microsphere injection. Although the mean pulmonary arterial pressure remained elevated, the blood pressure recovered 2 days after the microsphere injection. Most echocardiographic indices of RV function were significantly impaired following microsphere injection and recovered after 2 days. In contrast, the RV Tei index was significantly impaired after microsphere injection and the impairment persisted after 2 days. Multivariable analysis revealed that the RV Tei index was an independent echocardiographic predictor of pulmonary vascular resistance (β = 0.88, P < 0.001), and transmitral early diastolic wave was an independent predictor of the cardiac index (β = −0.86, P = 0.001). Conclusions The RV Tei index is a useful echocardiographic index for diagnosing acute pulmonary embolism. Ventricular interdependence may be an important factor causing low cardiac output in dogs with acute pulmonary embolism.
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Affiliation(s)
- Tomoya Morita
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Kensuke Nakamura
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
- *Correspondence: Kensuke Nakamura
| | - Tatsuyuki Osuga
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Sei Kawamoto
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Shingo Miki
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Mitsuyoshi Takiguchi
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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15
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The Effect of Renal Denervation on Cardiac Diastolic Function in Patients with Hypertension and Paroxysmal Atrial Fibrillation. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:2268591. [PMID: 35668773 PMCID: PMC9167068 DOI: 10.1155/2022/2268591] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/01/2022] [Accepted: 05/05/2022] [Indexed: 12/05/2022]
Abstract
Objective Renal artery denervation (RDN) can treat hypertension and paroxysmal atrial fibrillation (PAF). Hypertension and PAF can affect cardiac diastolic function. The study aimed to evaluate the effect of RDN on cardiac diastolic function in patients with refractory hypertension and PAF. Methods 190 consecutive patients with hypertension and PAF were recruited. The levels of NT-proBNP and metrics of echocardiography were measured before and after RDN in patients with refractory hypertension and PAF. The 190 patients were divided into the decreasing HR and nondecreasing HR group, the decreasing MAP and nondecreasing MAP group, the HFPEF group, and the normal diastolic function group, respectively. Results Before RDN, the indices about cardiac diastolic function were out of the normal range. After RDN, the diastolic function improved in the indices of NT-proBNP, E/e′, e′. The diastolic function about the indices of NT-proBNP, E/e′, e′ was improved in the decreasing HR group, the decreasing mean arterial pressure (MAP) group, and the HFPEF group, correspondingly compared to the nondecreasing HR group, the non-decreasing MAP group, and the preoperative normal diastolic function group. In the multivariate analysis, the MAP and HR were the only two indicators significantly associated with the improvement of diastolic function. Conclusion RDN could improve the diastolic function in patients with refractory hypertension and PAF. Patients with HFPEF could receive benefits through RDN. It was speculated that RDN improved the diastolic function mainly through decreasing HR and MAP.
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16
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Schäfer M, Frank BS, Ivy DD, Mitchell MB, Collins KK, Jone PN, von Alvensleben JC. Repolarization Dispersion Is Associated With Diastolic Electromechanical Discoordination in Children With Pulmonary Arterial Hypertension. J Am Heart Assoc 2022; 11:e024787. [PMID: 35229614 PMCID: PMC9075289 DOI: 10.1161/jaha.121.024787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Electromechanical dyssynchrony is a well described comorbidity in pulmonary arterial hypertension (PAH). ECG‐derived measurements reflective of diastolic dysfunction and electromechanical imaging markers are yet to be investigated. In this study we investigated the ECG‐ derived marker of repolarization dispersion, interval between the peak and end of T wave (TpTe), in pediatric patients with PAH and left ventricular (LV) diastolic dysfunction. Methods and Results We measured TpTe from a standard 12‐lead ECG and in 30 children with PAH and matched control subjects. All participants underwent same‐day echocardiography and myocardial strain analysis to calculate the diastolic electromechanical discoordination marker diastolic relaxation fraction. When compared with control subjects, patients with PAH had increased TpTe (93±15 versus 81±12 ms, P=0.001) and elevated diastolic relaxation fraction (0.33±0.10 versus 0.27±0.03, P=0.001). Patients with PAH with LV diastolic dysfunction had significantly increased TpTe when compared with patients with PAH without diastolic dysfunction (P=0.012) and when compared with control group (P<0.001). Similarly, patients with PAH with LV diastolic dysfunction had increased diastolic relaxation fraction when compared with PAH patients without diastolic dysfunction (P=0.007) and when compared with control group (P<0.001). A 10‐ms increase in TpTe was significantly associated with 0.023 increase in diastolic relaxation fraction (P=0.008) adjusting for body surface area, heart rate, right ventricular volumes, and function. Conclusions Prolonged myocardial repolarization and abnormal LV diastolic electromechanical discoordination exist in parallel in children with PAH and are associated with worse LV diastolic function and functional class.
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Affiliation(s)
- Michal Schäfer
- Division of Cardiology Heart InstituteChildren's Hospital ColoradoUniversity of Colorado Denver Denver CO
| | - Benjamin S Frank
- Division of Cardiology Heart InstituteChildren's Hospital ColoradoUniversity of Colorado Denver Denver CO
| | - D Dunbar Ivy
- Division of Cardiology Heart InstituteChildren's Hospital ColoradoUniversity of Colorado Denver Denver CO
| | - Max B Mitchell
- Section of Congenital Heart Surgery Heart InstituteChildren's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO
| | - Kathryn K Collins
- Division of Cardiology Heart InstituteChildren's Hospital ColoradoUniversity of Colorado Denver Denver CO
| | - Pei-Ni Jone
- Division of Cardiology Heart InstituteChildren's Hospital ColoradoUniversity of Colorado Denver Denver CO
| | - Johannes C von Alvensleben
- Division of Cardiology Heart InstituteChildren's Hospital ColoradoUniversity of Colorado Denver Denver CO
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17
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Rodriguez-Gonzalez M, Rodriguez-Campoy P, Estalella-Mendoza A, Castellano-Martinez A, Flores-Gonzalez JC. Characterization of Cardiopulmonary Interactions and Exploring Their Prognostic Value in Acute Bronchiolitis: A Prospective Cardiopulmonary Ultrasound Study. Tomography 2022; 8:142-157. [PMID: 35076624 PMCID: PMC8788562 DOI: 10.3390/tomography8010012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/26/2021] [Accepted: 12/31/2021] [Indexed: 12/14/2022] Open
Abstract
We aimed to delineate cardiopulmonary interactions in acute bronchiolitis and to evaluate the capacity of a combined cardiopulmonary ultrasonography to predict the need for respiratory support. This was a prospective observational single-center study that includes infants <12 month of age admitted to a hospital due to acute bronchiolitis. All the included patients underwent clinical, laboratory and cardiopulmonary ultrasonographic evaluation at the same time point within 24 h of hospital admission. The existence of significant correlation between cardiac and respiratory parameters was the primary outcome. The association of different cardiopulmonary variables with the need of respiratory support higher than O2, the length of stay hospitalization, the PICU stay and the duration of respiratory support were a secondary outcome. We enrolled 112 infants (median age 1 (0.5–3) months; 62% males) hospitalized with acute bronchiolitis. Increased values of the pulmonary variables (BROSJOD score, pCO2 and LUS) showed moderate correlations with NT-proBNP and all echocardiographic parameters indicative of pulmonary hypertension and myocardial dysfunction (Tei index). Up to 36 (32%) infants required respiratory support during the hospitalization. This group presented with higher lung ultrasound score (p < 0.001) and increased values of NT-proBNP (p < 0.001), the Tei index (p < 0.001) and pulmonary artery pressures (p < 0.001). All the analyzed respiratory and cardiac variables showed moderate-to-strong correlations with the LOS of hospitalization and the time of respiratory support. Lung ultrasound and echocardiography showed a moderate-to-strong predictive accuracy for the need of respiratory support in the ROC analysis, with the AUC varying from 0.74 to 0.87. Those cases of bronchiolitis with a worse pulmonary status presented with a more impaired cardiac status. Cardiopulmonary ultrasonography could be a useful tool to easily identify high-risk populations for complicated acute bronchiolitis hospitalization.
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Affiliation(s)
| | - Patricia Rodriguez-Campoy
- Pediatric Intensive Care Unit, Puerta del Mar University Hospital, 11010 Cadiz, Spain; (P.R.-C.); (A.E.-M.); (J.C.F.-G.)
| | - Ana Estalella-Mendoza
- Pediatric Intensive Care Unit, Puerta del Mar University Hospital, 11010 Cadiz, Spain; (P.R.-C.); (A.E.-M.); (J.C.F.-G.)
| | - Ana Castellano-Martinez
- Pediatric Nephrology Division, Puerta del Mar University Hospital, 11010 Cadiz, Spain
- Correspondence:
| | - Jose Carlos Flores-Gonzalez
- Pediatric Intensive Care Unit, Puerta del Mar University Hospital, 11010 Cadiz, Spain; (P.R.-C.); (A.E.-M.); (J.C.F.-G.)
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18
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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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19
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Latus H, Meierhofer C. Role of cardiovascular magnetic resonance in pediatric pulmonary hypertension-novel concepts and imaging biomarkers. Cardiovasc Diagn Ther 2021; 11:1057-1069. [PMID: 34527532 DOI: 10.21037/cdt-20-270] [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: 02/29/2020] [Accepted: 04/15/2020] [Indexed: 11/06/2022]
Abstract
Pulmonary hypertension (PH) in children is a heterogenous disease of the small pulmonary arteries characterized by a progressive increase in pulmonary vascular resistance. Despite adequate medical therapy, long-term pressure overload is frequently associated with a progressive course leading to right ventricular failure and ultimately death. Invasive hemodynamic assessment by cardiac catheterization is crucial for initial diagnosis, risk stratification and therapeutic strategy. Although echocardiography remains the most important imaging modality for the assessment of right ventricular function and pulmonary hemodynamics, cardiovascular magnetic resonance (CMR) has emerged as a valuable non-invasive imaging technique that enables comprehensive evaluation of biventricular performance, blood flow, morphology and the myocardial tissue. In this review, we summarize the principles and applications of CMR in the evaluation of pediatric PH patients and present an update about novel CMR based concepts and imaging biomarkers that may provide further diagnostic, therapeutic and prognostic information.
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Affiliation(s)
- Heiner Latus
- Clinic for Congenital Heart Disease and Pediatric Cardiology, German Heart Center Munich, Munich, Germany
| | - Christian Meierhofer
- Clinic for Congenital Heart Disease and Pediatric Cardiology, German Heart Center Munich, Munich, Germany
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20
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Hansmann G, Christou H, Koestenberger M, Sallmon H. Off-label use of PAH-targeted medications approved for adults and their financial coverage by health insurances are vital for children with pulmonary hypertension. Eur J Clin Invest 2021; 51:e13571. [PMID: 33834481 DOI: 10.1111/eci.13571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Georg Hansmann
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany.,The European Pediatric Pulmonary Vascular Disease Network (EPPVDN), Berlin, Germany
| | - Helen Christou
- Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - Martin Koestenberger
- The European Pediatric Pulmonary Vascular Disease Network (EPPVDN), Berlin, Germany.,Division of Pediatric Cardiology, Medical University Graz, Graz, Austria
| | - Hannes Sallmon
- The European Pediatric Pulmonary Vascular Disease Network (EPPVDN), Berlin, Germany.,Department of Pediatric Cardiology, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany.,Department of Congenital Heart Disease/Pediatric Cardiology, Deutsches Herzzentrum Berlin (DHZB), Berlin, Germany
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21
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Mukherjee D, Konduri GG. Pediatric Pulmonary Hypertension: Definitions, Mechanisms, Diagnosis, and Treatment. Compr Physiol 2021; 11:2135-2190. [PMID: 34190343 DOI: 10.1002/cphy.c200023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pediatric pulmonary hypertension (PPH) is a multifactorial disease with diverse etiologies and presenting features. Pulmonary hypertension (PH), defined as elevated pulmonary artery pressure, is the presenting feature for several pulmonary vascular diseases. It is often a hidden component of other lung diseases, such as cystic fibrosis and bronchopulmonary dysplasia. Alterations in lung development and genetic conditions are an important contributor to pediatric pulmonary hypertensive disease, which is a distinct entity from adult PH. Many of the causes of pediatric PH have prenatal onset with altered lung development due to maternal and fetal conditions. Since lung growth is altered in several conditions that lead to PPH, therapy for PPH includes both pulmonary vasodilators and strategies to restore lung growth. These strategies include optimal alveolar recruitment, maintaining physiologic blood gas tension, nutritional support, and addressing contributing factors, such as airway disease and gastroesophageal reflux. The outcome for infants and children with PH is highly variable and largely dependent on the underlying cause. The best outcomes are for neonates with persistent pulmonary hypertension (PPHN) and reversible lung diseases, while some genetic conditions such as alveolar capillary dysplasia are lethal. © 2021 American Physiological Society. Compr Physiol 11:2135-2190, 2021.
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Affiliation(s)
- Devashis Mukherjee
- Division of Neonatology, Department of Pediatrics, Medical College of Wisconsin, Children's Research Institute, Children's Wisconsin, Milwaukee, Wisconsin, 53226, USA
| | - Girija G Konduri
- Division of Neonatology, Department of Pediatrics, Medical College of Wisconsin, Children's Research Institute, Children's Wisconsin, Milwaukee, Wisconsin, 53226, USA
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22
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Left Ventricle Phenotyping Utilizing Tissue Doppler Imaging in Premature Infants with Varying Severity of Bronchopulmonary Dysplasia. J Clin Med 2021; 10:jcm10102211. [PMID: 34065264 PMCID: PMC8160781 DOI: 10.3390/jcm10102211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 12/16/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is characterized by alveolar-capillary simplification and is associated with pulmonary hypertension (PH) in preterm infants. The contribution of left ventricle (LV) disease towards this severe BPD-PH phenotype is not well established. We aimed to describe the longitudinal trajectory of the LV function as measured by tissue Doppler imaging (TDI) and its association with BPD-PH. We retrospectively assessed prospectively acquired clinical and echocardiographic data from 77 preterm infants born between 2011 and 2013. We characterized the LV function by measuring systolic and diastolic myocardial velocities (s’, e’, a’), isovolumetric relaxation time (IVRT), and myocardial performance index with TDI at three time periods from 32 and 36 weeks, postmenstrual age through one year of age. We also measured post systolic motion (PSM), a marker of myocardial dysfunction that results from asynchronous movement of the ventricular walls, and not previously described in preterm infants. Patients were stratified into groups according to BPD severity and the presence of PH and compared over time. Conventional TDI measures of the LV function were similar between groups, but the septal PSM was significantly prolonged over the first year of age in patients with BPD-PH. PSM provides a novel objective way to assess the hemodynamic impact of lung and pulmonary vascular disease severity on LV function in preterm infants with BPD and PH.
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23
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Schäfer M, Frank BS, Ivy DD, Abman SH, Stenmark KR, Mitchell MB, Browne LP, Barker AJ, Hunter KS, Kheyfets V, Miller-Reed K, Ing R, Morgan GJ, Truong U. Short-Term Effects of Inhaled Nitric Oxide on Right Ventricular Flow Hemodynamics by 4-Dimensional-Flow Magnetic Resonance Imaging in Children With Pulmonary Arterial Hypertension. J Am Heart Assoc 2021; 10:e020548. [PMID: 33821682 PMCID: PMC8174179 DOI: 10.1161/jaha.120.020548] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background Pulmonary arterial hypertension (PAH) manifests with progressive right ventricular (RV) dysfunction, which eventually impairs the left ventricular function. We hypothesized that 4‐dimensional–flow magnetic resonance imaging can detect flow hemodynamic changes associated with efficient intracardiac flow during noninvasive inhaled nitric oxide (iNO) challenge in children with PAH. Methods and Results Children with PAH (n=10) underwent 2 same‐day separate iNO challenge tests using: (1) 4‐dimensional–flow magnetic resonance imaging and (2) standard catheterization hemodynamics. Intracardiac flow was evaluated using the particle tracking 4‐flow component analysis technique evaluating the direct flow, retained inflow, delayed ejection flow, and residual volume. Respective flow hemodynamic changes were compared with the corresponding catheterization iNO challenge results. The RV analysis revealed decreased direct flow in patients with PAH when compared with controls (P<0.001) and increase in residual volume (P<0.001). Similarly, the left ventricular analysis revealed decreased direct flow in patients with PAH when compared with controls (P=0.004) and increased proportion of the residual volume (P=0.014). There was an increase in the RV direct flow during iNO delivery (P=0.009), with parallel decrease in the residual volume (P=0.008). Conclusions Children with PAH have abnormal biventricular flow associated with impaired diastolic filling. The flow efficiency is significantly improved in the RV on iNO administration with no change in the left ventricle. The changes in the RV flow have occurred despite the minimal change in catheterization hemodynamics, suggesting that flow hemodynamic evaluation might provide more quantitative insights into vasoreactivity testing in PAH.
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Affiliation(s)
- Michal Schäfer
- Division of Cardiology Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Benjamin S Frank
- Division of Cardiology Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - D Dunbar Ivy
- Division of Cardiology Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Steven H Abman
- Division of Pulmonology Breathing Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Kurt R Stenmark
- Department of Critical Care and Pulmonary Medicine University of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Max B Mitchell
- Section of Congenital Heart Surgery Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Lorna P Browne
- Department of Radiology Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Alex J Barker
- Department of Radiology Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA.,Department of Bioengineering University of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Kendall S Hunter
- Department of Radiology Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Vitaly Kheyfets
- Department of Bioengineering University of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Kathleen Miller-Reed
- Division of Cardiology Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Richard Ing
- Department of Anesthesiology Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Gareth J Morgan
- Division of Cardiology Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA
| | - Uyen Truong
- Division of Cardiology Heart Institute Children's Hospital ColoradoUniversity of Colorado DenverAnschutz Medical Campus Aurora CO USA.,Heart Center Children's Hospital of RichmondVirginia Commonwealth University Richmond VA USA
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24
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Ma H, Liu XF, Qi XQ, Huang YH, Sun XX, Zhou L, Wu HP. Evaluation of Left Ventricular Diastolic Function by 2-D Speckle Tracking Echocardiography in Patients with Connective Tissue Disease-Associated Pulmonary Artery Hypertension. ULTRASOUND IN MEDICINE & BIOLOGY 2021; 47:910-918. [PMID: 33483161 DOI: 10.1016/j.ultrasmedbio.2020.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 08/06/2020] [Accepted: 09/14/2020] [Indexed: 06/12/2023]
Abstract
The purpose of this study was to evaluate the role of 2-D speckle tracking imaging in assessing left ventricular diastolic function in patients with connective tissue disease (CTD). A total of 98 CTD patients and 32 healthy controls were prospectively recruited. Early (E) and late (A) diastolic velocities of the transmitral flow were measured by pulsed Doppler echocardiography. Peak early diastolic myocardial velocity (E') was calculated on tissue Doppler echocardiography. The longitudinal strain rate (SR) was calculated as the average of three apical views, while circumferential and radial SRs were measured in three short-axis views. Pulmonary arterial hypertension (PAH) was defined as systolic pulmonary arterial pressure (sPAP) >36 mm Hg. Compared with the control group, CTD patients exhibited significant impairment of left ventricular diastolic function, manifested as lower global SR during early diastole (SRe) in the longitudinal deformation and higher E/SRe in both longitudinal and radial deformation. CTD-PAH patients had significantly lower SRe and higher E/SRe values in both the longitudinal and radial deformation compared with the patients with CTD without PAH. Pearson's correlation analysis revealed that sPAP levels correlated positively with E/E', longitudinal E/SRe, circumferential E/SRe and radial SRe, and it correlated negatively with septal E' and radial E/SRe. Receiver operating characteristic curve analysis suggested that E/E', longitudinal E/SRe and radial SRe could be used to predict PAH. The present study indicates that 2-D speckle tracking imaging is a useful method for evaluation of left ventricular diastolic function, and these derived parameters can serve as good predictors of PAH, but it may not be superior to the commonly used E/E' in CTD patients.
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Affiliation(s)
- Hong Ma
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xian-Fang Liu
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiao-Qing Qi
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ying-Heng Huang
- Department of Rheumatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiao-Xuan Sun
- Department of Rheumatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lei Zhou
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
| | - Hong-Ping Wu
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
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25
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Griffiths M, Yang J, Simpson CE, Vaidya D, Nies M, Brandal S, Damico R, Ivy DD, Austin ED, Pauciulo MW, Lutz KA, Rosenzweig EB, Hirsch R, Yung D, Nichols WC, Everett AD. ST2 Is a Biomarker of Pediatric Pulmonary Arterial Hypertension Severity and Clinical Worsening. Chest 2021; 160:297-306. [PMID: 33609516 DOI: 10.1016/j.chest.2021.01.085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 01/14/2021] [Accepted: 01/29/2021] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Pediatric pulmonary hypertension is a severe disease defined by sustained elevation of pulmonary artery pressures and pulmonary vascular resistance (PVR). Noninvasive diagnostic and prognostic markers that are more pulmonary vascular specific have been elusive because of disease heterogeneity and patient growth. RESEARCH QUESTION Is soluble suppressor of tumorigenicity (ST2) associated with pulmonary hemodynamic and functional changes in pediatric pulmonary hypertension? Does ST2 improve mortality risk models in pediatric pulmonary hypertension? STUDY DESIGN AND METHODS Two pediatric cohorts (age < 21 years) were assayed for ST2 and N-terminal prohormone B-natriuretic peptide: a cross-sectional cohort from the National Heart Lung and Blood Institute-funded National Biological Sample and Data Repository for PAH (PAHB) (N = 182), and a second longitudinal cohort from Children's Hospital of Colorado (N = 61). Adjusted linear regression was used for association with clinical variables. Clinical mortality models (the Registry to Evaluate Early and Long-Term PAH Disease Management [REVEAL] score) with and without ST2 were used to predict worsening outcomes and compared. Pulmonary artery endothelial and smooth muscle cell ST2 expression and secretion were assayed in vitro. RESULTS In an adjusted (age and sex) analysis in the PAHB, ST2 was significantly associated with shorter 6-min walk distance (P = .03) and increased PVR index (P = .02). In adjusted longitudinal regression in the Children's Hospital of Colorado cohort, ST2 was significantly associated with higher PVR index (P < .001), shorter 6-min walk distance (P = .01), and higher mean pulmonary artery pressure (P < .001). Although the REVEAL Risk Score Calculator 2.0 was predictive of clinical worsening in the PAHB (hazard ratio, 1.88), addition of ST2 significantly improved the model (hazard ratio, 2.05). In cell culture, ST2 was produced and secreted predominately by endothelial cells as opposed to smooth muscle cells (P < .0001). INTERPRETATION In two pediatric PAH cohorts, elevated ST2 was associated with unfavorable pulmonary hemodynamics and functional measures, clinical worsening, and significantly improved prediction of clinical worsening. Pulmonary artery endothelial cellular expression of ST2 suggests that ST2 is a more pulmonary vascular-specific marker for pulmonary hypertension.
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Affiliation(s)
- Megan Griffiths
- Division of Pediatric Cardiology, Department of Pediatrics, Johns Hopkins University, Baltimore, MD
| | - Jun Yang
- Division of Pediatric Cardiology, Department of Pediatrics, Johns Hopkins University, Baltimore, MD
| | - Catherine E Simpson
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, MD
| | - Dhananjay Vaidya
- Department of Internal Medicine, Johns Hopkins University, Baltimore, MD
| | - Melanie Nies
- Division of Pediatric Cardiology, Department of Pediatrics, Johns Hopkins University, Baltimore, MD
| | - Stephanie Brandal
- Division of Pediatric Cardiology, Department of Pediatrics, Johns Hopkins University, Baltimore, MD
| | - Rachel Damico
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, MD
| | - D Dunbar Ivy
- Division of Pediatric Cardiology, Children's Hospital Colorado, Denver, CO
| | - Eric D Austin
- Division of Allergy, Immunology, and Pulmonary Medicine, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN
| | - Michael W Pauciulo
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Katie A Lutz
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Erika B Rosenzweig
- Division of Pediatric Cardiology, Department of Pediatrics, Columbia University, New York, NY
| | - Russel Hirsch
- Division of Pediatric Cardiology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Delphine Yung
- Division of Pediatric Cardiology, Department of Pediatrics, University of Washington, Seattle, WA
| | - William C Nichols
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Allen D Everett
- Division of Pediatric Cardiology, Department of Pediatrics, Johns Hopkins University, Baltimore, MD.
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26
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Beghetti M, Berger RMF, Bonnet D, Grill S, Lesage C, Lemarie JC, Ivy DD. Echocardiographic Changes and Long-Term Clinical Outcomes in Pediatric Patients With Pulmonary Arterial Hypertension Treated With Bosentan for 72 Weeks: A Post-hoc Analysis From the FUTURE 3 Study. Front Pediatr 2021; 9:681538. [PMID: 34222150 PMCID: PMC8242164 DOI: 10.3389/fped.2021.681538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/14/2021] [Indexed: 11/25/2022] Open
Abstract
FormUlation of bosenTan in pUlmonary arterial hypeRtEnsion (FUTURE) 3 was a 24-week open-label, prospective, and randomized phase 3 study that assessed the pharmacokinetics of bosentan 2 mg/kg b.i.d. or t.i.d. in children with pulmonary arterial hypertension (PAH). We report findings from a post-hoc analysis that explored the prognostic value of echocardiographic changes during FUTURE 3 in relation to clinical outcomes observed during the 24-week core study and 48-week extension. Patients aged ≥3 months to <12 years (n = 64) received oral doses of bosentan 2 mg/kg b.i.d. or t.i.d. (1:1) for 24 weeks, after which they were eligible to enter the extension with continued bosentan administration. Echocardiographic evaluations were performed at baseline, Week 12, and 24 of the core study via central reading, and analyzed post-hoc for correlation with clinical outcomes (time to PAH worsening, time to death, and vital status). Sixty-four patients were randomized in the core study [median (IQR) age 3.8 (1.7-7.8) years]; and 58 patients (90.6%) entered the 48-week extension. Most of the patients (68.8%) were receiving ≥1 PAH medication at baseline. Echocardiographic changes during the core study were small but with high variability. There were statistically significant associations at Week 24 between worsening of the parameters, systolic left ventricular eccentricity index (LVEIS) and E/A ratio mitral valve flow, and the outcomes of time to death and time to PAH worsening. Additional studies that utilize simple and reproducible echocardiographic assessments are needed to confirm these findings and subsequently identify potential treatment goals in pediatric PAH.
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Affiliation(s)
- Maurice Beghetti
- Paediatric Cardiology Unit, Children's Hospital, Geneva, Switzerland.,Centre Universitaire Romand de Cardiologie et Chirurgie Cardiaque Pédiatriques, University of Lausanne, Lausanne, Switzerland
| | - Rolf M F Berger
- Department of Paediatric Cardiology, Centre for Congenital Heart Diseases, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Damien Bonnet
- M3C-Hospital Necker Enfants Malades, Department of Paediatric Cardiology, Université de Paris, Paris, France
| | - Simon Grill
- Actelion Pharmaceuticals Ltd., Allschwil, Switzerland
| | | | | | - D Dunbar Ivy
- Department of Pediatric Cardiology, Children's Hospital Colorado, Denver, CO, United States
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27
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Hansmann G, Sallmon H, Roehr CC, Kourembanas S, Austin ED, Koestenberger M. Pulmonary hypertension in bronchopulmonary dysplasia. Pediatr Res 2021; 89:446-455. [PMID: 32521539 PMCID: PMC7979539 DOI: 10.1038/s41390-020-0993-4] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/24/2020] [Accepted: 05/12/2020] [Indexed: 12/12/2022]
Abstract
Bronchopulmonary dysplasia (BPD) is a major complication in prematurely born infants. Pulmonary hypertension (PH) associated with BPD (BPD-PH) is characterized by alveolar diffusion impairment, abnormal vascular remodeling, and rarefication of pulmonary vessels (vascular growth arrest), which lead to increased pulmonary vascular resistance and right heart failure. About 25% of infants with moderate to severe BPD develop BPD-PH that is associated with high morbidity and mortality. The recent evolution of broader PH-targeted pharmacotherapy in adults has opened up new treatment options for infants with BPD-PH. Sildenafil became the mainstay of contemporary BPD-PH therapy. Additional medications, such as endothelin receptor antagonists and prostacyclin analogs/mimetics, are increasingly being investigated in infants with PH. However, pediatric data from prospective or randomized controlled trials are still sparse. We discuss comprehensive diagnostic and therapeutic strategies for BPD-PH and briefly review the relevant differential diagnoses of parenchymal and interstitial developmental lung diseases. In addition, we provide a practical framework for the management of children with BPD-PH, incorporating the modified definition and classification of pediatric PH from the 2018 World Symposium on Pulmonary Hypertension, and the 2019 EPPVDN consensus recommendations on established and newly developed therapeutic strategies. Finally, current gaps of knowledge and future research directions are discussed. IMPACT: PH in BPD substantially increases mortality. Treatment of BPD-PH should be conducted by an interdisciplinary team and follow our new treatment algorithm while still kept tailored to the individual patient. We discuss recent developments in BPD-PH, make recommendations on diagnosis, monitoring and treatment of PH in BPD, and address current gaps of knowledge and potential research directions. We provide a practical framework, including a new treatment algorithm, for the management of children with BPD-PH, incorporating the modified definition and classification of pediatric PH (2018 WSPH) and the 2019 EPPVDN consensus recommendations on established and newly developed therapeutic strategies for BPD-PH.
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Affiliation(s)
- Georg Hansmann
- Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany.
| | - Hannes Sallmon
- grid.6363.00000 0001 2218 4662Department of Pediatric Cardiology, Charité University Medical Center, Berlin, Germany
| | - Charles C. Roehr
- grid.410556.30000 0001 0440 1440Newborn Services, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK ,grid.4991.50000 0004 1936 8948National Perinatal Epidemiology Unit, Nuffield Department of Population Health, Medical Sciences Division, University of Oxford, Oxford, UK
| | - Stella Kourembanas
- grid.38142.3c000000041936754XDivision of Newborn Medicine, Boston Children’s Hospital, Harvard Medical School, Boston, MA USA
| | - Eric D. Austin
- grid.152326.10000 0001 2264 7217Division of Pediatric Pulmonary Medicine, Vanderbilt University, Nashville, TN USA
| | - Martin Koestenberger
- grid.11598.340000 0000 8988 2476Division of Pediatric Cardiology, Medical University of Graz, Graz, Austria
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28
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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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29
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Allison JD, Zehner C, Jia X, Hamzeh IR, Alam M, Nair A, Birnbaum Y. Assessing the Validity of Echocardiographic Criteria for Left Ventricular Diastolic Dysfunction in Patients with Pulmonary Hypertension. Cardiology 2020; 145:703-709. [PMID: 33032287 DOI: 10.1159/000510348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 07/11/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND In patients with pulmonary hypertension (PHT), the assessment of left ventricular (LV) diastolic function by echocardiography may not be reliable. PHT can affect Doppler parameters of LV diastolic function such as mitral inflow velocities and mitral annular velocities. The current guidelines for the assessment of LV diastolic function do not recommend specific adjustments for patients with PHT. METHODS We analyzed 36 patients from the PHT clinic that had an echocardiogram and right heart catheterization performed within 6 months of each other. Early mitral inflow velocity (E), lateral mitral annular velocity (lateral e'), septal mitral annular velocity (septal e'), tricuspid free wall annular velocity (RV e') were measured and compared to the invasively measured intracardiac pressures including pulmonary capillary wedge pressure (PCWP), mean pulmonary artery pressure, and right ventricular end-diastolic pressure. RESULTS Among patients with PHT, the specificity of the septal e' for LV diastolic dysfunction was 0.19, and the positive predictive value was 0.13 (lower than the lateral e' or E/average e'). By receiver-operating characteristic curve analysis, the area under the curve (AUC) of lateral and septal e' was just 0.64 (p = 0.9) and 0.53 (p = 0.6), respectively, while the AUC of average E/e' was 0.94 (p < 0.001). The septal e' was paradoxically lower at 6.5 ± 1.9 cm/s for normal PCWP compared to 6.9 ± 1.7 cm/s for elevated PCWP (p = 0.04). 81 versus 40% (p = 0.017) of patients with normal versus elevated PCWP had an abnormal septal e' <7 cm/s. By linear regression, there was no correlation between the Doppler parameters of LV diastolic function and the PCWP. CONCLUSION Our study suggests E/average e' may be the only reliable tissue Doppler parameter of LV diastolic dysfunction in patients with PHT, and that septal e' is paradoxically decreased in patients with PHT and normal left-sided filling pressures.
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Affiliation(s)
- John David Allison
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA,
| | - Carl Zehner
- Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Xiaoming Jia
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Ihab Rafic Hamzeh
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Mahboob Alam
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Ajith Nair
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Yochai Birnbaum
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
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30
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Truong U, Meinel K, Haddad F, Koestenberger M, Carlsen J, Ivy D, Jone PN. Update on noninvasive imaging of right ventricle dysfunction in pulmonary hypertension. Cardiovasc Diagn Ther 2020; 10:1604-1624. [PMID: 33224776 DOI: 10.21037/cdt-20-272] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Pulmonary hypertension (PH) is a progressive disease affecting patients across the life span. The pathophysiology primarily involves the pulmonary vasculature and right ventricle (RV), but eventually affects the left ventricular (LV) function as well. Safe, accurate imaging modalities are critical for diagnosis, serial monitoring, and tailored therapy. While cardiac catheterization remains the conventional modality for establishing diagnosis and serial monitoring, noninvasive imaging has gained considerable momentum in providing accurate assessment of the entire RV-pulmonary axis. In this state-of-the-art review, we will discuss the most recent developments in echocardiography, magnetic resonance imaging, and computed tomography in PH evaluation from pediatric to adult population.
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Affiliation(s)
- Uyen Truong
- Division of Pediatric Cardiology, Children's Hospital of Richmond, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Katharina Meinel
- Division of Pediatric Cardiology, Medical University of Graz, Graz, Austria
| | - Francois Haddad
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California, USA
| | | | - Jørn Carlsen
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Dunbar Ivy
- Division of Pediatric Cardiology, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Pei-Ni Jone
- Division of Pediatric Cardiology, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA
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Sehgal A, Steenhorst JJ, Mclennan DI, Merkus D, Ivy D, McNamara PJ. The Left Heart, Systemic Circulation, and Bronchopulmonary Dysplasia: Relevance to Pathophysiology and Therapeutics. J Pediatr 2020; 225:13-22.e2. [PMID: 32553872 DOI: 10.1016/j.jpeds.2020.06.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 06/06/2020] [Accepted: 06/09/2020] [Indexed: 12/25/2022]
Affiliation(s)
- Arvind Sehgal
- Monash Children's Hospital, Monash University, Melbourne, Australia; Department of Pediatrics, Monash University, Melbourne, Australia.
| | - Jarno J Steenhorst
- Department of Cardiology, Erasmus MC, Rotterdam, the Netherlands; Department of Pediatrics, Erasmus MC, Rotterdam, the Netherlands
| | - Daniel I Mclennan
- Department of Pediatrics, University of Iowa Children's Hospital, Dr, Iowa City, IA; Internal Medicine, University of Iowa Children's Hospital, Dr, Iowa City, IA
| | - Daphne Merkus
- Department of Cardiology, Erasmus MC, Rotterdam, the Netherlands; Department of Pediatrics, Erasmus MC, Rotterdam, the Netherlands; Institut für Chirurgische Forschung, Klinikum Universität München, Ludwig Maximillian Universität München, München, Germany
| | - Dunbar Ivy
- Pediatric Cardiology, University of Colorado School of Medicine, Children's Hospital Colorado, Aurora, CO
| | - Patrick J McNamara
- Department of Pediatrics, University of Iowa Children's Hospital, Dr, Iowa City, IA; Internal Medicine, University of Iowa Children's Hospital, Dr, Iowa City, IA
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Dao DT, Patel N, Harting MT, Lally KP, Lally PA, Buchmiller TL. Early Left Ventricular Dysfunction and Severe Pulmonary Hypertension Predict Adverse Outcomes in "Low-Risk" Congenital Diaphragmatic Hernia. Pediatr Crit Care Med 2020; 21:637-646. [PMID: 32168302 PMCID: PMC7335317 DOI: 10.1097/pcc.0000000000002318] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Given significant focus on improving survival for "high-risk" congenital diaphragmatic hernia, there is the potential to overlook the need to identify risk factors for suboptimal outcomes in "low-risk" congenital diaphragmatic hernia cases. We hypothesized that early cardiac dysfunction or severe pulmonary hypertension were predictors of adverse outcomes in this "low-risk" congenital diaphragmatic hernia population. DESIGN This is a retrospective cohort study using data from the Congenital Diaphragmatic Hernia Study Group registry. "Low-risk" congenital diaphragmatic hernia was defined as Congenital Diaphragmatic Hernia Study Group defect size A/B without structural cardiac and chromosomal anomalies. Examined risk factors included left ventricular dysfunction, right ventricular dysfunction, and severe pulmonary hypertension on the first postnatal echocardiogram. The primary outcome was composite adverse events, defined as either death, extracorporeal membrane oxygenation utilization, oxygen requirement on day 30 of life, or hospitalization greater than or equal to 8 weeks. Multivariable adjustment was performed with logistic regression and inverse probability weighting. SETTING Neonatal index hospitalization for congenital diaphragmatic hernia. PATIENTS "Low-risk" congenital diaphragmatic hernia infants born between January 2015 and December 2018. INTERVENTIONS First postnatal echocardiogram performed within 24 hours from birth. MEASUREMENTS AND MAIN RESULTS Seven-hundred seventy-eight patients were identified as "low-risk" congenital diaphragmatic hernia. Left ventricular dysfunction, right ventricular dysfunction, and severe pulmonary hypertension were present in 10.8%, 20.5%, and 57.5%, respectively. The primary outcome occurred in 21.3%. Death occurred in 3.0% and 9.1% used extracorporeal membrane oxygenation. On unadjusted analysis, all three risk factors were associated with the primary outcome. On all multivariable adjustment methods, left ventricular dysfunction and severe pulmonary hypertension remained significant predictors of adverse outcomes while right ventricular dysfunction no longer demonstrated any effect. CONCLUSIONS Early left ventricular dysfunction and severe pulmonary hypertension are independent predictors of adverse outcomes among "low-risk" congenital diaphragmatic hernia infants. Early recognition may lead to interventions that can improve outcome in this at-risk cohort.
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Affiliation(s)
- Duy T. Dao
- Department of Surgery, Boston Children’s Hospital, Boston, MA,Vascular Biology Program, Boston Children’s Hospital, Boston, MA
| | - Neil Patel
- Department of Neonatology, Royal Hospital for Children, Glasgow, United Kingdom
| | - Matthew T. Harting
- Department of Pediatric Surgery, McGovern Medical School at UTHealth and Children’s Memorial Hermann Hospital, Houston, TX
| | - Kevin P. Lally
- Department of Pediatric Surgery, McGovern Medical School at UTHealth and Children’s Memorial Hermann Hospital, Houston, TX
| | - Pamela A. Lally
- Department of Pediatric Surgery, McGovern Medical School at UTHealth and Children’s Memorial Hermann Hospital, Houston, TX
| | - Terry L. Buchmiller
- Department of Surgery, Boston Children’s Hospital, Boston, MA,Corresponding Author: Terry L. Buchmiller, MD, Department of Surgery, Boston Children’s Hospital, 300 Longwood Ave, Fegan 3, Boston, MA 02115, Phone: 617-355-6019, Fax: 617-730-0477,
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33
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The Assessment of Myocardial Strain by Cardiac Imaging in Healthy Infants with Acute Bronchiolitis: A Systematic Review and Meta-Analysis. Diagnostics (Basel) 2020; 10:diagnostics10060382. [PMID: 32521769 PMCID: PMC7345904 DOI: 10.3390/diagnostics10060382] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/04/2020] [Accepted: 06/06/2020] [Indexed: 12/28/2022] Open
Abstract
This study aims to systematically review the incidence of myocardial strain detected by echocardiography in previously healthy infants with acute bronchiolitis and its role as a predictor for adverse outcomes in this setting. METHODS Pubmed/Medline, Excerpta Medica Data Base (EMBASE), and Cochrane Library were searched in April 2020 to identify original observational prospective studies that systematically performed echocardiography for the screening of myocardial strain in healthy infants with acute bronchiolitis. Pooled estimates were generated using random-effects models. Heterogeneity within studies was assessed using Cochran's Q and I2 statistics. Funnel plots and Egger´s regression method were constructed to evaluate publication bias. Sensitivity analyses were also conducted to evaluate potential sources of heterogeneity. RESULTS After a detailed screening of 305 articles, a total of 10 studies with 395 participants (mean of 40 participants per study) was included. Five of them were classified as high-quality studies. Up to 28% of cases presented adverse outcomes. The echocardiographic screening for myocardial strain was performed within the first 24 h of admission in 92% cases. Tissue Doppler imaging and Speckle-Tracking echocardiography were performed only in 20% of cases. The presence of pulmonary hypertension was evaluated with methods different from the tricuspid regurgitation jet in 64% of cases. Seven studies found some grade of myocardial strain with a pooled incidence of 21% (CI 95%, 11-31%), in the form of pulmonary hypertension (pooled incidence of 20% (CI 95%, 11-30%)), and myocardial dysfunction (pooled incidence of 5% (CI 95%, 1-9%)). The presence of these echocardiographic alterations was associated with adverse outcomes (pooled relative risk = 16; CI 95%, 8.2-31.5). After a subgroup analysis based on the echocardiographic techniques used, no significant heterogeneity across the studies was observed. There was no evidence of publication bias when assessed by Egger´s test. Cardiac biomarkers to assess myocardial strain were used in five studies. Only N-terminal-pro-brain natriuretic peptide accurately predicted the presence of myocardial strain by echocardiography. CONCLUSIONS Myocardial strain is not infrequent in previously healthy infants with acute bronchiolitis, and it could be present at the early stages of the disease with prognostic implications. There is a need for sufficiently powered prospective studies with a similar methodology, preferably employing advanced imaging techniques, to conclusively address the usefulness of the assessment of myocardial strain in this setting.
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Burkett DA, Patel SS, Mertens L, Friedberg MK, Ivy DD. Relationship Between Left Ventricular Geometry and Invasive Hemodynamics in Pediatric Pulmonary Hypertension. Circ Cardiovasc Imaging 2020; 13:e009825. [PMID: 32408829 DOI: 10.1161/circimaging.119.009825] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Background Ventricular septal flattening, frequently present in pulmonary hypertension (PH), can be quantified using eccentricity index (EI). EI has not been evaluated by concurrent echocardiography and cardiac catheterization and traditionally does not account for postsystolic septal flattening, often seen in PH. We evaluated left ventricular shape, including a novel measure of maximal EI to account for postsystolic septal flattening, to establish the relationship with concurrent invasive hemodynamics. Methods Echocardiography was performed at 2 institutions in 78 pediatric PH patients during cardiac catheterization and in 78 matched controls. From midpapillary parasternal short-axis views, EI and right-to-left ventricular diameter ratio were assessed. Results EI and right-to-left ventricular measures were significantly increased in PH compared with controls. Shape measures correlated with invasive hemodynamics and PH outcome measures (PH-related hospitalization, functional class, medical therapy escalation, and BNP [brain natriuretic peptide]). End-systolic EI of 1.16 best identified the presence of PH, whereas a maximal EI of 1.42 and 1.94 best identified half-systemic and systemic PH, respectively. A maximal EI of 1.27 was associated with an odds ratio of 16.16 (95% CI, 6.62-39.46) for PH-related hospitalization or escalation of therapy. Conclusions Using simultaneous echocardiography and catheterization in the largest study population to date, we demonstrate that EI and right-to-left ventricular ratio correlate with invasive hemodynamics and outcomes measures, and EI can accurately define those with clinically important PH. These measures strengthen the ability of echocardiography to identify and follow pediatric PH patients, especially in the absence of methods to quantify right ventricular systolic pressures.
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Affiliation(s)
- Dale A Burkett
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado, Aurora (D.A.B., S.S.P., D.D.I)
| | - Sonali S Patel
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado, Aurora (D.A.B., S.S.P., D.D.I)
| | - Luc Mertens
- Division of Cardiology, Labatt Family Heart Center, Hospital for Sick Children, University of Toronto, Ontario, Canada (L.M., M.K.F.)
| | - Mark K Friedberg
- Division of Cardiology, Labatt Family Heart Center, Hospital for Sick Children, University of Toronto, Ontario, Canada (L.M., M.K.F.)
| | - D Dunbar Ivy
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado, Aurora (D.A.B., S.S.P., D.D.I)
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35
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Koestenberger M, Hansmann G. Left Ventricular Geometry and Near-Simultaneous Invasive Hemodynamics in Pediatric Pulmonary Hypertension. CIRCULATION. CARDIOVASCULAR IMAGING 2020; 13:e010787. [PMID: 32408826 DOI: 10.1161/circimaging.120.010787] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Martin Koestenberger
- Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Austria (M.K.).,European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany (M.K., G.H.)
| | - Georg Hansmann
- European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany (M.K., G.H.).,Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Germany (G.H.)
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Abstract
There is increasing evidence that cardiac dysfunction is a key contributor to CDH pathophysiology. Dysfunction in both right and left ventricles is common in the early neonatal period, contributes to clinical disease severity, and is associated with adverse outcomes including death and ECMO use. Early and routine assessment of ventricular function and pulmonary artery pressure may guide individualized clinical decision-making, including use of pulmonary vasodilators, cardiotropes, ECMO, and timing of surgical repair. Minimizing cardiac dysfunction, whether by prenatal, postnatal or perinatal treatment strategies, may lead to improved outcome in CDH.
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Affiliation(s)
- Neil Patel
- Department of Neonatology, Royal Hospital for Children, 1345 Govan Road, Glasgow G51 4TF, UK.
| | - Anna Claudia Massolo
- Department of Medical and Surgical Neonatology, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Florian Kipfmueller
- Department of Neonatology and Pediatric Critical Care Medicine, University of Bonn, Bonn, Germany
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37
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Frank BS, Schäfer M, Douwes JM, Ivy DD, Abman SH, Davidson JA, Burzlaff S, Mitchell MB, Morgan GJ, Browne LP, Barker AJ, Truong U, von Alvensleben JC. Novel measures of left ventricular electromechanical discoordination predict clinical outcomes in children with pulmonary arterial hypertension. Am J Physiol Heart Circ Physiol 2020; 318:H401-H412. [PMID: 31858817 PMCID: PMC7052618 DOI: 10.1152/ajpheart.00355.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 12/13/2019] [Accepted: 12/18/2019] [Indexed: 01/16/2023]
Abstract
Adverse ventricle-ventricle interaction and resultant left ventricular (LV) dysfunction are a recognized pathophysiological component of disease progression in pulmonary arterial hypertension (PAH) and can be associated with electrical and mechanical dyssynchrony. The purpose of this study was to investigate the clinical and mechanistic implications of LV electromechanical dyssynchrony in children with PAH by using novel systolic stretch and diastolic relaxation discoordination indexes derived noninvasively from cardiac MRI (CMR). In children with PAH referred for CMR (n = 64) and healthy controls (n = 20), we calculated two novel markers of ventricular discoordination, systolic stretch fraction (SSF) and diastolic relaxation fraction (DRF). SSF and DRF were evaluated with respect to 1) electrical dyssynchrony, 2) functional status, and 3) composite clinical outcomes. SSF was increased in patients with PAH compared with controls (P = 0.004). There was no difference in DRF between PAH and control groups. There were no differences between groups in standard mechanical dyssynchrony and LV global circumferential strain. Increased SSF was associated with greater electrical dyssynchrony (QRS duration) as well as worse WHO functional class. SSF, DRF, mechanical dyssynchrony, and right ventricular (RV) volumes were prognostic for worse clinical outcomes. LV dyssynchrony indexes are altered in pediatric patients with PAH compared with controls in proportion with greater degrees of RV dilation. Patients with PAH with greater dyssynchrony have worse clinical outcomes. RV-induced increased LV electromechanical dyssynchrony therefore may be an important link in the causal pathway from PAH to clinically significant LV dysfunction. Since dyssynchrony could precede overt LV dysfunction, addition of ventricular synchrony analysis to CMR postprocessing protocols may be of clinical benefit.NEW & NOTEWORTHY We demonstrate that left ventricular discoordination indexes are altered in pediatric patients with pulmonary arterial hypertension compared with controls and pediatric patients with pulmonary arterial hypertension with greater dyssynchrony have worse clinical outcomes. Furthermore, there is evidence for the mechanism of right ventricular-induced left ventricular discoordination to include a combination of delayed early systolic electromechanical activation, late-systolic septal shift, and prolonged, postsystolic septal thickening.
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Affiliation(s)
- Benjamin S Frank
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Michal Schäfer
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Johannes M Douwes
- Department of Pediatric Cardiology, Beatrix Children's Hospital, University Medical Centre Groningen, University of Groningen, The Netherlands
| | - D Dunbar Ivy
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
- Pediatric Heart Lung Center, Department of Pediatrics, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Steven H Abman
- Pediatric Heart Lung Center, Department of Pediatrics, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Jesse A Davidson
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Sandra Burzlaff
- Ludwig-Maxmilian Munich University, Faculty of Medicine, Munich, Germany
| | - Max B Mitchell
- Section of Congenital Heart Surgery, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Gareth J Morgan
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Lorna P Browne
- Department of Pediatric Radiology, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Alex J Barker
- Department of Pediatric Radiology, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Uyen Truong
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
| | - Johannes C von Alvensleben
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Denver | Anschutz Medical Campus, Aurora, Colorado
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First in human: the effects of biventricular pacing on cardiac output in severe pulmonary arterial hypertension. Heart Vessels 2019; 35:852-858. [PMID: 31792566 DOI: 10.1007/s00380-019-01540-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 11/22/2019] [Indexed: 10/25/2022]
Abstract
Pulmonary arterial hypertension (PAH) carries high morbidity and mortality despite available treatment options. In severe PAH, right ventricular (RV) diastolic pressure overload leads to interventricular septal bowing, hindering of left ventricular diastolic filling and reduced cardiac output (CO). Some animal studies suggest that pacing may mitigate this effect. We hypothesized that eliminating late diastole via ventricular pacing could improve CO in human subjects with severe PAH. Using minimal to no sedation, we performed transvenous acute biventricular (BiV) pacing and right heart catheterization in six patients with symptomatic PAH. Hemodynamic measurements were taken at baseline and during BiV pacing at various 20-ms intervals of V-V timing. We compared baseline CO to (1) CO while pacing the RV first by 80 ms (mimicking RV-only pacing), and then to (2) CO during pacing at the V-V timing that resulted in the highest CO. All participants were female, PASP 74 ± 14 mmHg, QRS duration 104 ± 20 ms. Compared with baseline, the CO decreased when the RV was paced first by 80 ms (7.2 ± 1.0 vs. 6.2 ± 1.1 L/min, p = 0.028). Pacing with optimal V-V timing produced CO similar to baseline (7.2 ± 1.0 vs. 7.4 ± 1.4, p = 0.92). Two patients (33%) met the predefined endpoint of a 15% increase in CO during pacing at the optimal V-V timing. In symptomatic PAH, V-V optimized acute BiV pacing does not consistently improve CO. However, acute BiV pacing did improve CO in a subset of this cohort. Further research is needed to identify predictors of response to cardiac resynchronization therapy in this population.
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Rodriguez-Gonzalez M, Perez-Reviriego AA, Castellano-Martinez A, Lubian-Lopez S, Benavente-Fernandez I. Left Ventricular Dysfunction and Plasmatic NT-proBNP Are Associated with Adverse Evolution in Respiratory Syncytial Virus Bronchiolitis. Diagnostics (Basel) 2019; 9:diagnostics9030085. [PMID: 31357664 PMCID: PMC6787702 DOI: 10.3390/diagnostics9030085] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 12/13/2022] Open
Abstract
AIM To investigate whether the presence of left ventricular myocardial dysfunction (LVMD) assessed by Tei index (LVTX) impacts the outcomes of healthy infants with Respiratory Syncytial Virus Bronchiolitis (RSVB). To explore whether N-terminal pro-B-type natriuretic peptide (NT-proBNP) increases the accuracy of traditional clinical markers in predicting the outcomes. METHODS A single-centre, prospective, cohort study including healthy infants aged 1-12 months old admitted for RSVB between 1 October 2016 and 1 April 2017. All patients underwent clinical, laboratory and echocardiographic evaluation within 24 h of admission. Paediatric intensive care unit (PICU) admission was defined as severe disease. RESULTS We enrolled 50 cases of RSVB (median age of 2 (1-6.5) months; 40% female) and 50 age-matched controls. We observed higher values of LVTX in infants with RSVB than in controls (0.42 vs. 0.36; p = 0.008). Up to nine (18%) children presented with LVMD (LVTX > 0.5), with a higher incidence of PICU admission (89% vs. 5%; p < 0.001). The diagnostic performance of NT-proBNP in predicting LVMD was high (area under the receiver operator characteristic curve (AUC) 0.95, CI 95% 0.90-1). The diagnostic yield of the predictive model for PICU admission that included NT-proBNP was excellent (AUC 0.945, CI 95% 0.880-1), and significantly higher than the model without NT-proBNP (p = 0.026). CONCLUSIONS LVMD could be present in healthy infants with RSVB who develop severe disease. NT-proBNP seems to improve traditional clinical markers for outcomes.
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Affiliation(s)
- Moises Rodriguez-Gonzalez
- Paediatric Cardiology Division, Puerta del Mar University Hospital, 11009 Cadiz, Spain.
- Biomedical Research and Innovation Institute of Cadiz (INiBICA), Research Unit, Puerta del Mar University Hospital, University of Cadiz, 11009 Cadiz, Spain.
| | - Alvaro Antonio Perez-Reviriego
- Paediatric Cardiology Division, Puerta del Mar University Hospital, 11009 Cadiz, Spain
- Biomedical Research and Innovation Institute of Cadiz (INiBICA), Research Unit, Puerta del Mar University Hospital, University of Cadiz, 11009 Cadiz, Spain
| | - Ana Castellano-Martinez
- Biomedical Research and Innovation Institute of Cadiz (INiBICA), Research Unit, Puerta del Mar University Hospital, University of Cadiz, 11009 Cadiz, Spain
- Paediatric Nephrology Division, Puerta del Mar University Hospital, 11009 Cadiz, Spain
| | - Simon Lubian-Lopez
- Biomedical Research and Innovation Institute of Cadiz (INiBICA), Research Unit, Puerta del Mar University Hospital, University of Cadiz, 11009 Cadiz, Spain
- Neonatology Division, Puerta del Mar University Hospital, 11009 Cadiz, Spain
| | - Isabel Benavente-Fernandez
- Biomedical Research and Innovation Institute of Cadiz (INiBICA), Research Unit, Puerta del Mar University Hospital, University of Cadiz, 11009 Cadiz, Spain
- Neonatology Division, Puerta del Mar University Hospital, 11009 Cadiz, Spain
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Koestenberger M, Sallmon H, Avian A, Cantinotti M, Gamillscheg A, Kurath-Koller S, Schweintzger S, Hansmann G. Ventricular-ventricular interaction variables correlate with surrogate variables of clinical outcome in children with pulmonary hypertension. Pulm Circ 2019; 9:2045894019854074. [PMID: 31099302 PMCID: PMC6542130 DOI: 10.1177/2045894019854074] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Determination of biventricular dimensions, function, and ventricular–ventricular interactions (VVI) is an essential part of the echocardiographic examination in adults with pulmonary hypertension (PH); however, data from according pediatric studies are sparse. We hypothesized that left and right heart dimensions/function and VVI variables indicate disease severity and progression in children with PH. Left heart, right heart, and VVI variables (e.g. end-systolic LV eccentricity index [LVEI], right ventricular [RV]/left ventricular [LV] dimension ratio) were echocardiographically determined in 57 children with PH, and correlated with New York Heart Association (NYHA) functional class (FC), N-terminal-pro brain natriuretic peptide (NT-proBNP), and invasive hemodynamic variables (e.g. pulmonary vascular resistance index [PVRi]). Clinically sicker patients (higher NYHA FC) had lower LV ejection fraction (LVEF) and higher LVEI – a surrogate of LV compression. In PH children, the ratio of systolic pulmonary arterial pressure divided by systolic systemic arterial pressure (sPAP/sSAP) and the PVRi correlated well with the LVEI (P < 0.001). Patients with more severe PH (sPAP/sSAP ratio, PVRi) had increased RV/LV and right-to-left atrial dimension ratios (P < 0.01). When stratified using NYHA-FC, sicker PH children had greater RV and right atrial dimensions with lower exercise capacity, while the tricuspid annular plane systolic excursion as surrogate for longitudinal systolic RV function decreased. Consistent with previous studies, serum NT-proBNP correlated with both, sPAP/sSAP ratio (P < 0.001) and NYHA FC (P < 0.01). Taken together, the VVI variables LVEI and RV/LV dimension ratio are associated with lower FC, worse hemodynamics, and higher NT-proBNP levels, thus highlighting the importance of ventricular interdependence in pediatric PH.
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Affiliation(s)
- Martin Koestenberger
- 1 Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Austria.,2 European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Hannes Sallmon
- 2 European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany.,3 Department of Pediatric Cardiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Alexander Avian
- 4 Institute for Medical Informatics, Statistics and Documentation, Medical University Graz, Austria
| | | | - Andreas Gamillscheg
- 1 Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Austria.,2 European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Stefan Kurath-Koller
- 1 Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Austria.,2 European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany
| | - Sabrina Schweintzger
- 1 Division of Pediatric Cardiology, Department of Pediatrics, Medical University Graz, Austria
| | - Georg Hansmann
- 2 European Pediatric Pulmonary Vascular Disease Network, Berlin, Germany.,6 Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany
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41
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Zhang J, Chen J, Cheong B, Pednekar A, Muthupillai R. High frame rate cardiac cine MRI for the evaluation of diastolic function and its direct correlation with echocardiography. J Magn Reson Imaging 2019; 50:1571-1582. [PMID: 31111984 DOI: 10.1002/jmri.26791] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/30/2019] [Accepted: 05/01/2019] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Breath-hold cine MR is the method of choice for evaluating left ventricular (LV) systolic function; however, the evaluation of diastolic function remains in the domain of high frame rate echocardiography. Thus, a cine MR technique for simultaneously evaluating LV systolic and diastolic function would be clinically valuable. PURPOSE To test the feasibility of extracting indices that characterize LV diastolic function from high frame rate cine MR. STUDY TYPE Single center, prospective. POPULATION Asymptomatic volunteers (N = 24; age 45.8 ± 12.3 years). FIELD STRENGTH/SEQUENCE High frame rate (70 fps) cine MR and phase-contrast MR during free breathing were acquired at 1.5T. ASSESSMENT The following MR-based LV filling metrics were extracted from LV volume changes during the cardiac cycle: 1) the volume-rate ratio, REFP /RLFP (ratio of the peak LV filling rate during the early filling period [EFP] to that during the late filling period [LFP]); and 2) the volume ratio, VEFP /VLFP (the ratio of cumulative LV volume change between the EFP and LFP). These metrics were then compared with traditional transmitral blood flow-based MR and echocardiographic indices. The effect of temporal resolution on these metrics was also evaluated. STATISTICAL TESTS Bland-Altman and linear regression analyses were used to evaluate the performance of the proposed metrics against traditional indices of diastolic function. RESULTS The REFP /RLFP and VEFP /VLFP correlated well with E/AQ-flow (r 2 = 0.66 and 0.54, respectively) and E/Aecho (r 2 = 0.58 and 0.49, respectively). Systolic indices remained robust (<3% error) for frame rates ≥20 fps. Although the proposed VEFP /VLFP was robust (<5% error) up to 25 fps, the proposed volume-rate diastolic function metrics were less reliable (>8% error) for frame rates below 35 fps. DATA CONCLUSION In asymptomatic volunteers, cardiac cine MR images acquired at frame rates >35 fps can be used to extract LV diastolic function indices from the temporal changes in LV volume. LEVEL OF EVIDENCE 1 Technical Efficacy Stage: 1 J. Magn. Reson. Imaging 2019;50:1571-1582.
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Affiliation(s)
- Jiming Zhang
- Department of Diagnostic and Interventional Radiology, CHI St. Luke's Health-Baylor St. Luke's Medical Center, Houston, Texas, USA
| | - Jie Chen
- Department of Diagnostic and Interventional Radiology, CHI St. Luke's Health-Baylor St. Luke's Medical Center, Houston, Texas, USA
| | - Benjamin Cheong
- Department of Diagnostic and Interventional Radiology, CHI St. Luke's Health-Baylor St. Luke's Medical Center, Houston, Texas, USA.,Department of Non-invasive Cardiology, Texas Heart Institute, Houston, Texas, USA
| | - Amol Pednekar
- Department of Diagnostic and Interventional Radiology, CHI St. Luke's Health-Baylor St. Luke's Medical Center, Houston, Texas, USA.,Department of Radiology, Texas Children's Hospital, Houston, Texas, USA
| | - Raja Muthupillai
- Department of Diagnostic and Interventional Radiology, CHI St. Luke's Health-Baylor St. Luke's Medical Center, Houston, Texas, USA.,Department of Non-invasive Cardiology, Texas Heart Institute, Houston, Texas, USA
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42
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Latham GJ, Yung D. Current understanding and perioperative management of pediatric pulmonary hypertension. Paediatr Anaesth 2019; 29:441-456. [PMID: 30414333 DOI: 10.1111/pan.13542] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/20/2018] [Accepted: 11/02/2018] [Indexed: 11/27/2022]
Abstract
Pediatric pulmonary hypertension is a complex disease with multiple, diverse etiologies affecting the premature neonate to the young adult. Pediatric pulmonary arterial hypertension, whether idiopathic or associated with congenital heart disease, is the most commonly discussed form of pediatric pulmonary hypertension, as it is progressive and lethal. However, neonatal forms of pulmonary hypertension are vastly more frequent, and while most cases are transient, the risk of morbidity and mortality in this group deserves recognition. Pulmonary hypertension due to left heart disease is another subset increasingly recognized as an important cause of pediatric pulmonary hypertension. One aspect of pediatric pulmonary hypertension is very clear: anesthetizing the child with pulmonary hypertension is associated with a significantly heightened risk of morbidity and mortality. It is therefore imperative that anesthesiologists who care for children with pulmonary hypertension have a firm understanding of the pathophysiology of the various forms of pediatric pulmonary hypertension, the impact of anesthesia and sedation in the setting of pulmonary hypertension, and anesthesiologists' role as perioperative experts from preoperative planning to postoperative disposition. This review summarizes the current understanding of pediatric pulmonary hypertension physiology, preoperative risk stratification, anesthetic risk, and intraoperative considerations relevant to the underlying pathophysiology of various forms of pediatric pulmonary hypertension.
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Affiliation(s)
- Gregory J Latham
- Department of Anesthesiology and Pain Medicine, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Delphine Yung
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
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43
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Agrawal V, Byrd BF, Brittain EL. Echocardiographic evaluation of diastolic function in the setting of pulmonary hypertension. Pulm Circ 2019; 9:2045894019826043. [PMID: 30783522 PMCID: PMC6366003 DOI: 10.1177/2045894019826043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 12/14/2018] [Indexed: 11/30/2022] Open
Abstract
Heart failure due to diastolic dysfunction and pulmonary hypertension are frequent comorbid conditions with significant morbidity and mortality. Identifying the presence and etiology of diastolic dysfunction in the setting of pulmonary hypertension remains challenging despite profound therapeutic and prognostic implications. Additionally, there is little guidance in identifying and parsing etiology of diastolic dysfunction in patients found to have pulmonary hypertension. This review discusses the complex interplay between left ventricular diastolic dysfunction and pulmonary hypertension. With an explicit focus on the use of echocardiography for determination of diastolic dysfunction and etiology of pulmonary hypertension, this review also provides a comprehensive review of the literature and provides a framework by which to assess diastolic dysfunction echocardiographically in the setting of pulmonary hypertension.
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Affiliation(s)
- Vineet Agrawal
- Division of Cardiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Benjamin F Byrd
- Division of Cardiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Evan L Brittain
- Division of Cardiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
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44
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Kheyfets V, Truong U, Ivy D, Shandas R. Structural and Biomechanical Adaptations of Right Ventricular Remodeling - in Pulmonary Arterial Hypertension - Reduces Left Ventricular Rotation During Contraction: A Computational Study. J Biomech Eng 2019; 141:2724083. [PMID: 30714069 DOI: 10.1115/1.4042682] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Indexed: 11/08/2022]
Abstract
Pulmonary hypertension (PH) is a degenerative disease characterized by progressively increased right ventricular (RV) afterload that leads to ultimate functional decline [1]. Recent observational studies have documented a decrease in left ventricular (LV) torsion during ejection, with preserved LV ejection fraction (EF) in pediatric and adult PH patients [2-4]. The objective of this study was to develop a computational model of the bi-ventricular heart and use it to evaluate changes in LV torsion mechanics in response to mechanical, structural, and hemodynamic changes in the RV free-wall. The heart model revealed that LV apex rotation and torsion were decreased when increasing RV mechanical rigidity and during re-orientation of RV myocardial fibers. Furthermore, structural changes to the RV appear to have a notable impact on RV EF, but little influence on LV EF. Finally, RV pressure overload exponentially increased LV myocardial stress. The computational results found in this study are consistent with clinical observations in adult and pediatric PH patients, which reveal a decrease in LV torsion with preserved LV EF [3, 4]. Furthermore, discovered causes of decreased LV torsion are consistent with RV structural adaptations seen in PH rodent studies [5], which might also explain suspected stress-induced changes in LV myocardial gene/protein expression.
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Affiliation(s)
- Vitaly Kheyfets
- University of Colorado Anschutz Medical Campus, Children's Hospital Colorado
| | - Uyen Truong
- University of Colorado Anschutz Medical Campus, Children's Hospital Colorado
| | - Dunbar Ivy
- University of Colorado Anschutz Medical Campus, Children's Hospital Colorado
| | - Robin Shandas
- University of Colorado Anschutz Medical Campus, Children's Hospital Colorado
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45
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Massolo AC, Paria A, Hunter L, Finlay E, Davis CF, Patel N. Ventricular Dysfunction, Interdependence, and Mechanical Dispersion in Newborn Infants with Congenital Diaphragmatic Hernia. Neonatology 2019; 116:68-75. [PMID: 31085915 DOI: 10.1159/000499347] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/26/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Congenital diaphragmatic hernia (CDH) is an important cause of mortality and morbidity in the neonatal period. Pulmonary hypertension and pulmonary hypoplasia are key pathological findings. Cardiac function may also be an important determinant of disease severity, prognostic indicator, and therapeutic target in CDH. OBJECTIVE The aim of this study was to assess ventricular mechanics and synchrony in infants with CDH and controls using speckle tracking echocardiography (STE). METHODS Retrospective analysis was performed of echocardiograms obtained in the first 48 h of life in 27 infants with CDH and 20 controls. STE-derived longitudinal strain (LS) was measured in the right and left ventricles (RV, LV). Circumferential strain (CS) and radial strain (RS) were additionally measured in the LV. Mechanical dispersion (MD), a measure of synchrony, was assessed by calculation of the standard deviation of time to peak systolic strain in six ventricular segments. RESULTS RV LS and LV LS, LV CS, and LV RS were significantly reduced in CDH compared to controls. In the LV free wall, LS and RS were significantly reduced in CDH. LV LS correlated significantly with RV LS in CDH cases (r2 = 0.37, p = 0.002), but not controls (r2 = 0.19, p = 0.06). LV LS also correlated with LV MD in CDH (r2 = 0.25, p = 0.01) but not controls (r2 = 0.02, p = 0.54). CONCLUSIONS Global impairment of RV and LV systolic function are present in newborn infants with CDH and are associated with primary left ventricular dysfunction, ventricular interdependence, and MD.
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Affiliation(s)
- Anna Claudia Massolo
- Department of Medical and Surgical Neonatology, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy,
| | - Anshuman Paria
- Department of Neonatology, Royal Hospital for Children, Glasgow, United Kingdom
| | - Lindsey Hunter
- Department of Paediatric Cardiology, Royal Hospital for Children, Glasgow, United Kingdom
| | - Emma Finlay
- Department of Paediatric Cardiology, Royal Hospital for Children, Glasgow, United Kingdom
| | - Carl F Davis
- Department of Paediatric Surgery, Royal Hospital for Children, Glasgow, United Kingdom
| | - Neil Patel
- Department of Neonatology, Royal Hospital for Children, Glasgow, United Kingdom
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46
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Bautista-Rodriguez C, Sanchez-de-Toledo J, Da Cruz EM. The Role of Echocardiography in Neonates and Pediatric Patients on Extracorporeal Membrane Oxygenation. Front Pediatr 2018; 6:297. [PMID: 30416991 PMCID: PMC6212474 DOI: 10.3389/fped.2018.00297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 09/21/2018] [Indexed: 11/13/2022] Open
Abstract
Indications for extracorporeal membrane oxygenation (ECMO) and extracorporeal cardiopulmonary resuscitation (ECPR) are expanding, and echocardiography is a tool of utmost importance to assess safety, effectiveness and readiness for circuit initiation and separation. Echocardiography is key to anticipating complications and improving outcomes. Understanding the patient's as well as the ECMO circuit's anatomy and physiology is crucial prior to any ECMO echocardiographic evaluation. It is also vital to acknowledge that the utility of echocardiography in ECMO patients is not limited to the evaluation of cardiac function, and that clinical decisions should not be made exclusively upon echocardiographic findings. Though echocardiography has specific indications and applications, it also has limitations, characterized as: prior to and during cannulation, throughout the ECMO run, upon separation and after separation from the circuit. The use of specific and consistent echocardiographic protocols for patients on ECMO is recommended.
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Affiliation(s)
- Carles Bautista-Rodriguez
- Pediatric Cardiology Department, Hospital Sant Joan de Deu Barcelona, Universitat de Barcelona, Barcelona, Spain
- Department of Paediatric Cardiology, Royal Brompton Hospital, London, United Kingdom
| | - Joan Sanchez-de-Toledo
- Pediatric Cardiology Department, Hospital Sant Joan de Deu Barcelona, Universitat de Barcelona, Barcelona, Spain
- Division of Cardiac Intensive Care, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Eduardo M. Da Cruz
- Department of Pediatrics, Heart Institute, Children's Hospital Colorado, School of Medicine, University of Colorado Denver, Aurora, CO, United States
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47
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Hansmann G. Left Ventricular Diastolic Dysfunction in Pediatric Pulmonary Hypertension. Circ Cardiovasc Imaging 2018; 9:CIRCIMAGING.116.005527. [PMID: 27581954 DOI: 10.1161/circimaging.116.005527] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Georg Hansmann
- From the Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Germany.
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48
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Schäfer M, Wilson N, Ivy DD, Ing R, Abman S, Browne LP, Morgan G, Ross M, McLennan D, Barker AJ, Fonseca B, Di Maria M, Hunter KS, Truong U. Noninvasive wave intensity analysis predicts functional worsening in children with pulmonary arterial hypertension. Am J Physiol Heart Circ Physiol 2018; 315:H968-H977. [PMID: 30004811 DOI: 10.1152/ajpheart.00227.2018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The purpose of the present study was to characterize pulmonary vascular stiffness using wave intensity analysis (WIA) in children with pulmonary arterial hypertension (PAH), compare the WIA indexes with catheterization- and MRI-derived hemodynamics, and assess the prognostic ability of WIA-derived biomarkers to predict the functional worsening. WIA was performed in children with PAH ( n = 40) and healthy control subjects ( n = 15) from phase-contrast MRI-derived flow and area waveforms in the main pulmonary artery (MPA). From comprehensive WIA spectra, we collected and compared with healthy control subjects forward compression waves (FCW), backward compression waves (BCW), forward decompression waves (FDW), and wave propagation speed ( c-MPA). There was no difference in the magnitude of FCW between PAH and control groups (88 vs. 108 mm5·s-1·ml-1, P = 0.239). The magnitude of BCW was increased in patients with PAH (32 vs. 5 mm5·s-1·ml-1, P < 0.001). There was no difference in magnitude of indexed FDW (32 vs. 28 mm5·s-1·ml-1, P = 0.856). c-MPA was increased in patients with PAH (3.2 vs. 1.6 m/s, P < 0.001). BCW and FCW correlated with mean pulmonary arterial pressure, right ventricular volumes, and ejection fraction. Elevated indexed BCW [heart rate (HR) = 2.91, confidence interval (CI): 1.18-7.55, P = 0.019], reduced indexed FDW (HR = 0.34, CI: 0.11-0.90, P = 0.030), and increased c-MPA (HR = 3.67, CI: 1.47-10.20, P = 0.004) were strongly associated with functional worsening of disease severity. Our results suggest that noninvasively derived biomarkers of pulmonary vascular resistance and stiffness may be helpful for determining prognosis and monitoring disease progression in children with PAH. NEW & NOTEWORTHY Wave intensity analysis (WIA) studies are lacking in children with pulmonary arterial hypertension (PAH) partially because WIA, which is necessary to assess vascular stiffness, requires an invasive pressure-derived waveform along with simultaneous flow measurements. We analyzed vascular stiffness using WIA in children with PAH who underwent phase-contrast MRI and observed significant differences in WIA indexes between patients with PAH and control subjects. Furthermore, WIA indexes were predictive of functional worsening and were associated with standard catheterization measures.
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Affiliation(s)
- Michal Schäfer
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Neil Wilson
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - D Dunbar Ivy
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Richard Ing
- Division of Pediatric Cardiac Anesthesiology, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Steven Abman
- Division of Pulmonology, Breathing Institute, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Lorna P Browne
- Department of Radiology, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Gareth Morgan
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Michael Ross
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Daniel McLennan
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Alex J Barker
- Department of Radiology, Feinberg School of Medicine, Northwestern University , Chicago, Illinois
| | - Brian Fonseca
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Michael Di Maria
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Kendall S Hunter
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Uyen Truong
- Division of Cardiology, Heart Institute, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus , Aurora, Colorado
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49
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Friedberg MK. Imaging Right-Left Ventricular Interactions. JACC Cardiovasc Imaging 2018; 11:755-771. [DOI: 10.1016/j.jcmg.2018.01.028] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 12/22/2017] [Accepted: 01/25/2018] [Indexed: 11/25/2022]
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50
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Roldan Ramos S, Pieles G, Hui W, Slorach C, Redington AN, Friedberg MK. A rabbit model of progressive chronic right ventricular pressure overload. Interact Cardiovasc Thorac Surg 2018; 26:673-680. [PMID: 29211855 DOI: 10.1093/icvts/ivx372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 10/14/2017] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Right ventricular (RV) failure from increased pressure loading is a frequent consequence of acquired and congenital heart diseases. However, the mechanisms involved in their pathophysiology are still unclear, and few data exist on RV pressure-loading models and early versus late effects on RV and left ventricular responses. We characterized a rabbit model of chronic RV pressure overload and early-late effects on biventricular function. METHODS Twenty-one New Zealand white rabbits were randomized into 3 groups: (i) sham, (ii) pulmonary artery (PA) banding (PAB) for 3 weeks (PAB3W) and (iii) PAB for 6 weeks (PAB6W). Progressive RV pressure overload was created by serial band inflation using an adjustable device. Molecular, echocardiographic and haemodynamic studies were performed. RESULTS RV pressure overload was achieved with clinical manifestations of RV failure. Heart and liver weights were significantly higher after PAB. PAB-induced echocardiographic ventricular remodelling increased wall thickness and stress and ventricular dilation. Cardiac output (ml/min) (sham 172.4 ± 42.86 vs PAB3W 103.1 ± 23.14 vs PAB6W 144 ± 60.9, P = 0.0027) and systolic and diastolic functions decreased; with increased RV end-systolic and end-diastolic pressures (mmHg) (sham 1.6 ± 0.66 vs PAB3W 3.9 ± 1.8 vs PAB6W 5.2 ± 2.2, P = 0.0103), despite increased contractility [end-systolic pressure-volume relationship (mmHg/ml), sham 3.76 ± 1.76 vs PAB3W 12.21 ± 3.44 vs PAB6W 19.4 ± 6.88, P < 0.0001]. Functional parameters further worsened after PAB6W versus PAB3W. LV contractility increased in both the PAB groups, despite worsening of other invasive measures of systolic and diastolic functions. CONCLUSIONS We describe a novel, unique model of chronic RV pressure overload leading to early biventricular dysfunction and fibrosis with further progression at 6 weeks. These findings can aid in guiding management.
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Affiliation(s)
- Sara Roldan Ramos
- Department of Paediatric Cardiology, Hospital for Sick Children, Toronto, ON, Canada
- Department of Congenital Cardiac Surgery, Bristol Heart Institute and Hospital for Sick Children, Bristol, UK
| | - Guido Pieles
- Department of Paediatric Cardiology, Hospital for Sick Children, Toronto, ON, Canada
- Department of Pediatric Cardiology, Bristol Heart Institute and Hospital for Sick Children, Bristol, UK
| | - Wei Hui
- Department of Paediatric Cardiology, Hospital for Sick Children, Toronto, ON, Canada
| | - Cameron Slorach
- Department of Paediatric Cardiology, Hospital for Sick Children, Toronto, ON, Canada
| | - Andrew N Redington
- Department of Paediatric Cardiology, Hospital for Sick Children, Toronto, ON, Canada
| | - Mark K Friedberg
- Department of Paediatric Cardiology, Hospital for Sick Children, Toronto, ON, Canada
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