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Jalal Z, Langouet E, Dib N, Le-Quellenec S, Mostefa-Kara M, Martin A, Roubertie F, Thambo JB. Role and Applications of Experimental Animal Models of Fontan Circulation. J Clin Med 2024; 13:2601. [PMID: 38731130 PMCID: PMC11084605 DOI: 10.3390/jcm13092601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/17/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Over the last four decades, the Fontan operation has been the treatment of choice for children born with complex congenital heart diseases and a single-ventricle physiology. However, therapeutic options remain limited and despite ongoing improvements in initial surgical repair, patients still experience a multiplicity of cardiovascular complications. The causes for cardiovascular failure are multifactorial and include systemic ventricular dysfunction, pulmonary vascular resistance, atrioventricular valve regurgitation, arrhythmia, development of collaterals, protein-losing enteropathy, hepatic dysfunction, and plastic bronchitis, among others. The mechanisms leading to these late complications remain to be fully elucidated. Experimental animal models have been developed as preclinical steps that enable a better understanding of the underlying pathophysiology. They furthermore play a key role in the evaluation of the efficacy and safety of new medical devices prior to their use in human clinical studies. However, these experimental models have several limitations. In this review, we aim to provide an overview of the evolution and progress of the various types of experimental animal models used in the Fontan procedure published to date in the literature. A special focus is placed on experimental studies performed on animal models of the Fontan procedure with or without mechanical circulatory support as well as a description of their impact in the evolution of the Fontan design. We also highlight the contribution of animal models to our understanding of the pathophysiology and assess forthcoming developments that may improve the contribution of animal models for the testing of new therapeutic solutions.
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Affiliation(s)
- Zakaria Jalal
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| | - Elise Langouet
- Department of Pediatric and Adult Congenital Cardiology Anesthesiology, University Hospital of Bordeaux, 33600 Pessac, France;
| | - Nabil Dib
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| | | | - Mansour Mostefa-Kara
- Adult Congenital Heart Disease Medico-Surgical Unit, European Georges Pompidou Hospital, 75015 Paris, France;
| | - Amandine Martin
- Department of Cardiac Surgery, University Hospital, 97400 Saint-Denis, France;
| | - François Roubertie
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| | - Jean-Benoît Thambo
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
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Toyoshima K, Aoki H, Noguchi T, Saito N, Shimizu T, Kemmotsu T, Shimokaze T, Saito T, Shibasaki J, Kawataki M, Asou T, Tachibana T, Masutani S. Biventricular function in preterm infants with patent ductus arteriosus ligation: A three-dimensional echocardiographic study. Pediatr Res 2024:10.1038/s41390-024-03180-w. [PMID: 38615076 DOI: 10.1038/s41390-024-03180-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 02/05/2024] [Accepted: 03/23/2024] [Indexed: 04/15/2024]
Abstract
BACKGROUND The detailed hemodynamics after patent ductus arteriosus (PDA) ligation in preterm infants remain unknown. We aimed to clarify the effect of surgical ligation on left ventricular (LV) and right ventricular (RV) volume and function. METHODS Echocardiography was performed in 41 preterm infants (median gestational age: 25 weeks) before and after PDA ligation. Global longitudinal strain was determined using three-dimensional speckle-tracking echocardiography. These values were compared with those in 36 preterm infants without PDA (non-PDA). RESULTS Preoperatively, the PDA group had greater end-diastolic volume (EDV) and cardiac output (CO) in both ventricles, a higher LV ejection fraction (LVEF) (53% vs 44%) and LV global longitudinal strain, and a lower RVEF (47% vs 52%) than the non-PDA group. At 4-8 h postoperatively, the two groups had a similar LVEDV and RVEDV. However, the PDA group had a lower EF and CO in both ventricles than the non-PDA group. At 24-48 h postoperatively, the RVEF was increased, but the LVEF remained decreased, and LVCO was increased. CONCLUSIONS PDA induces biventricular loading and functional abnormalities in preterm infants, and they dramatically change after surgery. Three-dimensional echocardiography may be beneficial to understand the status of both ventricles. IMPACT Preterm infants are at high risk of hemodynamic compromise following a sudden change in loading conditions after PDA ligation. Three-dimensional echocardiography enables quantitative and serial evaluation of ventricular function and volume in preterm infants with PDA. PDA induces biventricular loading and functional abnormalities in preterm infants, and they dramatically change after surgery.
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Affiliation(s)
- Katsuaki Toyoshima
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan.
| | - Hirosato Aoki
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Takahiro Noguchi
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Naka Saito
- Department of Clinical Laboratory, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tatsuto Shimizu
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Takahiro Kemmotsu
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tomoyuki Shimokaze
- Department of Neonatology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tomoko Saito
- 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
| | - Toshihide Asou
- Department of Cardiovascular Surgery, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tsuyoshi Tachibana
- Department of Cardiovascular Surgery, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
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Fialho GL, Verrier RL, D'Avila A, Melo HM, Wolf P, Walz R, Lin K. Dual assessment of abnormal cardiac electrical dispersion and diastolic dysfunction for early detection of the epileptic heart condition. J Electrocardiol 2023; 78:69-75. [PMID: 36805647 DOI: 10.1016/j.jelectrocard.2023.02.001] [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: 01/03/2023] [Revised: 01/27/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023]
Abstract
BACKGROUND People with epilepsy (PWE) are at increased risk for premature death due to many factors. Sudden unexpected death in epilepsy (SUDEP) is among the most important causes of death in these individuals and possibly, sudden cardiac death (SCD) in epilepsy is also as important. The possibility of concurrent derangement in electrical and mechanical cardiac function, which could be a marker of early cardiac involvement in PWE, has not been investigated in that population. METHODS Electrical dispersion indices (T-wave peak to T-wave end, TpTe; QT dispersion, QTd; QT interval corrected for heart rate, QTc) were analyzed in patients with pharmacoresistant temporal lobe epilepsy and compared to a control group. The electromechanical relationship between those indices and echocardiographic parameters were further assessed in PWE. RESULTS In 19 PWE and 21 controls, we found greater TpTe and QTd in PWE (TpTe: 91.6 ± 16.4 ms vs. 65.2 ± 12.1 ms, p < 0.0001; and QTd: 45.3 ± 13.1 ms vs. 19 ± 6.2 ms, p < 0.0001, respectively). QTc was similar between PWE and controls (419.2 ± 31.4 ms vs. 435.1 ± 31.4 ms, p = 0.12). In multivariate linear regression, TpTe, QTc, and epilepsy duration were related to left ventricular mass; QTc was associated with left atrial volume; QTc, the number of seizures per month, epilepsy duration and antiseizure medication explained 81% of E/A mitral wave Doppler ratio. CONCLUSIONS This is the first report to demonstrate concurrent electrical dispersion and diastolic dysfunction in PWE. These noninvasive biomarkers could prove useful in early detection of the "Epileptic Heart" condition.
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Affiliation(s)
- Guilherme Loureiro Fialho
- Cardiology Division, Department of Internal Medicine, University Hospital (HU) Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Postgraduate Program in Medical Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Center for Applied Neuroscience, University Hospital (HU), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Richard L Verrier
- Beth Israel Deaconess Medical Center, Department of Medicine, Division of Cardiovascular Medicine, Harvard Medical School, Boston, MA, USA.
| | - Andre D'Avila
- Beth Israel Deaconess Medical Center, Department of Medicine, Division of Cardiovascular Medicine, Harvard Medical School, Boston, MA, USA
| | - Hiago Murilo Melo
- Postgraduate Program in Medical Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Center for Applied Neuroscience, University Hospital (HU), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Peter Wolf
- Postgraduate Program in Medical Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Danish Epilepsy Centre, Dianalund, Denmark; Neurology Division, Department of Internal Medicine, University Hospital, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Roger Walz
- Postgraduate Program in Medical Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Center for Applied Neuroscience, University Hospital (HU), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Neurology Division, Department of Internal Medicine, University Hospital, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Center for Epilepsy Surgery of Santa Catarina (CEPESC), University Hospital (HU), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Katia Lin
- Postgraduate Program in Medical Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Center for Applied Neuroscience, University Hospital (HU), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Neurology Division, Department of Internal Medicine, University Hospital, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil; Center for Epilepsy Surgery of Santa Catarina (CEPESC), University Hospital (HU), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
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A computational study of aortic reconstruction in single ventricle patients. Biomech Model Mechanobiol 2023; 22:357-377. [PMID: 36335184 PMCID: PMC10174275 DOI: 10.1007/s10237-022-01650-w] [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: 05/21/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022]
Abstract
Patients with hypoplastic left heart syndrome (HLHS) are born with an underdeveloped left heart. They typically receive a sequence of surgeries that result in a single ventricle physiology called the Fontan circulation. While these patients usually survive into early adulthood, they are at risk for medical complications, partially due to their lower than normal cardiac output, which leads to insufficient cerebral and gut perfusion. While clinical imaging data can provide detailed insight into cardiovascular function within the imaged region, it is difficult to use these data for assessing deficiencies in the rest of the body and for deriving blood pressure dynamics. Data from patients used in this paper include three-dimensional, magnetic resonance angiograms (MRA), time-resolved phase contrast cardiac magnetic resonance images (4D-MRI) and sphygmomanometer blood pressure measurements. The 4D-MRI images provide detailed insight into velocity and flow in vessels within the imaged region, but they cannot predict flow in the rest of the body, nor do they provide values of blood pressure. To remedy these limitations, this study combines the MRA, 4D-MRI, and pressure data with 1D fluid dynamics models to predict hemodynamics in the major systemic arteries, including the cerebral and gut vasculature. A specific focus is placed on studying the impact of aortic reconstruction occurring during the first surgery that results in abnormal vessel morphology. To study these effects, we compare simulations for an HLHS patient with simulations for a matched control patient that has double outlet right ventricle (DORV) physiology with a native aorta. Our results show that the HLHS patient has hypertensive pressures in the brain as well as reduced flow to the gut. Wave intensity analysis suggests that the HLHS patient has irregular circulatory function during light upright exercise conditions and that predicted wall shear stresses are lower than normal, suggesting the HLHS patient may have hypertension.
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Bansal PB, Zaidi AN, Bansal N, Stern KWD, Mahgerefteh J. Impact of Obesity on Ventriculo-Arterial Interaction in Patients After Coarctation of Aorta repair. Pediatr Cardiol 2023:10.1007/s00246-023-03104-1. [PMID: 36690764 DOI: 10.1007/s00246-023-03104-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 01/13/2023] [Indexed: 01/25/2023]
Abstract
Survival of patients after repair of coarctation of Aorta (CoA) has improved significantly over the decades, but patients have decreased life expectancy as compared to the general population. This has been attributed to increased hypertension, cerebrovascular disease, and coronary artery disease. There has also been an increasing concern of overweight and obesity in patients with adult congenital heart disease. While there have been studies looking at the impact of long-term hypertension on myocardial performance and outcomes in this population, this study aims to assess the impact of obesity in these patients on their myocardial performance. Ventriculo-arterial coupling is used as a measure of myocardial performance which reflects the interaction between cardiac contractility and arterial elastance. Patients after CoA repair are known to have hypertension affecting the arterial elastance. Obesity affects cardiac contractility as well. This study demonstrated that in a group of young patients after CoA repair, body mass index (BMI) has a relationship with left ventricular (LV) contractility and myocardial performance. This relationship was independent of blood pressure. BMI itself was not seen to affect the determinants of diastolic function in this study, suggesting that LV contractility may be affected before one can notice a change in the diastolic function secondary to BMI.
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Affiliation(s)
| | - Ali N Zaidi
- Icahn School of Medicine at Mount Sinai, New York, USA
| | - Neha Bansal
- Icahn School of Medicine at Mount Sinai, New York, USA
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Osuga T, Morita T, Sasaki N, Morishita K, Ohta H, Takiguchi M. Prognostic value of left ventricular-arterial coupling estimated using echocardiography in dogs with myxomatous mitral valve disease. J Vet Intern Med 2021; 35:2607-2615. [PMID: 34741477 PMCID: PMC8692204 DOI: 10.1111/jvim.16290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 10/05/2021] [Accepted: 10/12/2021] [Indexed: 11/29/2022] Open
Abstract
Background The interaction between the left ventricle (LV) and systemic arterial systems, known as left ventricular‐arterial coupling (VAC), has been evaluated based on the effective arterial elastance (Ea) to LV end‐systolic elastance (Ees) ratio (Ea/Ees). The Ea reflects the total arterial load of LV, whereas Ees reflects the LV systolic function. A recent study found that inappropriate VAC based on increased Ea/Ees estimated by echocardiography is associated with advanced disease severity in dogs with myxomatous mitral valve disease (MMVD). Hypothesis Inappropriate VAC assessed by echocardiographic estimation of Ea/Ees is associated with a worse prognosis in dogs with MMVD. Animals Eighty‐nine dogs with MMVD. Methods Prospective cohort study. Dogs underwent echocardiographic examinations at enrollment. The Ea was estimated using the formula: mean blood pressure/(forward stroke volume/body weight). The Ees was estimated using the formula: mean blood pressure/(LV end‐systolic volume/body weight). The Ea/Ees was calculated. Results By end of study, 22 dogs died of cardiac‐related causes with 67 dogs censored. Dogs with increased Ea/Ees (Ea/Ees >0.34; median survival time, 527 days; 95% confidence interval [CI], 322 days‐not determinable) had a shorter survival time (P < .0001) than those without increased Ea/Ees (Ea/Ees ≤0.34; median survival time, >1112 days; 95% CI, not determinable). Multivariate Cox proportional hazard analysis showed that Ea/Ees, body weight, peak systolic mitral annular velocity, and the peak early diastolic transmitral velocity‐to‐peak early diastolic mitral annular velocity ratio were independent predictors of cardiac‐related death among echocardiographic indices. Conclusions and Clinical Importance Inappropriate VAC assessed based on echocardiographically‐estimated Ea/Ees is associated with a worse prognosis in dogs with MMVD.
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Affiliation(s)
- Tatsuyuki Osuga
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tomoya Morita
- Laboratory of Veterinary Internal Medicine, Department of Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Noboru Sasaki
- Laboratory of Veterinary Internal Medicine, Department of Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Keitaro Morishita
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Hiroshi Ohta
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mitsuyoshi Takiguchi
- Laboratory of Veterinary Internal Medicine, Department of Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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Oh J, Lee BA, Shin WJ, Jeong D, Yun TJ, Park CS, Choi ES, Song IK. Clinical implication of intraoperative ventricular-arterial coupling in pediatric patients undergoing ventricular septal defects repair: A retrospective cohort study. Paediatr Anaesth 2021; 31:1216-1224. [PMID: 34398480 DOI: 10.1111/pan.14277] [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: 09/16/2020] [Revised: 05/29/2021] [Accepted: 08/11/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Ventricular-arterial coupling is the ratio of arterial elastance to ventricular end-systolic elastance. AIMS The objective of this study was to determine the clinical implication of intraoperative ventricular-arterial coupling derived from the pressure-area relationship using transesophageal echocardiography. METHODS This retrospective study reviewed the medical records of 72 pediatric patients with ventricular septal defects who underwent corrective surgery with cardiopulmonary bypass. The single-beat modified method was used to assess ventricular-arterial coupling. Logistic regression analyses were performed to determine the correlation between ventricular-arterial coupling and early postoperative outcomes, including the maximum vasoactive-inotropic score, length of mechanical ventilation, and length of hospital stay. RESULTS Ventricular-arterial coupling after cardiopulmonary bypass significantly increased (from 1.0 ± 0.4 to 1.4 ± 0.8, p < .001), indicating a disproportionate increase in the arterial elastance index (from 11.5 ± 5.1 to 19.8 ± 7.5 mmHg/cm2 /m2 , p < .001) compared with the ventricular end-systolic elastance index (from 13.0 ± 6.9 to 16.9 ± 9.0 mmHg/cm2 /m2 , p < .001). Logistic regression analyses revealed that high postoperative ventricular-arterial coupling was independently associated with higher postoperative maximum vasoactive-inotropic score (>10; odds ratio [OR], 8.04; 95% confidence interval [CI], 1.38-46.85, p = .020), longer postoperative mechanical ventilation (>15 h; OR: 11.00; 95% CI: 1.26-96.45, p = .030), and longer postoperative hospital stay (>7 days; OR: 2.98; 95% CI: 1.04-8.58, p = .043). CONCLUSIONS Ventricular-arterial coupling can be easily obtained from the intraoperative transesophageal echocardiography in pediatric patients undergoing ventricular septal defects repair. High postoperative ventricular-arterial coupling is strongly associated with worse early postoperative outcomes. Ventricular-arterial coupling shows promise as an intraoperative analysis tool that can provide insight into the impact of interventions on cardiovascular performance and identify potential targets for treatment in this population.
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Affiliation(s)
- Jimi Oh
- Department of Anesthesiology and Pain Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Byungdoo Andrew Lee
- Laboratory for Cardiovascular Dynamics, Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Won-Jung Shin
- Laboratory for Cardiovascular Dynamics, Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - DaUn Jeong
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Tae-Jin Yun
- Department of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Chun Soo Park
- Department of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Eun Seok Choi
- Department of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - In-Kyung Song
- Laboratory for Cardiovascular Dynamics, Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Ono M, Burri M, Mayr B, Anderl L, Strbad M, Cleuziou J, Hager A, Hörer J, Lange R. Risk Factors for Failed Fontan Procedure After Stage 2 Palliation. Ann Thorac Surg 2021; 112:610-618. [DOI: 10.1016/j.athoracsur.2020.06.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 06/04/2020] [Accepted: 06/08/2020] [Indexed: 11/25/2022]
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Naik RB, Srivastava CP, Arsiwala S, Mathur A, Sharma S. Early outcomes after the on pump bidirectional Glenn procedure: A single center experience. J Card Surg 2021; 36:3207-3214. [PMID: 34091970 DOI: 10.1111/jocs.15719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 04/19/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Bidirectional Glenn procedure is a staged palliative procedure for patients with the univentricular hearts or complex congenital heart disease. We in our study, attempted to evaluate the preoperative characteristics, operative data and the early postoperative outcomes in the patients who underwent Bidirectional Glenn procedure at our center. METHODS In our single center retrospective experience, 115 patients underwent Bidirectional Glenn procedure from January 2015 to December 2019. RESULTS The mean age of the patients was 6.55 ± 6.5 years (range from 9 months to 48 years) and a median of 5 years. The most common anatomic diagnosis was double outlet right ventricle (n = 49, 42.6%). The primary diagnosis and the additional cardiac anamolies were not associated with the adverse outcomes. The increased cardiopulmonary bypass and operative time affect the postoperative outcomes. The median oxygen saturation in the patients postoperatively was 82%. The median postoperative stay was 8 days. The early postoperative complications were seen in 29 patients (25.2%). There were 12 early deaths (10.4%) in our study. The late age of presentation and poor preoperative nutrition, increased the risk of the postoperative morbidity and mortality. CONCLUSION Bidirectional Glenn procedure is an effective procedure to improve efficacy of the gas exchange and reduce volume overload on the single ventricle at early as well as late stages. However, the late age of presentation increases the risk of the postoperative outcomes.
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Affiliation(s)
- Ranajit B Naik
- Department of Cardiothoracic and Vascular Surgery, Narayana Multispeciality Hospital, Jaipur, Rajasthan, India
| | - Chandra Prakash Srivastava
- Department of Cardiothoracic and Vascular Surgery, Narayana Multispeciality Hospital, Jaipur, Rajasthan, India
| | - Saify Arsiwala
- Department of Cardiothoracic and Vascular Surgery, Narayana Multispeciality Hospital, Jaipur, Rajasthan, India
| | - Ankit Mathur
- Department of Cardiothoracic and Vascular Surgery, Narayana Multispeciality Hospital, Jaipur, Rajasthan, India
| | - Sunil Sharma
- Department of Cardiothoracic and Vascular Surgery, Narayana Multispeciality Hospital, Jaipur, Rajasthan, India
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Ono M, Kido T, Burri M, Anderl L, Ruf B, Cleuziou J, Strbad M, Hager A, Hörer J, Lange R. Risk Factors for Thrombus Formation at Stage 2 Palliation and Its Effect on Long-Term Outcome in Patients With Univentricular Heart. Semin Thorac Cardiovasc Surg 2021; 34:669-679. [PMID: 33691189 DOI: 10.1053/j.semtcvs.2021.02.024] [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: 01/10/2021] [Accepted: 02/01/2021] [Indexed: 01/19/2023]
Abstract
Thrombus formation is a feared complication following bidirectional cavopulmonary shunt (BCPS). We aimed to investigate the effect of thrombus formation on outcome. BCPS was performed in 525 patients at our center between 1998 and 2018. The impacts of thrombus formation on survival and probability of Fontan completion were analyzed, and risk factors for thrombus formation were examined. Thrombus formation occurred in 30 patients (5.7%). Compared with the remaining 495 patients, there was no significant difference in the median age at BCPS (4.9 vs 4.7 months; P = 0.587). However, unbalanced atrioventricular septal defects (17 vs 5%; P = 0.008) and preoperative ventricular dysfunction (23.3 vs 8%; P = 0.004) were more frequent in patients who developed a thrombus. Thrombolytic therapy was performed in all patients and surgical thrombus removal was required in 13 patients. In-hospital mortality was higher in patients with thrombus (30.0 vs 2.2%; P < 0.001). Of 505 hospital survivors, an estimated survival at 1 year after hospital discharge following BCPS was 84.4% (95% CI, 76.1-92.7%) in patients with thrombus and 96.8% (95% CI, 96.0-97.6%) in those without (P < 0.001). Cumulative incidence of Fontan completion at 3 years after BCPS was 52.8% (95% CI, 30.3-75.2%) in patients with thrombus and 90.1% (95% CI, 87.2-92.9%) in those without (P = 0.004). Higher left atrial pressure (OR = 1.165; P = 0.029) and longer cardiopulmonary bypass time (OR = 1.013, P = 0.001) at BCPS were independent risk factors for thrombus formation after BCPS. Thrombus formation after BCPS poses a significant risk for survival and Fontan completion. Preoperative higher left atrial pressure and longer cardiopulmonary bypass time are significant risk factors.
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Affiliation(s)
- Masamichi Ono
- Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technische Universität München, Germany.
| | - Takashi Kido
- Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technische Universität München, Germany
| | - Melchior Burri
- Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Germany
| | - Lisa Anderl
- Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technische Universität München, Germany
| | - Bettina Ruf
- Department of Pediatric Cardiology and Congenital Heart Disease, German Heart Center Munich, Technische Universität München, Germany
| | - Julie Cleuziou
- Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technische Universität München, Germany; German Center for Cardiovascular Research, Munich, Germany
| | - Martina Strbad
- Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technische Universität München, Germany
| | - Alfred Hager
- Department of Pediatric Cardiology and Congenital Heart Disease, German Heart Center Munich, Technische Universität München, Germany
| | - Jürgen Hörer
- Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technische Universität München, Germany
| | - Rüdiger Lange
- Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Germany; German Center for Cardiovascular Research, Munich, Germany
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11
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Osuga T, Morita T, Sasaki N, Morishita K, Ohta H, Takiguchi M. Echocardiographic estimation of left ventricular-arterial coupling in dogs with myxomatous mitral valve disease. J Vet Intern Med 2021; 35:78-87. [PMID: 33442907 PMCID: PMC7848320 DOI: 10.1111/jvim.16028] [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: 06/18/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 11/29/2022] Open
Abstract
Background The effective arterial elastance (Ea) to left ventricular (LV) end‐systolic elastance (Ees) ratio (Ea/Ees) is an index of the interaction between LV and systemic arterial systems, left ventricular‐arterial coupling (VAC). The Ea is an index of total arterial load of the LV, whereas Ees is an index of LV systolic function. In humans, inappropriate VAC based on increased Ea/Ees estimated using echocardiography is associated with more advanced heart disease severity. Hypothesis Left ventricular‐arterial coupling assessed by echocardiographic estimation of Ea/Ees is associated with disease severity in dogs with myxomatous mitral valve disease (MMVD). Animals Ninety MMVD dogs and 61 healthy dogs. Methods Prospective cross‐sectional study. The MMVD dogs were classified into stages B1, B2, or C according to American College of Veterinary Internal Medicine guidelines. Effective arterial elastance was echocardiographically estimated using the formula: mean blood pressure/(forward stroke volume/body weight). End‐systolic elastance was echocardiographically estimated using the formula: mean blood pressure/(LV end‐systolic volume/body weight). The ratio Ea/Ees was calculated. Results The ratio Ea/Ees was higher in stage B2 dogs than in healthy dogs and dogs stage B1 (both P < .0001), and higher in stage C dogs than in healthy dogs and dogs in the other 2 stages (healthy vs C and B1 vs C, P < .0001; B2 vs C, P = .0005). Multivariable logistic regression analysis showed that Ea/Ees and the peak velocity of early diastolic transmitral flow to isovolumic relaxation time ratio were independent predictors of stage C among echocardiographic indices in MMVD dogs. Conclusions and Clinical Importance Inappropriate VAC assessed by echocardiographically estimated Ea/Ees is associated with advanced disease severity in dogs with MMVD.
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Affiliation(s)
- Tatsuyuki Osuga
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tomoya Morita
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Noboru Sasaki
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Keitaro Morishita
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Hiroshi Ohta
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mitsuyoshi Takiguchi
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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12
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Fialho GL, Wolf P, Walz R, Lin K. Left ventricle end-systolic elastance, arterial-effective elastance, and ventricle-arterial coupling in Epilepsy. Acta Neurol Scand 2021; 143:34-38. [PMID: 32772359 DOI: 10.1111/ane.13334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/27/2020] [Accepted: 08/04/2020] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Sudden unexpected death in epilepsy (SUDEP) is a tragic event. Cardiac models of sudden death state that, paradoxically, healthy individuals compose most of the victims of this event. Exploration of cardiac physiological variables related to outcome could help unveil risk markers for sudden death in epilepsy. We investigated left ventricle end-systolic elastance, arterial-effective elastance and ventricle-arterial coupling (VAC) in PWE compared with controls. MATERIAL & METHODS Adult patients with temporal lobe epilepsy without known cardiovascular diseases were submitted to treadmill test and transthoracic echocardiogram. Individuals without epilepsy matched by sex, age, and body mass index composed the control group. Cardiac risk factors, exercise performance, autonomic data from treadmill test, systolic and diastolic function, morphological cardiac data, and left ventricle pressure-volume loop were recorded. RESULTS Sixty subjects were consecutively enrolled (30 PWE and 30 controls). Epilepsy duration was 22.5 ± 10.7 years (age of onset 15.2 ± 10.1 years). Treadmill variables were significantly worse in TLE patients compared with controls. End-systolic elastance, arterial-effective elastance, and ventricle-arterial coupling were similar between groups. Female sex, percentage of maximal predicted heart rate achieved in exercise, exercise time, and epilepsy duration explained 28,4% of VAC in PWE in multiple stepwise linear regression (P = .018). CONCLUSIONS Some aspects of the cardiac pressure-volume curves, mainly linked to left ventricle systolic performance, contractile function and their interaction with afterload appears normal in young PWE and cannot explain their increase risk to adverse outcomes or lower physical fitness.
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Affiliation(s)
- Guilherme L. Fialho
- Cardiology Division Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Medical Sciences Post‐graduate Program Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
| | - Peter Wolf
- Medical Sciences Post‐graduate Program Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Neurology Division Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Danish Epilepsy Centre Dianalund Denmark
| | - Roger Walz
- Medical Sciences Post‐graduate Program Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Neurology Division Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Center for Applied Neurosciences (CeNAp) Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
| | - Katia Lin
- Medical Sciences Post‐graduate Program Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Neurology Division Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
- Center for Applied Neurosciences (CeNAp) Federal University of Santa Catarina, (UFSC) Florianópolis Brazil
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13
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Kowatari R, Suzuki Y, Daitoku K, Fukuda I. Long-term results of additional pulmonary blood flow with bidirectional cavopulmonary shunt. J Cardiothorac Surg 2020; 15:279. [PMID: 32993722 PMCID: PMC7526092 DOI: 10.1186/s13019-020-01335-4] [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: 05/29/2020] [Accepted: 09/22/2020] [Indexed: 11/17/2022] Open
Abstract
Objective We evaluated additional pulmonary blood flow at the time of bidirectional cavopulmonary shunt and its effects on the Fontan procedure and long-term outcome of Fontan circulation and liver function. Methods We included 22 patients (16 boys, 6 girls) having undergone bidirectional cavopulmonary shunt with additional pulmonary blood flow between April 2002 and January 2016. Mean age and body weight were 20 ± 13 months and 7.5 ± 6.5 kg, respectively. We retrospectively evaluated the patients’ clinical data, including cardiac catheterization data, liver function, and liver fibrosis markers. Results All patients were alive with a New York Heart Association status of I at the long-term follow-up. Changes between pre-bidirectional cavopulmonary shunt and 101 months after the Fontan procedure included the following: the cardiothoracic ratio of chest X-ray decreased from 52.2 ± 3.9% to 41.8 ± 5.9% (p < 0.001); systemic ventricle end-diastolic pressure decreased from 11.4 ± 3.2 mmHg to 6.9 ± 3.6 mmHg (p < 0.001); and the pulmonary artery index decreased from 485.1 ± 272.3 to 269.5 ± 100.5 (p = 0.02). Type IV collagen, hyaluronic acid, and procollagen levels increased over the normal range 116 months after the Fontan procedure. Conclusions The additional pulmonary blood flow at the time of bidirectional cavopulmonary shunt may contribute to pulmonary arterial growth at the Fontan procedure with low pulmonary arterial resistance and without ventricle volume overload. The Fontan circulation was well-maintained at the long-term follow-up, while liver fibrosis markers were above their normal values.
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Affiliation(s)
- Ryosuke Kowatari
- Department of Thoracic and Cardiovascular Surgery, Hirosaki University School of Medicine, 5 Zaifucho, Hirosaki, Aomori, 036-8562, Japan.
| | - Yasuyuki Suzuki
- Department of Cardiovascular Surgery, Ibaraki Clinical Education and Training Center, University of Tsukuba Hospital, Tsukuba, Ibaraki, 305-8576, Japan
| | - Kazuyuki Daitoku
- Department of Thoracic and Cardiovascular Surgery, Hirosaki University School of Medicine, 5 Zaifucho, Hirosaki, Aomori, 036-8562, Japan
| | - Ikuo Fukuda
- Department of Thoracic and Cardiovascular Surgery, Hirosaki University School of Medicine, 5 Zaifucho, Hirosaki, Aomori, 036-8562, Japan
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14
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Shiose A, Tanoue Y, Ushijima T, Tatewaki H. Simultaneous performance of implantable left ventricular assist device implantation and the Fontan operation in a patient with fulminant myocarditis leading to asystole. J Heart Lung Transplant 2020; 39:988-990. [PMID: 32439290 DOI: 10.1016/j.healun.2020.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 03/04/2020] [Accepted: 04/12/2020] [Indexed: 11/16/2022] Open
Affiliation(s)
- Akira Shiose
- Departments of Cardiovascular Surgery, Kyushu University, Fukuoka, Japan.
| | - Yoshihisa Tanoue
- Departments of Advanced Cardiopulmonary Failure, Kyushu University, Fukuoka, Japan
| | - Tomoki Ushijima
- Departments of Cardiovascular Surgery, Kyushu University, Fukuoka, Japan
| | - Hideki Tatewaki
- Departments of Cardiovascular Surgery, Kyushu University, Fukuoka, Japan
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15
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Chen X, Yuan H, Liu J, Zhang N, Zhou C, Huang M, Jian Q, Zhuang J. Hemodynamic Effects of Additional Pulmonary Blood Flow on Glenn and Fontan Circulation. Cardiovasc Eng Technol 2020; 11:268-282. [PMID: 32072439 DOI: 10.1007/s13239-020-00459-x] [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: 06/19/2019] [Accepted: 02/10/2020] [Indexed: 10/25/2022]
Abstract
PURPOSE Additional pulmonary blood flow (APBF) can provide better pulsating blood flow and systemic arterial oxygen saturation, while low blood pulsation and low oxygen saturation are defects of the Fontan and Glenn procedure. Studying the hemodynamic effect of APBF is beneficial for clinical decisions. This study aimed to explore the effect on particle washout, as well as the differences among the sensitivities of both different hemodynamic parameters and different procedures to APBF. METHODS The patient-specific clinical datasets of a patient who underwent bilateral bidirectional Glenn (BBDG) with APBF were enrolled in this study, and using these datasets, Glenn- and Fontan-type artery models were reconstructed. A series of parameters, including the total caval flow pulsatility index (TCPI), indexed energy loss (iPL), wall shear stress (WSS), systemic arterial oxygen saturation (Satart), particle washout time (WOT), pressure in the right superior vena cava (PRSVC), pulmonary flow distribution (PFD) and hepatic flow distribution (HFD), were computed from computational fluid dynamic (CFD) simulation to evaluate the hemodynamic effect of APBF. RESULTS The result showed that APBF led to better iPL and Satart but worse PRSVC and heart load accompanied by a great impact on HFD, making hepatic flow easier to perfuse the side without MPA and APBF. The increase in the APBF rate also effectively results in larger flow pulsation, region velocity, and wall shear stress and lower WOT, and this effect may be more effective for patients with persistent left superior vena cava (PLSVC). However, APBF might have little effect on PFD. Furthermore, APBF might affect WOT, iPL and HFD more significantly than PRSVC and has a greater improvement effect in patients with poorer iPL and WOT. CONCLUSIONS Moderate APBF is not only a measure to promote pulmonary artery growth and systemic arterial oxygen saturation but also an effective method against endothelial dysfunction and thrombosis. However, moderate APBF is patient-specific and should be determined based on hemodynamic preference that leads to desired patient outcomes, and care should be taken to prevent PRSVC and heart load from being too high as well as an imbalance in HFD.
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Affiliation(s)
- Xiangyu Chen
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510000, China
| | - Haiyun Yuan
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Department of Cardiovascular Surgery, Guangdong Provincial People's Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, 510000, China
| | - Jiawei Liu
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510000, China
| | - Neichuan Zhang
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510000, China
| | - Chengbin Zhou
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Department of Cardiovascular Surgery, Guangdong Provincial People's Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, 510000, China
| | - Meiping Huang
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Department of Catheterization Lab, Guangdong Provincial People's Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Qifei Jian
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510000, China.
| | - Jian Zhuang
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Department of Cardiovascular Surgery, Guangdong Provincial People's Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, 510000, China.
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Abstract
BACKGROUND Late Fontan survivors are at high risk to experience heart failure and death. Therefore, the current study sought to investigate the role of non-invasive diagnostics as prognostic markers for failure of the systemic ventricle following Fontan procedure. METHODS This monocentric, longitudinal observational study included 60 patients with a median age of 24.5 (19-29) years, who were subjected to cardiac magnetic resonance imaging, echocardiography, cardiopulmonary exercise testing, and blood analysis. The primary endpoint of this study was decompensated heart failure with symptoms at rest, peripheral and/or pulmonary edema, and/or death. RESULTS During a follow-up of 24 months, 5 patients died and 5 patients suffered from decompensated heart failure. Clinical (NYHA class, initial surgery), functional (VO2 peak, ejection fraction, cardiac index), circulating biomarkers (N-terminal pro brain natriuretic peptide), and imaging parameters (end diastolic volume index, end systolic volume index, mass-index, contractility, afterload) were significantly related to the primary endpoint. Multi-variate regression analysis identified afterload as assessed by cardiac magnetic resonance imaging as an independent predictor of the primary endpoint (hazard ratio 1.98, 95% confidence interval 1.19-3.29, p = 0.009). CONCLUSION We identified distinct parameters of cardiopulmonary exercise testing, cardiac magnetic resonance imaging, and blood testing as markers for future decompensated heart failure and death in patients with Fontan circulation. Importantly, our data also identify increased afterload as an independent predictor for increased morbidity and mortality. This parameter is easy to assess by non-invasive cardiac magnetic resonance imaging. Its modulation may represent a potential therapeutic approach target in these high-risk patients.
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17
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Yamashita Y, Tanoue Y, Sonoda H, Ushijima T, Kimura S, Oishi Y, Tatewaki H, Hiasa K, Arita T, Shiose A. Comparison of cardiac energetics after transcatheter and surgical aortic valve replacements. Interact Cardiovasc Thorac Surg 2019; 28:587-593. [PMID: 30364945 DOI: 10.1093/icvts/ivy292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 08/17/2018] [Accepted: 09/16/2018] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The effect of transcatheter aortic valve replacement (TAVR) on cardiac energetics has not been described. We compared changes in cardiac energetics after TAVR with those after surgical aortic valve replacement (SAVR). METHODS We retrospectively estimated end-systolic elastance (Ees) and effective arterial elastance (Ea) using blood pressure and left ventricular (LV) volume obtained from echocardiography. LV efficiency [ventriculoarterial coupling (Ea/Ees) and the stroke work to pressure-volume area ratio (SW/PVA)] was calculated. Measurements were taken before, 1 week after and 1 year after bioprosthetic aortic valve replacement (TAVR, n = 56; SAVR, n = 61) in patients with severe aortic stenosis and preserved ejection fraction. RESULTS Patients with TAVR had a lower aortic valve pressure gradient and larger stroke volume 1 week after the procedure than those with SAVR. Ea was more markedly decreased, and LV efficiency was significantly improved 1 week after TAVR (SW/PVA 68.1% ± 8.4% to 72.0% ± 8.5%, P < 0.001), but LV efficiency was unchanged 1 week after SAVR (SW/PVA 70.1% ± 7.4% to 69.1% ± 8.0%). LV efficiency was improved 1 year after both procedures (SW/PVA 75.5% ± 6.1% in TAVR; 74.7% ± 6.4% in SAVR). CONCLUSIONS TAVR decreases the transvalvular pressure gradient further without deteriorating stroke volume in the early postoperative period, which is accompanied by early improvement in afterload and LV efficiency compared with SAVR. Improvement in LV efficiency at mid-term follow-up is satisfactory after both procedures.
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Affiliation(s)
- Yoshiyuki Yamashita
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Yoshihisa Tanoue
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Hiromichi Sonoda
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Tomoki Ushijima
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Satoshi Kimura
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Yasuhisa Oishi
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Hideki Tatewaki
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Kenichi Hiasa
- Department of Cardiovascular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Takeshi Arita
- Department of Hematology, Oncology and Cardiovascular Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Akira Shiose
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
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18
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Yi T, Fan G, Xing Y, Zhao W, Zhang L, Fan F, Jiang X, Ma Z, Yan J, Li S, Wang Q. Impact of Time Interval Between Glenn and Fontan Procedures on Fontan Operative and Long-Term Follow-up Results. Pediatr Cardiol 2019; 40:705-712. [PMID: 30652193 DOI: 10.1007/s00246-018-2049-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 12/18/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The bidirectional cavopulmonary shunt (BCPS) is an effective palliative procedure which has been widely used to boost outcome of the Fontan procedure. However, there is no standard duration time between these two procedures. Therefore, we investigated whether different time intervals between BCPS and Fontan procedure affects morbidity and mortality of Fontan patients. METHODS Between 2004 and 2016, 210 post-BCPS patients underwent Fontan operation at Fuwai Hospital. The median interval between BCPS and Fontan procedure was 3.7 years (range 0.55-11.86 years) and this was used to divide study cohort into Group 1 (< 3.7 years; n = 124) and Group 2 (> 3.7 years; n = 86). We analyzed these patients retrospectively in terms of their preoperative characteristics and post-operative and follow-up results. RESULTS Weight z-scores for age at BCPS (- 0.73 ± 1.39 vs - 1.17 ± 1.60, p < 0.05) was significantly higher in Group 2. However, saturation at room air before Fontan (76.42 ± 20.01 vs 82.85 ± 9.69, p < 0.001) was significantly higher in Group 1. The morbidity and mortality were similar between two groups. There were twelve hospital deaths (5.7%): eight (8/124, 6.5%) presented in Group 1 and four (4/86, 4.7%) in Group 2. On multi-variable analysis, risk factors for death were prolonged mechanical ventilation [hazard ratio (HR) 1.02, p = 0.004] and single right ventricle (HR 7.17, p = 0.03). After a mean follow-up of 4.95 years (range 0.74-13.62 years), one patient in Group 1 died of heart failure 13 months after Fontan procedure. The overall Fontan failure in Group 1 was similar to that in Group 2 (2.7% vs 2.6%, p = 0.985). The incidence of arrhythmias and re-intervention were not different between the two groups. CONCLUSIONS Fontan procedure could be performed safely in patient who stayed in long duration between Fontan procedure and BCPS without affecting the operative and long-term follow-up results. However, for post-BCPS patients with severe hypoxemia, earlier age at Fontan might be a good choice.
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Affiliation(s)
- Tong Yi
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Guohui Fan
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Yunchao Xing
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Wei Zhao
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Liang Zhang
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Fan Fan
- Center for Infant Heart, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Xianchao Jiang
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Zhiling Ma
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Jun Yan
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Shoujun Li
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China
| | - Qiang Wang
- Department of Congenital Heart Disease, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 North Lishi Road, Xicheng District, Beijing, China.
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Capone CA, Lamour JM, Lorenzo J, Tria B, Ye K, Hsu DT, Mahgerefteh J. Ventricular Arterial Coupling: A Novel Echocardiographic Risk Factor for Disease Progression in Pediatric Dilated Cardiomyopathy. Pediatr Cardiol 2019; 40:330-338. [PMID: 30415380 DOI: 10.1007/s00246-018-2021-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 11/01/2018] [Indexed: 11/25/2022]
Abstract
In adult heart failure (HF) patients, a higher ventricular arterial (VA) coupling ratio measured non-invasively is associated with worse HF prognosis and response to treatment. There are no data regarding the relationship of VA coupling to outcome in pediatric dilated cardiomyopathy (DCM) patients. We investigated the association of VA coupling ratio with worse outcome (mechanical circulatory support, transplant, or death) in 48 children with DCM and 97 age-gender matched controls. Mean age at presentation was 9 ± 7 years; DCM patients had a higher arterial elastance (3.8 ± 1.7 vs 2.7 ± 0.7 respectively p = 0.001), a lower LV elastance (1.1 ± 0.65 vs 4.5 ± 1.4, respectively p = 0.001) and higher VA coupling ratio (5.0 ± 3.9 vs 0.34 ± 0.14, respectively p = 0.001). Outcome events occurred in 27/48 (56%) patients. Patients with an outcome event had a higher NYHA class (p = 0.001), lower LV elastance (0.8 ± 0.47 vs 1.6 ± 0.57, respectively p = 0.001), higher arterial elastance (4.5 ± 1.8 vs 2.9 ± 1.1, respectively p = 0.002), and a higher VA coupling ratio (7.1 ± 3.8 vs 2.2 ± 1.5, respectively p = 0.001) compared to those without. In a multivariate CART analysis, VA coupling was the top and only discriminator of poor outcome. In conclusion, a higher VA coupling ratio is associated with worse outcome in pediatric patients with DCM. VA coupling is promising as a bedside analysis tool that may provide insight into the mechanisms of HF in pediatric DCM and identify potential targets for therapy.
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Affiliation(s)
- Christine A Capone
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, 3415 Bainbridge Avenue, R1, 10467, Bronx, NY, USA.
| | - Jacqueline M Lamour
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, 3415 Bainbridge Avenue, R1, 10467, Bronx, NY, USA
| | - Josemiguel Lorenzo
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, 3415 Bainbridge Avenue, R1, 10467, Bronx, NY, USA
| | - Barbara Tria
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, 3415 Bainbridge Avenue, R1, 10467, Bronx, NY, USA
| | - Kenny Ye
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Daphne T Hsu
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, 3415 Bainbridge Avenue, R1, 10467, Bronx, NY, USA
| | - Joseph Mahgerefteh
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, 3415 Bainbridge Avenue, R1, 10467, Bronx, NY, USA
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Granegger M, Valencia A, Quandt D, Dave H, Kretschmar O, Hübler M, Schweiger M. Approaches to Establish Extracardiac Total Cavopulmonary Connections in Animal Models—A Review. World J Pediatr Congenit Heart Surg 2019; 10:81-89. [DOI: 10.1177/2150135118802788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: Long-term survival of patients with a single ventricle palliated with a Fontan procedure is still limited. No curative treatment options are available. To investigate the pathophysiology and potential treatment options, such as mechanical circulatory support (MCS), appropriate large animal models are required. The aim of this review was to analyze all full-text manuscripts presenting approaches for an extracardiac total cavopulmonary connection (TCPC) animal model to identify the feasibility and limitations in the acute and chronic setting. Methods: A literature search was performed for full-text publications presenting large animal models with extracardiac TCPCs on Pubmed and Embase. Out of 454 reviewed papers, 23 manuscripts fulfilled the inclusion criteria. Surgical procedures were categorized and hemodynamic changes at the transition from the biventricular to the univentricular condition analyzed. Results: Surgical procedures varied especially regarding coronary venous flow handling and anatomic shape of the TCPC. In most studies (n = 14), the main pulmonary artery was clamped and the coronary venous flow redirected by additional surgical interventions. Only in five reports, the caval veins were connected to the right pulmonary artery to create a true TCPC shape, whereas in all others (n = 18), the veins were connected to the main pulmonary artery. An elevated pulmonary vascular resistance was identified as a limiting hemodynamic factor for TCPC completion in healthy animals. Conclusions: A variety of acute TCPC animal models were successfully established with and without MCS, reflecting the most important hemodynamic features of a Fontan circulation; however, chronic animal models were not reported.
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Affiliation(s)
- Marcus Granegger
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Anna Valencia
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Daniel Quandt
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
- Pediatric Cardiology, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Hitendu Dave
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Oliver Kretschmar
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
- Pediatric Cardiology, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Michael Hübler
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Martin Schweiger
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
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21
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Oh J, Song IK, Cho J, Yun TJ, Park CS, Choi JM, Gwak M, Shin WJ. Acute Change in Ventricular Contractility-Load Coupling After Corrective Surgery for Congenital Heart Defect: A Retrospective Cohort Study. Pediatr Cardiol 2019; 40:1618-1626. [PMID: 31482237 PMCID: PMC6848039 DOI: 10.1007/s00246-019-02195-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 08/23/2019] [Indexed: 11/29/2022]
Abstract
Ventricular performance and its loading condition change drastically after surgical correction of congenital heart defect. Pressure-volume loops analysis can provide quantitative information about ventriculo-arterial coupling (VAC) indicating the interaction between ventricular contractility and loading condition. Therefore, we investigated changes in VAC after corrective surgery for ventricular septal defect (VSD)/tetralogy of Fallot (TOF), and implication of ventriculo-arterial decoupling as a prognostic factor of post-operative outcomes. In children with VSD/TOF, pre- and post-operative arterial elastance (Ea), end-systolic ventricular elastance (Ees) and VAC (Ea/Ees) were non-invasively estimated using echocardiographic parameters. Post-operative outcomes included maximum vasoactive-inotropic score, the duration of mechanical ventilation and hospital stay. Preoperatively, patients with VSD had significantly lower Ea and Ees than patients with TOF; however, VAC were preserved in both. In patients with VSD, post-operative Ea increased disproportionately to change in Ees, resulting in increased VAC. Post-operative higher VAC in patients with VSD was independently associated with maximum vasoactive-inotropic score (odds ratio [OR] 63.9; 95% Confidence Interval [CI] 4.0-553.0; P = 0.003), prolonged mechanical ventilation (OR 6.3; 95% CI 1.1-37.8; P = 0.044) and longer hospitalization (OR 17.6; 95% CI 1.6-187.0; P = 0.018). In patients with TOF, Ea and Ees reduced post-operatively; however, VAC remained unchanged and was not associated with post-operative outcomes. Despite of different loading condition, preoperative VAC maintained in both of VSD and TOF. However, particularly in VSD patients, abrupt increase in post-operative loading state induces contractility-load decoupling, which leads to worse post-operative outcomes.
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Affiliation(s)
- Jimi Oh
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - In-Kyung Song
- Department of Anesthesiology and Pain Medicine, Laboratory for Cardiovascular Dynamics, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - Junki Cho
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - Tae-Jin Yun
- Department of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - Chun Soo Park
- Department of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - Jae Moon Choi
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - Mijeung Gwak
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505 Seoul, Republic of Korea
| | - Won-Jung Shin
- Department of Anesthesiology and Pain Medicine, Laboratory for Cardiovascular Dynamics, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505, Seoul, Republic of Korea.
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22
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Left ventricular pumping during the transition-adaptation sequence in preterm infants: impact of the patent ductus arteriosus. Pediatr Res 2018. [PMID: 29538367 DOI: 10.1038/pr.2018.22] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BackgroundPostnatally, the immature left ventricle (LV) is subjected to high systemic afterload. Hypothesizing that LV pumping would change during transition-adaptation, we analyzed the LV in preterm infants (GA≤32+6), clinically stable or with a hemodynamically significant patent ductus arteriosus (hPDA) by applying a pump model.MethodsPumping was characterized by EA (effective arterial elastance, reflecting afterload), EES (end-systolic LV elastance, reflecting contractility), EA/EES coupling ratios, descriptive EA:EES relations, and EA/EES graphs. Data calculated from echocardiography and blood pressure were analyzed by diagnosis (S group: clinically stable, no hPDA, n=122; hPDA group, n=53) and by periods (early transition: days of life 1-3; late transition: 4-7; and adaptation: 8-30).ResultsS group: LV pumping was characterized by an increased EA/EES coupling ratio of 0.65 secondary to low EES in early transition, a tandem rise of both EA and EES in late transition, and an EA/EES coupling ratio of 0.45 secondary to high EES in adaptation; hPDA group: time-trend analyses showed significantly lower EA (P<0.0001) and EES (P=0.006). Therefore, LV pumping was characterized by a lower EA/EES coupling ratio (P=0.088) throughout transition-adaptation.ConclusionsIn stable infants, facing high afterload, the immature LV, enhanced by the physiological PDA, increases its contractility. In hPDA, facing low afterload, the overloaded immature LV exhibits a consistently lower contractility.
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23
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Inefficient Ventriculoarterial Coupling in Fontan Patients: A Cardiac Magnetic Resonance Study. Pediatr Cardiol 2018; 39:763-773. [PMID: 29404642 DOI: 10.1007/s00246-018-1819-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 01/19/2018] [Indexed: 11/27/2022]
Abstract
The ventriculoarterial coupling (VAC) ratio, the ratio of arterial elastance (Ea) to ventricular end-systolic elastance (Ees), reflects cardiovascular efficiency. Little is known about this ratio in patients who have undergone the Fontan procedure. Our aim was to assess the VAC ratio in a cohort of Fontan patients using a cardiac magnetic resonance (CMR) method, and to examine its relation to outcomes. We retrospectively assessed VAC from CMR data on 195 Fontan patients (age 19.6 ± 10.7 years) and 42 controls (age 15.2 ± 2.2 years). The VAC ratio was calculated as Ea/Ees (Ea = mean arterial blood pressure (MBP)/ventricular stroke volume; Ees = MBP/end-systolic volume). Compared with controls, Fontan patients had lower body surface area-adjusted median Ees (1.54 vs. 2.4, p < 0.001) and Ea (1.35 vs. 1.48, p = 0.01), and a higher median VAC ratio (0.88 vs. 0.62, p < 0.001). After a median follow-up of 4 years (range 1-10), 20 patients reached a composite endpoint of death or heart transplant listing. On multivariable modeling, being in the lowest tertile of the VAC ratio was independently associated with the composite endpoint (odds ratio 11.39, p = 0.02), and inclusion of the VAC ratio in the model improved prediction compared to traditional risk factors. In patients without ventricular dilation, the VAC ratio was the only factor predictive of the composite endpoint (p = 0.02). In conclusion, we found evidence for inefficient ventriculoarterial coupling in Fontan patients. The VAC ratio improved prediction of outcomes and was especially useful in patients without ventricular dilation. Further investigation into the clinical significance of ventriculoarterial coupling in this patient population is warranted.
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Kinoshita M, Akiyama K, Itatani K, Yamashita A, Ishii M, Kainuma A, Maeda Y, Miyazaki T, Yamagishi M, Sawa T. Energetic performance analysis of staged palliative surgery in tricuspid atresia using vector flow mapping. Cardiovasc Ultrasound 2017; 15:27. [PMID: 29241451 PMCID: PMC5731082 DOI: 10.1186/s12947-017-0118-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/26/2017] [Indexed: 11/19/2022] Open
Abstract
Background Staged palliative surgery markedly shifts the balance of volume load on a single ventricle and pulmonary vascular bed. Blalock-Taussig shunt necessitates a single ventricle eject blood to both the systemic and pulmonary circulation. On the contrary, bidirectional cavopulmonary shunt release the single ventricle from pulmonary circulation. Case presentation We report a case of tricuspid atresia patient who underwent first palliative surgery and second palliative surgery. Volume loading condition was assessed by energetic parameters (energy loss, kinetic energy) intraoperatively using vector flow mapping. These energetic parameters can simply indicate the volume loading condition. Conclusion Vector flow mapping was useful tool for monitoring volume loading condition in congenital heart disease surgery. Electronic supplementary material The online version of this article (10.1186/s12947-017-0118-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mao Kinoshita
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, 465 Kajii Cho, Hirokoji Agaru, Kawaramachi Street, Kamigyo Ward, Kyoto City, Kyoto Prefecture, 602-8566, Japan
| | - Koichi Akiyama
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, 465 Kajii Cho, Hirokoji Agaru, Kawaramachi Street, Kamigyo Ward, Kyoto City, Kyoto Prefecture, 602-8566, Japan.
| | - Keiichi Itatani
- Department of Cardiovascular Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ayahiro Yamashita
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, 465 Kajii Cho, Hirokoji Agaru, Kawaramachi Street, Kamigyo Ward, Kyoto City, Kyoto Prefecture, 602-8566, Japan
| | - Maki Ishii
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, 465 Kajii Cho, Hirokoji Agaru, Kawaramachi Street, Kamigyo Ward, Kyoto City, Kyoto Prefecture, 602-8566, Japan
| | - Atsushi Kainuma
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, 465 Kajii Cho, Hirokoji Agaru, Kawaramachi Street, Kamigyo Ward, Kyoto City, Kyoto Prefecture, 602-8566, Japan
| | - Yoshinobu Maeda
- Department of Cardiovascular Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takako Miyazaki
- Department of Cardiovascular Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masaaki Yamagishi
- Department of Cardiovascular Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Teiji Sawa
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, 465 Kajii Cho, Hirokoji Agaru, Kawaramachi Street, Kamigyo Ward, Kyoto City, Kyoto Prefecture, 602-8566, Japan
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25
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Di Molfetta A, Iacobelli R, Guccione P, Di Chiara L, Rocchi M, Cobianchi Belisari F, Campanale M, Gagliardi MG, Filippelli S, Ferrari G, Amodeo A. Evolution of Ventricular Energetics in the Different Stages of Palliation of Hypoplastic Left Heart Syndrome: A Retrospective Clinical Study. Pediatr Cardiol 2017; 38:1613-1619. [PMID: 28831530 DOI: 10.1007/s00246-017-1704-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 07/28/2017] [Indexed: 11/27/2022]
Abstract
Hyperplastic left heart syndrome (HLHS) patients are palliated by creating a Fontan-type circulation passing from different surgical stages. The aim of this work is to describe the evolution of ventricular energetics parameters in HLHS patients during the different stages of palliation including the hybrid, the Norwood, the bidirectional Glenn (BDG), and the Fontan procedures. We conducted a retrospective clinical study enrolling all HLHS patients surgically treated with hybrid procedure and/or Norwood and/or BDG and/or Fontan operation from 2011 to 2016 collecting echocardiographic and hemodynamic data. Measured data were used to calculate energetic variables such as ventricular elastances, external and internal work, ventriculo-arterial coupling and cardiac mechanical efficiency. From 2010 to 2016, a total of 29 HLHS patients undergoing cardiac catheterization after hybrid (n = 7) or Norwood (n = 6) or Glenn (n = 8) or Fontan (n = 8) procedure were retrospectively enrolled. Ventricular volumes were significantly higher in the Norwood circulation than in the hybrid circulation (p = 0.03) with a progressive decrement from the first stage to the Fontan completion. Ventricular elastances were lower in the Norwood circulation than in the hybrid circulation and progressively increased passing from the first stage to the Fontan completion. The arterial elastance and Rtot increased in the Fontan circulation. The ventricular work progressively increased. Finally, the ventricular efficiency improves passing from the first to the last stage of palliation. The use of ventricular energetic parameters could lead to a more complete evaluation of such complex patients to better understand their adaptation to different pathophysiological conditions.
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Affiliation(s)
- A Di Molfetta
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy.
| | - R Iacobelli
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
| | - P Guccione
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
| | - L Di Chiara
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
| | - M Rocchi
- Faculty of Biomedical Engineer, Rome University Campus Bio-medico, Via Álvaro del Portillo, 21, Rome, RM, Italy
| | - F Cobianchi Belisari
- Department of Cardiology, Catholic University of Rome, Largo A. Gemelli, 1, 20123, Milan, MI, Italy
| | - M Campanale
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
| | - M G Gagliardi
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
| | - S Filippelli
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
| | - G Ferrari
- Nalecz Institute of Technology, IBBE-PAS, Warsaw, Poland
| | - A Amodeo
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165, Rome, RM, Italy
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26
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Shin WJ, Hwang GS. Reply to: "Pressure volume curves in cirrhosis: More than meets the eye". J Hepatol 2017; 67:657-658. [PMID: 28499556 DOI: 10.1016/j.jhep.2017.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/01/2017] [Indexed: 12/04/2022]
Affiliation(s)
- Won-Jung Shin
- Department of Anesthesiology and Pain Medicine, Laboratory for Cardiovascular Dynamics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Gyu-Sam Hwang
- Department of Anesthesiology and Pain Medicine, Laboratory for Cardiovascular Dynamics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
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27
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Puelz C, Acosta S, Rivière B, Penny DJ, Brady KM, Rusin CG. A computational study of the Fontan circulation with fenestration or hepatic vein exclusion. Comput Biol Med 2017; 89:405-418. [PMID: 28881280 DOI: 10.1016/j.compbiomed.2017.08.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/02/2017] [Accepted: 08/22/2017] [Indexed: 12/14/2022]
Abstract
Fontan patients may undergo additional surgical modifications to mitigate complications like protein-losing enteropathy, liver cirrhosis, and other issues in their splanchnic circulation. Recent case reports show promise for several types of modifications, but the subtle effects of these surgeries on the circulation are not well understood. In this paper, we employ mathematical modeling of blood flow to systematically quantify the impact of these surgical changes on extracardiac Fontan hemodynamics. We investigate two modifications: (1) the fenestrated Fontan and (2) the Fontan with hepatic vein exclusion. Closed-loop hemodynamic models are used, which consist of one-dimensional networks for the major vessels and zero-dimensional models for the heart and organ beds. Numerical results suggest the hepatic vein exclusion has the greatest overall impact on the hemodynamics, followed by the largest sized fenestration. In particular, the hepatic vein exclusion drastically lowers portal venous pressure while the fenestration decreases pulmonary artery pressure. Both modifications increase flow to the intestines, a finding consistent with their utility in clinical practice for combating complications in the splanchnic circulation.
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Affiliation(s)
- Charles Puelz
- Department of Computational and Applied Mathematics, Rice University, Houston, TX, USA.
| | - Sebastián Acosta
- Department of Pediatrics-Cardiology, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Béatrice Rivière
- Department of Computational and Applied Mathematics, Rice University, Houston, TX, USA
| | - Daniel J Penny
- Department of Pediatrics-Cardiology, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Ken M Brady
- Department of Anesthesiology, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Craig G Rusin
- Department of Pediatrics-Cardiology, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
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28
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Gray MA, Graham EM, Atz AM, Bradley SM, Kavarana MN, Chowdhury SM. Preoperative echocardiographic measures of left ventricular mechanics are associated with postoperative vasoactive support in preterm infants undergoing patent ductus arteriosus ligation. J Thorac Cardiovasc Surg 2017; 154:2054-2059.e1. [PMID: 28743382 DOI: 10.1016/j.jtcvs.2017.06.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 06/13/2017] [Accepted: 06/27/2017] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Preoperative risk factors associated with poor outcomes after patent ductus arteriosus ligation in preterm infants have not been well defined. The aim of this study was to determine the association between preoperative echocardiographic measures of left ventricular mechanics and postoperative clinical outcomes after patent ductus arteriosus ligation. METHODS Preterm infants less than 90 days of age with no other significant congenital anomalies who underwent patent ductus arteriosus ligation between 2007 and 2015 were considered for retrospective analysis. The primary outcome was peak postoperative vasoactive inotropic score. Conventional echocardiographic measures of ventricular size, function, and patent ductus arteriosus size were performed. Echocardiographic single-beat, pressure-volume loop analysis estimates of contractility (end-systolic elastance) and afterload (arterial elastance) were calculated. Ventriculoarterial coupling was assessed using the arterial elastance/end-systolic elastance ratio. Multivariable linear regression was performed using clinical and echocardiographic data. RESULTS Echocardiograms from 101 patients (42.5% male) were analyzed. We found a statistically significant association between vasoactive inotropic score and both end-systolic elastance and arterial elastance. No patient with arterial elastance/end-systolic elastance greater than 0.78 (n = 32) had a vasoactive inotropic score 20 or greater. Analysis of our secondary outcomes found associations between preoperative end-systolic elastance and postoperative urine output less than 1 mL/kg/h at 24 hours, creatinine change greater than 0.5 mg/dL, and time to first extubation. CONCLUSIONS End-systolic elastance and arterial elastance were the only predictors of postoperative vasoactive inotropic score after patent ductus arteriosus ligation in preterm infants. Those neonates with increased contractility and low afterload were at highest risk for elevated inotropic support. These findings suggest a role for echocardiographic end-systolic elastance and arterial elastance in the preoperative assessment of preterm infants undergoing patent ductus arteriosus ligation.
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Affiliation(s)
- Margaret A Gray
- Division of Cardiology, Department of Pediatrics, Medical University of South Carolina, Charleston, SC.
| | - Eric M Graham
- Division of Cardiology, Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Andrew M Atz
- Division of Cardiology, Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Scott M Bradley
- Division of Pediatric Cardiothoracic Surgery, Department of Surgery, Medical University of South Carolina, Charleston, SC
| | - Minoo N Kavarana
- Division of Pediatric Cardiothoracic Surgery, Department of Surgery, Medical University of South Carolina, Charleston, SC
| | - Shahryar M Chowdhury
- Division of Cardiology, Department of Pediatrics, Medical University of South Carolina, Charleston, SC
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29
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Sasikumar D, Sasidharan B, Dharan BS, Gopalakrishnan A, Krishnamoorthy KM, Sivasankaran S. Quantification of ventricular unloading by 3D echocardiography in single ventricle of left ventricular morphology following superior cavo-pulmonary anastomosis and Fontan completion - a feasibility study. Ann Pediatr Cardiol 2017; 10:224-229. [PMID: 28928606 PMCID: PMC5594931 DOI: 10.4103/apc.apc_12_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Three-dimensional echocardiography. (3DE) is comparable to cardiac magnetic resonance imaging for estimating ventricular volume in congenital heart diseases. However, there are limited data on estimation of ventricular volumes by 3DE in univentricular heart and change in ventricular volumes after surgical creation of cavopulmonary connection. We sought to quantify the unloading of the single ventricle of left ventricular. (LV) morphology by 3DE after superior cavopulmonary anastomosis. (SCPA) or Fontan operation over a period of 3 months and thereby derive a preliminary 3DE data set on this patient subset. PATIENTS AND METHODS Eighteen patients with functional single ventricle of LV morphology, who underwent SCPA or completion of Fontan circulation, were included in the study. Volume of the ventricle was estimated by 3DE before surgery and after surgery. (in the early postoperative phase and 3 months after surgery), and indexed end-diastolic volume. (EDV), end-systolic volume. (ESV), and ejection fraction. (EF) were derived. RESULTS Twelve patients underwent SCPA and six patients underwent staged completion of Fontan circulation. Before surgery, EDV was similar in both groups. There was a significant fall in EDV immediately after SCPA (from 48.3 ± 14.9 ml/m2 to 39.5 ± 12.3 ml/m2). However, EDV increased at 3 months' follow-up to 41.3 ± 10.5 ml/m2. There was no significant fall in EDV immediately after Fontan operation (47.2 ± 10.1 ml/m2-46.6 ± 14.2 ml/m2), but EDV continued to fall at 3 months of follow-up (44.7 ± 10. ml/m2). There was no significant change in ESV in either group, but EF fell significantly after SCPA. CONCLUSIONS We provide preliminary information on 3DE volume data of single ventricle of LV morphology and the pattern of unloading after SCPA and Fontan operation. Immediate significant volume unloading occurred after SCPA which tended to catch-up after 3 months, whereas continued fall in ventricular volume with time was noted after Fontan.
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Affiliation(s)
- Deepa Sasikumar
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Bijulal Sasidharan
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Baiju S Dharan
- Department of Cardiothoracic Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Arun Gopalakrishnan
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Kavasseri M Krishnamoorthy
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Sivasubramanian Sivasankaran
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
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30
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Chowdhury SM, Butts RJ, Taylor CL, Bandisode VM, Chessa KS, Hlavacek AM, Shirali GS, Baker GH. Validation of Noninvasive Measures of Left Ventricular Mechanics in Children: A Simultaneous Echocardiographic and Conductance Catheterization Study. J Am Soc Echocardiogr 2016; 29:640-7. [PMID: 27025669 DOI: 10.1016/j.echo.2016.02.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND The accuracy of echocardiography in evaluating left ventricular contractility has not been validated in children. The objective of this study was to compare echocardiographic measures of contractility with those derived from pressure-volume loop (PVL) analysis in children. METHODS Patients with relatively normal loading conditions undergoing routine left heart catheterization were prospectively enrolled. PVLs were obtained via conductance catheters. The gold-standard measure of contractility, end-systolic elastance (Ees), was obtained via balloon occlusion of one or both vena cavae. Echocardiograms were performed immediately after PVL analysis under the same anesthetic conditions. Single-beat estimations of echocardiographic Ees were calculated using four different methods. These estimates were calculated using a combination of noninvasive blood pressure readings, ventricular volumes derived from three-dimensional echocardiography, and Doppler time intervals. RESULTS Of 24 patients, 18 patients were heart transplant recipients, and six patients had small patent ductus arteriosus or small coronary fistulae. The mean age was 9.1 ± 5.6 years. The average invasive Ees was 3.04 ± 1.65 mm Hg/mL. Invasive Ees correlated best with echocardiographic Ees by the method of Tanoue (r = 0.85, P < .01), with a mean difference of -0.07 mm Hg/mL (95% limits of agreement, -2.0 to 1.4 mm Hg/mL). CONCLUSIONS Echocardiographic estimates of Ees correlate well with gold-standard measures obtained via conductance catheters in children with relatively normal loading conditions. The use of these noninvasive measures in accurately assessing left ventricular contractility appears promising and merits further study in children.
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Affiliation(s)
- Shahryar M Chowdhury
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina.
| | - Ryan J Butts
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Carolyn L Taylor
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Varsha M Bandisode
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Karen S Chessa
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Anthony M Hlavacek
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Girish S Shirali
- The Ward Family Heart Center, Children's Mercy Hospital, Kansas City, Missouri
| | - G Hamilton Baker
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
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Fontan Operation: Indications, Short and Long Term Outcomes. Indian J Pediatr 2015; 82:1147-56. [PMID: 26088549 DOI: 10.1007/s12098-015-1803-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 05/25/2015] [Indexed: 10/23/2022]
Abstract
Fontan operation, since its original description, has undergone a number of modifications so that it is now a staged, total cavo-pulmonary connection with fenestration. Stage I is palliation, depending upon the pathophysiology of the defect complex in early life, Stage II is bidirectional Glenn at about the age of 6 mo and Stage III is transfer of inferior vena caval blood to the pulmonary circuit along with fenestration between 2 to 4 y. Any patient that has only one functioning ventricle is a candidate for Fontan surgery. The morbidity and mortality have remarkably improved since the institution of staged, total cavo-pulmonary connection with fenestration. Complications during follow up continue to occur, though diminished with the newer modifications, and should be promptly addressed.
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Imasaka KI, Tayama E, Tomita Y. Left ventricular performance early after repair for posterior mitral leaflet prolapse: Chordal replacement versus leaflet resection. J Thorac Cardiovasc Surg 2015; 150:538-45. [DOI: 10.1016/j.jtcvs.2015.06.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/19/2015] [Accepted: 06/06/2015] [Indexed: 10/23/2022]
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Similar improvement of left ventricular performance after valve replacement for aortic stenosis with small aortic annuli among three different implantation techniques. Indian J Thorac Cardiovasc Surg 2014. [DOI: 10.1007/s12055-014-0311-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Butts RJ, Chowdhury SM, Buckley J, Hlavacek AM, Hsia TY, Khambadkone S, Baker GH. Comparison of echocardiographic and pressure-volume loop indices of systolic function in patients with single ventricle physiology: a preliminary report. CONGENIT HEART DIS 2014; 10:E17-24. [PMID: 24869911 DOI: 10.1111/chd.12191] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/22/2014] [Indexed: 01/19/2023]
Abstract
BACKGROUND Differences in ventricular geometry and physiology of patients with single ventricle anatomy complicate the application of traditional, noninvasive measurements of systolic function. We compared noninvasive measures of ventricular systolic function in single ventricle patients with invasive measures to evaluate their validity in this population. METHODS A secondary analysis of patients with single ventricle physiology enrolled in the multi-institutional research project, "multi-scale modeling of single ventricle hearts," was performed. Pressure-volume loops (PVLs) were recorded using microconductance catheters. Transthoracic echocardiogram and cardiac magnetic resonance imaging were performed on the same day. PVL indices of systolic function including end-systolic elastance (Ees), maximal rate of pressure increase (dP/dTmax), and stroke work indexed to end-diastolic volume (SW/EDV) were compared with noninvasive measures, including echocardiographic myocardial performance index (MPI), rate of pressure rise (AV valve dP/dT), isovolumic acceleration, longitudinal shortening fraction (longSF), and fractional area change (FAC). RESULTS Fifteen patients had PVLs available for analysis. Eleven had a dominant right ventricle, three were status poststage 1 repair, five had superior cavopulmonary anastomosis, and seven had a total cavopulmonary anastomosis. FAC correlated with Ees (r = 0.69, P < .01), SW/EDV (r = 0.64, P = .01), and dP/dTmax (r = 0.59, P = .03). LongSF correlated with dP/dTmax (r = 0.61, P = .02) MPI, AV valve dP/dT, and isovolumic acceleration did not correlate with pressure-volume loop indices of systolic function. CONCLUSIONS Obtaining PVLs via microconductance catheters can reliably be performed in the single ventricle population and serve as a method to validate echocardiographic indices in this high-risk population. Of the echocardiographic variables, FAC showed the best correlation with PVL indices. Future studies controlling for stage of palliation should be performed to further validate echocardiographic measures of systolic function in this patient population.
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Affiliation(s)
- Ryan J Butts
- Department of Pediatrics, Division of Cardiology, Medical University of South Carolina, Charleston, SC, USA
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Cardiac energetics analysis after aortic valve replacement with 16-mm ATS mechanical valve. J Artif Organs 2014; 17:250-7. [PMID: 24859744 DOI: 10.1007/s10047-014-0769-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 04/30/2014] [Indexed: 10/25/2022]
Abstract
The 16-mm ATS mechanical valve is one of the smallest prosthetic valves used for aortic valve replacement (AVR) in patients with a very small aortic annulus, and its clinical outcomes are reportedly satisfactory. Here, we analyzed the left ventricular (LV) performance after AVR with the 16-mm ATS mechanical valve, based on the concept of cardiac energetics analysis. Eleven patients who underwent AVR with the 16-mm ATS mechanical valve were enrolled in this study. All underwent echocardiographic examination at three time points: before AVR, approximately 1 month after AVR, and approximately 1 year after AVR. LV contractility (end-systolic elastance [Ees]), afterload (effective arterial elastance [Ea]), and efficiency (ventriculoarterial coupling [Ea/Ees] and the stroke work to pressure-volume area ratio [SW/PVA]) were noninvasively measured by echocardiographic data and blood pressure measurement. Ees transiently decreased after AVR and then recovered to the pre-AVR level at the one-year follow-up. Ea significantly decreased in a stepwise manner. Consequently, Ea/Ees and SW/PVA were also significantly improved at the one-year follow-up compared with those before AVR. The midterm LV performance after AVR with the 16-mm ATS mechanical valve was satisfactory. AVR with the 16-mm ATS mechanical valve is validated as an effective treatment for patients with a very small aortic annulus. The cardiac energetics variables, coupling with the conventional hemodynamic variables, can contribute to a better understanding of the patients' clinical conditions, and those may serve as promising indices of the cardiac function.
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Contractility-afterload mismatch in patients with protein-losing enteropathy after the Fontan operation. Pediatr Cardiol 2014; 35:1225-31. [PMID: 24827079 PMCID: PMC4164859 DOI: 10.1007/s00246-014-0920-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 04/25/2014] [Indexed: 11/23/2022]
Abstract
This study aimed to clarify the relationship between onset of protein-losing enteropathy (PLE) and Fontan circulation, with special reference to the development of contractility-afterload mismatch. The PLE group comprised 9 patients who experienced PLE after undergoing the Fontan operation, and the control group consisted of 32 patients had did not experienced PLE more than 10 years after the Fontan operation. The study compared the pre- and postoperative values of arterial elastance (Ea), end-systolic elastance (Ees), and contractility-afterload mismatch (Ea/Ees). Furthermore, the variations in the values were examined during the preoperative, postoperative, and midterm postoperative periods in seven PLE patients who underwent cardiac catheterization at the onset of PLE and during the pre- and postintervention periods in three PLE patients who underwent surgical intervention to improve the Fontan circulation after the onset of PLE. Comparison of the values obtained before and after Fontan operations showed that the Ea values increased significantly in the PLE group. However, the pre- and postoperative Ees values did not differ in the two groups. During the postoperative period, Ea/Ees increased significantly, and the Ea and Ea/Ees values increased continuously until the onset of PLE in the PLE group. In the patients who underwent surgical intervention to improve the Fontan circulation after the onset of PLE, the Ea/Ees decreased significantly, and the serum albumin levels improved after the intervention. Contractility-afterload mismatch, mainly caused by the increase in the afterload of the systemic ventricle, may have an important role in the development of PLE after the Fontan operation.
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Hemodynamics and arteriovenous malformations in cavopulmonary anastomosis: The case for residual antegrade pulsatile flow. J Thorac Cardiovasc Surg 2013; 146:1359-65. [DOI: 10.1016/j.jtcvs.2013.02.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 01/22/2013] [Accepted: 02/13/2013] [Indexed: 11/18/2022]
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Transient hemodynamic changes upon changing a BCPA into a TCPC in staged Fontan operation: a computational model study. ScientificWorldJournal 2013; 2013:486815. [PMID: 24319371 PMCID: PMC3844169 DOI: 10.1155/2013/486815] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 09/19/2013] [Indexed: 11/17/2022] Open
Abstract
The clinical benefits of the Fontan operation in treating single-ventricle defects have been well documented. However, perioperative mortality or morbidity remains a critical problem. The purpose of the present study was to identify the cardiovascular factors that dominate the transient hemodynamic changes upon the change of a bidirectional cavopulmonary (Glenn) anastomosis (BCPA) into a total cavopulmonary connection (TCPC). For this purpose, two computational models were constructed to represent, respectively, a single-ventricle circulation with a BCPA and that with a TCPC. A series of model-based simulations were carried out to quantify the perioperative hemodynamic changes under various cardiovascular conditions. Obtained results indicated that the presence of a low pulmonary vascular resistance and/or a low lower-body vascular resistance is beneficial to the increase in transpulmonary flow upon the BCPA to TCPC change. Moreover, it was found that ventricular diastolic dysfunction and mitral valve regurgitation, despite being well-known risk factors for poor postoperative outcomes, do not cause a considerable perioperative reduction in transpulmonary flow. The findings may help physicians to assess the perioperative risk of the TCPC surgery based on preoperative measurement of cardiovascular function.
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Abstract
OBJECTIVE The specialty of pediatric cardiac critical care has undergone rapid scientific and clinical growth in the last 25 years. The Board of Directors of the Pediatric Cardiac Intensive Care Society assembled an updated list of sentinel references focused on the critical care of children with congenital and acquired heart disease. We encouraged board members to select articles that have influenced and informed their current practice or helped to establish the standard of care. The objective of this article is to provide clinicians with a compilation and brief summary of these updated 100 useful references. DATA SOURCES The list of 'One Hundred Useful References for Pediatric Cardiac Intensive Care' (2004) and relevant literature to the practice of cardiac intensive care. DATA SELECTION A subset of Pediatric Cardiac Intensive Care Society board members compiled the initial list of useful references in 2004, which served as the basis of the new updated list. Suggestions for relevant articles were submitted by the Pediatric Cardiac Intensive Care Society board members and selected pediatric cardiac intensivists with an interest in this project following the Society's meeting in 2010. Articles were considered for inclusion if they were named in the original list from 2004 or were suggested by Pediatric Cardiac Intensive Care Society board members and published before December 31, 2011. DATA EXTRACTION Following submission of the complete list by the Pediatric Cardiac Intensive Care Society board and contributing Society members, articles were complied by the two co-first authors (D.A., D.K.). The authors also performed Medline searches to ensure comprehensive inclusion of all relevant articles. The final list was then submitted to the Pediatric Cardiac Intensive Care Society board members, who ranked each publication. DATA SYNTHESIS Rankings were compiled and the top 100 articles with the highest scores were selected for inclusion in this publication. The two co-first authors (D.A., D.K.) reviewed all existing summaries and developed summaries of the newly submitted articles. CONCLUSIONS An updated compilation of 100 useful references for the critical care of children with congenital and acquired heart disease has been compiled and summarized here. Clinicians and trainees may wish to use this document as a reference for education in this complex and challenging subspecialty.
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Tanoue Y, Oishi Y, Sonoda H, Nishida T, Nakashima A, Tominaga R. Left ventricular performance after aortic valve replacement in patients with low ejection fraction. J Artif Organs 2013; 16:443-50. [PMID: 24036623 DOI: 10.1007/s10047-013-0730-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 08/27/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Yoshihisa Tanoue
- Department of Cardiovascular Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan,
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Sun Q, Liu J, Qian Y, Zhang H, Wang Q, Sun Y, Hong H, Liu J. Computational haemodynamic analysis of patient-specific virtual operations for total cavopulmonary connection with dual superior venae cavae. Eur J Cardiothorac Surg 2013; 45:564-9. [DOI: 10.1093/ejcts/ezt394] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Naito Y, Hiramatsu T, Kurosawa H, Agematsu K, Sasoh M, Nakanishi T, Imai Y, Yamazaki K. Long-Term Results of Modified Fontan Operation for Single-Ventricle Patients Associated With Atrioventricular Valve Regurgitation. Ann Thorac Surg 2013; 96:211-8. [DOI: 10.1016/j.athoracsur.2013.02.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 01/29/2013] [Accepted: 02/06/2013] [Indexed: 11/30/2022]
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Nagata H, Ihara K, Yamamura K, Tanoue Y, Shiokawa Y, Tominaga R, Hara T. Left ventricular efficiency after ligation of patent ductus arteriosus for premature infants. J Thorac Cardiovasc Surg 2013; 146:1353-8. [PMID: 23473013 DOI: 10.1016/j.jtcvs.2013.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 01/22/2013] [Accepted: 02/12/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVE The purpose of this study was to evaluate the hemodynamic changes in left ventricular function before and after patent ductus arteriosus ligation in premature infants with regard to the energetic efficiency of left ventricular pumping. METHODS Thirty-five premature infants who underwent patent ductus arteriosus ligation were enrolled in this study. Left ventricular efficiency was evaluated at 4 points: within 24 hours before patent ductus arteriosus ligation, within 24 hours after patent ductus arteriosus ligation, between postoperative days 2 and 4, and on postoperative day 7. The indices of contractility (end-systolic elastance) and afterload (effective arterial elastance) were approximated on the basis of the systemic blood pressure and systolic or diastolic left ventricular volume. The ratio of stroke work and pressure-volume area, representing the ventricular efficiency, was estimated using the following theoretic formula: the ratio of stroke work and pressure-volume area = 1/(1 + 0.5 ventriculoarterial coupling). RESULTS Left ventricular efficiency was transiently deteriorated within 24 hours after patent ductus arteriosus ligation because of the marked increase of the afterload and the slight increase of contraction, and then recovered to preoperation levels by 2 to 4 days after patent ductus arteriosus ligation. CONCLUSIONS Analysis of indices representing the afterload, contractility, and energetic efficiency of the left ventricle may provide practical information for the management of premature infants during the postoperative period after patent ductus arteriosus ligation.
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Affiliation(s)
- Hazumu Nagata
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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Herberg U, Gatzweiler E, Breuer T, Breuer J. Ventricular pressure–volume loops obtained by 3D real-time echocardiography and mini pressure wire—a feasibility study. Clin Res Cardiol 2013; 102:427-38. [DOI: 10.1007/s00392-013-0548-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 01/28/2013] [Indexed: 01/01/2023]
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Shabanian R, Shahbaznejad L, Razaghian A, Kiani A, Rahimzadeh M, Seifirad S, Kocharian A, Gilani JS, Navabi MA. Sildenafil and ventriculo-arterial coupling in Fontan-palliated patients: a noninvasive echocardiographic assessment. Pediatr Cardiol 2013; 34:129-34. [PMID: 22864675 DOI: 10.1007/s00246-012-0400-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 05/17/2012] [Indexed: 11/29/2022]
Abstract
The fundamental role of pulmonary vascular resistance in the Fontan circulation is obvious. Medications decreasing this resistance may have an impact on the fate of this population. Hence, we assessed noninvasively the effect of oral sildenafil on the ventriculo-arterial coupling in patients with Fontan circulation. In a single-center, prospective case series study, 23 patients with fenestrated extracardiac total cavopulmonary connection age 12-31 years were enrolled in this study. Clinical characteristics and echocardiographic examination were performed before and after a 1 week course of sildenafil at 0.5 mg/kg every 8 h. Sildenafil had no effect on heart rate and blood pressure. However, oxygen saturation was significantly increased with sildenafil (87.6 ± 4.3 vs. 90.1 ± 3.6; P < 0.0001). The calculated noninvasive ventricular end-systolic elastance (Ees) was greater after sildenafil compared with the pre-sildenafil values (1.59 ± 0.17 vs. 1.72 ± 0.27 mm Hg/ml; P = 0.001). Moreover, significant decreases in arterial elastance (Ea) (1.62 ± 0.53 vs. 1.36 ± 0.43 mm Hg/ml; P < 0.0001), ventricular end-diastolic elastance (Eed) (0.05 ± 0.021 vs. 0.04 ± 0.013; P = 0.002), and, finally, ventriculo-arterial coupling index (0.99 ± 0.26 vs. 0.76 ± 0.15; P < 0.0001) were found after sildenafil administration. The intolerable side effects that led to stopping the sildenafil occurred only in one (4 %) patient. Sildenafil has increased ventricular systolic elastance and improved ventriculo-arterial coupling in patients palliated with Fontan circulation. Short-term sildenafil was well tolerated in most of the patients with only minor side effects.
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Affiliation(s)
- Reza Shabanian
- Department of Pediatric Cardiology, Children's Medical Center, Tehran University of Medical Sciences, 14194 Tehran, Iran.
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Imasaka KI, Tomita Y, Tanoue Y, Tominaga R, Tayama E, Onitsuka H, Ueda T. Early mitral valve surgery for chronic severe mitral regurgitation optimizes left ventricular performance and left ventricular mass regression. J Thorac Cardiovasc Surg 2012; 146:61-6. [PMID: 22717277 DOI: 10.1016/j.jtcvs.2012.05.056] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 04/09/2012] [Accepted: 05/16/2012] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The optimal timing of mitral valve surgery for severe mitral regurgitation is controversial. We aimed to evaluate the changes in left ventricular performance using ventricular energetics and left ventricular mass regression after the surgery to determine the appropriate surgical timing in asymptomatic patients with severe mitral regurgitation. METHODS Fifty consecutive asymptomatic or minimally symptomatic patients who electively underwent the surgery for severe mitral regurgitation were studied retrospectively. Contractility (end-systolic elastance), afterload (effective arterial elastance), and efficiency (ventriculoarterial coupling and ratio of stroke work to pressure-volume area), and left ventricular mass index were measured echocardiographically before and 1 month after surgery. Two-way repeated-measures analysis of variance was used to compare the parameters between patients with (n = 17) and without (n = 33) left ventricular dysfunction (ie, ejection fraction ≤60% and/or end-systolic dimension ≥40 mm). RESULTS Contractility did not change significantly (P = .94) but the afterload increased significantly (P < .0001) in both groups. Consequently, the efficiency deteriorated significantly (ventriculoarterial coupling, P = .0004; ratio of stroke work to pressure-volume area, P < .0001). Furthermore, the left ventricular mass index improved remarkably in both groups (P < .0001). Alternatively, the patients with normal left ventricular function had greater contractility (P < .0001), less worsened efficiency (P < .0001 and P < .0001, respectively), and a better left ventricular mass index (P = .0002) after surgery. CONCLUSIONS Early surgery for severe mitral regurgitation preserves left ventricular performance and improves left ventricular mass regression in asymptomatic patients with normal ventricular function.
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Affiliation(s)
- Ken-ichi Imasaka
- Department of Cardiovascular Surgery, Clinical Research Institute, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
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Schlangen J, Fischer G, Steendijk P, Petko C, Scheewe J, Hart C, Hansen JH, Ahrend F, Rickers C, Kramer HH, Uebing A. Does left ventricular size impact on intrinsic right ventricular function in hypoplastic left heart syndrome? Int J Cardiol 2012; 167:1305-10. [PMID: 22534043 DOI: 10.1016/j.ijcard.2012.03.183] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 03/02/2012] [Accepted: 03/31/2012] [Indexed: 11/18/2022]
Abstract
BACKGROUND The size of the remnant left ventricle (LV) may influence right ventricular function and thus long-term outcome in palliated hypoplastic left heart syndrome (HLHS). We therefore sought to assess the impact of the size of the hypoplastic LV on intrinsic RV function in HLHS patients after Fontan surgery. METHODS Fifty-seven HLHS patients were studied 2.5 (range: 0.8-12.6) years after Fontan-type palliation with the pressure-volume conductance system. The patient cohort was divided into two groups according to the median LV area index (group 1: LV area index ≤ 1.33 cm(2)/m(2), n=29; group 2: LV area index>1.33 cm(2)/m(2), n=28). RESULTS The slopes of the end systolic elastance (Ees) and the preload recruitable stroke work relation (Mw) were not different between group 1 and 2 (Ees: 2.70 ± 1.92 vs. 3.68 ± 2.68 mmHg/ml; Mw: 52.75 ± 14.98 vs. 51.09 ± 16.63 mmHg x ml; P=NS for all). Furthermore, the systolic responses to dobutamine were not statistically different between groups. However, the slope of the end diastolic stiffness (Eed) was higher in group 2 and catecholaminergic stimulation resulted in a decrease in Eed in group 2 (group 1: 0.40 ± 0.26 vs. 0.52 ± 0.45; group 2: 0.68 ± 0.44 vs. 0.47 ± 0.38 mmHg/ml, P<0.01). Furthermore Eed was lowest in patients with mitral atresia/aortic atresia, the anatomic subgroup with the smallest LV remnant. CONCLUSIONS Intrinsic systolic RV function is not affected by the size of the hypoplastic LV in survivors of surgical palliation of HLHS. Diastolic stiffness, however, was higher in patients with a larger LV remnant.
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Affiliation(s)
- Jana Schlangen
- Department of Congenital Heart Disease and Paediatric Cardiology, University Hospital of Schleswig-Holstein, Campus Kiel, Arnold-Heller-Str 3, Haus 9, 24105 Kiel, Germany.
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Iwai S, Kawata H, Ozawa H, Yamauchi S, Kishimoto H. Use of the Damus-Kaye-Stansel procedure prevents increased ventricular strain in Fontan candidates. Eur J Cardiothorac Surg 2012; 43:150-4. [PMID: 22518038 DOI: 10.1093/ejcts/ezs142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES In Fontan candidates, we have recently been aggressively performing the Damus-Kaye-Stansel procedure (DKS) to prevent increased afterload on the systemic ventricle. The present study investigated the efficacy of the DKS procedure in terms of the ventricular function following a Fontan operation. METHODS Patients undergoing a Fontan operation were divided into three groups: DKS performed at the time of the bidirectional Glenn or Fontan operation (DKS group, n = 25); DKS not performed at any stage due to mild pulmonary stenosis (PS) (PS group, n = 23) and DKS not performed due to pulmonary atresia (PA) or severe PS (PA group, n = 24). Ventricular function, afterload on the systemic ventricle and atrioventricular valve regurgitation were compared between groups. RESULTS Cardiac catheterization before a Glenn or Fontan operation and at 1-year following the Fontan revealed significantly decreased ventricular end-diastolic pressure in the DKS group. The ventricular ejection fraction was significantly deteriorated in the PS group. Effective arterial elastance, as an index of total ventricular afterload, was increased after a Fontan in all groups, with a substantial increase in the PS group. As an index of ventricular mechanical efficiency, ventriculoarterial coupling was significantly increased only in the PS group. Cardiac ultrasonography revealed atrioventricular valve regurgitation above grade 3 persisting in many patients from the PS group. Semilunar valve function after DKS operation did not progress to moderate or worse in any patients. CONCLUSIONS The proactive performance of the DKS procedure prevents increased ventricular afterload, avoiding deterioration of cardiac function and contributing to improved long-term results following a Fontan operation.
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Affiliation(s)
- Shigemitsu Iwai
- Department of Cardiovascular Surgery, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan.
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Single stage versus two stage repair for univentricular heart—our experience. Indian J Thorac Cardiovasc Surg 2011. [DOI: 10.1007/s12055-011-0096-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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