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Yu JJ, Grosse-Wortmann L, Slorach C, Mertens L, Dragulescu A, Friedberg MK. Diastolic myocardial mechanics and their relation to ventricular filling pressures and postoperative course in functionally single ventricles. J Appl Physiol (1985) 2023; 135:621-630. [PMID: 37471215 DOI: 10.1152/japplphysiol.00295.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/28/2023] [Accepted: 07/05/2023] [Indexed: 07/22/2023] Open
Abstract
Diastolic dysfunction affects clinical outcomes in patients with a functionally single ventricle (FSV). The objective of this work is to study the association of ventricular mechanics and interventricular dependence on diastolic parameters and early post-Fontan outcomes. Sixty-one patients with FSV underwent echocardiography, cardiac catheterization, and magnetic resonance imaging on the same day before or after the Fontan procedure. Echocardiographic diastolic parameters, ventricular mass, and incoordinate wall motion, defined by the number of dyskinetic segments or by the lateral wall delay, were determined and studied for relationships with invasively measured hemodynamics and early postoperative Fontan course. In subjects with a sizable secondary ventricle, incoordinate motion was additionally analyzed at the left- and right-sided ventricular free walls. Resting ventricular end-diastolic pressure (VEDP) was ≤10 mmHg in most subjects. Individual echocardiographic parameters of the diastolic flow and tissue velocities did not correlate with VEDP, other hemodynamics, or post-Fontan clinical course. Incoordinate wall motion in the dominant and in the sizeable secondary ventricle, defined by the lateral wall delay or by the number of dyskinetic segments, was the only echo parameter that correlated, albeit weakly, with VEDP (r = 0.247, P = 0.040), oxygen saturation (r = -0.417, P = 0.001), pulmonary vascular resistance and flow (Qp) (r = -0.303, P = 0.011), Fontan fenestration flow (r = 0.512, P = 0.009), and duration of endotracheal intubation (r = 0.292, P = 0.022). When the nondominant (secondary) ventricle was accounted for in the analysis of incoordinate wall motion, these associations strengthened. The degree of incoordinate ventricular wall motion in diastole was associated with VEDP and postoperative Fontan course in FSV. Analysis of incoordinate wall motion of the dominant and sizeable secondary ventricle may be warranted and should be included in the assessment of the FSV after the Fontan procedure.NEW & NOTEWORTHY Diastolic dysfunction affects outcomes in patients with functionally single ventricles (FSVs) but is difficult to assess. We found that incoordinate wall motion was the only echo parameter that correlated with FSV end-diastolic pressure, oxygen saturation, pulmonary vascular resistance and flow, and duration of endotracheal intubation. Analysis of incoordinate wall motion in the nondominant (secondary) ventricle strengthened these associations. Analyzing incoordinate wall motion should be included in the assessment of the FSV after the Fontan procedure.
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Affiliation(s)
- Jeong Jin Yu
- Division of Pediatric Cardiology, College of Medicine, University of Ulsan, Seoul, South Korea
| | - Lars Grosse-Wortmann
- Division of Cardiology, School of Medicine, Doernbecher Children's Hospital, Oregon Health & Science University, Portland, Oregon, United States
- Division of Cardiology, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Cameron Slorach
- Division of Cardiology, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Luc Mertens
- Division of Cardiology, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Andreea Dragulescu
- Division of Cardiology, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Mark K Friedberg
- Division of Cardiology, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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Ghosh RM, Whitehead KK, Harris MA, Kalb E, Chen JM, Partington SL, Biko DM, Faerber J, Fogel MA. Longitudinal Trends of Vascular Flow and Growth in Patients Undergoing Fontan Operation. Ann Thorac Surg 2022; 115:1486-1492. [PMID: 35988737 DOI: 10.1016/j.athoracsur.2022.07.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 07/05/2022] [Accepted: 07/19/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Single ventricle (SV) patients undergo multiple surgeries with subsequent changes in anatomy and hemodynamics. There is little cardiac magnetic resonance (CMR) data on serial changes in these patients. This study aimed to assess longitudinal changes of SV anatomy and hemodynamics in a large cohort. METHODS Anatomy and flow in SV patients with serial CMRs performed between 2008-2019 at a single institution were retrospectively reviewed. Mixed-effects linear regression was used to estimate changes over time at 3-9 months, 1-5 years, and >5 years after Fontan. RESULTS 119 patients were included (51% with hypoplastic left heart;77% underwent extra-cardiac Fontan). 88 patients had 3 serial CMRs. Indexed right superior vena cava (RSVC), inferior vena cava (IVC), neo-aortic valve and descending aorta area decreased over time (beta -0.19,-0.44,-0.23 respectively;p<0.01) as did indexed RSVC, neo and native aorta and descending aorta flow (beta -0.49,-0.53,-0.59 respectively;p<0.0001). IVC flow and its contribution to total caval flow increased (beta 0.33;p<0.0001). Indexed right and left right pulmonary artery (LPA) flow did not change, however indexed LPA area decreased (beta -0.16;p=0.0014) with time. Systemic to pulmonary collateral flow remained unchanged prior to, and early after Fontan (beta -0.54;p=0.42) but decreased with time from Fontan (beta coefficient -0.22;p<0.0001). CONCLUSIONS In this cohort of longitudinally followed SV patients, there are significant trends in vascular size and flow over time from Fontan. These findings can be used as a framework to interpret serial CMR data in the SV, and non-invasively identify deviations from expected patterns prior to the development of clinical symptoms.
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Affiliation(s)
- Reena M Ghosh
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia PA.
| | - Kevin K Whitehead
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia PA
| | - Matthew A Harris
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia PA
| | - Elizabeth Kalb
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia PA; Division of Cardiology, Ann and Robert Lurie Children's Hospital of Chicago, Chicago IL
| | - Jonathan M Chen
- Division of Cardiothoracic Surgery, The Children's Hospital of Philadelphia, Philadelphia PA
| | - Sara L Partington
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia PA
| | - David M Biko
- Department of Radiology, The Children's Hospital of Philadelphia, Philadelphia PA
| | - Jennifer Faerber
- Department of Biomedical and Health Informatics. The Children's Hospital of Philadelphia, Philadelphia PA
| | - Mark A Fogel
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia PA
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Ahmad Z, Jin LH, Penny DJ, Rusin CG, Peskin CS, Puelz C. Optimal Fenestration of the Fontan Circulation. Front Physiol 2022; 13:867995. [PMID: 35846014 PMCID: PMC9280082 DOI: 10.3389/fphys.2022.867995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 05/13/2022] [Indexed: 11/20/2022] Open
Abstract
In this paper, we develop a pulsatile compartmental model of the Fontan circulation and use it to explore the effects of a fenestration added to this physiology. A fenestration is a shunt between the systemic and pulmonary veins that is added either at the time of Fontan conversion or at a later time for the treatment of complications. This shunt increases cardiac output and decreases systemic venous pressure. However, these hemodynamic benefits are achieved at the expense of a decrease in the arterial oxygen saturation. The model developed in this paper incorporates fenestration size as a parameter and describes both blood flow and oxygen transport. It is calibrated to clinical data from Fontan patients, and we use it to study the impact of a fenestration on several hemodynamic variables, including systemic oxygen availability, effective oxygen availability, and systemic venous pressure. In certain scenarios corresponding to high-risk Fontan physiology, we demonstrate the existence of a range of fenestration sizes in which the systemic oxygen availability remains relatively constant while the systemic venous pressure decreases.
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Affiliation(s)
- Zan Ahmad
- Courant Institute of Mathematical Sciences, New York University, New York, NY, United States
| | - Lynn H. Jin
- Courant Institute of Mathematical Sciences, New York University, New York, NY, United States
- School of Physics, Georgia Institute of Technology, Atlanta, GA, United States
| | - Daniel J. Penny
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine and Texas Children’s Hospital, Houston, TX, United States
| | - Craig G. Rusin
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine and Texas Children’s Hospital, Houston, TX, United States
| | - Charles S. Peskin
- Courant Institute of Mathematical Sciences, New York University, New York, NY, United States
| | - Charles Puelz
- Courant Institute of Mathematical Sciences, New York University, New York, NY, United States
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine and Texas Children’s Hospital, Houston, TX, United States
- *Correspondence: Charles Puelz,
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Villa C, Greenberg JW, Morales DL. Mechanical Support for the Failing Single Ventricle After Fontan. JTCVS Tech 2022; 13:174-181. [PMID: 35713590 PMCID: PMC9195612 DOI: 10.1016/j.xjtc.2021.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 12/04/2021] [Indexed: 11/30/2022] Open
Affiliation(s)
| | | | - David L.S. Morales
- Address for reprints: David L. S. Morales, MD, Pediatric Cardiothoracic Surgery, The Heart Institute, Cincinnati Children's Hospital Medical Center, The University of Cincinnati College of Medicine, 3333 Burnet Ave – MLC 2004, Cincinnati, OH 45229.
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Pisesky A, Reichert MJE, de Lange C, Seed M, Yoo SJ, Lam CZ, Grosse-Wortmann L. Adverse fibrosis remodeling and aortopulmonary collateral flow are associated with poor Fontan outcomes. J Cardiovasc Magn Reson 2021; 23:134. [PMID: 34781968 PMCID: PMC8591885 DOI: 10.1186/s12968-021-00782-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 05/26/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The extent and significance in of cardiac remodeling in Fontan patients are unclear and were the subject of this study. METHODS This retrospective cohort study compared cardiovascular magnetic resonance (CMR) imaging markers of cardiac function, myocardial fibrosis, and hemodynamics in young Fontan patients to controls. RESULTS Fifty-five Fontan patients and 44 healthy controls were included (median age 14 years (range 7-17 years) vs 13 years (range 4-14 years), p = 0.057). Fontan patients had a higher indexed end-diastolic ventricular volume (EDVI 129 ml/m2 vs 93 ml/m2, p < 0.001), and lower ejection fraction (EF 45% vs 58%, p < 0.001), circumferential (CS - 23.5% vs - 30.8%, p < 0.001), radial (6.4% vs 8.2%, p < 0.001), and longitudinal strain (- 13.3% vs - 24.8%, p < 0.001). Compared to healthy controls, Fontan patients had higher extracellular volume fraction (ECV) (26.3% vs 20.6%, p < 0.001) and native T1 (1041 ms vs 986 ms, p < 0.001). Patients with a dominant right ventricle demonstrated larger ventricles (EDVI 146 ml/m2 vs 120 ml/m2, p = 0.03), lower EF (41% vs 47%, p = 0.008), worse CS (- 20.1% vs - 25.6%, p = 0.003), and a trend towards higher ECV (28.3% versus 24.1%, p = 0.09). Worse EF and CS correlated with longer cumulative bypass (R = - 0.36, p = 0.003 and R = 0.46, p < 0.001), cross-clamp (R = - 0.41, p = 0.001 and R = 0.40, p = 0.003) and circulatory arrest times (R = - 0.42, p < 0.001 and R = 0.27, p = 0.03). T1 correlated with aortopulmonary collateral (APC) flow (R = 0.36, p = 0.009) which, in the linear regression model, was independent of ventricular morphology (p = 0.9) and EDVI (p = 0.2). The composite outcome (cardiac readmission, cardiac reintervention, Fontan failure or any clinically significant arrhythmia) was associated with increased native T1 (1063 ms vs 1026 ms, p = 0.029) and EDVI (146 ml/m2 vs 118 ml/m2, p = 0.013), as well as decreased EF (42% vs 46%, p = 0.045) and worse CS (- 22% vs - 25%, p = 0.029). APC flow (HR 5.5 CI 1.9-16.2, p = 0.002) was independently associated with the composite outcome, independent of ventricular morphology (HR 0.71 CI 0.30-1.69 p = 0.44) and T1 (HR1.006 CI 1.0-1.13, p = 0.07). CONCLUSIONS Pediatric Fontan patients have ventricular dysfunction, altered myocardial mechanics and increased fibrotic remodeling. Cumulative exposure to cardiopulmonary bypass and increased aortopulmonary collateral flow are associated with myocardial dysfunction and fibrosis. Cardiac dysfunction, fibrosis, and collateral flow are associated with adverse outcomes.
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Affiliation(s)
- Andrea Pisesky
- Department of Paediatrics, Division of Cardiology, The Hospital for Sick Children, University of Toronto, Labatt Family Heart Center, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.
| | - Marjolein J E Reichert
- Department of Paediatrics, Division of Cardiology, The Hospital for Sick Children, University of Toronto, Labatt Family Heart Center, 555 University Avenue, Toronto, ON, M5G 1X8, Canada
| | - Charlotte de Lange
- Division of Radiology and Nuclear Medicine, Pediatric section, Rikshospitalet, Oslo University Hospital, Oslo, Norway
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Mike Seed
- Department of Paediatrics, Division of Cardiology, The Hospital for Sick Children, University of Toronto, Labatt Family Heart Center, 555 University Avenue, Toronto, ON, M5G 1X8, Canada
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Shi-Joon Yoo
- Department of Paediatrics, Division of Cardiology, The Hospital for Sick Children, University of Toronto, Labatt Family Heart Center, 555 University Avenue, Toronto, ON, M5G 1X8, Canada
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Christopher Z Lam
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Lars Grosse-Wortmann
- Department of Paediatrics, Division of Cardiology, The Hospital for Sick Children, University of Toronto, Labatt Family Heart Center, 555 University Avenue, Toronto, ON, M5G 1X8, Canada
- Department of Pediatrics, Doernbecher Children's Hospital, Oregon Health and Science University, Portland, OR, USA
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Pushparajah K. Non-invasive Imaging in the Evaluation of Cardiac Shunts for Interventional Closure. Front Cardiovasc Med 2021; 8:651726. [PMID: 34222361 PMCID: PMC8253251 DOI: 10.3389/fcvm.2021.651726] [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: 01/10/2021] [Accepted: 04/08/2021] [Indexed: 11/13/2022] Open
Abstract
Multimodality imaging provides important information to guide patient selection and pre-procedural decision making for shunt lesions in CHD. While echocardiography, CT, and CMR are well-established, 3D printing and now virtual reality imaging are beginning to show promise.
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Affiliation(s)
- Kuberan Pushparajah
- School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, London, United Kingdom.,Department of Paediatric Cardiology, Evelina London Children's Hospital, London, United Kingdom
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7
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Latus H, Kruppa P, Hofmann L, Reich B, Jux C, Apitz C, Schranz D, Voges I, Khalil M, Gummel K. Impact of aortopulmonary collateral flow and single ventricle morphology on longitudinal hemodynamics in Fontan patients: A serial CMR study. Int J Cardiol 2020; 311:28-34. [DOI: 10.1016/j.ijcard.2020.01.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 12/06/2019] [Accepted: 01/27/2020] [Indexed: 11/30/2022]
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Caro-Dominguez P, Chaturvedi R, Chavhan G, Ling SC, Yim D, Porayette P, Lam CZ, Kim TK, Seed M, Grosse-Wortmann L, Yoo SJ. Magnetic Resonance Imaging Assessment of Blood Flow Distribution in Fenestrated and Completed Fontan Circulation with Special Emphasis on Abdominal Blood Flow. Korean J Radiol 2020; 20:1186-1194. [PMID: 31270982 PMCID: PMC6609425 DOI: 10.3348/kjr.2018.0921] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 03/05/2019] [Indexed: 11/21/2022] Open
Abstract
Objective To investigate the regional flow distribution in patients with Fontan circulation by using magnetic resonance imaging (MRI). Materials and Methods We identified 39 children (18 females and 21 males; mean age, 9.3 years; age range, 3.3–17.0 years) with Fontan circulation in whom flow volumes across the thoracic and abdominal arteries and veins were measured by using MRI. The patients were divided into three groups: fenestrated Fontan circulation group with MRI performed under general anesthesia (GA) (Group 1, 15 patients; average age, 5.9 years), completed Fontan circulation group with MRI performed under GA (Group 2, 6 patients; average age, 8.7 years), and completed Fontan circulation group with MRI performed without GA (Group 3, 18 patients; average age, 12.5 years). The patient data were compared with the reference ranges in healthy controls. Results In comparison with the controls, Group 1 showed normal cardiac output (3.92 ± 0.40 vs. 3.72 ± 0.69 L/min/m2, p = 0.30), while Group 3 showed decreased cardiac output (3.24 ± 0.71 vs. 3.96 ± 0.64 L/min/m2, p = 0.003). Groups 1 and 3 showed reduced abdominal flow (1.21 ± 0.28 vs. 2.37 ± 0.45 L/min/m2, p < 0.001 and 1.89 ± 0.39 vs. 2.64 ± 0.38 L/min/m2, p < 0.001, respectively), which was mainly due to the diversion of the cardiac output to the aortopulmonary collaterals in Group 1 and the reduced cardiac output in Group 3. Superior mesenteric and portal venous flows were more severely reduced in Group 3 than in Group 1 (ratios between the flow volumes of the patients and healthy controls was 0.26 and 0.37 in Group 3 and 0.63 and 0.53 in Group 1, respectively). Hepatic arterial flow was decreased in Group 1 (0.11 ± 0.22 vs. 0.34 ± 0.38 L/min/m2, p = 0.04) and markedly increased in Group 3 (0.38 ± 0.22 vs. −0.08 ± 0.29 L/min/m2, p < 0.0001). Group 2 showed a mixture of the patterns seen in Groups 1 and 3. Conclusion Fontan circulation is associated with reduced abdominal flow, which can be attributed to reduced cardiac output and portal venous return in completed Fontan circulation, and diversion of the cardiac output to the aortopulmonary collaterals in fenestrated Fontan circulation.
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Affiliation(s)
- Pablo Caro-Dominguez
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Rajiv Chaturvedi
- The Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Govind Chavhan
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Simon C Ling
- Division of Gastroenterology, Hepatology & Nutrition, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Deane Yim
- The Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Prashob Porayette
- The Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Christopher Z Lam
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Tae Kyoung Kim
- Department of Medical Imaging, University Health Network, University of Toronto, Toronto, Canada
| | - Mike Seed
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, Canada.,The Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Lars Grosse-Wortmann
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, Canada.,The Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Shi Joon Yoo
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, Toronto, Canada.,The Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, Canada.
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Smaś-Suska M, Róg B, Weryński P, Płazak W, Komar M, Olszowska M, Podolec P, Tomkiewicz-Pająk L. Long-Term Effects of Percutaneous Fenestration Following the Fontan Procedure in Adult Patients with Congenital Univentricular Heart. Med Sci Monit 2018; 24:3506-3513. [PMID: 29802801 PMCID: PMC5996839 DOI: 10.12659/msm.905786] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background The Fontan procedure, performed for univentricular heart, may also include the technique of percutaneous fenestration to create a small atrial septal defect (ASD) and a right-to-left shunt. The aim of this study was to evaluate the long-term effects of fenestration in adult patients who had a Fontan procedure for univentricular heart. Material/Methods Fontan surgery was performed in 39 patients, including 19 (49%) patients with fenestration (Group I), and 20 (51%) patients without the fenestration procedure (Group II). Laboratory tests in both groups included echocardiography, plethysmography, cardiopulmonary exercise testing, and 24-hour Holter monitoring. Results Compared with patients in Group I, patients in Group II had a significantly increased level of N-terminal pro-brain natriuretic peptide (NT-proBNP) (p=0.04), alkaline phosphatase (ALP) (p=0.01) and a significant increase in frequency of atrial fibrillation (p=0.04). Patients in Group I had a significantly increased systemic ventricular ejection fraction (SVEF) (p=0.05) and increased heart rate (HR) (p=0.006), heart rate reserve (HRR) (p=0.02), ventilatory equivalent (VE) (p=0.01), and VO2 peak (p=0.05) on cardiopulmonary exercise testing (CPET). Renal, hematologic, and ventilatory parameters, and incidence of thromboembolism showed no significant differences between the groups. Conclusions Long-term follow-up of patients who underwent Fontan procedures with percutaneous fenestration had improved single ventricular function, lower NT-proBNP levels, improved exercise capacity, and reduced ALP levels. These findings indicate that percutaneous fenestration closure should be considered for adult patients who have undergone Fontan procedure for univentricular heart.
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Affiliation(s)
- Monika Smaś-Suska
- Departament of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
| | - Beata Róg
- Outpatient Department of Cardiology and Cardiac Surgery, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
| | - Piotr Weryński
- Department of Pediatric Cardiology, Polish-American Institute of Pediatrics (PAIP), Jagiellonian University, Medical College, Cracow, Poland
| | - Wojciech Płazak
- Departament of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
| | - Monika Komar
- Departament of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
| | - Maria Olszowska
- Departament of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
| | - Piotr Podolec
- Departament of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
| | - Lidia Tomkiewicz-Pająk
- Departament of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University Medical College, Cracow, Poland
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Impact of the location of the fenestration on Fontan circulation haemodynamics: a three-dimensional, computational model study. Cardiol Young 2017; 27:1289-1294. [PMID: 28376950 DOI: 10.1017/s1047951117000099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES There is no consensus or theoretical explanation regarding the optimal location for the fenestration during the Fontan operation. We investigated the impact of the location of the fenestration on Fontan haemodynamics using a three-dimensional Fontan model in various physiological conditions. METHODS A three-dimensional Fontan model was constructed on the basis of CT images, and a 4-mm-diameter fenestration was located between the extracardiac Fontan conduit and the right atrium at three positions: superior, middle, and inferior part of the conduit. Haemodynamics in the Fontan route were analysed using a three-dimensional computational fluid dynamic model in realistic physiological conditions, which were predicted using a lumped parameter model of the cardiovascular system. The respiratory effect of the caval flow was taken into account. The flow rate through the fenestration, the effect of lowering the central venous pressure, and wall shear stress in the Fontan circuit were evaluated under central venous pressures of 10, 15, and 20 mmHg. The pulse power index and pulsatile energy loss index were calculated as energy loss indices. RESULTS Under all central venous pressures, the middle-part fenestration demonstrated the most significant effect on enhancing the flow rate through the fenestration while lowering the central venous pressure. The middle-part fenestration produced the highest time-averaged wall shear stress, pressure pulse index, and pulsatile energy loss index. CONCLUSIONS Despite slightly elevated energy loss, the middle-part fenestration most significantly increased cardiac output and lowered central venous pressure under respiration in the Fontan circulation.
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11
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Chungsomprasong P, Hamilton R, Luining W, Fatah M, Yoo SJ, Grosse-Wortmann L. Left Ventricular Function in Children and Adolescents With Arrhythmogenic Right Ventricular Cardiomyopathy. Am J Cardiol 2017; 119:778-784. [PMID: 28040191 DOI: 10.1016/j.amjcard.2016.11.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/10/2016] [Accepted: 11/10/2016] [Indexed: 10/20/2022]
Abstract
The aim of this study was to determine if left ventricular (LV) contractility is reduced in children with arrhythmogenic right ventricular cardiomyopathy (ARVC). For this retrospective study, children and adolescents undergoing a workup for ARVC were characterized according to the revised Task Force Criteria (rTFC). LV strain, rotation, and torsion were measured by feature-tracking cardiovascular magnetic resonance imaging (CMR). Of 142 pediatric patients, 41% had no, 23% possible, 20% borderline, and 16% definite ARVC. LV ejection fraction (EF) did not differ between rTFC categories. Patients in higher rTFC categories had lower right ventricular (RV) EF z-scores (Z-), higher Z-RV end-diastolic volumes (EDVs) and larger Z-LVEDVs (p <0.001, p = 0.002 and 0.013, respectively). LV global circumferential strain was lower in higher rTFC categories (p = 0.018). Z-LVEDV correlated with Z-RVEDV, and Z-LVEF correlated with Z-RVEF (r = 0.69 and r = 0.55, both p <0.001). Z-LVEF and Z-RVEF correlated with LV global circumferential strain (r = 0.48 and r = 0.46, both p <0.001). Forty-eight patients (34%) underwent follow-up CMR investigations after a mean of 3.2 ± 1.9 (0.4 to 8.4) years. A decrease of Z-LVEF over time correlated with that of Z-RVEF (r = 0.35), and Z-LVEDV increase correlated with Z-RVEDV increase (r = 0.57). In conclusion, LV myocardial dysfunction is present in young patients with suspected ARVC. Progressive LV dysfunction assessed by conventional CMR and feature-tracking and enlargement over time parallel adverse remodeling of the RV.
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Latus H, Gerstner B, Kerst G, Moysich A, Gummel K, Apitz C, Bauer J, Schranz D. Effect of Inhaled Nitric Oxide on Blood Flow Dynamics in Patients After the Fontan Procedure Using Cardiovascular Magnetic Resonance Flow Measurements. Pediatr Cardiol 2016; 37:504-11. [PMID: 26547436 DOI: 10.1007/s00246-015-1307-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 11/02/2015] [Indexed: 10/22/2022]
Abstract
Invasive hemodynamic studies have shown that nitric oxide (NO), a selective pulmonary vasodilator, can lower pulmonary vascular resistance in Fontan patients. Because oximetry-derived flow quantification may be unreliable, we sought to detect changes in blood flow within the Fontan circulation after inhalation of NO using cardiovascular magnetic resonance (CMR). Thirty-three patients (mean age 12.8 ± 7.0 years) after the Fontan procedure underwent CMR as part of their routine clinical assessment. Standard two-dimensional blood flow measurements were performed in the Fontan tunnel, superior vena cava (SVC) and ascending aorta (AAO) before and after inhalation of 40 ppm NO for 8-10 min. Systemic-to-pulmonary collateral (SPC) flow was calculated as AAO - (SVC + tunnel). Heart rate (82 ± 18 to 81 ± 18 bpm; p = 0.31) and transcutaneous oxygen saturations (93 ± 4 to 94 ± 3 %; p = 0.13) did not change under NO inhalation. AAO flow (3.23 ± 0.72 to 3.12 ± 0.79 l/min/m(2); p = 0.08) decreased, tunnel flow (1.58 ± 0.40 to 1.65 ± 0.46 l/min/m(2); p = 0.032) increased, and SVC flow (1.01 ± 0.39 to 1.02 ± 0.40 l/min/m(2); p = 0.50) remained unchanged resulting in higher total caval flow (Qs) (2.59 ± 0.58 to 2.67 ± 0.68 l/min/m(2); p = 0.038). SPC flow decreased significantly from 0.64 ± 0.52 to 0.45 ± 0.51 l/min/m(2) (p = 0.002) and resulted in a significant decrement of the Qp/Qs ratio (1.23 ± 0.23 to 1.15 ± 0.23; p = 0.001). Inhalation of NO in Fontan patients results in significant changes in pulmonary and systemic blood flow. The reduction in SPC flow is accompanied by a net increase in effective systemic blood flow suggesting beneficial effects of pulmonary vasodilators on cardiac output, tissue perfusion and exercise capacity.
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Affiliation(s)
- Heiner Latus
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany.
| | - Bettina Gerstner
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
| | - Gunter Kerst
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
| | - Axel Moysich
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
| | - Kerstin Gummel
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
| | - Christian Apitz
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
| | - Juergen Bauer
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
| | - Dietmar Schranz
- Pediatric Heart Center, Justus-Liebig-University of Giessen, Feulgenstr. 12, 35392, Giessen, Germany
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Pihkala JI, Järvelä M, Boldt T, Jokinen E, Liikanen I, Mattila I, Eerola A. Fate of fenestration in children treated with fontan operation. Catheter Cardiovasc Interv 2015; 87:E233-9. [DOI: 10.1002/ccd.26324] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 10/09/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Jaana I. Pihkala
- Department of Pediatric Cardiology; Children's Hospital, University of Helsinki and Helsinki University Hospital; Helsinki Finland
| | - Merit Järvelä
- Department of Pediatric Cardiology; Children's Hospital, University of Helsinki and Helsinki University Hospital; Helsinki Finland
| | - Talvikki Boldt
- Department of Pediatric Cardiology; Children's Hospital, University of Helsinki and Helsinki University Hospital; Helsinki Finland
| | - Eero Jokinen
- Department of Pediatric Cardiology; Children's Hospital, University of Helsinki and Helsinki University Hospital; Helsinki Finland
| | - Ilkka Liikanen
- Department of Pediatric Cardiology; Children's Hospital, University of Helsinki and Helsinki University Hospital; Helsinki Finland
| | - Ilkka Mattila
- Department of Pediatric and Transplantation Surgery; Children's Hospital, University of Helsinki and Helsinki University Hospital; Helsinki Finland
| | - Anneli Eerola
- Department of Pediatrics; University Hospital of Tampere; Tampere Finland
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Chin AJ, Watrous RL. Model-Based Comparison of the Normal and Fontan Circulatory Systems—Part II. World J Pediatr Congenit Heart Surg 2015; 6:360-73. [DOI: 10.1177/2150135115581386] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: In the absence of an accessible chronic animal model of the Fontan circulation, computational modeling can provide insights into this unique circulatory arrangement, especially how differently it behaves from the normal mammalian circulation. Many groups have focused on refining a single element of the entire Fontan circulation—the total cavopulmonary connection (TCPC). Yet, only modest improvements in transplant-free survival have resulted. From an engineering perspective, optimizing the performance of a complex, multiparameter system requires an understanding of how the performance is affected by the full set of system parameters. Methods: We evaluated the hemodynamic impact of nine physiological perturbations in the two-year-old (yo) patient with hypoplastic left heart syndrome having a Fontan rearrangement (using our previously described lumped-parameter multicompartment model of both pulmonary and systemic circulations). In cases where comparison is appropriate, we evaluated the hemodynamic impact of analogous pathophysiologies in the normal two-year-olds. We operated the model in open-loop mode in order to expose the magnitude of the impact of uncompensated physiological perturbations. Results: Without the benefit of compensatory mechanisms, a valvar regurgitant fraction of 50% is sufficient to drop the cardiac index (CI) to 2.0 L/min/m2 or less. Aortopulmonary collateral flow of 0.6 L/min (1.1 L/min/m2) or 0.5 L/min (0.9 L/min/m2), sufficient to raise the ratio of pulmonary flow to systemic flow (Qp/Qs) to no higher than 1.2 or 1.5 (fenestration present or absent, respectively), is the maximum which could be tolerated (CI = 2.0 L/min/m2) without the help of compensatory mechanisms. Ventricular end-diastolic elastance (stiffness) changes have dramatic effects on CI in a Fontan circulatory arrangement. Conclusions: Several components of the Fontan circulation other than the TCPC actually have equal, or greater, impact on CI under certain conditions.
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Affiliation(s)
- Alvin J. Chin
- Division of Cardiology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Raymond L. Watrous
- Division of Cardiology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
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Whitehead KK, Harris MA, Glatz AC, Gillespie MJ, DiMaria MV, Harrison NE, Dori Y, Keller MS, Rome JJ, Fogel MA. Status of systemic to pulmonary arterial collateral flow after the fontan procedure. Am J Cardiol 2015; 115:1739-45. [PMID: 25907503 DOI: 10.1016/j.amjcard.2015.03.022] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 03/10/2015] [Accepted: 03/10/2015] [Indexed: 10/23/2022]
Abstract
The investigators recently validated a method of quantifying systemic-to-pulmonary arterial collateral flow using phase-contrast magnetic resonance imaging velocity mapping. Cross-sectional data suggest decreased collateral flow in patients with total cavopulmonary connections (TCPCs) compared with those with superior cavopulmonary connections (SCPCs). However, no studies have examined serial changes in collateral flow from SCPCs to TCPCs in the same patients. The aim of this study was to examine differences in collateral flow between patients with SCPCs and those with TCPCs. Collateral flow was quantified by 2 independent measures from 250 single-ventricle studies in 219 different patients (115 SCPC and 135 TCPC studies, 31 patients with both) and 18 controls, during routine studies using through-plane phase-contrast magnetic resonance imaging. Collateral flow was indexed to body surface area, aortic flow, and pulmonary venous flow. Regardless of indexing method, SCPC patients had significantly higher collateral flow than TCPC patients (1.64 ± 0.8 vs 1.03 ± 0.8 L/min/m(2), p <0.001). In 31 patients who underwent serial examinations, collateral flow as a fraction of aortic flow increased early after TCPC completion. In TCPC patients, indexed collateral flow demonstrated a significant negative correlation with time from TCPC. In conclusion, SCPC and TCPC patients demonstrate substantial collateral flow, with SCPC patients having higher collateral flow than TCPC patients overall. On the basis of the paired subset analysis, collateral flow does not decrease in the short term after TCPC completion and trends toward an increase. In the long term, however, collateral flow decreases over time after TCPC completion.
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Rahkonen O, Chaturvedi RR, Benson L, Honjo O, Caldarone CA, Lee KJ. Pulmonary artery stenosis in hybrid single-ventricle palliation: High incidence of left pulmonary artery intervention. J Thorac Cardiovasc Surg 2015; 149:1102-10.e2. [DOI: 10.1016/j.jtcvs.2014.11.080] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/17/2014] [Accepted: 11/28/2014] [Indexed: 10/24/2022]
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Persistent fenestration may be a marker for physiologic intolerance after Fontan completion. J Thorac Cardiovasc Surg 2014; 148:2532-8. [DOI: 10.1016/j.jtcvs.2014.06.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 05/31/2014] [Accepted: 06/27/2014] [Indexed: 11/19/2022]
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