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Chaix MA, Ibrahim R, Tardif JC, Roy C, Mongeon FP, Dore A, Mondésert B, Khairy P. Pulmonary vascular disease and optical coherence tomography imaging in patients with Fontan palliation. Expert Rev Cardiovasc Ther 2024; 22:153-158. [PMID: 38477934 DOI: 10.1080/14779072.2024.2330657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 03/11/2024] [Indexed: 03/14/2024]
Abstract
INTRODUCTION The Fontan procedure is the palliative procedure of choice for patients with single ventricle physiology. Pulmonary vascular disease (PVD) is an important contributor to Fontan circulatory failure. AREAS COVERED We review the pathophysiology of PVD in patients with Fontan palliation and share our initial experience with optical coherence tomography (OCT) in supplementing standard hemodynamics in characterizing Fontan-associated PVD. In the absence of a sub-pulmonary ventricle, low pulmonary vascular resistance (PVR; ≤2 WU/m2) is required to sustain optimal pulmonary blood flow. PVD is associated with adverse pulmonary artery (PA) remodeling resulting from the non-pulsatile low-shear low-flow circulation. Predisposing factors to PVD include impaired PA growth, endothelial dysfunction, hypercoagulable state, and increased ventricular end-diastolic pressure. OCT parameters that show promise in characterizing Fontan-associated PVD include the PA intima-to-media ratio and wall area ratio (i.e. difference between the whole-vessel area and the luminal area divided by the whole-vessel area). EXPERT OPINION OCT carries potential in characterizing PVD in patients with Fontan palliation. PA remodeling is marked by intimal hyperplasia, with medial regression. Further studies are required to determine the role of OCT in informing management decisions and assessing therapeutic responses.
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Affiliation(s)
- Marie-A Chaix
- Adult Congenital Heart Center, Montreal Heart Institute, Department of Medicine, Université de Montréal, Montreal, Canada
- Research Center, Montreal Heart Institute; Department of Medicine, Université de Montréal, Montreal, Canada
| | - Réda Ibrahim
- Adult Congenital Heart Center, Montreal Heart Institute, Department of Medicine, Université de Montréal, Montreal, Canada
| | - Jean-Claude Tardif
- Research Center, Montreal Heart Institute; Department of Medicine, Université de Montréal, Montreal, Canada
- Montreal Health Innovations Coordinating Center (MHICC), Montreal, Canada
| | - Colombe Roy
- Research Center, Montreal Heart Institute; Department of Medicine, Université de Montréal, Montreal, Canada
| | - François-Pierre Mongeon
- Adult Congenital Heart Center, Montreal Heart Institute, Department of Medicine, Université de Montréal, Montreal, Canada
| | - Annie Dore
- Adult Congenital Heart Center, Montreal Heart Institute, Department of Medicine, Université de Montréal, Montreal, Canada
| | - Blandine Mondésert
- Adult Congenital Heart Center, Montreal Heart Institute, Department of Medicine, Université de Montréal, Montreal, Canada
| | - Paul Khairy
- Adult Congenital Heart Center, Montreal Heart Institute, Department of Medicine, Université de Montréal, Montreal, Canada
- Research Center, Montreal Heart Institute; Department of Medicine, Université de Montréal, Montreal, Canada
- Montreal Health Innovations Coordinating Center (MHICC), Montreal, Canada
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Huynh E, Chernick R, Desai M. Francis Fontan (1929-2018): Pioneer pediatric cardiac surgeon. JOURNAL OF MEDICAL BIOGRAPHY 2024; 32:110-118. [PMID: 36069037 DOI: 10.1177/09677720221123322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Up until the mid-1900s, tricuspid atresia - a birth defect of the tricuspid valve, was once categorized as a "death sentence." The challenge of achieving positive health outcomes for affected patients was compounded by a hesitancy to operate on children. The main concern was safely administering anesthesia to young patients who were going through a strenuous operation that was often poorly tolerated. Despite these assumed limitations, Francis Fontan, a pediatric cardiothoracic surgeon at the Hospital of Tondu in Bordeaux, was able to redirect blood flow from the superior and inferior vena cava to the pulmonary arteries in 1971, which elucidated the process of advancing clinical practice in medicine. With the support of mentors and a firm belief in this new technique, Fontan pioneered his eponymous procedure and ultimately paved the way for modern cardiovascular surgical techniques that helped to prolong the life of those with single functioning ventricles. The aim of this study is to examine the genesis and the evolution of the Fontan procedure to elucidate the process of advancing clinical practice in medicine by utilizing personal interviews, Fontan's works, associated primary and secondary sources in the context of 20th century cardiothoracic surgery and innovations.
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Affiliation(s)
| | | | - Manisha Desai
- Department of Anesthesiology and Perioperative Medicine, UMass Chan Medical School, Worcester, MA, USA
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Benjamin C, Franklin WJ, Garn B, Awerbach JD. Transcatheter thrombectomy of acute pulmonary embolism in an adult Fontan patient: a case report. Eur Heart J Case Rep 2023; 7:ytad401. [PMID: 37719000 PMCID: PMC10500413 DOI: 10.1093/ehjcr/ytad401] [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: 12/12/2022] [Revised: 08/02/2023] [Accepted: 08/15/2023] [Indexed: 09/19/2023]
Abstract
Background The Fontan operation is a well-described palliative procedure for functional single-ventricle patients. This population has an increased risk of thrombo-embolic events. Adequate imaging, and therefore diagnosis, requires an understanding of the unique anatomy and physiology of a Fontan. Optimal strategies for the prevention and treatment of thrombo-embolic complications in the Fontan population are poorly defined. Case summary A 28-year-old female with a history of Ebstein anomaly of the tricuspid valve status post-Fontan presented with chest pain and acute hypoxia. Computed tomographic angiography (CTA) reported a submassive pulmonary embolism (PE). She was initiated on a heparin drip. Catheterization demonstrated elevated Fontan pressures and a large thrombus in the right lower pulmonary artery that was removed with an aspiration device. The patient was transitioned to a direct oral anticoagulant (DOAC) following the procedure. Discussion Thrombotic complications are common in the adult Fontan population. Given the morbidity and mortality associated with this complication, the use of proper imaging techniques is imperative. Traditional CTA imaging for PE in Fontan patients often has contrast filling defects related to their anatomy and physiology. Utilization of adequate imaging techniques helps decrease cost and additional radiation exposure. In addition, it avoids inappropriate hospitalization, need for anticoagulation, and potential need for catheterization toconfirm or exclude the presence of PE. For Fontan patients with a thrombus, prior event, and no contraindications, current guidelines recommend oral anticoagulation with a vitamin K antagonist; however, there are increasing data on the use of DOACs in this population.
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Affiliation(s)
- Christina Benjamin
- Center for Heart Care, Phoenix Children’s, 1919 E Thomas Rd, Phoenix, AZ 85016, USA
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Wayne J Franklin
- Center for Heart Care, Phoenix Children’s, 1919 E Thomas Rd, Phoenix, AZ 85016, USA
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Byron Garn
- Center for Heart Care, Phoenix Children’s, 1919 E Thomas Rd, Phoenix, AZ 85016, USA
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Jordan D Awerbach
- Center for Heart Care, Phoenix Children’s, 1919 E Thomas Rd, Phoenix, AZ 85016, USA
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
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Skubera M, Gołąb A, Sternalski T, Trojnarska O, Plicner D, Smaś-Suska M, Mazurek-Kula A, Bartczak-Rutkowska A, Pająk J, Podolec P, Tomkiewicz-Pająk L. Thromboembolic Complications in Adult Patients Following Fontan Procedure-A Multicenter Study. J Clin Med 2023; 12:jcm12103465. [PMID: 37240571 DOI: 10.3390/jcm12103465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/20/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND Morbidity and mortality following Fontan (FO) surgery are primarily thromboembolic in nature. However, follow-up data regarding thromboembolic complications (TECs) in adult patients after FO procedure are inconsistent. In this multicenter study, we investigated the incidence of TECs in FO patients. METHODS We studied 91 patients who underwent FO procedure. Clinical data, laboratory, and imaging investigations were collected prospectively during the scheduled medical appointments in 3 Adult Congenital Heart Disease Departments in Poland. TECs were recorded during a median follow-up of 31 months. RESULTS Four patients (4.4%) were lost to follow-up. The mean age of patients was 25.3 (±6.0) years at enrollment, and the mean time between FO operation and investigation was 22.1 (±5.1) years. A total of 21 out of 91 patients (23.1%) had a history of 24 TECs since an FO procedure, mainly pulmonary embolism (PE; n = 12, 13.2%), including 4 (33.3%) silent PE. The mean time since FO operation to the first TEC was 17.8 (±5.1) years. During follow-up, we documented 9 TECs in 7 (8.0%) patients, mainly PE (n = 5, 5.5%). Most patients with TEC had a left type of systemic ventricle (57.1%). Three patients (42.9%) were treated with aspirin, 3 (3.4%) with Vitamin K antagonists or novel oral anticoagulants, and 1 patient had no antithrombotic treatment at the time of TEC occurrence. Supraventricular tachyarrhythmias were present in 3 patients (42.9%). CONCLUSIONS This prospective study shows that TECs are common in FO patients, and a significant number of these events occur during adolescence and young adulthood. We also indicated how much TECs are underestimated in the growing adult FO population. The complexity of the problem requires more studies, especially to standardize the prevention of TECs in the whole FO population.
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Affiliation(s)
- Maciej Skubera
- Department of Cardiac and Vascular Diseases, John Paul II Hospital, 31-202 Krakow, Poland
| | - Aleksandra Gołąb
- Faculty of Medicine and Dentistry, Pomeranian Medical University in Szczecin, 70-204 Szczecin, Poland
- Center for Research and Innovative Technology, John Paul II Hospital, 31-202 Krakow, Poland
| | - Tomasz Sternalski
- Faculty of Medicine, Collegium Medicum Jagiellonian University, 31-008 Krakow, Poland
| | - Olga Trojnarska
- 1st Department of Cardiology, Poznan University of Medical Sciences, 61-701 Poznan, Poland
| | - Dariusz Plicner
- Department of Cardiovascular Surgery and Transplantation, John Paul II Hospital, 31-202 Krakow, Poland
- Unit of Experimental Cardiology and Cardiac Surgery, Faculty of Medicine and Health Sciences, Andrzej Frycz Modrzewski Krakow University, 30-705 Krakow, Poland
| | - Monika Smaś-Suska
- Department of Liver Diseases, John Paul II Hospital, 31-202 Krakow, Poland
| | - Anna Mazurek-Kula
- Department of Cardiology, Polish Mother's Memorial Hospital, Research Institute, 93-338 Lodz, Poland
| | | | - Jacek Pająk
- Institute of Medical Sciences, Department of Surgery, Medical College of Rzeszow University, 35-025 Rzeszow, Poland
| | - Piotr Podolec
- Department of Cardiac and Vascular Diseases, John Paul II Hospital, 31-202 Krakow, Poland
- Institute of Cardiology, Jagiellonian University Medical College, 31-008 Krakow, Poland
| | - Lidia Tomkiewicz-Pająk
- Department of Cardiac and Vascular Diseases, John Paul II Hospital, 31-202 Krakow, Poland
- Department of Liver Diseases, John Paul II Hospital, 31-202 Krakow, Poland
- Institute of Cardiology, Jagiellonian University Medical College, 31-008 Krakow, Poland
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Heidendael JF, Engele LJ, Bouma BJ, Dipchand AI, Thorne SA, McCrindle BW, Mulder BJM. Coagulation and Anticoagulation in Fontan Patients. Can J Cardiol 2022; 38:1024-1035. [PMID: 35122939 DOI: 10.1016/j.cjca.2022.01.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/17/2022] [Accepted: 01/27/2022] [Indexed: 01/22/2023] Open
Abstract
Patients with a Fontan circulation for single-ventricle physiology are at increased risk of developing thromboembolic events. Thromboembolic events can lead to failure of the Fontan circulation, chronic sequelae in case of stroke, and early mortality. Controversies exist regarding the substrates, risk factors, and optimal detection methods for thromboembolic events. Despite the major clinical implications, there is currently no consensus regarding the optimal antithrombotic therapy to prevent or treat thromboembolic events after the Fontan procedure. In this review we aimed to untangle the available literature regarding antithrombotic prophylaxis and treatment for pediatric and adult Fontan patients. A decision-tree algorithm for thromboprophylaxis in Fontan patients is proposed. Additionally, the current state of knowledge is reviewed with respect to the epidemiology, pathophysiology, and detection of thromboembolic events in Fontan patients, and important evidence gaps are highlighted.
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Affiliation(s)
- Josephine F Heidendael
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, The Netherlands.
| | - Leo J Engele
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Berto J Bouma
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Anne I Dipchand
- Department of Pediatrics, Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Sara A Thorne
- Department of Cardiology, Peter Munk Cardiac Center, University Health Network, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Brian W McCrindle
- Department of Pediatrics, Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Barbara J M Mulder
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, The Netherlands
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Singh D, Jerrom T, Issitt R, Saxena R. Early thromboembolic complications after total cavopulmonary connection/Fontan operation in children: A five year single centre review. PROGRESS IN PEDIATRIC CARDIOLOGY 2021. [DOI: 10.1016/j.ppedcard.2021.101344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Rychik J. What “FUEL”s the Fontan circulation—solvitur ambulando! J Thorac Cardiovasc Surg 2021; 162:1234-1238. [DOI: 10.1016/j.jtcvs.2020.08.114] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/10/2020] [Accepted: 08/11/2020] [Indexed: 01/01/2023]
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Abdelghani E, Cua CL, Giver J, Rodriguez V. Thrombosis Prevention and Anticoagulation Management in the Pediatric Patient with Congenital Heart Disease. Cardiol Ther 2021; 10:325-348. [PMID: 34184214 PMCID: PMC8555036 DOI: 10.1007/s40119-021-00228-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 01/19/2023] Open
Abstract
Thrombosis is one of the most frequent complications affecting children with congenital heart disease (CHD). Palliative and reparative cardiac surgeries are some of the main players contributing to the thrombosis risk in this patient population. Additional risk factors related to the CHD itself (e.g., cardiac dysfunction, arrhythmias, and polycythemia in cyanotic cardiac disorders) can contribute to thrombogenicity alone or combined with other factors. Thrombotic complications have been recognized as a significant cause of morbidity and mortality in this patient population. Here, we provide an overview of the pathophysiology and risk factors for thrombosis as well as the indications for and use of different anticoagulation, antiplatelet, and thrombolytic agents. In addition, we describe some of most common thrombotic complications and their management in the pediatric CHD population.
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Affiliation(s)
- Eman Abdelghani
- Division of Pediatric Hematology/Oncology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - Clifford L Cua
- Heart Center, Nationwide Children's Hospital, 700 Children's Drive, Columbus, OH, USA. .,Department of Pediatrics, The Ohio State University, Columbus, OH, USA.
| | - Jean Giver
- Division of Pediatric Hematology/Oncology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - Vilmarie Rodriguez
- Division of Pediatric Hematology/Oncology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University, Columbus, OH, USA
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Stephens EH, Tannous P, Mongé MC, Eltayeb O, Devlin PJ, Backer CL, Forbess JM, Pahl E. Normalization of hemodynamics is delayed in patients with a single ventricle after pediatric heart transplantation. J Thorac Cardiovasc Surg 2020; 159:1986-1996. [DOI: 10.1016/j.jtcvs.2019.09.135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 09/04/2019] [Accepted: 09/09/2019] [Indexed: 10/25/2022]
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10
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Cardiovascular complications in patients with total cavopulmonary connection: A nationwide cohort study. Int J Cardiol 2020; 305:120-126. [PMID: 32001036 DOI: 10.1016/j.ijcard.2019.12.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/16/2019] [Accepted: 12/29/2019] [Indexed: 11/24/2022]
Abstract
BACKGROUND Long-term outcomes are not well established at the population level after completion of the total cavopulmonary connection (TCPC) among patients with functional univentricular hearts. PURPOSE To evaluate the incidence of cardiovascular events after TCPC completion. METHODS From a validated population-based cohort, we identified 178 patients with TCPC circulation completed after January 1, 1995. We established a comparison cohort by frequency-matching patients 1:200 on sex, and month and year of birth to the general Danish population (n = 35,600 population controls). We started follow-up at date of TCPC completion for cases and, for controls, at the index date of their matched case. The risks of cardiovascular events were assessed using cumulative incidence rates and Poisson regression models adjusted for age, sex, and calendar year. RESULTS The median age at TCPC completion was 3.3 years (interquartile range 2.6 to 5.3 years). Over a median follow-up of 12.5 years, 10 (5.6%) TCPC patients died and 7 (4.5%) had a heart transplantation compared with a 0.2% mortality in the matched population. In TCPC patients, 15.7% had an arrhythmia (11.8% supraventricular tachycardia), 3.4% had a stroke (all ischemic), and 21.4% of TCPC patients initiated a combination of a diuretic and a renin-angiotensin system (RAS)-inhibitor. These rates were >50-fold higher than in the comparison cohort: 0.2% arrhythmia, 0.06% stroke, and 0.04% starting a diuretic and a RAS-inhibitor. CONCLUSIONS Patients with TCPC circulation face a high risk of cardiovascular events during intermediate term follow-up.
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Laflamme E, Roche SL. Fontan Circuit Thrombus in Adults: Often Silent, Rarely Innocent. Can J Cardiol 2019; 35:1631-1634. [PMID: 31813499 DOI: 10.1016/j.cjca.2019.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 09/19/2019] [Accepted: 09/19/2019] [Indexed: 01/31/2023] Open
Affiliation(s)
- Emilie Laflamme
- Division of Cardiology, Peter Munk Cardiac Centre, University Health Network and University of Toronto, Toronto, Ontario, Canada
| | - S Lucy Roche
- Division of Cardiology, Peter Munk Cardiac Centre, University Health Network and University of Toronto, Toronto, Ontario, Canada.
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12
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Zaki NC, Kelleman MS, James Parks W, Slesnick TC, McConnell ME, Oster ME. The utility of cardiac magnetic resonance imaging in post-Fontan surveillance. CONGENIT HEART DIS 2018; 14:140-146. [PMID: 30378262 DOI: 10.1111/chd.12692] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/17/2018] [Accepted: 08/28/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Gated cardiac MRI offers the most detailed and accurate noninvasive method of assessing cardiac anatomy, particularly in patients with complex congenital heart disease. The proposed benefits of using cMRI as a routine screening tool in the Fontan population include early recognition of asymptomatic, postoperative anatomic and physiologic changes. In 2011, we therefore instituted at our center a recommended practice of cMRI screening in patients with Fontan physiology at 3 and 8 years post-Fontan operation. The purpose of this study was to determine the impact of this standardized practice of cMRI screening on the clinical management of a Fontan population. DESIGN We retrospectively reviewed charts from our institutional Fontan database to determine which patients were eligible for cMRI under the current guidelines and who underwent imaging from November 2002 to June 2015. We reviewed the frequency of cMRI and number of changes in management based on the results. Statistical significance was determined using a chi-square test. RESULTS There were 141 cMRIs performed on 121 patients who met inclusion criteria. The odds of a change in management were significantly greater after clinically indicated cMRI compared to screening cMRI (OR = 3.79, 95% CI: 1.48-9.66, P = .004). There were near significant odds of change in management if the cMRI occurred <8 years after Fontan regardless of whether it was for screening or clinically indicated purposes (OR = 2.43, 95% CI: 0.97-6.08, P = .052). The most frequent change in management was referral for catheterization with pulmonary artery angioplasty. CONCLUSIONS There is an important role for cMRI in routine surveillance of post-Fontan patients. Screening cMRI performed less than 8 years after Fontan palliation offers increased utility compared to studies performed later. The optimal timing of such imaging after Fontan palliation remains unclear.
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Affiliation(s)
- Neil C Zaki
- Emory University School of Medicine, Atlanta, Georgia.,Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | - W James Parks
- Emory University School of Medicine, Atlanta, Georgia.,Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Timothy C Slesnick
- Emory University School of Medicine, Atlanta, Georgia.,Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Michael E McConnell
- Emory University School of Medicine, Atlanta, Georgia.,Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Matthew E Oster
- Emory University School of Medicine, Atlanta, Georgia.,Children's Healthcare of Atlanta, Atlanta, Georgia
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13
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Affiliation(s)
- Gunter Balling
- Department of Pediatric Cardiology and Congenital Heart Diseases, German Heart Center, Technical University Munich, Munich, Germany.
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14
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Karsenty C, Zhao A, Marijon E, Ladouceur M. Risk of thromboembolic complications in adult congenital heart disease: A literature review. Arch Cardiovasc Dis 2018; 111:613-620. [PMID: 29859704 DOI: 10.1016/j.acvd.2018.04.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 04/02/2018] [Accepted: 04/04/2018] [Indexed: 12/13/2022]
Abstract
Adult congenital heart disease (ACHD) is a constantly expanding population with challenging issues. Initial medical and surgical treatments are seldom curative, and the majority of patients still experience late sequelae and complications, especially thromboembolic events. These common and potentially life-threating adverse events are probably dramatically underdiagnosed. Better identification and understanding of thromboembolic risk factors are essential to prevent long-term related morbidities. In addition to specific situations associated with a high risk of thromboembolic events (Fontan circulation, cyanotic congenital heart disease), atrial arrhythmia has been recognized as an important risk factor for thromboembolic events in ACHD. Unlike in patients without ACHD, thromboembolic risk stratification scores, such as the CHA2DS2-VASc score, may not be applicable in ACHD. Overall, after a review of the scientific data published so far, it is clear that the complexity of the underlying congenital heart disease represents a major risk factor for thromboembolic events. As a consequence, prophylactic anticoagulation is indicated in patients with complex congenital heart disease and atrial arrhythmia, regardless of the other risk factors, as opposed to simple heart defects. The landscape of ACHD is an ongoing evolving process, and specific thromboembolic risk scores are needed, especially in the setting of simple heart defects; these should be coupled with specific trials or long-term follow-up of multicentre cohorts.
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Affiliation(s)
- Clement Karsenty
- Adult Congenital Heart Disease Unit, Centre de Référence des Malformations Cardiaques Congénitales Complexes (M3C), 75015 Paris, France; Cardiology Department, Hôpital Européen Georges-Pompidou, 75015 Paris, France; Paris Descartes University, 75006 Paris, France; Inserm UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 31432 Toulouse, France.
| | - Alexandre Zhao
- Cardiology Department, Hôpital Européen Georges-Pompidou, 75015 Paris, France; Paris Descartes University, 75006 Paris, France
| | - Eloi Marijon
- Adult Congenital Heart Disease Unit, Centre de Référence des Malformations Cardiaques Congénitales Complexes (M3C), 75015 Paris, France; Cardiology Department, Hôpital Européen Georges-Pompidou, 75015 Paris, France; Paris Descartes University, 75006 Paris, France; Inserm U970, Paris Centre de Recherche Cardiovasculaire, 75015 Paris, France
| | - Magalie Ladouceur
- Adult Congenital Heart Disease Unit, Centre de Référence des Malformations Cardiaques Congénitales Complexes (M3C), 75015 Paris, France; Cardiology Department, Hôpital Européen Georges-Pompidou, 75015 Paris, France; Paris Descartes University, 75006 Paris, France; Inserm U970, Paris Centre de Recherche Cardiovasculaire, 75015 Paris, France
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15
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Attard C, Huang J, Monagle P, Ignjatovic V. Pathophysiology of thrombosis and anticoagulation post Fontan surgery. Thromb Res 2018; 172:204-213. [PMID: 29685556 DOI: 10.1016/j.thromres.2018.04.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 04/05/2018] [Accepted: 04/11/2018] [Indexed: 01/19/2023]
Abstract
The Fontan procedure has transformed the lives of children born with single-ventricle physiology, previously deemed inoperable. Worldwide, there are an increasing number of children with Fontan circulation, with the potential for survival into adulthood. Due to the abnormal circulation, Fontan patients have an increased risk of thromboembolic (TE) events, with up to 25% of events leading to death. Despite the importance of preventing TE events in this patient population, there is currently no clinical consensus on the optimal monitoring, thromboprophylaxis therapies, and treatment of these events. This paper reviews the available literature regarding anticoagulation in the pediatric and adult Fontan population, including the mechanisms for thrombosis and current antithrombotic therapies.
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Affiliation(s)
- Chantal Attard
- Murdoch Children's Research Institute, Haematology Research Group, Parkville, Victoria, Australia; Royal Children's Hospital, Department of Clinical Haematology, Parkville, Victoria, Australia; The University of Melbourne, Department of Paediatrics, Parkville, Victoria, Australia.
| | - Joanna Huang
- Murdoch Children's Research Institute, Haematology Research Group, Parkville, Victoria, Australia; Royal Children's Hospital, Department of Clinical Haematology, Parkville, Victoria, Australia; Monash University, School of Clinical Sciences, Clayton, Victoria, Australia
| | - Paul Monagle
- Murdoch Children's Research Institute, Haematology Research Group, Parkville, Victoria, Australia; Royal Children's Hospital, Department of Clinical Haematology, Parkville, Victoria, Australia; The University of Melbourne, Department of Paediatrics, Parkville, Victoria, Australia
| | - Vera Ignjatovic
- Murdoch Children's Research Institute, Haematology Research Group, Parkville, Victoria, Australia; Royal Children's Hospital, Department of Clinical Haematology, Parkville, Victoria, Australia
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Diagnosis and Management of Noncardiac Complications in Adults With Congenital Heart Disease: A Scientific Statement From the American Heart Association. Circulation 2017; 136:e348-e392. [DOI: 10.1161/cir.0000000000000535] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Life expectancy and quality of life for those born with congenital heart disease (CHD) have greatly improved over the past 3 decades. While representing a great advance for these patients, who have been able to move from childhood to successful adult lives in increasing numbers, this development has resulted in an epidemiological shift and a generation of patients who are at risk of developing chronic multisystem disease in adulthood. Noncardiac complications significantly contribute to the morbidity and mortality of adults with CHD. Reduced survival has been documented in patients with CHD with renal dysfunction, restrictive lung disease, anemia, and cirrhosis. Furthermore, as this population ages, atherosclerotic cardiovascular disease and its risk factors are becoming increasingly prevalent. Disorders of psychosocial and cognitive development are key factors affecting the quality of life of these individuals. It is incumbent on physicians who care for patients with CHD to be mindful of the effects that disease of organs other than the heart may have on the well-being of adults with CHD. Further research is needed to understand how these noncardiac complications may affect the long-term outcome in these patients and what modifiable factors can be targeted for preventive intervention.
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Towards the goal of achieving a normal duration and quality of life after Fontan operation: Creation of the International Fontan Interest group (I-FIG), an international collaborative initiative dedicated to improving outcomes. Int J Cardiol 2017; 245:131-134. [DOI: 10.1016/j.ijcard.2017.05.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/08/2017] [Indexed: 11/23/2022]
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Itani M, Matesan M, Ahuja J, Bermo M, Habib AS, Goiney C, Krieger EV, Vesselle H. The Role of Pulmonary Scintigraphy in the Evaluation of Adults with Congenital Heart Disease. Semin Nucl Med 2017; 47:660-670. [PMID: 28969764 DOI: 10.1053/j.semnuclmed.2017.07.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Adults with congenital heart disease represent a growing population with challenging and complex medical management. Pulmonary scintigraphy can play a valuable role in the evaluation and care of this patient population. We present a review of the variety of clinical scenarios where pulmonary scintigraphy can be helpful in the evaluation of adults with congenital heart disease, along with technical considerations associated with these studies.
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Affiliation(s)
- Malak Itani
- Department of Radiology, Division of Nuclear Medicine, University of Washington, Seattle, WA.
| | - Manuela Matesan
- Department of Radiology, Division of Nuclear Medicine, University of Washington, Seattle, WA
| | - Jitesh Ahuja
- Department of Radiology, Division of Nuclear Medicine, University of Washington, Seattle, WA
| | - Mohamed Bermo
- Department of Radiology, Division of Nuclear Medicine, University of Washington, Seattle, WA
| | - Asma S Habib
- Department of Medicine, Division of Cardiology, University of Washington, Seattle, WA
| | - Christopher Goiney
- Department of Radiology, Division of Nuclear Medicine, University of Washington, Seattle, WA
| | - Eric V Krieger
- Department of Medicine, Division of Cardiology, University of Washington, Seattle, WA
| | - Hubert Vesselle
- Department of Radiology, Division of Nuclear Medicine, University of Washington, Seattle, WA
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Abstract
PURPOSE OF REVIEW Hypoplastic left heart syndrome (HLHS) is characterized by underdevelopment of the mitral valve, left ventricle, and aorta and is ultimately palliated with a single-ventricle repair. Universally fatal in infancy prior to the advent of modern surgical techniques, the majority of HLHS patients will now reach adulthood. However, despite improvements in early survival, the HLHS population continues to face significant morbidity and early mortality. This review delineates common sources of patient morbidity and highlights areas in need of additional research for this growing segment of the adult congenital heart disease population. RECENT FINDINGS It has become increasingly clear that palliated adult single ventricle patients, like those with HLHS, face significant life-long morbidity from elevated systemic venous pressures as a consequence of the Fontan procedure. Downstream organ dysfunction secondary to elevated Fontan pressures has the potential to significantly impact long-term management decisions, including strategies of organ allocation. Because of the presence of a morphologic systemic right ventricle, HLHS patients may be at even higher risk than other adult patients with a Fontan. Because the adult HLHS population continues to grow, recognition of common sources of patient morbidity and mortality is becoming increasingly important. A coordinated effort between patients and providers is necessary to address the many remaining areas of clinical uncertainty to help ensure continued improvement in patient prognosis and quality of life.
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Texter K, Davis JAM, Phelps C, Cheatham S, Cheatham J, Galantowicz M, Feltes TF. Building a comprehensive team for the longitudinal care of single ventricle heart defects: Building blocks and initial results. CONGENIT HEART DIS 2017; 12:403-410. [DOI: 10.1111/chd.12459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/20/2017] [Accepted: 02/21/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Karen Texter
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
- Department of Pediatrics; The Ohio State University; Columbus Ohio USA
| | - Jo Ann M. Davis
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
| | - Christina Phelps
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
- Department of Pediatrics; The Ohio State University; Columbus Ohio USA
| | - Sharon Cheatham
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
- Department of Pediatrics; The Ohio State University; Columbus Ohio USA
| | - John Cheatham
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
- Department of Pediatrics; The Ohio State University; Columbus Ohio USA
| | - Mark Galantowicz
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
- Division of Cardiothoracic Surgery; Nationwide Children's Hospital; Columbus Ohio USA
| | - Timothy F. Feltes
- Division of Cardiology; Nationwide Children's Hospital; Columbus Ohio USA
- Department of Pediatrics; The Ohio State University; Columbus Ohio USA
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Cardiopulmonary exercise test in adults with prior Fontan operation: The prognostic value of serial testing. Int J Cardiol 2017; 235:6-10. [DOI: 10.1016/j.ijcard.2017.02.140] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 02/09/2017] [Accepted: 02/27/2017] [Indexed: 11/17/2022]
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Egbe AC, Connolly HM, Niaz T, Yogeswaran V, Taggart NW, Qureshi MY, Poterucha JT, Khan AR, Driscoll DJ. Prevalence and outcome of thrombotic and embolic complications in adults after Fontan operation. Am Heart J 2017; 183:10-17. [PMID: 27979032 DOI: 10.1016/j.ahj.2016.09.014] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 09/06/2016] [Indexed: 11/15/2022]
Abstract
There are limited studies of thrombotic and embolic complications (TEC) in the adult Fontan population. The purpose of the study was to determine the prevalence, risk factors, and outcomes of TECs in this population. METHODS Retrospective review of adults with a previous Fontan operation, with follow-up at Mayo Clinic, 1994-2014. Systemic TEC was defined as intracardiac thrombus, ischemic stroke, or systemic arterial embolus. Nonsystemic TEC was defined as Fontan conduit/right atrial thrombus or pulmonary embolus. RESULTS We identified 387 patients with a mean (SD) age of 28 (7) years and a mean follow-up of 8 (2) years. An atriopulmonary connection (APC) was done for 286 patients (74%). Atrial arrhythmias were present in 278 (72%). There were 121 TECs (systemic n=36, nonsystemic n=85) in 98 patients (25%). Risk factors for systemic TEC were atrial arrhythmia (hazard ratio 2.28, P=.001) and APC (hazard ratio 1.98, P=.02); nonsystemic TEC also had similar risk factors. All 98 patients received warfarin. Warfarin was discontinued in 10 of 98 because of bleeding, and 8 of these 10 subsequently had a second TEC. Among the 82 patients who had follow-up imaging, 16 (20%) had resolution of thrombus. In total, 24 of 98 patients had a second TEC, most of whom had inadequate anticoagulation. CONCLUSIONS Thrombotic and embolic complication was not uncommon; risk factors for TEC were APC and atrial arrhythmias. Most patients were treated successfully with warfarin alone. A second TEC occurred in most patients whose anticoagulation was discontinued because of bleeding events.
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Affiliation(s)
- Alexander C Egbe
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN.
| | | | - Talha Niaz
- Department of Pediatric, Mayo Clinic, Rochester, MN
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Egbe AC, Connolly HM, Dearani JA, Bonnichsen CR, Niaz T, Allison TG, Johnson JN, Poterucha JT, Said SM, Ammash NM. When is the right time for Fontan conversion? The role of cardiopulmonary exercise test. Int J Cardiol 2016; 220:564-8. [DOI: 10.1016/j.ijcard.2016.06.209] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/23/2016] [Accepted: 06/25/2016] [Indexed: 11/29/2022]
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Abstract
This review attempts to answer the common questions faced by a clinician regarding thromboembolism and thromboprophylaxis in patients following Fontan surgery. The review is in an easy to understand question and answer format and discusses the currently available literature on the subject in an attempt to arrive at practical clinically relevant solutions. Patients who have undergone the Fontan operation are at a high risk for thromboembolism. Based on available evidence, there is a strong rationale for thromboprophylaxis. However, it is not clear as to which agent should be administered to prevent thromboembolic events. While the available evidence suggests that antiplatelet agents alone may be as good as oral anticoagulants, there is a need for a large multicenter randomized control trial comparing these two common strategies to deliver a clear verdict.
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Affiliation(s)
- Sangeetha Viswanathan
- Department of Paediatric Cardiology, SRM Institute of Medical Sciences, Chennai, Tamil Nadu, India
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Egbe AC, Connolly HM, McLeod CJ, Ammash NM, Niaz T, Yogeswaran V, Poterucha JT, Qureshi MY, Driscoll DJ. Thrombotic and Embolic Complications Associated With Atrial Arrhythmia After Fontan Operation. J Am Coll Cardiol 2016; 68:1312-9. [DOI: 10.1016/j.jacc.2016.06.056] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 05/25/2016] [Accepted: 06/21/2016] [Indexed: 10/21/2022]
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Abstract
OBJECTIVES The objective of this article is to review the particular tendencies as well as specific concerns of bleeding and clotting in children with critical cardiac disease. DATA SOURCE MEDLINE and PubMed. CONCLUSION Children with critical heart disease are at particular risk for bleeding and clotting secondary to intrinsic as well as extrinsic factors. We hope that this review will aid the clinician in managing the unique challenges of bleeding and clotting in this patient population, and serve as a springboard for much needed research in this area.
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Egbe AC, Connolly HM, Niaz T, McLeod CJ. Outcome of direct current cardioversion for atrial arrhythmia in adult Fontan patients. Int J Cardiol 2016; 208:115-9. [DOI: 10.1016/j.ijcard.2016.01.209] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 01/16/2016] [Accepted: 01/22/2016] [Indexed: 10/22/2022]
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Bonnichsen C, Ammash N. Choosing Between MRI and CT Imaging in the Adult with Congenital Heart Disease. Curr Cardiol Rep 2016; 18:45. [DOI: 10.1007/s11886-016-0717-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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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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Kutty S, Rathod RH, Danford DA, Celermajer DS. Role of imaging in the evaluation of single ventricle with the Fontan palliation. Heart 2015; 102:174-83. [PMID: 26567230 DOI: 10.1136/heartjnl-2015-308298] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 10/08/2015] [Indexed: 12/29/2022] Open
Abstract
The Fontan operation for single ventricle palliation consists of the creation of a complete cavopulmonary connection, usually by incorporating inferior vena caval flow into a pulmonary arterial circulation already receiving flow from the superior vena cava. In single ventricle palliated in this way, the anatomy is complex, and the pathophysiological complications are frequent; so, cardiac imaging is a key aspect of clinical surveillance. Common problems that echocardiography and MRI may disclose and characterise in the Fontan palliation of single ventricle include obstruction of systemic venous and pulmonary arterial flow, atrioventricular and semilunar valve dysfunction, unintended collateral flow patterns, ventricular dysfunction, aortic arch obstruction, interatrial obstruction, fenestration flow and patch leaks. Despite the broad scope of these modalities for detection of such problems, often no single imaging method is comprehensive in any given patient. Therefore, physicians must recognise the limitations of each modality, and circumvent these by application of suitable alternatives. New imaging tools are becoming available, which may ultimately prove to be of value in the Fontan circulation. Proper application of diverse new technologies such as four dimensional flow, computational fluid dynamics and three-dimensional printing will require critical evaluation in the single ventricle population.
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Affiliation(s)
- Shelby Kutty
- Division of Pediatric Cardiology, University of Nebraska College of Medicine, Children's Hospital & Medical Center, Omaha, Nebraska, USA
| | - Rahul H Rathod
- Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts, USA Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - David A Danford
- Division of Pediatric Cardiology, University of Nebraska College of Medicine, Children's Hospital & Medical Center, Omaha, Nebraska, USA
| | - David S Celermajer
- Faculty of Medicine, Sydney Medical School, University of Sydney, Sydney, Australia Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia
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Computed Tomography Imaging in Patients with Congenital Heart Disease Part I: Rationale and Utility. An Expert Consensus Document of the Society of Cardiovascular Computed Tomography (SCCT). J Cardiovasc Comput Tomogr 2015; 9:475-92. [DOI: 10.1016/j.jcct.2015.07.004] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/17/2015] [Indexed: 12/16/2022]
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Nakano T, Kado H, Tatewaki H, Hinokiyama K, Oda S, Ushinohama H, Sagawa K, Nakamura M, Fusazaki N, Ishikawa S. Results of extracardiac conduit total cavopulmonary connection in 500 patients. Eur J Cardiothorac Surg 2015; 48:825-32; discussion 832. [PMID: 25769469 DOI: 10.1093/ejcts/ezv072] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Accepted: 12/29/2014] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES This single-institution study aimed to evaluate the early to mid-term outcomes of extracardiac conduit total cavopulmonary connection (EC-TCPC). METHODS Between March 1994 and March 2014, 500 patients (median age, 3.4 years) underwent EC-TCPC at our hospital. One hundred and twenty-three patients (24.6%) showed heterotaxy, and fenestration was created in 6 patients (1.2%). The standard institutional treatment policy included postoperative anticoagulation and individualized cardiovascular medication. The mortality and morbidity rates, haemodynamic status, cardiopulmonary exercise capacity and liver examination results during the follow-up period (median, 6.7 years) were retrospectively reviewed. RESULTS There were 2 early and 17 late deaths. The Kaplan-Meier estimated survival rate was 96.2% at 10 years and 92.8% at 15 years. Bradyarrhythmia and tachyarrhythmia occurred in 19 and 13 patients, respectively. Other late-occurring morbidities included protein-losing enteropathy in 8, thromboembolism in 5, bleeding complications in 6 and liver cirrhosis in 1 patient. The rate of freedom from late-occurring morbidities was 82.1% at 15 years. In the multivariate analysis, heterotaxy was found to be a predictor for mortality (P = 0.02), whereas age at operation was a predictor for new-onset arrhythmias (P = 0.048). In the cardiopulmonary exercise test (n = 312), the peak VO2 was 84.9 ± 17.3% of the predicted value, which tended to decrease with age (R(2) = 0.32) and elapsed time since operation (R(2) = 0.21). Postoperative cardiac catheterization (n = 468; time from surgery, 3.6 ± 4.3 years) showed central venous pressure of 9.9 ± 2.4 mmHg, ventricular end-diastolic pressure of 5.2 ± 3.3 mmHg, cardiac index of 3.4 ± 0.8 l/min/m(2) and arterial oxygen saturation of 94.2 ± 4.8%. In 101 patients who were followed up for ≥10 years, amino-terminal type III procollagen peptide and collagen type IV levels exceeded the normal ranges in 52.9 and 75.2% of patients, respectively, and liver ultrasonography revealed hyper-echoic spots in 43.3% of patients. CONCLUSIONS The early to mid-term outcomes of post-EC-TCPC patients managed with individualized pharmacotherapy were excellent, with low mortality and morbidity rates; however, development of late-occurring morbidities specific to Fontan physiology, including exercise intolerance and liver disease, must be carefully monitored during the long-term follow-up.
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Affiliation(s)
- Toshihide Nakano
- Department of Cardiovascular Surgery, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Hideaki Kado
- Department of Cardiovascular Surgery, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Hideki Tatewaki
- Department of Cardiovascular Surgery, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Kazuhiro Hinokiyama
- Department of Cardiovascular Surgery, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Shinichiro Oda
- Department of Cardiovascular Surgery, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Hiroya Ushinohama
- Department of Cardiology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Koichi Sagawa
- Department of Cardiology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Makoto Nakamura
- Department of Cardiology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Naoki Fusazaki
- Department of Neonatal Cardiology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Shiro Ishikawa
- Department of Cardiology, Fukuoka Children's Hospital, Fukuoka, Japan
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Affiliation(s)
- Jack Rychik
- From the Division of Cardiology, Children's Hospital of Philadelphia, Philadelphia, PA (J.R., D.J.G.); Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA (J.R., D.J.G.).
| | - David J Goldberg
- From the Division of Cardiology, Children's Hospital of Philadelphia, Philadelphia, PA (J.R., D.J.G.); Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA (J.R., D.J.G.)
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Two cases of warfarin-induced tracheobronchial calcification after Fontan surgery. Pediatr Cardiol 2014; 35:954-8. [PMID: 24584210 DOI: 10.1007/s00246-014-0880-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 02/04/2014] [Indexed: 10/25/2022]
Abstract
This study identified tracheobronchial cartilage calcification in children with congenital heart disease. Calcification of the tracheobronchial airways has been found previously in adults receiving warfarin and in children receiving warfarin after mitral valve replacement. A 9-year-old girl who had received a Fontan repair 6 years previously underwent a cardiac computed tomography (CT) scan to evaluate pulmonary artery size. The result was an incidental finding of extensive tracheobronchial cartilage calcification. A retrospective review of all pediatric Fontan patients who had undergone cardiac CT was conducted to search for calcification of the tracheobronchial cartilage. The study investigated ten pediatric Fontan patients who had undergone cardiac CT scanning. Two patients with extensive calcification of the tracheobronchial airways were identified. The index case had hypoplastic left heart syndrome, and the patient had undergone a staged repair with the Fontan at the age of 3 years. A 16-year-old boy with tricuspid atresia had undergone staged repair and Fontan at the age of 3.5 years. These two patients had received continuous warfarin therapy for 6 and 13 years, respectively. Other common causes of airway calcification were excluded from the study. This report describes warfarin-induced tracheobronchial calcification in patients after the Fontan procedure. This finding has possible implications for airway growth and vascular calcification.
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Tomkiewicz-Pajak L, Hoffman P, Trojnarska O, Lipczyńska M, Podolec P, Undas A. Abnormalities in blood coagulation, fibrinolysis, and platelet activation in adult patients after the Fontan procedure. J Thorac Cardiovasc Surg 2014; 147:1284-90. [DOI: 10.1016/j.jtcvs.2013.06.011] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 05/23/2013] [Accepted: 06/14/2013] [Indexed: 01/19/2023]
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Giglia TM, Massicotte MP, Tweddell JS, Barst RJ, Bauman M, Erickson CC, Feltes TF, Foster E, Hinoki K, Ichord RN, Kreutzer J, McCrindle BW, Newburger JW, Tabbutt S, Todd JL, Webb CL. Prevention and Treatment of Thrombosis in Pediatric and Congenital Heart Disease. Circulation 2013; 128:2622-703. [DOI: 10.1161/01.cir.0000436140.77832.7a] [Citation(s) in RCA: 202] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Han BK, Lesser JR. CT imaging in congenital heart disease: An approach to imaging and interpreting complex lesions after surgical intervention for tetralogy of Fallot, transposition of the great arteries, and single ventricle heart disease. J Cardiovasc Comput Tomogr 2013; 7:338-53. [DOI: 10.1016/j.jcct.2013.10.003] [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: 08/16/2013] [Revised: 10/16/2013] [Accepted: 10/30/2013] [Indexed: 01/25/2023]
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Potter BJ, Leong-Sit P, Fernandes SM, Feifer A, Mayer JE, Triedman JK, Walsh EP, Landzberg MJ, Khairy P. Effect of Aspirin and warfarin therapy on thromboembolic events in patients with univentricular hearts and Fontan palliation. Int J Cardiol 2013; 168:3940-3. [DOI: 10.1016/j.ijcard.2013.06.058] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Accepted: 06/29/2013] [Indexed: 10/26/2022]
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Hong H, Dur O, Zhang H, Zhu Z, Pekkan K, Liu J. Fontan conversion templates: patient-specific hemodynamic performance of the lateral tunnel versus the intraatrial conduit with fenestration. Pediatr Cardiol 2013; 34:1447-54. [PMID: 23475255 DOI: 10.1007/s00246-013-0669-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 02/11/2013] [Indexed: 11/25/2022]
Abstract
Intraatrial-conduit Fontan is considered a modification of both extracardiac and lateral-tunnel Fontan. In this study, the patient-specific hemodynamic performance of intraatrial-conduit and lateral-tunnel Fontan with fenestration, considered as conversion templates, was investigated based on the authors' patient cohort. Pulsatile computational fluid dynamics simulations were performed using patient-specific models of intraatrial-conduit and lateral-tunnel Fontan patients. Real-time "simultaneous" inferior and superior vena cava, pulmonary artery, and fenestration flow waveforms were acquired from ultrasound. Multiple hemodynamic performance indices were investigated, with particular focus on evaluation of the pulsatile flow performance. Power loss inside the lateral-tunnel Fontan appeared to be significantly higher than with the intraatrial-conduit Fontan for patient-specific cardiac output and normalized connection size. Inclusion of the 4-mm fenestration at a 0.24 L/min mean flow resulted in a lower cavopulmonary pressure gradient and less time-averaged power loss for both Fontan connections. Flow structures within the intraatrial conduit were notability more uniform than within the lateral tunnel. Hepatic flow majorly favored the left lung in both surgical connections: conversion from lateral-tunnel to intraatrial-conduit Fontan resulted in better hemodynamics with less power loss, a lower pressure gradient, and fewer stagnant flow zones along the conduit. This patient-specific computational case study demonstrated superior hemodynamics of intraatrial-conduit Fontan over those of lateral-tunnel Fontan with or without fenestration and improved performance after conversion of the lateral tunnel to the intraatrial conduit. The geometry-specific effect of the nonuniform hepatic flow distribution may motivate new rationales for the surgical design.
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Affiliation(s)
- Haifa Hong
- The Cardiothoracic Surgery Department, Shanghai Children's Medical Center, Medical School Shanghai Jiaotong University, 1678 Dongfang Road, Shanghai 200127, China
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Abstract
The Fontan procedure is used to treat various serious congenital heart defects. Although many people who have had the procedure live productively into adulthood, as they age, they face several health issues due to the physiology of the Fontan circulation. This article reviews the 4 types of Fontan procedures and the changes caused by the surgery, including single-ventricle physiology, nonpulsatile pulmonary perfusion, systemic venous hypertension, and intracardiac scarring, as well as their sequelae. Key nursing assessment items and possible treatment strategies are reviewed. Additional topics, including pregnancy in patients who have undergone the procedure, infective endocarditis prophylaxis, and health-related quality of life, are briefly discussed. Options for Fontan failure, including Fontan conversion or transplantation, are presented. Potential future solutions are outlined.
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Affiliation(s)
- Marion E. McRae
- Marion E. McRae is Nurse Practitioner-Congenital Heart Program, Advanced Health Sciences Pavilion, A3400-03 Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048 ( or )
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Han BK, Lesser JR. Cardiac CT in the Diagnosis and Postoperative Assessment of Congenital Heart Disease. CURRENT CARDIOVASCULAR IMAGING REPORTS 2013. [DOI: 10.1007/s12410-013-9195-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Pathophysiology of chronic venous insufficiency in adults with a Fontan circulation (a pre-defined substudy of the CALF investigation). Int J Cardiol 2013; 165:41-5. [DOI: 10.1016/j.ijcard.2011.07.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 07/14/2011] [Indexed: 11/18/2022]
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43
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Idorn L, Jensen AS, Juul K, Reimers JI, Johansson PI, Sørensen KE, Ostrowski SR, Søndergaard L. Thromboembolic complications in Fontan patients: population-based prevalence and exploration of the etiology. Pediatr Cardiol 2013; 34:262-72. [PMID: 22843202 DOI: 10.1007/s00246-012-0431-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 06/29/2012] [Indexed: 01/13/2023]
Abstract
After the Fontan procedure, patients face an increased risk for thromboembolic events (TE). The etiology for this increased thrombogenecity is incompletely understood. This study aimed to determine the prevalence of TE in Danish Fontan patients and to bring new insights into the etiology of TE. Using a population-based design, we retrospectively identified all TEs in 210 Fontan patients. Whole blood assays (thromboelastography, thromboelastography functional fibrinogen and Multiplate) reflecting global hemostasis, clot strength and platelet aggregation were analyzed prospectively in 112 patients and plasma was analyzed in 76 patients for biomarkers reflecting endothelial-, glycocalyx-, platelet-, and fibrinolysis function (histone-complexed DNA fragments, Protein C, soluble CD40 ligand, soluble thrombomodulin, syndecan-1, tissue-type plasminogen activator). The results were compared in groups stratified according to age, antithrombotic therapy, TE, and glycocalyx degradation (syndecan-1 < or ≥ median). Correlation between biomarkers and demographic-, anatomical-, clinical- and biochemical parameters was investigated. The prevalence of TE was 8.1 % after a mean follow-up of 8.4 years. None of the stratified groups demonstrated evidence of hypercoagulability in the whole blood assays and no unexpected significant differences were found between the groups. All biomarkers, except protein C, correlated with one another and after stratification of glycocalyx degradation only syndecan-1 levels ≥ median correlated with other biomarkers. The prevalence of TEs was 8.1 % after mean follow-up of 8.4 years. Overall, the hemostatic profile appeared normal, however, in a subset of patients, evidence of some endothelial activation/damage including glycocalyx degradation and fibrinolysis was found, identifying a potentially more thrombogenic group.
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Affiliation(s)
- L Idorn
- Department of Cardiology, Rigshospitalet, Blegdamsvej 9, Section 2014, 2100 Copenhagen, Denmark.
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McCrindle BW, Manlhiot C, Cochrane A, Roberts R, Hughes M, Szechtman B, Weintraub R, Andrew M, Monagle P. Factors Associated With Thrombotic Complications After the Fontan Procedure. J Am Coll Cardiol 2013; 61:346-53. [DOI: 10.1016/j.jacc.2012.08.1023] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 07/24/2012] [Accepted: 08/13/2012] [Indexed: 01/19/2023]
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45
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Manlhiot C, Brandão LR, Kwok J, Kegel S, Menjak IB, Carew CL, Chan AK, Schwartz SM, Sivarajan VB, Caldarone CA, Van Arsdell GS, McCrindle BW. Thrombotic complications and thromboprophylaxis across all three stages of single ventricle heart palliation. J Pediatr 2012; 161:513-519.e3. [PMID: 22513267 DOI: 10.1016/j.jpeds.2012.03.004] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 01/30/2012] [Accepted: 03/02/2012] [Indexed: 01/19/2023]
Abstract
OBJECTIVES To describe the incidence of thrombotic complications across all 3 stages of single ventricle palliation and the association between thromboprophylaxis use and thrombotic risk. STUDY DESIGN Two separate cross-sectional studies were performed that included 195 patients born between 2003-2008 and 162 patients who underwent Fontan after 2000. RESULTS The incidence of thrombotic complications was 40% and 28% after initial palliation and superior cavopulmonary connection (SCPC), respectively; 5-year freedom from thrombotic complications after Fontan was 79%. Thromboprophylaxis was initiated for 70%, 46%, and 94% of patients after initial palliation, SCPC, and Fontan, respectively. Thromboprophylaxis with enoxaparin (vs no thromboprophylaxis) was associated with a reduction in risk of thrombotic complications after initial palliation (hazard ratio [HR] 0.5, P = .05) and SCPC (HR 0.2, P = .04). Thromboprophylaxis with warfarin was associated with a reduction in thrombotic complications after Fontan (HR 0.27, P = .05 vs acetylsalicylic acid; HR 0.18, P = .02 vs no thromboprophylaxis). Thrombotic complications were associated with increased mortality after initial palliation (HR 5.5, P < .001) and SCPC (HR 12.5, P < .001). Three patients experienced major bleeding complications without permanent sequelae (2 enoxaparin, 1 warfarin). CONCLUSIONS Given the negative impact of thrombotic complications on survival, the low risk of serious bleeding complications, and the association between thromboprophylaxis and lowered thrombotic complication risk across all 3 palliative stages, routine use of thromboprophylaxis from the initial palliation to the early post-Fontan period in this population may be indicated.
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Affiliation(s)
- Cedric Manlhiot
- Labatt Family Heart Centre, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
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Grewal J, Al Hussein M, Feldstein J, Kiess M, Ellis J, Human D, Leipsic J. Evaluation of Silent Thrombus after the Fontan Operation. CONGENIT HEART DIS 2012; 8:40-7. [DOI: 10.1111/j.1747-0803.2012.00699.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/09/2012] [Indexed: 01/05/2023]
Affiliation(s)
- Jasmine Grewal
- Division of Cardiology, St. Paul's Hospital; University of British Columbia; Vancouver; BC; Canada
| | - Mosaad Al Hussein
- Division of Cardiology, St. Paul's Hospital; University of British Columbia; Vancouver; BC; Canada
| | - Jaimee Feldstein
- Division of Cardiology, St. Paul's Hospital; University of British Columbia; Vancouver; BC; Canada
| | - Marla Kiess
- Division of Cardiology, St. Paul's Hospital; University of British Columbia; Vancouver; BC; Canada
| | - Jennifer Ellis
- Department of Radiology, St. Paul's Hospital; University of British Columbia; Vancouver; BC; Canada
| | - Derek Human
- Division of Cardiology, St. Paul's Hospital; University of British Columbia; Vancouver; BC; Canada
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47
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Ramirez-Marroquin S, Calderón-Colmenero J, Curi-Curi P, García-Montes JA, Patiño-Bahena E, Buendía A, Sandoval JP, Cervantes-Salazar J. Fontan Procedure at 2,240 m Above Sea Level. World J Pediatr Congenit Heart Surg 2012; 3:206-13. [DOI: 10.1177/2150135111425065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The modified Fontan procedure represents the final stage of reconstructive surgery for most patients with functionally univentricular hearts. Although outcomes following Fontan procedures performed at sea level are widely reported, less has been documented and reported concerning outcomes in regions at high altitude. To clarify the main features involved, we present our institutional experience with Fontan operations performed in Mexico city (2,240 m above the sea level), with an emphasis on historical evolution of treatment. A retrospective and observational study was undertaken, which included 98 patients over a period of 18 years, and clinical outcomes in terms of morbidity and mortality were analyzed. A change in operative technique from intra-cardiac nonfenestrated Fontan procedure to extra-cardiac fenestrated technique occurred in 2001. Early mortality rates before and after this change in surgical approach were 26% and 4.7%, respectively. The most common morbidity was the occurrence of pleural effusions (98% of patients), which also appears to be a risk factor for operative mortality. Much remains unknown about the pathophysiology of the Fontan circulation at high altitude, and we need to develop morphological study protocols that include pulmonary biopsy to increase our knowledge and inform our therapeutic actions.
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Affiliation(s)
- Samuel Ramirez-Marroquin
- Department of Pediatric Cardiac and Congenital Heart Disease Surgery, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - Juan Calderón-Colmenero
- Department of Pediatric Cardiology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - Pedro Curi-Curi
- Department of Pediatric Cardiac and Congenital Heart Disease Surgery, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - José A. García-Montes
- Department of Pediatric Cardiology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - Emilia Patiño-Bahena
- Department of Pediatric Cardiology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - Alfonso Buendía
- Department of Pediatric Cardiology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - Juan Pablo Sandoval
- Department of Pediatric Cardiology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
| | - Jorge Cervantes-Salazar
- Department of Pediatric Cardiac and Congenital Heart Disease Surgery, Instituto Nacional de Cardiología Ignacio Chávez, Mexico D.F., Mexico
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Krieger EV, Valente AM, Landzberg MJ, Stout KK. Acute dyspnea in a young man with an old sternotomy. CONGENIT HEART DIS 2012; 7:E73-7. [PMID: 22471669 DOI: 10.1111/j.1747-0803.2012.00641.x] [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] [Indexed: 01/19/2023]
Abstract
Described is a 42-year-old man with complex congenital heart disease with single-ventricle physiology who underwent a Fontan operation at 27 years of age. He presented with sudden-onset chest pain and dyspnea and was initially misdiagnosed with a pulmonary embolism. This case is described in order to highlight the challenges in the evaluation of common presentations in adults with congenital heart disease.
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Affiliation(s)
- Eric V Krieger
- Division of Cardiology, Department of Medicine, University of Washington Medical Center, Seattle, WA 98195, USA.
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49
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Ciliberti P, Schulze-Neick I, Giardini A. Modulation of pulmonary vascular resistance as a target for therapeutic interventions in Fontan patients: focus on phosphodiesterase inhibitors. Future Cardiol 2012; 8:271-84. [DOI: 10.2217/fca.12.16] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Despite advancements in surgical techniques over the past 20 years, Fontan patients have decreased exercise capacity as a consequence of an inherent inability to adequately increase cardiac output during exercise. They are also affected by several complications that are associated with considerable morbidity and mortality. As the systemic and pulmonary circulations are placed in series without a subpulmonary ventricle propelling blood through the pulmonary vasculature, the systemic venous pressure and the respiratory mechanics are the only forces driving pulmonary blood flow. In Fontan circulation, pulmonary vascular resistance is the single most important factor involved in the limitation of cardiac output and treatments able to decrease pulmonary vascular resistance might conversely improve cardiac output and exercise capacity. In this article we discuss the initial experience with the use of sildenafil in Fontan patients and we discuss the possible mechanisms through which sildenafil might positively act in Fontan circulation.
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Affiliation(s)
- Paolo Ciliberti
- Cardiorespiratory Unit, Great Ormond Street Hospital for Children, Great Ormond Street, London WC1N 3JH, UK
| | - Ingram Schulze-Neick
- Cardiorespiratory Unit, Great Ormond Street Hospital for Children, Great Ormond Street, London WC1N 3JH, UK
| | - Alessandro Giardini
- Cardiorespiratory Unit, Great Ormond Street Hospital for Children, Great Ormond Street, London WC1N 3JH, UK
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50
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Sunidja AP, Prabhu SP, Lee EY, Sena L. 64-Row-MDCT Evaluation of Postoperative Congenital Heart Disease in Children: Review of Technique and Imaging Findings. Semin Roentgenol 2012; 47:66-78. [DOI: 10.1053/j.ro.2011.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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