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Chubb H, Mah D, Dubin AM, Moore J. Conduction system pacing in pediatric and congenital heart disease. Front Physiol 2023; 14:1154629. [PMID: 37035676 PMCID: PMC10080025 DOI: 10.3389/fphys.2023.1154629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/15/2023] [Indexed: 04/11/2023] Open
Abstract
Conduction system pacing (CSP) has evolved rapidly to become the pacing method of choice for many adults with structurally normal hearts. Studies in this population have repeatedly demonstrated superior hemodynamics and outcomes compared to conventional pacing with the recruitment of the native conduction system. Children and patients with congenital heart disease (CHD) are also likely to benefit from CSP but were excluded from original trials. However, very recent studies have begun to demonstrate the feasibility and efficacy of CSP in these patients, with growing evidence that some outcomes may be superior in comparison to conventional pacing techniques. Concerns regarding the technical challenges and long-term lead parameters of His Bundle Pacing (HBP) have been overcome to many extents with the development of Left Bundle Branch Area Pacing (LBBAP), and both techniques are likely to play an important role in pediatric and CHD pacing in the future. This review aims to assimilate the latest developments in CSP and its application in children and CHD patients.
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Affiliation(s)
- Henry Chubb
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University, Palo Alto, CA, United States
- *Correspondence: Henry Chubb,
| | - Douglas Mah
- Department of Cardiology, Boston Children’s Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA, United States
| | - Anne M. Dubin
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University, Palo Alto, CA, United States
| | - Jeremy Moore
- Division of Cardiology, Ahmanson/UCLA Adult Congenital Heart Disease Center, Department of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA, United States
- Cardiac Arrhythmia Center, David Geffen School of Medicine, University of California, Los Angeles, CA, United States
- Division of Cardiology, Department of Pediatrics, UCLA Medical Center, Los Angeles, CA, United States
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Moore BM, Cordina RL, McGuire MA, Celermajer DS. Adverse effects of amiodarone therapy in adults with congenital heart disease. CONGENIT HEART DIS 2018; 13:944-951. [PMID: 30239160 DOI: 10.1111/chd.12657] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/28/2018] [Accepted: 07/12/2018] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Amiodarone is a highly effective antiarrhythmic therapy, however its toxicity profile often limits treatment. This is particularly relevant in adults with congenital heart disease (CHD), who are often young and in whom other antiarrhythmic agents commonly fail or are contraindicated. We sought to determine incidence and predictors of adverse effects caused by amiodarone in adult CHD (ACHD). DESIGN A retrospective review of patients with moderate to complex ACHD treated with amiodarone at our center between 2000 and 2017 was performed. Incidence and predictors of adverse effects were described. Efficacy of amiodarone therapy in controlling the clinical arrhythmia was assessed as complete, partial, or failed. RESULTS Amiodarone was prescribed in 57 patients of 902 ACHD patients reviewed (6%), for a mean duration of 2.7 ± 4.3 years. Significant adverse effects occurred in 56%, most commonly thyroid dysfunction, with amiodarone-induced thyrotoxicosis (AIT) in 30% and amiodarone-induced hypothyroidism in 14%. AIT frequently led to arrhythmia exacerbation and occurred most in those with Fontan anatomy. Severe dermatological effects were seen in 7% and bradycardia requiring pacing in 5%. Interstitial lung disease, peripheral neuropathy and alopecia were observed in single cases. Amiodarone toxicity led to discontinuation of the drug in 42%. Amiodarone was highly effective when tolerated, however, achieving complete arrhythmia control in 63%, partial control in 35%, with failure to control in only one patient. CONCLUSIONS Amiodarone therapy is effective in moderate to complex ACHD patients, but is frequently limited by adverse effects. ACHD patients seem especially vulnerable to thyroid dysfunction, with Fontan patients in particular at increased risk of AIT.
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Affiliation(s)
- Benjamin M Moore
- Department of Cardiology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.,Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
| | - Rachael L Cordina
- Department of Cardiology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.,Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
| | - Mark A McGuire
- Department of Cardiology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.,Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
| | - David S Celermajer
- Department of Cardiology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.,Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
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Moore BM, Cordina RL, McGuire MA, Celermajer DS. Efficacy and adverse effects of sotalol in adults with congenital heart disease. Int J Cardiol 2018; 274:74-79. [PMID: 29954667 DOI: 10.1016/j.ijcard.2018.06.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/22/2018] [Accepted: 06/18/2018] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Adults with congenital heart disease (CHD) are predisposed to arrhythmias, which can often be refractory to medical therapy. Sotalol is an attractive alternative antiarrhythmic to amiodarone in this younger patient population, given the latter's toxicity profile, but it may have proarrhythmic effects. We therefore aimed to assess the efficacy and safety of sotalol in adults with CHD. METHODS We retrospectively assessed our adult CHD database for all patients ≥16 years old, with moderate to highly complex defects, who were prescribed sotalol between 2000 and 2017. Efficacy in treating the clinical arrhythmia was assessed as complete, partial or failure. Adverse effects, including proarrhythmia, were documented. RESULTS Sotalol was prescribed in 82 of 902 adult CHD patients reviewed (9%). The mean age at sotalol commencement was 31.8 ± 13.1 years, with a median time on sotalol of 2.8 years. The average prescribed dose was 122 ± 51 mg/daily. Sotalol was completely effective in 48% (n = 39), partially effective in 46% (n = 38) and failed to control the clinical arrhythmia in 6% (n = 5). Fifteen patients (18%) discontinued sotalol due to a side effect, most commonly fatigue or dyspnoea. No episodes of torsades de pointes or sudden cardiac death were observed. Significant bradycardia related to sotalol occurred in 13% (n = 11, with permanent pacing implemented in 4), and was associated with Fontan anatomy. CONCLUSIONS In moderate to highly complex adult CHD, sotalol was reasonably effective and safe in low doses. Side effects limiting treatment were typically non-life-threatening, with significant bradycardia related to sotalol more likely in Fontan patients.
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Affiliation(s)
- Benjamin M Moore
- University of Sydney Medical School and Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia
| | - Rachael L Cordina
- University of Sydney Medical School and Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia
| | - Mark A McGuire
- University of Sydney Medical School and Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia
| | - David S Celermajer
- University of Sydney Medical School and Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia.
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Williams SE, Linton NWF, Niederer S, O'Neill MD. Simultaneous display of multiple three-dimensional electrophysiological datasets (dot mapping). Europace 2018; 19:1743-1749. [PMID: 27702855 PMCID: PMC5834094 DOI: 10.1093/europace/euw190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/30/2016] [Indexed: 11/14/2022] Open
Abstract
Aims Complex ablation procedures are supported by accurate representation of an increasing variety of electrophysiological and imaging data within electroanatomic mapping systems (EMS). This study aims to develop a novel method for representing multiple complementary datasets on a single cardiac chamber model. Validation of the system and its application to both atrial and ventricular arrhythmias is examined. Methods and results Dot mapping was conceived to display multiple datasets by utilizing quantitative surface shading to represent one dataset and finely spaced dots to represent others. Dot positions are randomized within triangular (surface meshes) or tetrahedral (volumetric meshes) simplices making the approach directly transferrable to contemporary EMS. Test data representing uniform electrical activation (n = 10) and focal scarring (n = 10) were used to test dot mapping data perception accuracy. User experience of dot mapping with atrial and ventricular clinical data is evaluated. Dot mapping ensured constant screen dot density for regions of uniform dataset values, regardless of user manipulation of the cardiac chamber. Perception accuracy of dot mapping was equivalent to colour mapping for both propagation direction (1.5 ± 1.8 vs. 4.8 ± 5.3°, P = 0.24) and focal source localization (1.1 ± 0.7 vs. 1.4 ± 0.5 mm, P = 0.88). User acceptance testing revealed equivalent diagnostic accuracy and display fidelity when compared with colour mapping. Conclusion Dot mapping provides the unique ability to display multiple datasets from multiple sources on a single cardiac chamber model. The visual combination of multiple datasets may facilitate interpretation of complex electrophysiological and imaging data.
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Affiliation(s)
- Steven E Williams
- Division of Imaging Sciences and Biomedical Imaging, King's College London, 4th Floor, North Wing, St. Thomas' Hospital, 249 Westminster Bridge Road, London SE1 7EH, UK
| | - Nick W F Linton
- Division of Imaging Sciences and Biomedical Imaging, King's College London, 4th Floor, North Wing, St. Thomas' Hospital, 249 Westminster Bridge Road, London SE1 7EH, UK
| | - Steven Niederer
- Division of Imaging Sciences and Biomedical Imaging, King's College London, 4th Floor, North Wing, St. Thomas' Hospital, 249 Westminster Bridge Road, London SE1 7EH, UK
| | - Mark D O'Neill
- Division of Imaging Sciences and Biomedical Imaging, King's College London, 4th Floor, North Wing, St. Thomas' Hospital, 249 Westminster Bridge Road, London SE1 7EH, UK
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Mouws EM, de Groot NM. Atrial Tachyarrhythmia in Congenital Heart Disease. Circ Arrhythm Electrophysiol 2017; 10:CIRCEP.117.005697. [DOI: 10.1161/circep.117.005697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 08/24/2017] [Indexed: 11/16/2022]
Affiliation(s)
- Elisabeth M.J.P. Mouws
- From the Departments of Cardiothoracic Surgery (E.M.J.P.M.) and Cardiology (E.M.J.P.M., N.M.S.d.G.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Natasja M.S. de Groot
- From the Departments of Cardiothoracic Surgery (E.M.J.P.M.) and Cardiology (E.M.J.P.M., N.M.S.d.G.), Erasmus Medical Center, Rotterdam, The Netherlands
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Chubb H, Whitaker J, Williams SE, Head CE, Chung NA, Wright MJ, O'Neill M. Pathophysiology and Management of Arrhythmias Associated with Atrial Septal Defect and Patent Foramen Ovale. Arrhythm Electrophysiol Rev 2014; 3:168-72. [PMID: 26835086 DOI: 10.15420/aer.2014.3.3.168] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 11/11/2014] [Indexed: 11/04/2022] Open
Abstract
Atrial septal defects (ASDs) are among the most common of congenital heart defects and are frequently associated with atrial arrhythmias. Atrial and ventricular geometrical remodelling secondary to the intracardiac shunt promotes evolution of the electrical substrate, predisposing the patient to atrial fibrillation and other arrhythmias. Closure of an ASD reduces the immediate and long-term prevalence of atrial arrhythmias, but the evidence suggests that patients remain at an increased long-term risk in comparison with the normal population. The closure technique itself and its timing impacts future arrhythmia risk profile while subsequent transseptal access following surgical or device closure is complicated. Newer techniques combined with increased experience will help to alleviate some of the difficulties associated with optimal management of arrhythmias in these patients.
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Affiliation(s)
- Henry Chubb
- Division of Imaging Sciences and Biomedical Engineering, King's College London; Department of Paediatric Cardiology, Evelina London Children's Hospital
| | - John Whitaker
- Division of Imaging Sciences and Biomedical Engineering, King's College London
| | - Steven E Williams
- Division of Imaging Sciences and Biomedical Engineering, King's College London; Adult Congenital Heart Disease Group, Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust and Evelina London Children's Hospital, London, UK
| | - Catherine E Head
- Adult Congenital Heart Disease Group, Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust and Evelina London Children's Hospital, London, UK
| | - Natali Ay Chung
- Adult Congenital Heart Disease Group, Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust and Evelina London Children's Hospital, London, UK
| | - Matthew J Wright
- Division of Imaging Sciences and Biomedical Engineering, King's College London
| | - Mark O'Neill
- Division of Imaging Sciences and Biomedical Engineering, King's College London; Adult Congenital Heart Disease Group, Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust and Evelina London Children's Hospital, London, UK
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Images as drivers of progress in cardiac computational modelling. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2014; 115:198-212. [PMID: 25117497 PMCID: PMC4210662 DOI: 10.1016/j.pbiomolbio.2014.08.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 08/02/2014] [Indexed: 11/28/2022]
Abstract
Computational models have become a fundamental tool in cardiac research. Models are evolving to cover multiple scales and physical mechanisms. They are moving towards mechanistic descriptions of personalised structure and function, including effects of natural variability. These developments are underpinned to a large extent by advances in imaging technologies. This article reviews how novel imaging technologies, or the innovative use and extension of established ones, integrate with computational models and drive novel insights into cardiac biophysics. In terms of structural characterization, we discuss how imaging is allowing a wide range of scales to be considered, from cellular levels to whole organs. We analyse how the evolution from structural to functional imaging is opening new avenues for computational models, and in this respect we review methods for measurement of electrical activity, mechanics and flow. Finally, we consider ways in which combined imaging and modelling research is likely to continue advancing cardiac research, and identify some of the main challenges that remain to be solved.
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