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Handa K, Kawamura M, Yoshioka D, Saito S, Kawamura T, Kawamura A, Misumi Y, Taira M, Shimamura K, Komukai S, Kitamura T, Miyagawa S. Impact of the Aortomitral Positional Anatomy on Atrioventricular Conduction Disorder Following Mitral Valve Surgery. J Am Heart Assoc 2024; 13:e035826. [PMID: 39158546 DOI: 10.1161/jaha.124.035826] [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: 03/31/2024] [Accepted: 07/26/2024] [Indexed: 08/20/2024]
Abstract
BACKGROUND Variations in the aortomitral positional anatomy, including aortic root rotation appear to be related to variations in the location of the conduction system, including the bundle of His. However, little is known about their clinical significance. METHODS AND RESULTS This study included 147 patients with normal ECGs who underwent mitral valve surgery. The aortomitral anatomy was classified using preoperative 3-dimensional transesophageal echocardiography, and postoperative conduction disorders, including atrioventricular block and bundle branch block, were analyzed. Variations classified as aortomitral appearance were designated as having a center appearance (85.7%, n=126/147) or lateral appearance (14.3%, n=21/147) on the basis of whether the aortic root was located at the center or was shifted to the left fibrous trigone side. Subsequently, those with a center appearance, aortic root rotation was classified as having a center rotation (83.3% [n=105/126]), in which the commissure of the left and noncoronary aortic leaflet was located at the center, lateral rotation (14.3% [n=18/126]), rotated to the left trigone side, or medial rotation (2.4% [n=3/126]), rotated to the right. The incidence of 3-month persistent new-onset conduction disorder was higher in the lateral appearance than the center appearance group (21.1% versus 5.0%; P=0.031) and higher in the lateral rotation than in the center or medial rotation groups (29.4% versus 1.0% versus 0.0%, respectively; P<0.001). CONCLUSIONS Aortomitral variations can be classified using 3-dimensional transesophageal echocardiography. Lateral appearance and lateral rotation are risk factors for conduction disorders in mitral valve surgery.
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Affiliation(s)
- Kazuma Handa
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Masashi Kawamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Daisuke Yoshioka
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Shunsuke Saito
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Takuji Kawamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Ai Kawamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Yusuke Misumi
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Masaki Taira
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Kazuo Shimamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Sho Komukai
- Department of Integrated Medicine, Institute of Biomedical Statistics, Osaka University Graduate School of Medicine Osaka Japan
| | - Tetsuhisa Kitamura
- Department of Social and Environmental Medicine Osaka University Graduate School of Medicine Osaka Japan
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
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Macé LG, Fringand T, Cheylan I, Sabatier L, Meille L, Lenoir M, Favier J. Three-dimensional modelling of aortic leaflet coaptation and load-bearing surfaces: in silico design of aortic valve neocuspidizations. INTERDISCIPLINARY CARDIOVASCULAR AND THORACIC SURGERY 2024; 39:ivae108. [PMID: 38830038 PMCID: PMC11246164 DOI: 10.1093/icvts/ivae108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 04/30/2024] [Accepted: 05/30/2024] [Indexed: 06/05/2024]
Abstract
OBJECTIVES Three-dimensional (3D) modelling of aortic leaflets remains difficult due to insufficient resolution of medical imaging. We aimed to model the coaptation and load-bearing surfaces of the aortic leaflets and adapt this workflow to aid in the design of aortic valve neocuspidizations. METHODS Geometric morphometrics, using landmarks and semilandmarks, was applied to the geometric determinants of the aortic leaflets from computed tomography, followed by an isogeometric analysis using Non-Uniform Rational Basis Splines (NURBS). Ten aortic valve models were generated, measuring determinants of leaflet geometry defined as 3D NURBS curves, and leaflet coaptation and load-bearing surfaces were defined as 3D NURBS surfaces. Neocuspidizations were obtained by either shifting the upper central coaptation landmark towards the sinotubular junction or using parametric neo-landmarks placed on a centreline drawn between the centroid of the aortic root base and centroid of a circle circumscribing the 3 upper commissural landmarks. RESULTS The ratio of the leaflet free margin length to the geometric height was 1.83, whereas the ratio of the commissural coaptation height to the central coaptation height was 1.93. The median coaptation surface was 137 mm2 (IQR 58) and the median load-bearing surface was 203 mm2 (60) per leaflet. Neocuspidization multiplied the central coaptation height by 3.7 and the coaptation surfaces by 1.97 and 1.92 using the native coaptation axis and centroid coaptation axis, respectively. CONCLUSIONS Geometric morphometrics reliably defined the coaptation and load-bearing surfaces of aortic leaflets, enabling an experimental 3D design for the in silico neocuspidization of aortic valves.
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Affiliation(s)
- Loïc Georges Macé
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, Aix Marseille Univ, Marseille, France
- Aix Marseille Univ, CNRS, Centrale Med, M2P2, Marseille, France
| | - Tom Fringand
- Aix Marseille Univ, CNRS, Centrale Med, M2P2, Marseille, France
| | | | | | - Laurent Meille
- Cardiovascular Department, Clinique Rhône Durance, Avignon, France
| | - Marien Lenoir
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, Aix Marseille Univ, Marseille, France
- Aix Marseille Univ, CNRS, Centrale Med, M2P2, Marseille, France
| | - Julien Favier
- Aix Marseille Univ, CNRS, Centrale Med, M2P2, Marseille, France
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Burbano-Vera NH, Alfirevic A, Bauer AM, Wakefield BJ, Najm HK, Roselli EE, Tretter JT. Perioperative Assessment of the Hemodynamic Ventriculoarterial Junction of the Aortic Root by Three-Dimensional Echocardiography. J Am Soc Echocardiogr 2024; 37:626-633. [PMID: 38336021 DOI: 10.1016/j.echo.2024.01.015] [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: 04/25/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024]
Abstract
Improved strategies in aortic valve-preserving operations appreciate the dynamic, three-dimensional complexity of the aortic root and its valve. This depends not only on detailed four-dimensional imaging of the planar dimensions of the aortic root but also on quantitative assessment of the valvar leaflets and their competency. The zones of apposition and resulting hemodynamic ventriculoarterial junction formed in diastole determine valvar competency. Current understanding and assessment of this junction is limited, often relying on intraoperative direct surgical inspection. However, this direct inspection itself is limited by evaluation in a nonhemodynamic state with limited field of view. In this review, we discuss the anatomy of the aortic root, including its hemodynamic junction. We review current echocardiographic approaches toward interrogating the incompetent aortic valve for presurgical planning. Furthermore, we introduce and standardize a complementary approach to assessing this hemodynamic ventriculoarterial junction by three-dimensional echocardiography to further personalize presurgical planning for aortic valve surgery.
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Affiliation(s)
- Nelson H Burbano-Vera
- Anesthesiology Institute, Department of Cardiothoracic Anesthesiology, Cleveland Clinic, Cleveland, Ohio; Anesthesiology Institute, Department of Pediatric Anesthesiology, Division of Pediatric Cardiac Anesthesiology, Cleveland Clinic, Cleveland, Ohio.
| | - Andrej Alfirevic
- Anesthesiology Institute, Department of Cardiothoracic Anesthesiology, Cleveland Clinic, Cleveland, Ohio
| | - Andrew M Bauer
- Anesthesiology Institute, Department of Cardiothoracic Anesthesiology, Cleveland Clinic, Cleveland, Ohio
| | - Brett J Wakefield
- Anesthesiology Institute, Department of Cardiothoracic Anesthesiology, Cleveland Clinic, Cleveland, Ohio
| | - Hani K Najm
- Congenital Valve Procedural Planning Program, Department of Pediatric Cardiology and Division of Pediatric Cardiac Surgery, Cleveland Clinic Children's, and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio; Heart, Vascular and Thoracic Institute, Department of Cardiovascular Surgery, Cleveland Clinic, Cleveland, Ohio
| | - Eric E Roselli
- Heart, Vascular and Thoracic Institute, Department of Cardiovascular Surgery, Cleveland Clinic, Cleveland, Ohio
| | - Justin T Tretter
- Congenital Valve Procedural Planning Program, Department of Pediatric Cardiology and Division of Pediatric Cardiac Surgery, Cleveland Clinic Children's, and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
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4
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Crucean A, Spicer DE, Tretter JT, Mohun TJ, Anderson RH. Revisiting the anatomy of the right ventricle in the light of knowledge of its development. J Anat 2024; 244:297-311. [PMID: 37814425 PMCID: PMC10780169 DOI: 10.1111/joa.13960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 10/11/2023] Open
Abstract
Controversies continue regarding several aspects of the anatomy of the morphologically right ventricle. There is disagreement as to whether the ventricle should be assessed in bipartite or tripartite fashion, and the number of leaflets to be found in the tricuspid valve. In particular, there is no agreement as to whether a muscular outlet septum is present in the normally constructed heart, nor how many septal components are to be found during normal development. Resolving these issues is of potential significance to those investigating and treating children with congenitally malformed hearts. With all these issues in mind, we have revisited our own experience in investigating the development and morphology of the normal right ventricle. To assess development, we have examined a large number of datasets, prepared by both standard and episcopic microscopy, from human and murine embryos. In terms of gross anatomy, we have compared dissections of normal autopsied hearts with virtual dissections of datasets prepared using computed tomography. Our developmental and postnatal studies, taken together, confirm that the ventricle is best assessed in tripartite fashion, with the three parts representing its inlet, apical trabecular, and outlet components. The ventricular septum, however, has only muscular and membranous components. The muscular part incorporates a small component derived from the muscularised fused proximal outflow cushions, but this part cannot be distinguished from the much larger part that is incorporated within the free-standing muscular infundibular sleeve. We confirm that the tricuspid valve itself has three components, which are located inferiorly, septally, and antero-superiorly.
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Affiliation(s)
- Adrian Crucean
- Department of Paediatric Cardiac SurgeryBirmingham Women's and Children's HospitalBirminghamUK
| | - Diane E. Spicer
- Congenital Heart CenterAll Children's HospitalSt PetersbergFloridaUSA
| | - Justin T. Tretter
- Department of Pediatric Cardiology, Cleveland Clinic Children's, and the Heart, Vascular, and Thoracic InstituteCleveland ClinicClevelandOhioUSA
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5
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Kelly Han B, Binka E, Griffiths E, Hobbs R, Eckhauser A, Husain A, Overman D. Left Ventricular Outflow Tract Obstruction in Congenital Heart Disease: The Role of Cardiovascular Computed Tomography in Surgical Decision Making. Semin Thorac Cardiovasc Surg Pediatr Card Surg Annu 2023; 27:11-18. [PMID: 38522866 DOI: 10.1053/j.pcsu.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/17/2023] [Accepted: 12/02/2023] [Indexed: 03/26/2024]
Abstract
Patients with many forms of congenital heart disease (CHD) and hypertrophic cardiomyopathy undergo surgical intervention to relieve left ventricular outflow tract obstruction (LVOTO). Cardiovascular Computed Tomography (CCT) defines the complex pathway from the ventricle to the outflow tract and can be visualized in 2D, 3D, and 4D (3D in motion) to help define the mechanism and physiologic significance of obstruction. Advanced cardiac visualization may aid in surgical planning to relieve obstruction in the left ventricular outflow tract, aortic or neo-aortic valve and the supravalvular space. CCT scanner technology has advanced to achieve submillimeter, isotropic spatial resolution, temporal resolution as low as 66 msec allowing high-resolution imaging even at the fast heart rates and small cardiac structures of pediatric patients ECG gating techniques allow radiation exposure to be targeted to a minimal portion of the cardiac cycle for anatomic imaging, and pulse modulation allows cine imaging with a fraction of radiation given during most of the cardiac cycle, thus reducing radiation dose. Scanning is performed in a single heartbeat or breath hold, minimizing the need for anesthesia or sedation, for which CHD patents are highest risk for an adverse event. Examples of visualization of complex left ventricular outflow tract obstruction in the subaortic, valvar and supravalvular space will be highlighted, illustrating the novel applications of CCT in this patient subset.
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Affiliation(s)
- B Kelly Han
- Division of Pediatric Cardiology, Primary Children's Hospital, University of Utah, Salt Lake City, Utah.
| | - Edem Binka
- Division of Pediatric Cardiology, Primary Children's Hospital, University of Utah, Salt Lake City, Utah
| | - Eric Griffiths
- Division of Cardiothoracic Surgery, Primary Children's Hospital, University of Utah, Salt Lake City, Utah
| | - Reilly Hobbs
- Division of Cardiothoracic Surgery, Primary Children's Hospital, University of Utah, Salt Lake City, Utah
| | - Aaron Eckhauser
- Division of Cardiothoracic Surgery, Primary Children's Hospital, University of Utah, Salt Lake City, Utah
| | - Adil Husain
- Division of Cardiothoracic Surgery, Primary Children's Hospital, University of Utah, Salt Lake City, Utah
| | - David Overman
- Division of Cardiovascular Surgery, Children's Minnesota, Mayo Clinic-Children's Minnesota Cardiovascular Collaborative, Minnesota
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Tucker DL, Lee LJ, Ahmad M, Shaheen N, Gupta S, Najm HK, Hammoud MS, Tretter JT, Karamlou T. Surgical strategies to address re-operative complex left ventricular outflow tract and thoracic aortic pathology: Cleveland Clinic children's experience. Cardiol Young 2023; 33:2559-2566. [PMID: 37013896 DOI: 10.1017/s1047951122003936] [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] [Indexed: 04/05/2023]
Abstract
BACKGROUND Complex patients requiring operations on the left ventricular outflow tract, aortic valve, or thoracic aorta after previous repair of aortopathy constitute a challenging group, with limited information guiding decision-making. We aimed to use our institutional experience to highlight management challenges and describe surgical pearls to address them. METHODS Forty-one complex patients with surgery on the left ventricular outflow tract, aortic valve, or aorta at Cleveland Clinic Children's between 2016 and 2021 following previous repair of aortic pathology were retrospectively reviewed. Patients with known connective tissue disease or single ventricle circulation were excluded. RESULTS Median age at index procedure was 23 years (range 0.25-48) with median of 2 prior sternotomies. Previous aortic operations included subvalvular (n = 9), valvular (n = 6), supravalvular (n = 13), and multi-level surgeries (n = 13). Four deaths occurred in median follow-up of 2.5 years. Mean left ventricular outflow tract gradients improved significantly for patients with obstruction (34.9 ± 17.5 mmHg versus 12.6 ± 6.0 mmHg; p < 0.001). Technical pearls include the following: 1) liberal use of anterior aortoventriculoplasty with valve replacement; 2) primarily anterior aortoventriculoplasty following the subpulmonary conus in contrast to more vertical incision for post-arterial switch operation patients; 3) pre-operative imaging of mediastinum and peripheral vasculature for cannulation and sternal re-entry; and 4) proactive use of multi-site peripheral cannulation. CONCLUSIONS Operation to address the left ventricular outflow tract, aortic valve, or aorta following prior congenital aortic repair can be accomplished with excellent outcomes despite high complexity. These procedures commonly include multiple components, including concomitant valve interventions. Cannulation strategies and anterior aortoventriculoplasty in specific patients require modifications.
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Affiliation(s)
- Dominique L Tucker
- Department of Thoracic and Cardiothoracic Surgery, Cleveland Clinic, Cleveland, OH, USA
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Leah J Lee
- Department of Thoracic and Cardiothoracic Surgery, Cleveland Clinic, Cleveland, OH, USA
| | - Munir Ahmad
- Division of Pediatric Cardiac Surgery and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Naseeb Shaheen
- Department of Thoracic and Cardiothoracic Surgery, Cleveland Clinic, Cleveland, OH, USA
| | - Sohini Gupta
- Department of Thoracic and Cardiothoracic Surgery, Cleveland Clinic, Cleveland, OH, USA
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Hani K Najm
- Division of Pediatric Cardiac Surgery and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Miza Salim Hammoud
- Division of Pediatric Cardiac Surgery and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Justin T Tretter
- Department of Pediatric Cardiology, Cleveland Clinic Children's, and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Tara Karamlou
- Division of Pediatric Cardiac Surgery and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
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7
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Vijayaraman P, Chelu MG, Curila K, Dandamudi G, Herweg B, Mori S, Jastrzebski M, Sharma PS, Shivkumar K, Tung R, Upadhyay G, Vernooy K, Welter-Frost A, Whinnett Z, Zanon F, Ellenbogen KA. Cardiac Conduction System Pacing: A Comprehensive Update. JACC Clin Electrophysiol 2023; 9:2358-2387. [PMID: 37589646 DOI: 10.1016/j.jacep.2023.06.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/10/2023] [Accepted: 06/02/2023] [Indexed: 08/18/2023]
Abstract
The field of cardiac pacing has changed rapidly in the last several years. Since the initial description of His bundle pacing targeting the conduction system, recent advances in pacing the left bundle branch and its fascicles have evolved. The field and investigators' knowledge of conduction system pacing including relevant anatomy and physiology has advanced significantly. The aim of this review is to provide a comprehensive update on recent advances in conduction system pacing.
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Affiliation(s)
- Pugazhendhi Vijayaraman
- Geisinger Heart Institute, Geisinger Commonwealth School of Medicine, Wilkes-Barre, Pennsylvania, USA.
| | - Mihal G Chelu
- Division of Cardiology, Baylor College of Medicine and Baylor St. Luke's Medical Center and Texas Heart Institute, Houston, Texas, USA
| | - Karol Curila
- Cardiocenter, Third Faculty of Medicine, Charles University and University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Gopi Dandamudi
- Virginia Mason Franciscan Health, Seattle, Washington, USA
| | - Bengt Herweg
- University of South Florida Morsani College of Medicine, Department of Cardiovascular Sciences, Tampa, Florida, USA
| | - Shumpei Mori
- University of California Los Angeles (UCLA) Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Marek Jastrzebski
- First Department of Cardiology, Interventional Electrocardiology and Hypertension, Jagiellonian University, Medical College, Krakow, Poland
| | - Parikshit S Sharma
- Department of Cardiology, Rush University School of Medicine, Chicago, Illinois, USA
| | - Kalyanam Shivkumar
- University of California Los Angeles (UCLA) Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Roderick Tung
- Division of Cardiology, University of Arizona College of Medicine-Phoenix, Banner-University Medical Center, Phoenix, Arizona, USA
| | - Gaurav Upadhyay
- Department of Cardiology, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Kevin Vernooy
- Center for Arrhythmia Care, Heart and Vascular Center, University of Chicago, Chicago, Illinois, USA
| | - Allan Welter-Frost
- Cleveland Clinic Indian River Hospital, Heart Vascular and Thoracic Institute, Vero Beach, Florida, USA
| | - Zachary Whinnett
- National Heart and Lung Institute, Imperial College, London, United Kingdom
| | | | - Kenneth A Ellenbogen
- Division of Cardiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
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8
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Sundström E, Tretter JT. Impact of Variation in Commissural Angle between Fused Leaflets in the Functionally Bicuspid Aortic Valve on Hemodynamics and Tissue Biomechanics. Bioengineering (Basel) 2023; 10:1219. [PMID: 37892949 PMCID: PMC10604894 DOI: 10.3390/bioengineering10101219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
In subjects with functionally bicuspid aortic valves (BAVs) with fusion between the coronary leaflets, there is a natural variation of the commissural angle. What is not fully understood is how this variation influences the hemodynamics and tissue biomechanics. These variables may influence valvar durability and function, both in the native valve and following repair, and influence ongoing aortic dilation. A 3D aortic valvar model was reconstructed from a patient with a normal trileaflet aortic valve using cardiac magnetic resonance (CMR) imaging. Fluid-structure interaction (FSI) simulations were used to compare the effects of the varying commissural angles between the non-coronary with its adjacent coronary leaflet. The results showed that the BAV with very asymmetric commissures (120∘ degree commissural angle) reduces the aortic opening area during peak systole and with a jet that impacts on the right posterior wall proximally of the ascending aorta, giving rise to elevated wall shear stress. This manifests in a shear layer with a retrograde flow and strong swirling towards the fused leaflet side. In contrast, a more symmetrical commissural angle (180∘ degree commissural angle) reduces the jet impact on the posterior wall and leads to a linear decrease in stress and strain levels in the non-fused non-coronary leaflet. These findings highlight the importance of considering the commissural angle in the progression of aortic valvar stenosis, the regional distribution of stresses and strain levels experienced by the leaflets which may predispose to valvar deterioration, and progression in thoracic aortic dilation in patients with functionally bicuspid aortic valves. Understanding the hemodynamics and biomechanics of the functionally bicuspid aortic valve and its variation in structure may provide insight into predicting the risk of aortic valve dysfunction and thoracic aortic dilation, which could inform clinical decision making and potentially lead to improved aortic valvar surgical outcomes.
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Affiliation(s)
- Elias Sundström
- Department of Engineering Mechanics, Flow Research Center, KTH Royal Institute of Technology, Teknikringen 8, 100 44 Stockholm, Sweden
| | - Justin T. Tretter
- Congenital Valve Procedural Planning Center, Department of Pediatric Cardiology and Division of Pediatric Cardiac Surgery, Cleveland Clinic Children’s, and The Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH 44195, USA;
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9
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Djordjevic A, Rudez I. Aortic Valve Repair and Early-Career Surgeons-Nothing Is Impossible. J Cardiovasc Dev Dis 2023; 10:284. [PMID: 37504540 PMCID: PMC10380622 DOI: 10.3390/jcdd10070284] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 06/25/2023] [Indexed: 07/29/2023] Open
Abstract
Aortic valve repair with either the reimplantation of the aortic valve or aortic root remodelling with the external annuloplasty procedure is the most effective means of treating aortic regurgitation and/or aortic root aneurysms [...].
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Affiliation(s)
- Anze Djordjevic
- Department of Cardiac Surgery, University Medical Centre Maribor, 2000 Maribor, Slovenia
| | - Igor Rudez
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, 10000 Zagreb, Croatia
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10
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Tretter JT, Spicer DE, Franklin RCG, Béland MJ, Aiello VD, Cook AC, Crucean A, Loomba RS, Yoo SJ, Quintessenza JA, Tchervenkov CI, Jacobs JP, Najm HK, Anderson RH. Expert Consensus Statement: Anatomy, Imaging, and Nomenclature of Congenital Aortic Root Malformations. Cardiol Young 2023; 33:1060-1068. [PMID: 37288941 DOI: 10.1017/s1047951123001233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Over the past 2 decades, several categorizations have been proposed for the abnormalities of the aortic root. These schemes have mostly been devoid of input from specialists of congenital cardiac disease. The aim of this review is to provide a classification, from the perspective of these specialists, based on an understanding of normal and abnormal morphogenesis and anatomy, with emphasis placed on the features of clinical and surgical relevance. We contend that the description of the congenitally malformed aortic root is simplified when approached in a fashion that recognizes the normal root to be made up of 3 leaflets, supported by their own sinuses, with the sinuses themselves separated by the interleaflet triangles. The malformed root, usually found in the setting of 3 sinuses, can also be found with 2 sinuses, and very rarely with 4 sinuses. This permits description of trisinuate, bisinuate, and quadrisinuate variants, respectively. This feature then provides the basis for classification of the anatomical and functional number of leaflets present. By offering standardized terms and definitions, we submit that our classification will be suitable for those working in all cardiac specialties, whether pediatric or adult. It is of equal value in the settings of acquired or congenital cardiac disease. Our recommendations will serve to amend and/or add to the existing International Paediatric and Congenital Cardiac Code, along with the Eleventh iteration of the International Classification of Diseases provided by the World Health Organization.
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Affiliation(s)
- Justin T Tretter
- Department of Pediatric Cardiology, Cleveland Clinic Children's and The Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Diane E Spicer
- Heart Institute, Johns Hopkins All Children's Hospital, St Petersburg, Florida
- Congenital Heart Center, UF Health Shands Hospital, Division of Cardiovascular Surgery, Departments of Surgery and Pediatrics, University of Florida, Gainesville, Florida
| | - Rodney C G Franklin
- Paediatric Cardiology Department, Royal Brompton & Harefield National Health Service Trust, London, United Kingdom
| | - Marie J Béland
- Division of Pediatric Cardiology, The Montreal Children's Hospital of the McGill University Health Centre, Montréal, Québec, Canada
| | - Vera D Aiello
- Heart Institute (InCor), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Andrew C Cook
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Adrian Crucean
- Department of Paediatric Cardiac Surgery, Birmingham Women's and Children's Hospital, Birmingham, United Kingdom
| | - Rohit S Loomba
- Division of Cardiology, Advocate Children's Hospital, Oak Lawn, Illinois
| | - Shi-Joon Yoo
- Division of Cardiology, Department of Pediatrics, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - Christo I Tchervenkov
- Division of Cardiovascular Surgery, The Montreal Children's Hospital of the McGill University Health Centre, Montréal, Québec, Canada
| | - Jeffrey P Jacobs
- Congenital Heart Center, UF Health Shands Hospital, Division of Cardiovascular Surgery, Departments of Surgery and Pediatrics, University of Florida, Gainesville, Florida
| | - Hani K Najm
- Division of Pediatric Cardiac Surgery, Cleveland Clinic Children's and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Robert H Anderson
- Cardiovascular Research Centre, Biosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
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11
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Tretter JT, Spicer DE, Franklin RCG, Béland MJ, Aiello VD, Cook AC, Crucean A, Loomba RS, Yoo SJ, Quintessenza JA, Tchervenkov CI, Jacobs JP, Najm HK, Anderson RH. Expert Consensus Statement: Anatomy, Imaging, and Nomenclature of Congenital Aortic Root Malformations. Ann Thorac Surg 2023; 116:6-16. [PMID: 37294261 DOI: 10.1016/j.athoracsur.2023.03.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/03/2023] [Accepted: 03/15/2023] [Indexed: 06/10/2023]
Abstract
Over the past 2 decades, several categorizations have been proposed for the abnormalities of the aortic root. These schemes have mostly been devoid of input from specialists of congenital cardiac disease. The aim of this review is to provide a classification, from the perspective of these specialists, based on an understanding of normal and abnormal morphogenesis and anatomy, with emphasis placed on the features of clinical and surgical relevance. We contend that the description of the congenitally malformed aortic root is simplified when approached in a fashion that recognizes the normal root to be made up of 3 leaflets, supported by their own sinuses, with the sinuses themselves separated by the interleaflet triangles. The malformed root, usually found in the setting of 3 sinuses, can also be found with 2 sinuses, and very rarely with 4 sinuses. This permits description of trisinuate, bisinuate, and quadrisinuate variants, respectively. This feature then provides the basis for classification of the anatomical and functional number of leaflets present. By offering standardized terms and definitions, we submit that our classification will be suitable for those working in all cardiac specialties, whether pediatric or adult. It is of equal value in the settings of acquired or congenital cardiac disease. Our recommendations will serve to amend and/or add to the existing International Paediatric and Congenital Cardiac Code, along with the Eleventh iteration of the International Classification of Diseases provided by the World Health Organization.
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Affiliation(s)
- Justin T Tretter
- Department of Pediatric Cardiology, Cleveland Clinic Children's and The Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio.
| | - Diane E Spicer
- Heart Institute, Johns Hopkins All Children's Hospital, St Petersburg, Florida; Congenital Heart Center, UF Health Shands Hospital, Division of Cardiovascular Surgery, Departments of Surgery and Pediatrics, University of Florida, Gainesville, Florida
| | - Rodney C G Franklin
- Paediatric Cardiology Department, Royal Brompton & Harefield National Health Service Trust, London, United Kingdom
| | - Marie J Béland
- Division of Pediatric Cardiology, The Montreal Children's Hospital of the McGill University Health Centre, Montréal, Québec, Canada
| | - Vera D Aiello
- Heart Institute (InCor), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Andrew C Cook
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Adrian Crucean
- Department of Paediatric Cardiac Surgery, Birmingham Women's and Children's Hospital, Birmingham, United Kingdom
| | - Rohit S Loomba
- Division of Cardiology, Advocate Children's Hospital, Oak Lawn, Illinois
| | - Shi-Joon Yoo
- Division of Cardiology, Department of Pediatrics, Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - Christo I Tchervenkov
- Division of Cardiovascular Surgery, The Montreal Children's Hospital of the McGill University Health Centre, Montréal, Québec, Canada
| | - Jeffrey P Jacobs
- Congenital Heart Center, UF Health Shands Hospital, Division of Cardiovascular Surgery, Departments of Surgery and Pediatrics, University of Florida, Gainesville, Florida
| | - Hani K Najm
- Division of Pediatric Cardiac Surgery, Cleveland Clinic Children's and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Robert H Anderson
- Cardiovascular Research Centre, Biosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
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12
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Tretter JT, Spicer DE, Macías Y, Talbott C, Kasten JL, Sánchez-Quintana D, Kapadia SR, Anderson RH. Vulnerability of the ventricular conduction axis during transcatheter aortic valvar implantation: A translational pathologic study. Clin Anat 2023. [PMID: 36864653 DOI: 10.1002/ca.24032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/01/2023] [Indexed: 03/04/2023]
Abstract
The ventricular components of the conduction axis remain vulnerable following transcatheter aortic valvar replacement. We aimed to describe features which may be used accurately by interventionalists to predict the precise location of the conduction axis, hoping better to avoid conduction disturbances. We scanned eight normal adult heart specimens by 3T magnetic resonance, using the images to simulate histological sections in order accurately to place the conduction axis back within the heart. We then used histology, tested in two pediatric hearts, to prepare sections, validated by the magnetic resonance images, to reveal the key relationships between the conduction axis and the aortic root. The axis was shown to have a close relationship to the nadir of the right coronary leaflet, in particular when the aortic root was rotated in counterclockwise fashion. The axis was more vulnerable in the setting of a narrow inferoseptal recess, when the inferior margin of the membranous septum was above the plane of the virtual basal ring, and when minimal myocardium was supporting the right coronary sinus. The features identified in our study are in keeping with the original description provided by Tawara, but at variance with more recent accounts. They suggest that the vulnerability of the axis during transcatheter valvar replacement can potentially be inferred on the basis of knowledge of the position of the aortic root within the ventricular base. If validated by clinical studies, our findings may better permit avoidance of new-onset left bundle branch block following transcatheter aortic valvar replacement.
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Affiliation(s)
- Justin T Tretter
- Department of Pediatric Cardiology, Cleveland Clinic Children's, and Cardiovascular Medicine Department, The Heart, Vascular, & Thoracic Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA.,Heart Institute, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Diane E Spicer
- Heart Institute, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, USA.,Congenital Heart Center, UF Health Shands Hospital, Division of Cardiovascular Surgery, Departments of Surgery and Pediatrics, University of Florida, Gainesville, Florida, USA
| | - Yolanda Macías
- Department of Medical and Surgical Therapeutics, Faculty of Veterinary, University of Extremadura, Cáceres, Spain
| | - Cheryl Talbott
- Department of Pathology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jennifer L Kasten
- Department of Pathology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Damián Sánchez-Quintana
- Department of Human Anatomy and Cell Biology, Faculty of Medicine, University of Extremadura, Badajoz, Spain
| | - Samir R Kapadia
- Cardiovascular Medicine Department, Heart, Vascular & Thoracic Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Robert H Anderson
- Biosciences Institute, Newcastle University, Newcastle-upon-Tyne, UK
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13
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Dudkiewicz D, Zhingre Sanchez JD, Hołda J, Bolechała F, Strona M, Kopacz P, Iaizzo PA, Koziej M, Hołda MK, Konieczyńska M. Aortic valve fenestrations: Macroscopic assessment and functional anatomy study. Clin Anat 2023; 36:612-617. [PMID: 36597994 DOI: 10.1002/ca.24002] [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: 06/21/2022] [Revised: 12/23/2022] [Accepted: 12/23/2022] [Indexed: 01/05/2023]
Abstract
Aortic valve fenestrations are defined as a loss of aortic valve leaflet tissue. They are a common but overlooked finding with unclear significance. The aim of this study was to investigate the varied functional anatomies of aortic valve fenestrations. A total of 400 formalin-fixed autopsied human hearts were macroscopically assessed and the function of the aortic valve of 16 reanimated human hearts were imaged using Visible Heart® methodologies. Aortic valve leaflet fenestrations were present in 43.0% of autopsied hearts (in one leaflet in 24.0%, in two leaflets 16.0%, in all leaflets 3.0%). Fenestrations were mostly present in left (25.5%) followed by right (23.3%) and noncoronary leaflet (16.3%). In 93.8% of cases, the fenestrations form clusters and were mainly located at the free edge of the leaflet in the commissural area (95.4%). Hearts with aortic valve fenestrations had significantly larger aortic valve diameters and aortic valve areas (p < 0.001). The average surface area sizes of fenestrations were 23.8 ± 16.6 mm2 , and the areas were largest for left followed by right and noncoronary leaflet fenestrations (p < 0.001). The fenestration areas positively correlated with donor age (r = 0.31; p = 0.02). Significant hypermobility and subjective weakening of the leaflet adhesion levels of the fenestrated regions were observed. In conclusion, fenestrations of the aortic leaflets are frequent, and their sizes may be significant. They occur in all age groups, yet their size increase with aging. Fragments of leaflets with fenestrations show different behaviors during the cardiac cycle versus unchanged areas.
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Affiliation(s)
- Damian Dudkiewicz
- HEART - Heart Embryology and Anatomy Research Team, Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland
| | - Jorge D Zhingre Sanchez
- Visible Heart® Laboratories, Departments of Biomedical Engineering and Surgery, Institute for Engineering in Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jakub Hołda
- HEART - Heart Embryology and Anatomy Research Team, Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland
| | - Filip Bolechała
- Department of Forensic Medicine, Jagiellonian University Medical College, Cracow, Poland
| | - Marcin Strona
- Department of Forensic Medicine, Jagiellonian University Medical College, Cracow, Poland
| | - Paweł Kopacz
- Department of Forensic Medicine, Jagiellonian University Medical College, Cracow, Poland
| | - Paul A Iaizzo
- Visible Heart® Laboratories, Departments of Biomedical Engineering and Surgery, Institute for Engineering in Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mateusz Koziej
- HEART - Heart Embryology and Anatomy Research Team, Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland
| | - Mateusz K Hołda
- HEART - Heart Embryology and Anatomy Research Team, Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland.,Department of Diagnostic Medicine, John Paul II Hospital, Kraków, Poland.,Division of Cardiovascular Sciences, The University of Manchester, Manchester, UK
| | - Małgorzata Konieczyńska
- Department of Diagnostic Medicine, John Paul II Hospital, Kraków, Poland.,Department of Thromboembolic Diseases, Jagiellonian University Medical College, Cracow, Poland
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14
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Williams TR, Cianciulli AR, Wang Y, Lasso A, Pinter C, Pouch AM, Biko DM, Nuri M, Quartermain MD, Rogers LS, Chen JM, Jolley MA. Truncal Valve Repair: 3-Dimensional Imaging and Modeling to Enhance Preoperative Surgical Planning. Circ Cardiovasc Imaging 2022; 15:e014424. [PMID: 36093770 PMCID: PMC9772078 DOI: 10.1161/circimaging.122.014424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Trevor R Williams
- Division of Cardiology (T.R.W., Y.W., M.D.Q., L.S.R., M.A.J.), Children's Hospital of Philadelphia, PA
| | - Alana R Cianciulli
- Department of Anesthesiology and Critical Care Medicine (A.R.C., M.A.J.), Children's Hospital of Philadelphia, PA
| | - Yan Wang
- Division of Cardiology (T.R.W., Y.W., M.D.Q., L.S.R., M.A.J.), Children's Hospital of Philadelphia, PA
| | - Andras Lasso
- Laboratory for Percutaneous Surgery, Queens University, Kingston, Ontario, Canada (A.L.)
| | | | - Alison M Pouch
- Departments of Radiology and Bioengineering, University of Pennsylvania, Philadelphia (A.M.P.)
| | - David M Biko
- Department of Radiology (D.M.B.), Children's Hospital of Philadelphia, PA
| | - Muhammad Nuri
- Division of Pediatric Cardiac Surgery (M.N., J.M.C.), Children's Hospital of Philadelphia, PA
| | - Michael D Quartermain
- Division of Cardiology (T.R.W., Y.W., M.D.Q., L.S.R., M.A.J.), Children's Hospital of Philadelphia, PA
| | - Lindsay S Rogers
- Division of Cardiology (T.R.W., Y.W., M.D.Q., L.S.R., M.A.J.), Children's Hospital of Philadelphia, PA
| | - Jonathan M Chen
- Division of Pediatric Cardiac Surgery (M.N., J.M.C.), Children's Hospital of Philadelphia, PA
| | - Matthew A Jolley
- Division of Cardiology (T.R.W., Y.W., M.D.Q., L.S.R., M.A.J.), Children's Hospital of Philadelphia, PA
- Department of Anesthesiology and Critical Care Medicine (A.R.C., M.A.J.), Children's Hospital of Philadelphia, PA
- Departments of Radiology and Bioengineering, University of Pennsylvania, Philadelphia (A.M.P.)
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15
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Tretter JT, Crotty EJ, Lehenbauer DG. 'Form fruste' Aortoventricular Tunnel: Preoperative Computed Tomographic Virtual Dissection Defines This Unusual Variant. Circ Cardiovasc Imaging 2022; 15:e014092. [PMID: 35862013 DOI: 10.1161/circimaging.122.014092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Justin T Tretter
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center (J.T.T.), Heart Institute, University of Cincinnati College of Medicine, OH
| | - Eric J Crotty
- Department of Radiology, Cincinnati Children's Hospital Medical Center, OH (E.J.C.)
| | - David G Lehenbauer
- Department of Surgery, Division of Cardiothoracic Surgery (D.G.L.), Heart Institute, University of Cincinnati College of Medicine, OH
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16
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Anderson RH, Spicer DE, Quintessenza JA, Najm HK, Tretter JT. Words and how we use them-Which is to be the master? J Card Surg 2022; 37:2481-2485. [PMID: 35705190 DOI: 10.1111/jocs.16620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Robert H Anderson
- Department of Cardiovascular Research Centre, Biosciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Diane E Spicer
- Department of Heart Institute, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, USA
| | - James A Quintessenza
- Department of Heart Institute, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, USA
| | - Hani K Najm
- Department of Pediatric Cardiac Surgery, Cleveland Clinic Children's, and The Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Justin T Tretter
- Department of Pediatric Cardiology, Cleveland Clinic Children's, and The Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
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17
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Izawa Y, Nishii T, Mori S. Stereogram of the Living Heart, Lung, and Adjacent Structures. Tomography 2022; 8:824-841. [PMID: 35314645 PMCID: PMC8938811 DOI: 10.3390/tomography8020068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/26/2022] [Accepted: 03/15/2022] [Indexed: 11/16/2022] Open
Abstract
Innovations in invasive cardiovascular diagnostics and therapeutics, not only limited to transcatheter approaches but also involving surgical approaches, are based on a precise appreciation of the three-dimensional living heart anatomy. Rapid advancements in three-dimensional cardiovascular imaging technologies in the 21st century have supported such innovations through the periprocedural assessment of the clinical anatomy of the living heart. However, even if high-resolution volume-rendered images are reconstructed, they cannot provide appropriate depth perception when displayed and shared on a two-dimensional display, which is widely used in clinical settings. Currently, images reconstructed from clinical datasets can visualize fine details of the cardiovascular anatomy. Therefore, this is an optimal time for cardiologists and cardiac surgeons to revisit the classic technology, stereopsis, and obtain bonus information from carefully reconstructed clinical images. Using anaglyphs or cross/uncross-fusion of paired images, striking depth perception can be readily obtained without the need for expensive equipment. This conventional technique, when applied to high-resolution volume-rendered images, may help in obtaining appropriate diagnostics, choosing optimal therapeutics, securing procedural success, and preventing complications. Furthermore, it can be used for anatomical education. In this review, we demonstrate multiple stereoscopic images reconstructed from cardiac computed tomographic datasets and discuss their clinical and educational implications.
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Affiliation(s)
- Yu Izawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo 650-0017, Japan;
| | - Tatsuya Nishii
- Department of Radiology, National Cerebral and Cardiovascular Center, Suita, Osaka 564-8565, Japan;
| | - Shumpei Mori
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
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18
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Tsuda D, Mori S, Izawa Y, Toh H, Suzuki M, Takahashi Y, Toba T, Fujiwara S, Tanaka H, Watanabe Y, Kono AK, Hirata KI. Diversity and determinants of the sigmoid septum and its impact on morphology of the outflow tract as revealed using cardiac computed tomography. Echocardiography 2022; 39:248-259. [PMID: 35038184 DOI: 10.1111/echo.15298] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 12/27/2021] [Accepted: 01/01/2022] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The sigmoid septum has been generally evaluated subjectively and qualitatively, without detailed examination of its diversity, impact on the morphology of the left ventricular outflow tract (LVOT), and anatomical background. METHODS We enrolled 100 patients without any background cardiac diseases (67.5 ± 12.8 years old; 43% women) who underwent cardiac computed tomography. Basal septal morphology was evaluated using antero-superior and medial bulging angles (bidirectional angulation of the basal septum relative to the LVOT). The eccentricity index of the LVOT, area narrowing ratio (LVOT/virtual basal ring area), aortic-to-left ventricular axial angle (angulation of the aortic root relative to the left ventricle), and wedged height (non-coronary aortic sinus to inferior epicardium distance) were also quantified. RESULTS The antero-superior bulging, medial bulging, aortic-to-left ventricular axial angles, LVOT eccentricity index, area narrowing ratio, and wedged height were 76° ± 17°, 166° ± 27°, 127° ± 9°, 1.8 ± 0.5, 1.0 ± 0.2, and 41.2 ± 9.1 mm, respectively. Both bulging angles were correlated with each other and contributed to the narrowing and deformation of the LVOT. Angulated aortic root was not correlated with either bidirectional septal bulge or LVOT narrowing. Clockwise rotation of the aortic root rotation was an independent predictor of prominent antero-superior septal bulge. Deeper aortic wedging was a common independent predictor of bidirectional septal bulge. CONCLUSIONS The extent of septal bulge varies in normal hearts. Along with deep aortic wedging, the bidirectional bulge of the basal septum deforms and narrows the LVOT without affecting the virtual basal ring morphology.
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Affiliation(s)
- Daisuke Tsuda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shumpei Mori
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Yu Izawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroyuki Toh
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Masataka Suzuki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yu Takahashi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takayoshi Toba
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Sei Fujiwara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hidekazu Tanaka
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshiaki Watanabe
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsushi K Kono
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ken-Ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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