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Carrasco M, Cabrito TMS, Montalbano MJ, Hołda MK, Walocha J, Tubbs RS, Loukas M. Cardiac ventricular false tendons: A meta-analysis. Clin Anat 2024; 37:114-129. [PMID: 37819143 DOI: 10.1002/ca.24116] [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: 08/28/2023] [Accepted: 09/08/2023] [Indexed: 10/13/2023]
Abstract
Ventricular false tendons are fibromuscular structures that travel across the ventricular cavity. Left ventricular false tendons (LVFTs) have been examined through gross dissection and echocardiography. This study aimed to comprehensively evaluate the prevalence, morphology, and clinical importance of ventricular false tendons using a systematic review. In multiple studies, these structures have had a wide reported prevalence ranging from less than 1% to 100% of cases. This meta-analysis found the overall pooled prevalence of LVFTs to be 30.2%. Subgroup analysis indicated the prevalence to be 55.1% in cadaveric studies and 24.5% in living patients predominantly studied by echocardiography. Morphologically, left and right ventricular false tendons have been classified into several types based on their location and attachments. Studies have demonstrated false tendons have important clinical implications involving innocent murmurs, premature ventricular contractions, early repolarization, and impairment of systolic and diastolic function. Despite these potential complications, there is evidence demonstrating that the presence of false tendons can lead to positive clinical outcomes.
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Affiliation(s)
- Mark Carrasco
- Department of Family Medicine, HealthQuest, Rhinebeck, New York, USA
| | | | | | - Mateusz K Hołda
- HEART-Heart Embryology and Anatomy Research Team, Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland
- Division of Cardiovascular Sciences, The University of Manchester, Manchester, UK
| | - Jerzy Walocha
- Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland
| | - R Shane Tubbs
- Department of Anatomical Sciences, St. George's University, West Indies
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, Louisiana, USA
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, Louisiana, USA
- Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, Louisiana, USA
| | - Marios Loukas
- Department of Anatomical Sciences, St. George's University, West Indies
- Department of Anatomy, University of Warmia and Mazury, Olsztyn, Poland
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Roberts W, Charles SM, Ang C, Holda MK, Walocha J, Lachman N, Tubbs RS, Loukas M. Myocardial bridges: A meta-analysis. Clin Anat 2021; 34:685-709. [PMID: 33078444 DOI: 10.1002/ca.23697] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 12/11/2022]
Abstract
Myocardial bridges are anatomical entities characterized by myocardium covering segments of coronary arteries. In some patients, the presence of a myocardial bridge is benign and is only incidentally found on autopsy. In other patients, however, myocardial bridges can lead to compression of the coronary artery during systolic contraction and delayed diastolic relaxation, resulting in myocardial ischemia. This ischemia in turn can lead to myocardial infarction, ventricular arrhythmias and sudden cardiac death. Myocardial bridges have also been linked to an increased incidence of atherosclerosis, which has been attributed to increased shear stress and the presence of vasoactive factors. Other studies however, demonstrated the protective roles of myocardial bridges. In this study, using systematic review and a meta-analytical approach we investigate the prevalence and morphology of myocardial bridges in both clinical imaging and cadaveric dissections. We also discuss the pathophysiology, clinical significance, and management of these anatomical entities.
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Affiliation(s)
- Wallisa Roberts
- Department of Medicine, Princess Royal Hospital, Apley Castle, Telford Shropshire, UK
| | - Stacey M Charles
- Department of Anatomical Sciences, St. George's University, School of Medicine, Grenada, West Indies
| | - Cassandra Ang
- Department of Medicine, Princess Royal Hospital, Apley Castle, Telford Shropshire, UK
| | - Mateusz K Holda
- HEART-Heart Embryology and Anatomy Research Team, Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland.,Division of Cardiovascular Sciences, The University of Manchester, England, UK
| | - Jerzy Walocha
- Department of Anatomy, Jagiellonian University, Medical College, Krakow, Poland
| | - Nirusha Lachman
- Department of Clinical Anatomy and Department of Plastic Surgery, Mayo Clinic College of Medicine and Science, Mayo Clinic, Rochester, Minnesota, USA
| | - R Shane Tubbs
- Department of Anatomical Sciences, St. George's University, School of Medicine, Grenada, West Indies.,Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, Louisiana, USA.,Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, Louisiana, USA.,Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, Louisiana, USA
| | - Marios Loukas
- Department of Anatomical Sciences, St. George's University, School of Medicine, Grenada, West Indies.,Department of Anatomy, University of Warmia and Mazury, Olsztyn, Poland
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De Almeida MC, Mori S, Anderson RH. Three-dimensional visualization of the bovine cardiac conduction system and surrounding structures compared to the arrangements in the human heart. J Anat 2021; 238:1359-1370. [PMID: 33491213 DOI: 10.1111/joa.13397] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/10/2020] [Accepted: 01/05/2021] [Indexed: 12/14/2022] Open
Abstract
In the human heart, the atrioventricular node is located toward the apex of the triangle of Koch, which is also at the apex of the inferior pyramidal space. It is adjacent to the atrioventricular portion of the membranous septum, through which it penetrates to become the atrioventricular bundle. Subsequent to its penetration, the conduction axis is located on the crest of the ventricular septum, sandwiched between the muscular septum and ventricular component of the membranous septum, where it gives rise to the ramifications of the left bundle branch. In contrast, the bovine conduction axis has a long non-branching component, which penetrates into a thick muscular atrioventricular septum having skirted the main cardiac bone and the rightward half of the non-coronary sinus of the aortic root. It commonly gives rise to both right and left bundle branches within the muscular ventricular septum. Unlike the situation in man, the left bundle branch is long and thin before it branches into its fascicles. These differences from the human heart, however, have yet to be shown in three-dimensions relative to the surrounding structures. We have now achieved this goal by injecting contrast material into the insulating sheaths that surround the conduction network, evaluating the results by subsequent computed tomography. The fibrous atrioventricular membranous septum of the human heart is replaced in the ox by the main cardiac bone and the muscular atrioventricular septum. The apex of the inferior pyramidal space, which in the bovine, as in the human, is related to the atrioventricular node, is placed inferiorly relative to the left ventricular outflow tract. The bovine atrioventricular conduction axis, therefore, originates from a node itself located inferiorly compared to the human arrangement. The axis must then skirt the non-coronary sinus of the aortic root prior to penetrating the thicker muscular ventricular septum, thus accounting for its long non-branching course. We envisage that our findings will further enhance comparative anatomical research.
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Affiliation(s)
- Marcos C De Almeida
- Department of Genetics and Morphology, Brasilia's University, Brasilia, Brazil
| | - Shumpei Mori
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Robert H Anderson
- Biosciences Institute, Newcastle University, Newcastle-upon-Tyne, UK
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Tretter JT, Gupta SK, Izawa Y, Nishii T, Mori S. Virtual Dissection: Emerging as the Gold Standard of Analyzing Living Heart Anatomy. J Cardiovasc Dev Dis 2020; 7:E30. [PMID: 32806725 PMCID: PMC7570024 DOI: 10.3390/jcdd7030030] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/05/2020] [Accepted: 08/10/2020] [Indexed: 12/14/2022] Open
Abstract
Traditionally, gross cardiac anatomy has been described mainly based on the findings in the dissection suite. Analyses of heart specimens have contributed immensely towards building a fundamental knowledge of cardiac anatomy. However, there are limitations in analyzing the autopsied heart removed from the thorax. Three-dimensional imaging allows visualization of the blood-filled heart in vivo in attitudinally appropriate fashion. This is of paramount importance for not only demonstration of cardiac anatomy for educational purposes, but also for the detailed anatomical evaluation in patients with acquired and congenital heart disease. In this review, we discuss the advantages of three-dimensional imaging, specifically focusing on virtual dissection, a volume rendering-based reconstruction technique using computed tomographic data. We highlight examples of three-dimensional imaging in both education and guiding patient management.
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Affiliation(s)
- Justin T. Tretter
- Heart Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229, USA;
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Saurabh Kumar Gupta
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - 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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Overman DM. Commentary: You're Not Understanding What I'm Saying: Cardiac Morphology and the Tower of Babel. Semin Thorac Cardiovasc Surg 2020; 32:927-929. [DOI: 10.1053/j.semtcvs.2020.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 07/21/2020] [Indexed: 11/11/2022]
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De Almeida MC, Sánchez‐Quintana D, Davis N, Charles FR, Chikweto A, Sylvester W, Loukas M, Anderson RH. The ox atrioventricular conduction axis compared to human in relation to the original investigation of sunao tawara. Clin Anat 2019; 33:383-393. [PMID: 31749249 DOI: 10.1002/ca.23524] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/12/2019] [Accepted: 11/15/2019] [Indexed: 12/18/2022]
Affiliation(s)
| | - Damián Sánchez‐Quintana
- Department of Human Anatomy and Cell Biology. Faculty of MedicineUniversity of Extremadura Badajoz Spain
| | - Nelson Davis
- Department of Anatomical SciencesSt. George's University of Medicine Grenada West Indies
| | | | - Alfred Chikweto
- Veterinary Medical School, St. George's University of Medicine Grenada West Indies
| | - Wayne Sylvester
- Veterinary Medical School, St. George's University of Medicine Grenada West Indies
| | - Marios Loukas
- Department of Anatomical SciencesSt. George's University of Medicine Grenada West Indies
| | - Robert H. Anderson
- Institute of Genetic Medicine, Newcastle University Newcastle‐upon‐Tyne United Kingdom
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Piazza N, Delgado V, Mylotte D, Hamm C. Eyes of the Heart Team - the interventional imaging specialist: a pathway for future generations. EUROINTERVENTION 2019; 15:828-830. [PMID: 31746746 DOI: 10.4244/eijv15i10a156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Nicolo Piazza
- Department of Medicine, Division of Cardiology, McGill University Health Centre, Royal Victoria Hospital, Montreal, QC, Canada
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