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De Ornelas B, Sucato V, Vadalà G, Buono A, Galassi AR. Myocardial Bridge and Atherosclerosis, an Intimal Relationship. Curr Atheroscler Rep 2024; 26:353-366. [PMID: 38822987 DOI: 10.1007/s11883-024-01219-1] [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] [Accepted: 05/18/2024] [Indexed: 06/03/2024]
Abstract
PURPOSE OF REVIEW This review investigates the relationship between myocardial bridges (MBs), intimal thickening in coronary arteries, and Atherosclerotic cardiovascular disease. It focuses on the role of mechanical forces, such as circumferential strain, in arterial wall remodeling and aims to clarify how MBs affect coronary artery pathology. REVIEW FINDINGS MBs have been identified as influential in modulating coronary artery intimal thickness, demonstrating a protective effect against thickening within the MB segment and an increase in thickness proximal to the MB. This is attributed to changes in mechanical stress and hemodynamics. Research involving arterial hypertension models and vein graft disease has underscored the importance of circumferential strain in vascular remodeling and intimal hyperplasia. Understanding the complex dynamics between MBs, mechanical strain, and vascular remodeling is crucial for advancing our knowledge of coronary artery disease mechanisms. This could lead to improved management strategies for cardiovascular diseases, highlighting the need for further research into MB-related vascular changes.
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Affiliation(s)
- Benjamin De Ornelas
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy.
| | - Vincenzo Sucato
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Giuseppe Vadalà
- Division of Cardiology, University Hospital "P. Giaccone", Palermo, Italy
| | - Andrea Buono
- Interventional Cardiology Unit, Cardiovascular Department, Fondazione Poliambulanza Institute, Brescia, Italy
| | - Alfredo Ruggero Galassi
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
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2
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Zhang H, Cao Y. A bibliometric analysis of myocardial bridge combined with myocardial infarction. Medicine (Baltimore) 2024; 103:e38420. [PMID: 38847718 PMCID: PMC11155543 DOI: 10.1097/md.0000000000038420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 05/09/2024] [Indexed: 06/10/2024] Open
Abstract
BACKGROUND The aim of this study is to analyze the process and frontiers of research in myocardial bridges (MB) to identify future research directions in the last 3 decades. METHODS Relevant literature on MB combined with myocardial infarction (MI) was searched from 1991 to 2023 in the Web of Science database, and was analyzed by bibliometric analysis using VOSviewer, CiteSpace, and the R package "bibliometrix." RESULTS A total of 1233 English articles were included in this study. The number of published articles showed an increasing trend yearly. From 2017 to 2022, the annual publication volume rose rapidly, and in 2021 the publication volume even reached 95 articles, which was the highest in all years. These publications were from 68 countries and 1854 institutions, with the leading country being the U.S. and the leading institution being Columbia University. Myoho Clinical International has a close collaborative relationship with Columbia University, while in recent years, the Harvard Medical School has explored the study of MB combined with MI. Annals of Thoracic Surgery was the journal with the highest number of publications, and Takayama Hiroo and Naka Yoshifumi were the authors with the highest number of publications. The most common keywords were MI, cardiogenic shock, and MB. CONCLUSIONS Our findings can help researchers explore the current status of MB combined with MI research and choose new survey routes for upcoming studies. Prevalence and prognosis, mechanism of MB combined with MI and molecular mechanism may become the focus of future research. In addition, more research and cooperation are needed worldwide.
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Affiliation(s)
- Haiyuan Zhang
- School of Graduate, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yuejuan Cao
- Department of Cardiology, Tianjin Union Medical Center, Tianjin, China
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3
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Zhang D, Tian X, Li MY, Zheng WS, Yu Y, Zhang HW, Pan T, Gao BL, Li CY. Quantitative computed tomography angiography evaluation of the coronary fractional flow reserve in patients with left anterior descending artery myocardial bridging. Clin Physiol Funct Imaging 2024; 44:251-259. [PMID: 38356324 DOI: 10.1111/cpf.12872] [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: 06/21/2023] [Revised: 12/28/2023] [Accepted: 01/30/2024] [Indexed: 02/16/2024]
Abstract
PURPOSE To quantitatively investigate the effect of myocardial bridge (MB) in the left anterior descending artery (LAD) on the fractional flow reserve (FFR). MATERIALS AND METHODS Three-hundred patients with LAD MB who had undergone coronary artery CT angiography (CCTA) were retrospectively enroled, and 104 normal patients were enroled as the control. The CCTA-derived fractional flow reserve (FFRCT) was measured at the LAD 10 mm proximal (FFR1) and 20-40 mm distal (FFR3) to the MB and at the MB location (FFR2). RESULTS FFR2 and FFR3 of the MB (with BM only) and MBLA (with both MB and atherosclerosis) groups were significantly (p < 0.01) lower than those of the control. The FFR3 distal to the MB was significantly lower (p < 0.01) than that of the control. The FFRCT of the whole LAD in the MBLA group was significantly (p < 0.05) lower than that of the MB and control group (p < 0.05). MB length (OR 1.061) and MB muscle index (odds ratio or OR 1.007) were two risk factors for abnormal FFRCT, and MB length was a significant independent risk factor for abnormal FFRCT (OR = 1.077). LAD stenosis degree was a risk factor for abnormal FFRCT values (OR 3.301, 95% confidence interval [CI] 1.441-7.562, p = 0.005) and was also a significant independent risk factor (OR = 3.369, 95% CI: 1.392-8.152; p = 0.007) for abnormal FFRCT. CONCLUSION MB significantly affects the FFRCT of distal coronary artery. For patients with MB without atherosclerosis, the MB length is a risk factor significantly affecting FFRCT, and for patients with MB accompanied by atherosclerosis, LAD stenotic severity is an independent risk factor for FFRCT.
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Affiliation(s)
- Dan Zhang
- Department of Radiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Xin Tian
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Meng-Ya Li
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Wen-Song Zheng
- Department of Radiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Yang Yu
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Hao-Wen Zhang
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Tong Pan
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Bu-Lang Gao
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Cai-Ying Li
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
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Bhasin R, AlJamal Y, Kitahara H, Blair J, Balkhy HH. Robotic unroofing of myocardial bridge of the left anterior descending coronary artery in a patient with hypertrophic obstructive cardiomyopathy and previous septal myectomy. J Cardiol Cases 2024; 29:222-225. [PMID: 39100519 PMCID: PMC11295015 DOI: 10.1016/j.jccase.2024.01.001] [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: 09/19/2023] [Revised: 01/05/2024] [Accepted: 01/12/2024] [Indexed: 08/06/2024] Open
Abstract
A 56-year-old female diagnosed with hypertrophic obstructive cardiomyopathy and myocardial bridge (MB) of the left anterior descending (LAD) coronary artery underwent septal myectomy with resolution of her left ventricular outflow tract gradient. She had ongoing refractory symptoms of exertional angina and fatigue for over a decade and finally presented to our clinic to be re-evaluated for treatment. Provocative angiographic testing confirmed significant ischemia secondary to LAD MB. She underwent robotic totally endoscopic off pump unroofing of the LAD MB with complete relief of her symptoms and return to full activity. We conclude that patients undergoing septal myectomy for hypertrophic obstructive cardiomyopathy should be evaluated for MB and undergo unroofing of the bridge at the time of surgery. Learning objective A myocardial bridge (MB) is a condition in which a coronary artery, most often the left anterior descending, takes an intramuscular route and is covered by the myocardium leading to compression and potential ischemia. This case report adds to the growing body of evidence supporting the significance of considering MB in the overall management of hypertrophic obstructive cardiomyopathy, and the symptomatic relief that a patient can obtain from an unroofing procedure.
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Affiliation(s)
- Riya Bhasin
- University of Chicago, Division of Cardiac Surgery, Chicago, IL, USA
| | - Yazan AlJamal
- Mayo Clinic, Division of Cardiac Surgery, Rochester, MN, USA
| | - Hiroto Kitahara
- University of Chicago, Division of Cardiac Surgery, Chicago, IL, USA
| | - John Blair
- University of Chicago, Department of Cardiology, Chicago, IL, USA
| | - Husam H. Balkhy
- University of Chicago, Division of Cardiac Surgery, Chicago, IL, USA
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Matta A, Roncalli J, Carrié D. Update review on myocardial bridging: New insights. Trends Cardiovasc Med 2024; 34:10-15. [PMID: 35697237 DOI: 10.1016/j.tcm.2022.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 11/30/2022]
Abstract
Myocardial bridging (MB) is a common congenital abnormality that remains asymptomatic in a large proportion of patients. The peak of clinical manifestation occurs during the third and fourth decades of life. MB provokes myocardial ischemia through different mechanisms including supply-demand mismatch, endothelial dysfunction, coronary microvascular dysfunction and external mechanical compression. The association between MB and atherosclerotic disease is controversial. Recent studies established a significant association of MB with myocardial infarction and non-obstructive coronary artery disease. The first line medical treatment is based on beta-blockers and calcium channel blockers. Ivabradine is used in second line therapy. Invasive approaches involving percutaneous coronary intervention, coronary artery bypass graft and myotomy are performed in patients with symptoms refractory to maximally tolerated medical treatment. The choice of revascularization technique depends on anatomical characteristics, clinical condition and physician experience. Available data derived from anecdotal evidence view the lack of randomized clinical trials.
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Affiliation(s)
- Anthony Matta
- Department of cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France; Department of cardiology, Intercommunal Hospital Centre Castres-Mazamet, Castres, France; Faculty of medicine, Holy Spirit University of Kaslik, Jounieh, Lebanon
| | - Jerome Roncalli
- Department of cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Didier Carrié
- Department of cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France.
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Zhou P, Wang G, Wang S, Li H, Liu C, Sun J, Yu H. A framework of myocardial bridge detection with x-ray angiography sequence. Biomed Eng Online 2023; 22:101. [PMID: 37858239 PMCID: PMC10585781 DOI: 10.1186/s12938-023-01163-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 10/10/2023] [Indexed: 10/21/2023] Open
Abstract
BACKGROUND Myocardial bridges are congenital anatomical abnormalities in which myocardium covers a segment of coronary arteries, leading to stenocardia, myocardial ischemia, and sudden cardiac death in severe cases. However, automatic diagnosis of myocardial bridge presents significant challenges. METHOD A novel framework of myocardial bridge detection with x-ray angiography sequence is proposed, which can realize automatic detection of vessel stenosis and myocardial bridge. Firstly, we employ a novel neural network model for coronary vessel segmentation, which consists of both CNNs and transformer structures to effectively extract both local and global information of the vessels. Secondly, we describe the vessel segment information, establish the vessel tree in the image, and fuse the vessel tree information between sequences. Finally, based on vessel stenosis detection, we realize automatic detection of the myocardial bridge by querying the blood vessels between the image sequence information. RESULTS In experiment, we evaluate the segmentation results using two metrics, Dice and ASD, and achieve scores of 0.917 and 1.39, respectively. In the stenosis detection, we achieve an average accuracy rate of 92.7% in stenosis detection among 262 stenoses. In multi-frame image processing, vessels in different frames can be well-matched, and the accuracy of myocardial bridge detection achieves 75%. CONCLUSIONS Our experimental results demonstrate that the algorithm can automatically detect stenosis and myocardial bridge, providing a new idea for subsequent automatic diagnosis of coronary vessels.
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Affiliation(s)
- Peng Zhou
- The School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Nankai District, No.92 Weijin Road, Tianjin, China
| | - Guangpu Wang
- The School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Nankai District, No.92 Weijin Road, Tianjin, China
| | - Shuo Wang
- The Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
| | - Huanming Li
- Joint Laboratory of Intelligent Medicine, Tianjin 4Th Centre Hospital, Tianjin, China
| | - Chong Liu
- Joint Laboratory of Intelligent Medicine, Tianjin 4Th Centre Hospital, Tianjin, China
| | - Jinglai Sun
- The School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Nankai District, No.92 Weijin Road, Tianjin, China.
| | - Hui Yu
- The School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Nankai District, No.92 Weijin Road, Tianjin, China.
- The Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China.
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Yang TL, Ting J, Lin MR, Chang WC, Shih CM. Identification of Genetic Variants Associated with Severe Myocardial Bridging through Whole-Exome Sequencing. J Pers Med 2023; 13:1509. [PMID: 37888120 PMCID: PMC10608235 DOI: 10.3390/jpm13101509] [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: 09/06/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023] Open
Abstract
Myocardial bridging (MB) is a congenital coronary artery anomaly and an important cause of angina. The genetic basis of MB is currently unknown. This study used a whole-exome sequencing technique and analyzed genotypic differences. Eight coronary angiography-confirmed cases of severe MB and eight age- and sex-matched control patients were investigated. In total, 139 rare variants that are potentially pathogenic for severe MB were identified in 132 genes. Genes with multiple rare variants or co-predicted by ClinVar and CADD/REVEL for severe MB were collected, from which heart-specific genes were selected under the guidance of tissue expression levels. Functional annotation indicated significant genetic associations with abnormal skeletal muscle mass, cardiomyopathies, and transmembrane ion channels. Candidate genes were reviewed regarding the functions and locations of each individual gene product. Among the gene candidates for severe MB, rare variants in DMD, SGCA, and TTN were determined to be the most crucial. The results suggest that altered anchoring proteins on the cell membrane and intracellular sarcomere unit of cardiomyocytes play a role in the development of the missed trajectory of coronary vessels. Additional studies are required to support the diagnostic application of cardiac sarcoglycan and dystroglycan complexes in patients with severe MB.
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Affiliation(s)
- Tsung-Lin Yang
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan;
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Cardiovascular Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
| | - Jafit Ting
- Department of Clinical Pharmacy, School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan; (J.T.); (M.-R.L.)
| | - Min-Rou Lin
- Department of Clinical Pharmacy, School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan; (J.T.); (M.-R.L.)
| | - Wei-Chiao Chang
- Department of Clinical Pharmacy, School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan; (J.T.); (M.-R.L.)
- Master’ Program in Clinical Genomics and Proteomics, School of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan
- Integrative Research Center for Critical Care, Wan Fang Hospital, Taipei Medical University, Taipei 11696, Taiwan
| | - Chun-Ming Shih
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan;
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Cardiovascular Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
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8
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Guevara-Bermudez LP, Toleva O. Worsening of Angina Following Nitroglycerin Administration: A Case Report of the Interplay With Undiagnosed Myocardial Bridge. Cureus 2023; 15:e40091. [PMID: 37425580 PMCID: PMC10328144 DOI: 10.7759/cureus.40091] [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] [Accepted: 06/06/2023] [Indexed: 07/11/2023] Open
Abstract
Myocardial bridge (MB) is a congenital abnormality where part of a coronary epicardial artery runs under the myocardium fibers and is compressed in systole; this becomes more pronounced when nitroglycerin (NTG) is administered. In this report, we describe the case of a 40-year-old African American man who presented with chest pain that did not respond to NTG or isosorbide mononitrate and was only partially relieved by narcotics. His past medical history was significant for coronary artery disease (CAD) with a stent into the left anterior descending artery (LAD) several months prior, hypertension, hyperlipidemia, paroxysmal atrial fibrillation, sick sinus syndrome, permanent pacemaker, pulmonary embolism, and cerebral vascular accident. No explanation for his angina was found either in the previous outpatient left heart catheterization (LHC) procedures demonstrating LAD stent patency or initial chest pain workup upon admission. Functional LHC procedure with adenosine infusion and acetylcholine provocation demonstrated endothelial dysfunction with notable epicardial spasm and MB of the LAD that worsened with NTG. Cardiology advised dual antiplatelet therapy and a statin as part of treatment for CAD and a calcium channel blocker with a bradycardic effect (e.g., diltiazem, verapamil) for the MB and coronary vasospasm, and avoidance of NTG and long-acting nitrates (e.g., isosorbide mononitrate), which can cause reflex tachycardia and worsen angina from MB. A selective serotonin reuptake inhibitor was added for increased cardiac nociception. The patient's pain resolved, and he was discharged. MB is an important alternate etiology to consider when chest pain does not respond to NTG administration for adjustment of treatment modalities. The initial treatment for this patient's pain with NTG likely exacerbated symptoms by reducing intrinsic coronary wall tension and subsequently increasing reflex sympathetic stimulation of contractility of the left ventricular myocardium, which can, in turn, increase anginal symptoms and ischemia.
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Affiliation(s)
- Liliana P Guevara-Bermudez
- Department of Hospital Medicine, Emory Saint Joseph's Hospital, Atlanta, USA
- Department of Medicine, Division of Hospital Medicine, Emory University School of Medicine, Atlanta, USA
| | - Olga Toleva
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, USA
- Emory Women's Heart Center, Emory Saint Joseph's Hospital, Atlanta, USA
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Vaikunth SS, Murphy DJ, Tremmel JA, Schnittger I, Mitchell RS, Maeda K, Rogers IS. Symptomatic Myocardial Bridging in D-Transposition of the Great Arteries Post-Arterial Switch. JACC Case Rep 2023; 8:101730. [PMID: 36860558 PMCID: PMC9969547 DOI: 10.1016/j.jaccas.2022.101730] [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: 09/06/2022] [Revised: 11/17/2022] [Accepted: 12/09/2022] [Indexed: 01/21/2023]
Abstract
We present Stanford's experience with patients post-arterial switch operation presenting with chest pain found to have hemodynamically significant myocardial bridging. The evaluation of symptomatic patients post-arterial switch should not only include assessment for coronary ostial patency but also for nonobstructive coronary conditions such as myocardial bridging. (Level of Difficulty: Advanced.).
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Affiliation(s)
- Sumeet S. Vaikunth
- Department of Medicine, Division of Cardiovascular Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA,Division of Cardiology, Children’s Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA,Address for correspondence: Dr Sumeet S. Vaikunth, Perelman Center for Advanced Medicine, 11th Floor, South Pavilion, 3400 Civic Center Boulevard, Philadelphia, Pennsylvania 19104-5127, USA.
| | - Daniel J. Murphy
- Department of Pediatrics, Division of Pediatric Cardiology, Stanford University School of Medicine, Palo Alto, California, USA
| | - Jennifer A. Tremmel
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Palo Alto, California, USA
| | - Ingela Schnittger
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Palo Alto, California, USA
| | - Robert Scott Mitchell
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, California, USA
| | - Katsuhide Maeda
- Division of Cardiothoracic Surgery, Children’s Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Ian S. Rogers
- Department of Pediatrics, Division of Pediatric Cardiology, Stanford University School of Medicine, Palo Alto, California, USA,Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Palo Alto, California, USA
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Chen L, Yu WY, Liu R, Gao MX, Wang BL, Ding XH, Yu Y. A bibliometric analysis on the progress of myocardial bridge from 1980 to 2022. Front Cardiovasc Med 2023; 9:1051383. [PMID: 36684604 PMCID: PMC9853984 DOI: 10.3389/fcvm.2022.1051383] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/05/2022] [Indexed: 01/07/2023] Open
Abstract
Introduction Although the vast majority of patients with a myocardial bridge (MB) are asymptomatic, the anomaly was found to be associated with stable or unstable angina, vasospastic angina, acute coronary syndrome, and even malignant arrhythmias and sudden cardiac death in some cases. Methods By retrieving the relevant literature on MB from 1 January 1980 to 31 July 2022 from the Web of Science Core Collection (WoSCC) database, we used the bibliometric tools, including CiteSpace, VOS viewer, and alluvial generator, to visualize the scientific achievements on MB. Results A total of 630 articles were included. The number of published articles was in a fluctuating growth trend. These publications came from 37 contries, led by the USA and China. The leading country on MB was the United States, the leading position among institutions was Stanford University, and the most productive researcher on MB was Jennifer A. Tremmel. After analysis, the most common keywords were myocardial bridge, mortality, coronary angiography, descending coronary artery, and sudden death. Conclusion Our findings can aid researchers in understanding the current state of MB research and in choosing fresh lines of inquiry for forthcoming investigations. Prevalence and prognosis, mechanism atherosclerosis, hemodynamic significance, and molecular autops will likely become the focus of future research. In addition, more studies and cooperations are still needed worldwide.
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Li HH, Liu MW, Zhang YF, Song BC, Zhu ZC, Zhao FH. Myocardial bridging phenomenon is not invariable: A case report. World J Clin Cases 2022; 10:10721-10727. [PMID: 36312505 PMCID: PMC9602226 DOI: 10.12998/wjcc.v10.i29.10721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/10/2022] [Accepted: 08/25/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Myocardial bridging is a common anatomical malformation, and the milking effect is a characteristic phenomenon of myocardial bridging in coronary angiography. Generally, the phenomenon is invariable. However, this article reports an inconceivably rare myocardial bridging phenomenon that breaks through our conventional views. The milking effect changed obviously in two coronary angiography examinations, which subverted the traditional deep-rooted view of the myocardial bridging phenomenon and revealed the limitations of coronary angiography in diagnosing myocardial bridging and judging the prognosis of it.
CASE SUMMARY A 63-year-old man was diagnosed with ST-segment elevation myocardial infarction and received primary percutaneous coronary intervention on December 26, 2019. His heart rate was 104 beats per minute, and blood pressure was 15.3/10.3 kPa. A severe milking effect was found in the left anterior descending coronary artery during his index coronary angiography on January 14, 2020. The patient was given intensive medical management, including a β1-adrenergic receptor blocker, during hospitalization and after discharge. Unexpectedly, coronary angiography showed that the previous impressive milking effect was dramatically alleviated (close to normal) at the follow-up on October 13, 2020. At that moment, the patient’s heart rate was 83 beats per minute, and blood pressure was 12.7/8.0 kPa.
CONCLUSION The myocardial bridging phenomenon is not invariable and, in certain circumstances, may vary. Furthermore, the autonomic nervous system may be involved in the myocardial bridging phenomenon.
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Affiliation(s)
- Hao-Hao Li
- Graduate School of Beijing University of Chinese Medicine, Beijing 100029, China
| | - Ming-Wang Liu
- Department of Cardiology, Xiyuan Hospital, Chinese Academy of Chinese Medicine Science, National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Yang-Fang Zhang
- Department of Cardiology, Xiyuan Hospital, Chinese Academy of Chinese Medicine Science, National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Bo-Ce Song
- Department of Cardiology, Xiyuan Hospital, Chinese Academy of Chinese Medicine Science, National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Zheng-Chuan Zhu
- Department of Cardiology, Xiyuan Hospital, Chinese Academy of Chinese Medicine Science, National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Fu-Hai Zhao
- Department of Cardiology, Xiyuan Hospital, Chinese Academy of Chinese Medicine Science, National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
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Freiling TP, Dhawan R, Balkhy HH, Castillo J, Cotter EK, Chaney MA. MYOCARDIAL BRIDGE: DIAGNOSIS, TREATMENT, AND CHALLENGES. J Cardiothorac Vasc Anesth 2022; 36:3955-3963. [DOI: 10.1053/j.jvca.2022.06.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 06/17/2022] [Indexed: 11/11/2022]
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13
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Jiang MX, Brinza EK, Ghobrial J, Tucker DL, Gupta S, Rajeswaran J, Karamlou T. Coronary artery disease in adults with anomalous aortic origin of a coronary artery. JTCVS OPEN 2022; 10:205-221. [PMID: 36004264 PMCID: PMC9390708 DOI: 10.1016/j.xjon.2022.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 03/01/2022] [Accepted: 04/12/2022] [Indexed: 12/01/2022]
Abstract
Objectives This study sought to characterize coronary artery disease (CAD) among adults diagnosed with an anomalous aortic origin of a coronary artery (AAOCA). We hypothesized that coronaries with anomalous origins have more severe CAD stenosis than coronaries with normal origins. Methods This single-center study of 763 adults with AAOCA consisted of 620 patients from our cardiac catheterization database (1958-2009) and 273 patients from electronic medical records query (2010-2021). Within left main, anterior descending, circumflex, and right coronary arteries, the CAD stenosis severity, assessed by invasive or computer tomography angiography, was modeled with coronary-level variables (presence of an anomalous origin) and patient-level variables (age, sex, comorbidities, and which of the four coronaries was anomalous). Results Of the 763 patients, 472 (60%) had obstructive CAD, of whom, 142/472 (30%) had obstructive CAD only in the anomalous coronary. Multivariable modeling showed similar CAD stenosis severity between coronaries with anomalous versus normal origins (P = .8). Compared with AAOCA of other coronaries, the anomalous circumflex was diagnosed at older ages (59.7 ± 11.1 vs 54.3 ± 15.8 years, P < .0001) and was associated with increased stenosis in all coronaries (odds ratio, 2.7; 95% confidence interval, 2.2-3.4, P < .0001). Conclusions Among adults diagnosed with AAOCA, the anomalous origin did not appear to increase the severity of CAD within the anomalous coronary. In contrast to the circumflex, AAOCA of the other vessels may contribute a greater ischemic burden when they present symptomatically at younger ages with less CAD. Future research should investigate the interaction between AAOCA, CAD, and ischemic risk to guide interventions.
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Affiliation(s)
- Michael X. Jiang
- Department of Pediatrics, Cleveland Clinic Children's Hospital, Cleveland, Ohio
| | - Ellen K. Brinza
- Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, Ohio
| | - Joanna Ghobrial
- Department of Cardiovascular Medicine, Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Dominique L. Tucker
- Case Western Reserve University School of Medicine, Cleveland Clinic, Cleveland, Ohio
| | - Sohini Gupta
- Case Western Reserve University School of Medicine, Cleveland Clinic, Cleveland, Ohio
| | | | - Tara Karamlou
- Department of Thoracic and Cardiovascular Surgery, Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
- Address for reprints: Tara Karamlou, MD, MSc, Division of Pediatric Cardiac Surgery and the Heart Vascular, and Thoracic Institute, 9500 Euclid Ave, M41-022A, Cleveland, OH 44195.
| | - Cleveland Clinic Adult AAOCA Working Group∗BlackstoneEugene H.MDefSaarelElizabeth V.MDghGuptaSohiniBAiHammoudMiza SalimMDfVaidyaKiran A.BSbHauptMichael J.BSbCockrumJoshua W.BSbMhannaChristianeDOaGhobrialJoannaMDjAhmadMunirMDfSchoenhagenPaulMDkPetterssonGösta B.MD, PhDfNajmHani K.MD, MScfStewartRobert D.MD, MPHflDepartment of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OhioDepartment of Thoracic and Cardiovascular Surgery, Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OhioDepartment of Pediatric Cardiology, Cleveland Clinic, Cleveland, OhioDepartment of Pediatric Cardiology, St. Luke's Children's Hospital, Boise, IdahoCase Western Reserve University School of Medicine, Cleveland, OhioCleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, OhioDepartment of Pediatrics, Cleveland Clinic Children's Hospital, Cleveland, OhioDepartment of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OhioDepartment of Cardiovascular Imaging, Cleveland Clinic, Cleveland, OhioDepartment of Cardiovascular Surgery, Akron Children's Hospital, Akron, Ohio
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14
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D’Ascenzi F, Baggiano A, Cavigli L, Mandoli GE, Andreini D, Marallo C, Valente S, Focardi M, Cameli M, Pontone G. The role of cardiac computed tomography in sports cardiology: back to the future! Eur Heart J Cardiovasc Imaging 2022; 23:e481-e493. [DOI: 10.1093/ehjci/jeac069] [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] [Received: 11/22/2021] [Revised: 02/15/2022] [Accepted: 03/21/2022] [Indexed: 11/14/2022] Open
Abstract
Abstract
In recent years, the role of pre-participation evaluation (PPE) in the prevention of sudden cardiac death in competitive athletes has become evident. Most physicians routinely supplement assessment by resting electrocardiogram with imaging techniques, such as echocardiography. The primary goal of imaging in the clinical assessment of competitive athletes is to exclude cardiovascular conditions associated with adverse outcomes. Cardiac computed tomography is emerging as an important technique for stratifying cardiovascular risk and assessing coronary artery disease (CAD), particularly in master athletes. Conversely, in young athletes, this technique has the best non-invasive coronary artery resolution and provides valuable details on coronary artery anatomy. Recent technical developments have brought about a dramatic reduction in radiation exposure, a major drawback of this diagnostic method; nowadays cardiac computed tomography may be performed at a dose of barely one millisievert. The present review provides a practical guide for the use of cardiac computed tomography in the PPE of competitive athletes, with a specific focus on its value for detecting congenital coronary anomalies and CAD in young and master athletes, respectively.
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Affiliation(s)
- Flavio D’Ascenzi
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Andrea Baggiano
- Cardiovascular Imaging Department, Centro Cardiologico Monzino IRCCS, Milan, Italy
- Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, Milan, Italy
| | - Luna Cavigli
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Giulia Elena Mandoli
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Daniele Andreini
- Cardiovascular Imaging Department, Centro Cardiologico Monzino IRCCS, Milan, Italy
- Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, Milan, Italy
| | - Carmine Marallo
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Serafina Valente
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Marta Focardi
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Matteo Cameli
- Department of Medical Biotechnologies, Division of Cardiology, University of Siena, V.le M. Bracci 16, 53100 Siena, Italy
| | - Gianluca Pontone
- Cardiovascular Imaging Department, Centro Cardiologico Monzino IRCCS, Milan, Italy
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15
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Xu T, You W, Wu Z, Meng P, Ye F, Wu X, Chen S. Retrospective analysis of OCT on MB characteristics and 1-year follow-up of the ISR incidence after the DES implantation in patients with MB. Sci Rep 2022; 12:534. [PMID: 35017626 PMCID: PMC8752833 DOI: 10.1038/s41598-021-04579-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 12/20/2021] [Indexed: 11/16/2022] Open
Abstract
We used optical coherence tomography (OCT) to analyze the "half-moon" like phenomenon and its characteristics and observe 1-year follow-up of the in-stent restenosis (ISR) incidence after the drug eluted stent (DES) implantation in patients with the myocardial bridge (MB). Patients were retrospectively analyzed from January 2013 to December 2019. We used OCT to check 45 patients with MB and found a visible muscle layer (VML) around the vessel adventitia with the same or high density compared to the vessel media layer. There was not any significant difference in maximal thickness, maximal arch, and total length between the half-moon layer and the visible muscle layer groups (p > 0.05). Maximal thickness, arch, and total length of the half-moon layer were significantly positively related to VML, respectively (r = 0.962, 0.985, 0.742, p < 0.01). Of these 626 patients with MB seen by OCT, only 300 could be checked out by coronary angiography (CAG). Besides, the larger the thickness and arch of the VML around the vessel adventitia, the more severe the MB in these patients (p < 0.05). After the OCT use, there was no coronary perforation in these patients with MB covered with DES. After 1-year follow-up, ISR in MB covered with DES showed a notable difference among no MB, mild MB, moderate MB, and severe MB groups (p < 0.05), and ISR in DES aggravated with the MB severity. However, ISR in MB with and without covered with DES had no significant difference among the 4 groups (p > 0.05). OCT could evaluate MB characteristics accurately compared to IVUS and had a higher rate of detecting MB than CAG. Moreover, it is safe and effective to guide DES covering the mild MB segment in patients with severe coronary lesions detected by the OCT.
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Affiliation(s)
- Tian Xu
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China
| | - Wei You
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China
| | - Zhiming Wu
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China
| | - Peina Meng
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China
| | - Fei Ye
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China.
| | - Xiangqi Wu
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China.
| | - Shaoliang Chen
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 68 Changle Rd, Nanjing, 210006, China.
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16
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Sternheim D, Power DA, Samtani R, Kini A, Fuster V, Sharma S. Myocardial Bridging: Diagnosis, Functional Assessment, and Management: JACC State-of-the-Art Review. J Am Coll Cardiol 2021; 78:2196-2212. [PMID: 34823663 DOI: 10.1016/j.jacc.2021.09.859] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/20/2021] [Accepted: 09/27/2021] [Indexed: 02/08/2023]
Abstract
Myocardial bridging (MB) is a congenital coronary anomaly in which a segment of the epicardial coronary artery traverses through the myocardium for a portion of its length. The muscle overlying the artery is termed a myocardial bridge, and the intramyocardial segment is referred to as a tunneled artery. MB can occur in any coronary artery, although is most commonly seen in the left anterior descending artery. Although traditionally considered benign in nature, increasing attention is being given to specific subsets of MB associated with ischemic symptomatology. The advent of contemporary functional and anatomic imaging modalities, both invasive and noninvasive, have dramatically improved our understanding of dynamic pathophysiology associated with MBs. This review provides a contemporary overview of epidemiology, pathobiology, diagnosis, functional assessment, and management of MBs.
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Affiliation(s)
- David Sternheim
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - David A Power
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA. https://twitter.com/rowpower
| | - Rajeev Samtani
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Anapoorna Kini
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Valentin Fuster
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA; Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Samin Sharma
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
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17
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McLaughlin T, Schnittger I, Nagy A, Zanley E, Xu Y, Song Y, Nieman K, Tremmel JA, Dey D, Boyd J, Sacks H. Relationship Between Coronary Atheroma, Epicardial Adipose Tissue Inflammation, and Adipocyte Differentiation Across the Human Myocardial Bridge. J Am Heart Assoc 2021; 10:e021003. [PMID: 34726081 PMCID: PMC8751937 DOI: 10.1161/jaha.121.021003] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Background Inflammation in epicardial adipose tissue (EAT) may contribute to coronary atherosclerosis. Myocardial bridge is a congenital anomaly in which the left anterior descending coronary artery takes a "tunneled" course under a bridge of myocardium: while atherosclerosis develops in the proximal left anterior descending coronary artery, the bridged portion is spared, highlighting the possibility that geographic separation from inflamed EAT is protective. We tested the hypothesis that inflammation in EAT was related to atherosclerosis by comparing EAT from proximal and bridge depots in individuals with myocardial bridge and varying degrees of atherosclerotic plaque. Methods and Results Maximal plaque burden was quantified by intravascular ultrasound, and inflammation was quantified by pericoronary EAT signal attenuation (pericoronary adipose tissue attenuation) from cardiac computed tomography scans. EAT overlying the proximal left anterior descending coronary artery and myocardial bridge was harvested for measurement of mRNA and microRNA (miRNA) using custom chips by Nanostring; inflammatory cytokines were measured in tissue culture supernatants. Pericoronary adipose tissue attenuation was increased, indicating inflammation, in proximal versus bridge EAT, in proportion to atherosclerotic plaque. Individuals with moderate-high versus low plaque burden exhibited greater expression of inflammation and hypoxia genes, and lower expression of adipogenesis genes. Comparison of gene expression in proximal versus bridge depots revealed differences only in participants with moderate-high plaque: inflammation was higher in proximal and adipogenesis lower in bridge EAT. Secreted inflammatory cytokines tended to be higher in proximal EAT. Hypoxia-inducible factor 1a was highly associated with inflammatory gene expression. Seven miRNAs were differentially expressed by depot: 3192-5P, 518D-3P, and 532-5P were upregulated in proximal EAT, whereas miR 630, 575, 16-5P, and 320E were upregulated in bridge EAT. miR 630 correlated directly with plaque burden and inversely with adipogenesis genes. miR 3192-5P, 518D-3P, and 532-5P correlated inversely with hypoxia/oxidative stress, peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PCG1a), adipogenesis, and angiogenesis genes. Conclusions Inflammation is specifically elevated in EAT overlying atherosclerotic plaque, suggesting that EAT inflammation is caused by atherogenic molecular signals, including hypoxia-inducible factor 1a and/or miRNAs in an "inside-to-out" relationship. Adipogenesis was suppressed in the bridge EAT, but only in the presence of atherosclerotic plaque, supporting cross talk between the vasculature and EAT. miR 630 in EAT, expressed differentially according to burden of atherosclerotic plaque, and 3 other miRNAs appear to inhibit key genes related to adipogenesis, angiogenesis, hypoxia/oxidative stress, and thermogenesis in EAT, highlighting a role for miRNA in mediating cross talk between the coronary vasculature and EAT.
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Affiliation(s)
- Tracey McLaughlin
- Division of Endocrinology Stanford University School of Medicine Stanford CA
| | - Ingela Schnittger
- Division of Cardiovascular Medicine Stanford University School of Medicine Stanford CA
| | - Anna Nagy
- Division of Endocrinology Stanford University School of Medicine Stanford CA
| | - Elizabeth Zanley
- Division of Endocrinology Stanford University School of Medicine Stanford CA
| | - Yue Xu
- Division of Endocrinology Stanford University School of Medicine Stanford CA
| | - Yanqiu Song
- Cardiovascular Institute Tianjin Chest Hospital Tianjin China
| | - Koen Nieman
- Division of Cardiovascular Medicine Stanford University School of Medicine Stanford CA
| | - Jennifer A Tremmel
- Division of Cardiovascular Medicine Stanford University School of Medicine Stanford CA
| | - Damini Dey
- Department of Biomedical Sciences and Medicine Cedars-Sinai Medical Center Biomedical Imaging Research Institute Los Angeles CA
| | - Jack Boyd
- Department of Cardiothoracic Surgery Stanford University School of Medicine Stanford CA
| | - Harold Sacks
- Division of Endocrinology Department of Medicine David Geffen School of Medicine at UCLA Los Angeles CA
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18
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Myocardial Bridging Unmasks as an Acute Coronary Syndrome from Dehydration. Case Rep Cardiol 2021; 2021:5589776. [PMID: 34336298 PMCID: PMC8292064 DOI: 10.1155/2021/5589776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 06/30/2021] [Indexed: 11/17/2022] Open
Abstract
A 50-year-old male presented for loss of consciousness. He was initially treated with intravenous epinephrine and fluids, and an electrocardiogram (ECG) displayed an ST-segment elevation in lead aVR with global ST-segment depressions. A subsequent left heart catheterization revealed that the middle segment of the left anterior descending artery (LAD) demonstrated severe stenosis during systole but would become patent during diastole, which was suggestive of myocardial bridging. After stopping the epinephrine and increasing the fluid infusion, the ECG changes rapidly resolved. The patient had later admitted to significant dehydration all day. Myocardial bridging is a congenital anomaly in which a coronary artery segment courses through the myocardium instead of the usual epicardial surface. Occasionally, myocardial bridging may present similarly to acute coronary syndrome in severe dehydration or hyperadrenergic states. The diagnosis can be made through coronary angiography, which reveals a dynamic vessel obstruction pattern corresponding with the cardiac cycle. Long-term effects may also include accelerated atherosclerosis. Treatment consists of reversing precipitating causes during acute presentations and decreasing the risk of coronary artery disease on a chronic basis.
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19
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Matta A, Canitrot R, Nader V, Blanco S, Campelo-Parada F, Bouisset F, Lhermusier T, Elbaz M, Carrie D, Roncalli J. Left anterior descending myocardial bridge: Angiographic prevalence and its association to atherosclerosis. Indian Heart J 2021; 73:429-433. [PMID: 34474753 PMCID: PMC8424261 DOI: 10.1016/j.ihj.2021.01.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 11/24/2020] [Accepted: 01/14/2021] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVE Left anterior descending Myocardial Bridge (LADMB) is considered a benign condition and actually becomes a forgotten cause of serious cardiac events. This study was conducted to estimate the prevalence of LADMB and its association to atherosclerosis. METHODS An observational retrospective study was conducted on patients referred for coronary angiography between June 2012 and June 2020. Coronary angiography database was revisedand studied population was divided into 2 groups: LADMB group versus Non-LADMB group. RESULTS LADMB was detected in 510 patients out of 35813 included in the study resulting in a prevalence at 1.42%. The mean age was 66.5 years. Male gender was more common than female (70vs30%). The prevalence of significant atherosclerotic LAD disease was more than two times higher in the non-LADMB group compared to the LADMB group. Statistical analysis revealed a significant negative association between LADMB and atherosclerosis (p < 0.001). A significant greater rate of MINOCA cases was observed in acute coronary syndrome LADMB patients. CONCLUSIONS LADMB is an inborn anatomic variation associated to atherosclerotic risk reduction in LAD. Physicians must be aware about the potential complications and pay attention to those classified at high risk for cardiovascular events.
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Affiliation(s)
- Anthony Matta
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France; Faculty of Medicine, Holy Spirit University of Kaslik, Kaslik, Lebanon
| | - Ronan Canitrot
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Vanessa Nader
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France; Faculty of Pharmacy, Lebanese University, Beirut, Lebanon
| | - Stephanie Blanco
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Francesco Campelo-Parada
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Frederic Bouisset
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Thibault Lhermusier
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Meyer Elbaz
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Didier Carrie
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France
| | - Jerome Roncalli
- Department of Cardiology, Institute CARDIOMET, University Hospital of Toulouse, Toulouse, France.
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20
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Morphological analysis of myocardial bridges and coronary arterial dominance in northeast Brazil. Morphologie 2021; 106:92-97. [PMID: 33775545 DOI: 10.1016/j.morpho.2021.03.003] [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: 02/02/2021] [Revised: 03/08/2021] [Accepted: 03/08/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Coronary arterial dominance and myocardial bridges have clinical implications, since a left dominant pattern associated to the presence of myocardial bridges is often associated to a higher incidence of arteriosclerosis and higher mortality by myocardial infarction. OBJECTIVE To determine the presence and position of myocardial bridges and their relation with coronary arterial dominance. METHODS Fifty-seven human cadaveric hearts were analyzed into three groups, as follows: right dominance; left dominance; codominance. Each group was then divided into two subgroups: with or without myocardial bridges. Finally, each subgroup with myocardial bridges was classified according to the position of the myocardial bridge according to the main axis of the heart (proximal, middle and distal third). RESULTS The right dominance occurred in most hearts (30 hearts-52,6%). Twenty-three myocardial bridges (40,3%) were identified and mostly occurred on left dominant hearts (22,8%). The pattern of coronary dominance presented a statistically significant correlation with the presence of myocardial bridges (P=0.048). The middle third of the heart axis showed the highest occurrence of myocardial bridges. CONCLUSION These findings suggest there is a clear relationship between the presence of myocardial bridges and left dominant pattern. Middle third of the heart axis present the higher occurrence of myocardial bridges. Knowledge of the myocardial bridges morphology is of great clinical significance, improving patient care.
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21
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Erol N. Challenges in Evaluation and Management of Children with Myocardial Bridging. Cardiology 2021; 146:273-280. [PMID: 33631747 DOI: 10.1159/000513900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 12/10/2020] [Indexed: 11/19/2022]
Abstract
Myocardial bridging (MB) is a congenital anomaly where a coronary artery branch or group of branches extends inside a tunnel consisting of myocardium. Although it is mostly considered "benign," it is reported that MB may lead to significant cardiac problems and sudden cardiac deaths. While it is a congenital anomaly, its symptoms usually arise at further ages rather than childhood. The literature on MB in children is in the form of case reports or small case series. This is why pediatric cases are assessed in the light of information obtained from adults. This review compiled the literature on MB in adults and children and compared it, as well as discussing questions arising regarding the clinic, diagnosis, and treatment of MB.
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Affiliation(s)
- Nurdan Erol
- Pediatric Clinics, Zeynep Kamil Gynecology and Pediatrics Training and Research Hospital, Health Sciences University, Uskudar/Istanbul, Turkey,
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22
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INANİR M. Evaluation of Platelet Indices in Diabetic Patients with Myocardial Bridges. DICLE MEDICAL JOURNAL 2020. [DOI: 10.5798/dicletip.755704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Zhu C, Wang S, Cui H, Tang B, Wang S. Associations of myocardial bridging with adverse cardiac events: a meta-analysis of published observational cohort studies involving 4,556 individuals. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:369. [PMID: 32355813 PMCID: PMC7186699 DOI: 10.21037/atm.2020.02.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Background Data derived from small series have demonstrated an association of myocardial bridge (MB) with adverse cardiac events, while MB has been traditionally considered as a benign condition. Hence, the precise clinical implications of MB on prognosis remains inconsistent. Our purpose is to perform a meta-analysis to assess the clinical implications of MB on prognosis. Methods We performed an extensive search of PubMed and reference lists of relevant articles. Studies which compared prognosis between subjects with and without MB were identified from 1960 to 31 March 2018. Studies selection was limited to human data and restricted to English language. Results Six eligible studies were included in current meta-analysis. Of 4,556 subjects, 1,389 (30.5%) presented MB. MB was associated with an increased risk of adverse cardiac events [odds ratio (OR), 1.71; 95% confidence interval (CI): 1.29 to 2.26; P=0.0002], non-fatal myocardial infarction (OR: 3.17; 95% CI: 1.21 to 8.31; P=0.02), and angina requiring hospitalization (OR: 2.31; 95% CI: 1.55 to 3.45; P<0.0001), respectively, compared with subjects without MB. Conclusions This meta-analysis of currently available observational cohort studies suggests that MB has an association with adverse cardiac events. Further prospective multicenter studies with large sample size are needed to confirm current findings. Moreover, studies refining the impact of different types of MB on cardiac events, myocardial ischemia, and symptoms requiring therapy, may provide more insights to this issue.
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Affiliation(s)
- Changsheng Zhu
- Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Shuiyun Wang
- Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Hao Cui
- Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Bing Tang
- Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Shengwei Wang
- Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Jubran A, Schnittger I, Tremmel J, Pargaonkar V, Rogers I, Becker HC, Yang S, Mastrodicasa D, Willemink M, Fleischmann D, Nieman K. Computed Tomographic Angiography–Based Fractional Flow Reserve Compared With Catheter-Based Dobutamine-Stress Diastolic Fractional Flow Reserve in Symptomatic Patients With a Myocardial Bridge and No Obstructive Coronary Artery Disease. Circ Cardiovasc Imaging 2020; 13:e009576. [DOI: 10.1161/circimaging.119.009576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Ayman Jubran
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
| | - Ingela Schnittger
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
| | - Jennifer Tremmel
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
| | - Vedant Pargaonkar
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
| | - Ian Rogers
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
| | - Hans Christoph Becker
- Department of Radiology (H.C.B., D.M., M.W., D.F.), Stanford University School of Medicine, CA
| | - Shengwen Yang
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
- Arrhythmia Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing (S.Y.)
| | - Domenico Mastrodicasa
- Department of Radiology (H.C.B., D.M., M.W., D.F.), Stanford University School of Medicine, CA
| | - Martin Willemink
- Department of Radiology (H.C.B., D.M., M.W., D.F.), Stanford University School of Medicine, CA
| | - Dominik Fleischmann
- Department of Radiology (H.C.B., D.M., M.W., D.F.), Stanford University School of Medicine, CA
| | - Koen Nieman
- Division of Cardiovascular Medicine (A.J., I.S., J.T., V.P., I.R., S.Y., K.N.), Stanford University School of Medicine, CA
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Surgical treatment of symptomatic left anterior descending myocardial bridges: myotomy vs. bypass surgery. Surg Today 2020; 50:685-692. [PMID: 31893309 DOI: 10.1007/s00595-019-01935-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 11/29/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE To compare the effects of myotomy and bypass surgery for treating myocardial bridges (MBs) over the left anterior descending artery (LAD) in a single-center observation study. METHODS Fifty-four eligible patients (34 males, median age of 60 years old) with symptomatic LAD-MBs who underwent myotomy (31 patients) or bypass surgery (23 patients) were included in this study. The primary endpoints were the occurrence of major adverse cardiac events (MACEs) and angiographic demonstration of adverse angiographic results. RESULTS No surgical death was observed. During a median follow-up of 26 months, 11 patients developed MACEs (7.4% for myotomy vs. 40.9% for bypass surgery, p = 0.007). Surgical strategy (bypass surgery vs. myotomy) was an independent risk factor for MACEs (odds ratio = 3.681, 95% confidence interval 1.814-8.685, p = 0.011). Myotomy compared with bypass surgery had a significantly lower incidence of adverse angiographic results (3.7% of residual compression vs. 40.9% of LIMA graft failure, p = 0.003). Among ten patients suffering from LAD-MBs with concomitant proximal coronary stenosis who underwent bypass surgery, only one reported transient recurrent exertional chest pain, and all LIMA grafts were patent. CONCLUSIONS Myotomy of symptomatic LAD-MBs may be associated with encouraging midterm results. Bypass surgery may be recommended for treating symptomatic LAD-MBs with concomitant proximal coronary stenosis.
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Rajendran R, Hegde M. The prevalence of myocardial bridging on multidetector computed tomography and its relation to coronary plaques. Pol J Radiol 2019; 84:e478-e483. [PMID: 32082443 PMCID: PMC7016490 DOI: 10.5114/pjr.2019.90370] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 10/21/2019] [Indexed: 11/20/2022] Open
Abstract
PURPOSE To test the hypothesis that the prevalence of myocardial bridging varies between ethnic groups, and that the segment proximal to the myocardial bridge is more prone to plaque formation. MATERIAL AND METHODS A total of 4500 patients who had undergone computerised tomography (CT) coronary angiography at our institute were studied for myocardial bridging. Data on the clinical profile and indication for CT coronary angiography in myocardial bridging were collected. Patients with and without proximal disease were compared using the chi-square test for ordinal variables and Student's t-test for continuous variables. The length to depth ratio (RA-MA ratio) of the bridged segment was determined. RESULTS The prevalence of atherosclerotic plaques in the segment proximal to the bridged segment was 37.8%, which was lower than the prevalence of 48.7% for plaques in the corresponding segments among patients without myocardial bridging. The average length of the bridged segment was 15.5 ± 5 mm, and that for patients with and without proximal plaques was 13 ± 4 and 16 ± 6 mm (p = 0.1), respectively. Similarly, the average depth of the segments with and without proximal plaques was 1.8 ± 0.6 mm and 1.4 ± 0.5 mm (p = 0.06), respectively. Only the RA-MA ratio (8 ± 3 vs. 13 ± 6, p = 0.01) was significantly lower in patients with atherosclerotic plaques. CONCLUSIONS The prevalence in our study population was 10%, with mid left anterior descending artery (LAD) being the most common segment involved. Moreover, the prevalence and distribution of coronary plaques in LAD were similar in patients with and without myocardial bridging.
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Affiliation(s)
- Ravindran Rajendran
- Trichy SRM Medical College Hospital & Research Centre, Irungalur, Trichy, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Bangalore, India
| | - Madhav Hegde
- BGS Global Institute of Medical Sciences, Bangalore, India
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Arai R, Kano H, Suzuki S, Semba H, Arita T, Yagi N, Otsuka T, Matsuno S, Matsuhama M, Kato Y, Uejima T, Oikawa Y, Okumura Y, Yajima J, Yamashita T. Myocardial bridging is an independent predictor of positive spasm provocation testing by intracoronary ergonovine injections: a retrospective observational study. Heart Vessels 2019; 35:474-486. [PMID: 31562555 PMCID: PMC7085475 DOI: 10.1007/s00380-019-01518-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/20/2019] [Indexed: 12/28/2022]
Abstract
The relationship between myocardial bridging (MB) and coronary spasms during spasm provocation testing (SPT) remains unclear. We aimed to investigate whether MB was correlated with the SPT by ergonovine (ER) injections in a retrospective observational study. Of the 3340 patients who underwent a first coronary angiography, 166 underwent SPT using ER injections and were divided into 2 groups: MB(+) (n = 23), and MB(−) (n = 143). MB was defined as an angiographic reduction in the diameter of the coronary artery during systole. The patients who had severe organic stenosis in the left anterior descending coronary artery were excluded. The MB(+) group more frequently had diabetes mellitus and chronic kidney disease, and a thicker interventricular septum thickness. The rate of SPT-positivity was higher in the MB(+) group than MB(−) group (56.5% vs. 22.4%, P = 0.001). A multivariate regression analysis showed that the presence of MB was independently associated with SPT-positivity (odds ratio 5.587, 95% confidence interval 2.061–15.149, P = 0.001). In conclusion, coronary spasms during provocation tests with ER independently correlated with the MB. MB may predict coronary spasms.
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Affiliation(s)
- Riku Arai
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan.
| | - Hiroto Kano
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Shinya Suzuki
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Hiroaki Semba
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Takuto Arita
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Naoharu Yagi
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Takayuki Otsuka
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Shunsuke Matsuno
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Minoru Matsuhama
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Yuko Kato
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Tokuhisa Uejima
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Yuji Oikawa
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Yasuo Okumura
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Junji Yajima
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
| | - Takeshi Yamashita
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Nishiazabu 3-2-19, Minato-ku, Tokyo, 1060031, Japan
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Zhao DH, Fan Q, Ning JX, Wang X, Tian JY. Myocardial bridge-related coronary heart disease: Independent influencing factors and their predicting value. World J Clin Cases 2019; 7:1986-1995. [PMID: 31423430 PMCID: PMC6695549 DOI: 10.12998/wjcc.v7.i15.1986] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/12/2019] [Accepted: 07/03/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Myocardial bridge (MB) will compress the mural coronary artery (MCA) during the systole and cause myocardial ischemia. In the diagnosis of coronary heart disease (CHD), because the structure of MB is difficult to be observed by coronary angiography (CAG), the clinical study of the influence of MB on CHD is lacking. With the advancement of computed tomography coronary angiography technology, detailed observations of the MB anatomy have realized.
AIM To explore the main influencing factors of MB-related CHD and to find potential indicators for predicting MB-related CHD.
METHODS A total of 1718 patients with suspected CHD due to the symptoms of myocardial ischemia were enrolled as subjects. Patients diagnosed with CHD were included in a CHD group, and patients with no significant abnormalities were included in a control group. In the CHD group, patients were divided into an MB-CHD subgroup if MB-related CHD was found. In the control group, patients were divided into a simple MB subgroup if MB was found. The patient's clinical data and MB-related indicators, including the branch of MB, MB type (superficial/deep type), MB length, MB thickness, systolic and diastolic compression of the MCA, and MCA systolic stenosis rate were recorded and compared. Logistic regression analysis was used to explore the independent influencing factors of MD-related CHD. ROC curve was used to analyze the diagnostic efficacy of potential indicators for MB-related CHD.
RESULTS There were 1060 cases in the CHD group and 658 cases in the control group, and there were 236 cases in the MB-CHD subgroup and 52 cases in the simple MB subgroup. Multivariate logistic regression analysis showed that the combined MB had a significant effect on the occurrence of CHD (P < 0.05). MB thickness, systolic compression, diastolic compression, and MCA systolic stenosis rate had significant effects on the occurrence of MB-related CHD (P < 0.05). The area under the curve (AUC) of the combination of these influencing factors for the diagnosis of MB-related CHD was 0.959, which was significantly higher than the AUCs of the four indicators separately (P < 0.05). The sensitivity was 97.06% and the specificity was 87.63%.
CONCLUSION MB thickness, systolic compression, diastolic compression, and MCA systolic stenosis are independent influencing factors for MB-related CHD. The combination of these factors has potential diagnostic value for MB-related CHD.
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Affiliation(s)
- Dong-Hui Zhao
- Department of Cardiology, Beijing Anzhen Hospital Affiliated to Capital Medical University, Beijing 100029, China
| | - Qian Fan
- Department of Cardiology, Beijing Anzhen Hospital Affiliated to Capital Medical University, Beijing 100029, China
| | - Jun-Xia Ning
- Department of Cardiology, The First People's Hospital of Pingyuan County, Dezhou 253100, Shandong Province, China
| | - Xin Wang
- Department of Cardiology, Beijing Anzhen Hospital Affiliated to Capital Medical University, Beijing 100029, China
| | - Jia-Yu Tian
- Department of Cardiology, Beijing Anzhen Hospital Affiliated to Capital Medical University, Beijing 100029, China
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Nafakhi H, Al-Mosawi AA, Hassan MB, Hameed F, Alareedh M, Al-Shokry W. ECG changes and markers of increased risk of arrhythmia in patients with myocardial bridge. J Electrocardiol 2019; 56:90-93. [PMID: 31349132 DOI: 10.1016/j.jelectrocard.2019.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/20/2019] [Accepted: 07/15/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND The clinical significance and prognosis of myocardial bridge (MB) is still a matter of debate. OBJECTIVES To assess the novel ECG markers of T peak-to-end (Tp-e) interval, transmural dispersion of repolarization (TDR), is assessed by Tp-e/QT ratio, and index of electrophysiogical index(iCEB),is defined by QT/QRS ratio and changes (ST-T changes) in MB patients. PATIENTS AND METHODS Forty one patients who were diagnosed as having MB (MB group) and other 41 patients without MB (non-MB group) at multi-detector CT (MDCT) exam matched by age, sex were enrolled in the study. RESULTS iCEB was significantly increased in MB group in comparison to non-MB group particularly in patients with no coronary atherosclerosis (5.3 Vs 4.5, p = 0.04). Tp-e and TDR values were decreased in MB in comparison to non-MB patients particularly in patients with coronary atherosclerosis (69 Vs 80, p = 0.003 and 0.18 Vs 0.2, p = 0.01 respectively). Isolated T inversion in V1 was observed more in MB compared to non-MB patients (58% Vs 5%, p ≤ 0.0001) particularly in patients without coronary atherosclerosis. CONCLUSION MB patients have shown decreased Tp-e and TDR markers particularly in MB patients with coronary atherosclerosis.
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Affiliation(s)
- Hussein Nafakhi
- Internal Medicine Department, Medicine College, University of Kufa, Najaf, Iraq.
| | | | | | - Fatima Hameed
- Radiology Department, Medicine College, Kufa University, Najaf, Iraq
| | - Mohammed Alareedh
- Internal medicine department, Medicine College, University of Kufa, Najaf, Iraq.
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Rajmohan D, Sung YK, Kudelko K, Perez VDJ, Haddad F, Tremmel JA, Schnittger I, Zamanian RT, Spiekerkoetter E. EXPRESS: Myocardial Bridge - An Unrecognized Cause of Chest Pain in Pulmonary Arterial Hypertension. Pulm Circ 2019; 10:2045894019860738. [PMID: 31187693 PMCID: PMC7029537 DOI: 10.1177/2045894019860738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 06/05/2019] [Indexed: 11/22/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is characterized by an increased pulmonary vascular resistance resulting in progressive right ventricular hypertrophy and failure. While dyspnea on exertion is the leading symptom at diagnosis, the occurrence of chest pain, although less frequently observed, is an alarming symptom that requires immediate diagnostic work-up. Here we report the case of a 44-year-old woman with severe end-stage group 1 PAH who had repetitive occurrences of chest pain that led to frequent emergency room visits with documented signs of myocardial ischemia on EKG and troponin leaks. A computed tomography (CT) angiogram of the coronary arteries revealed the presence of a myocardial bridge (MB). An invasive coronary angiogram confirmed a MB over the left anterior descending (LAD) artery compressing the lumen of the LAD. As the patient was deteriorating on maximal medical PAH therapy, she was listed for, and subsequently received, a bilateral lung transplantation. Recognizing that the MB would pose a significant risk for ischemia during surgery as well as continuing source for chest pain after lung transplantation, the MB was surgically “unroofed” during the transplant surgery. The patient did well after surgery and did not complain of any residual chest pain. In conclusion, a MB compressing a segment of the coronary artery could be an under-diagnosed, but potentially not so rare cause of recurrent chest pain in PAH patients, which requires specialized diagnostic evaluation and treatment
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Affiliation(s)
- Divya Rajmohan
- Division Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Wall Center for Pulmonary Vascular Disease, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Yon K. Sung
- Division Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Kristina Kudelko
- Division Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Vinicio de Jesus Perez
- Division Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Francois Haddad
- Wall Center for Pulmonary Vascular Disease, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Jennifer A. Tremmel
- Wall Center for Pulmonary Vascular Disease, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Ingela Schnittger
- Wall Center for Pulmonary Vascular Disease, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Roham T. Zamanian
- Division Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Edda Spiekerkoetter
- Division Pulmonary and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
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