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Mahmoudi Hamidabad N, Kanaji Y, Ozcan I, Sara JDS, Ahmad A, Lerman LO, Lerman A. Prognostic Implications of Resistive Reserve Ratio in Patients With Nonobstructive Coronary Artery Disease With Myocardial Bridging. J Am Heart Assoc 2024; 13:e035000. [PMID: 39082414 DOI: 10.1161/jaha.124.035000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 07/08/2024] [Indexed: 08/07/2024]
Abstract
BACKGROUND Myocardial bridging (MB) is accompanied by the dynamic extravascular compression of epicardial coronary arteries, leading to intracoronary hemodynamic disturbance with abnormal coronary flow profiles. We aimed to evaluate the prognostic implications of resistive reserve ratio (RRR), a composite measure of flow and pressure parameters that represents the vasodilatory capacity of the coronary arteries, in patients with angina with nonobstructive coronary artery disease (ANOCA) and MB, in comparison with coronary flow reserve (CFR). METHODS AND RESULTS In this retrospective cohort study, we included patients with ANOCA who underwent coronary reactivity testing, where MB was identified by transient constriction in coronary artery segments between systole and diastole. Abnormal CFR and RRR were defined as <2.5 and <2.62, respectively. Major adverse cardiac events, including cardiovascular death, stroke, myocardial infarction, heart failure, and late revascularization, served as outcomes. Among 1251 patients with ANOCA, 191 (15.3%) had MB. The prevalence of abnormal CFR or RRR was not significantly different between patients with and without MB (P=0.144 and P=0.398, respectively). Over a median follow-up time of 6.9 years, abnormal RRR predicted major adverse cardiac events in patients with MB (hazard ratio [HR], 4.38 [95% CI, 1.71-11.21]; P=0.002) and without MB (HR, 1.91 [95% CI, 1.38-2.64]; P<0.001). Abnormal CFR predicted major adverse cardiac events in patients without MB (HR, 2.15 [95% CI, 1.54-3.00]; P<0.001), whereas it was not predictive of major adverse cardiac events in patients with MB (HR, 2.29 [95% CI, 0.93-5.65]; P=0.073). CONCLUSIONS In patients with ANOCA and MB, impaired RRR was superior to impaired CFR in distinguishing patients at a higher risk of future adverse events, suggesting that RRR may serve as a risk stratification tool in patients with MB and ANOCA.
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Affiliation(s)
| | - Yoshihisa Kanaji
- Department of Cardiovascular Medicine Mayo Clinic Rochester MN
- Division of Cardiovascular Medicine Tsuchiura Kyodo General Hospital Ibaraki Japan
| | - Ilke Ozcan
- Department of Cardiovascular Medicine Mayo Clinic Rochester MN
| | | | - Ali Ahmad
- Department of Cardiovascular Medicine Mayo Clinic Rochester MN
| | - Lilach O Lerman
- Division of Nephrology and Hypertension Mayo Clinic Rochester MN
| | - Amir Lerman
- Department of Cardiovascular Medicine Mayo Clinic Rochester MN
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2
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Açar B, Torun A, Celikyurt U, Talas Z, Yavuz S. Acute Myocardial Infarction Due to Myocardial Bridge Treated With Surgery: a Case Report. KARDIOLOGIIA 2023; 63:96-100. [PMID: 38088118 DOI: 10.18087/cardio.2023.11.n2063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/22/2022] [Indexed: 12/18/2023]
Abstract
Myocardial bridging is congenital anomaly characterized by segment of epicardial coronary arteries passing through the myocardium. Various ischemic conditions are related with this pathology. We report a case of myocardial bridging that was complicated with acute anterior myocardial infarction and a review of the literature. The patient was treated successfully with coronary bypass graft surgery after unsuccessful percutaneous intervention.
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3
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Gannon MP, Cerci RJ, Valdiviezo C, Ostovaneh MR, Vavere AL, de Vasconcellos HD, Matheson MB, Cox C, Miller JM, di Carli M, Arbab-Zadeh A, George RT, Lima JAC, Chen MY. Combined Computed Tomography Angiography-Computed Tomography Perfusion in the Identification and Prognostic Assessment of Myocardial Bridging from the CORE320 Study: 5-Year Follow-Up. Am J Cardiol 2023; 207:314-321. [PMID: 37774472 DOI: 10.1016/j.amjcard.2023.08.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 08/01/2023] [Accepted: 08/10/2023] [Indexed: 10/01/2023]
Abstract
Our objective is to use computed tomography angiography (CTA) and computed tomography perfusion (CTP) to identify the ischemic significance of myocardial bridging (MB). We also seek to determine the long-term prognostication of MB in the presence or absence of obstructive coronary artery disease (CAD). The CORE320, a prospective, multicenter study including 381 patients with known or suspected CAD clinically referred for invasive coronary angiography who underwent combined (CTA-CTP) and single-photon emission computed tomography before conventional coronary angiography. The incidence of MB was identified in 135 patients (35.4%) with 93.9% identified in the left anterior descending artery. MB were divided as partially encased versus fully encased. There was no difference in ischemia identified between partially encased MB and fully encased MB (37 [40%] vs 25 [35%], p = 0.54]. Ischemia was identified at similar rates in partially versus fully encased MB by single-photon emission computed tomography at (8 [9%] vs 8 [11%], p = 0.57] and CTP (34 [37%] vs 21 [30%], p = 0.33]. There was no difference in the primary outcome of 5-year outcome of combined incidence of myocardial infarction or death. The restricted mean survival time in patients with CTA with <50% stenosis with or without a MB was 4.906 years (95% confidence interval 4.759 to 5.000) and 4.891 years (95% confidence interval 4.718 to 5.000), respectively (p = 0.824). Cardiac computed tomography perfusion imaging can assess both anatomic and functional significance of myocardial bridging with diagnostic accuracy similar to current standard imaging. Furthermore, 5-year cardiovascular events were not different with the presence of MB in both obstructive and non-obstructive CAD.
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Affiliation(s)
- Michael P Gannon
- Lewis Katz School of Medicine, Temple University Hospital, Philadelphia, Pennsylvania; National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland.
| | | | - Carolina Valdiviezo
- Medstar Heart and Vascular Institute, Georgetown University, Washington, District of Columbia
| | | | - Andrea L Vavere
- Johns Hopkins Hospital and School of Medicine, Baltimore, Maryland
| | | | - Matthew B Matheson
- Johns Hopkins Hospital and School of Medicine, Baltimore, Maryland; Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Christopher Cox
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Julie M Miller
- Johns Hopkins Hospital and School of Medicine, Baltimore, Maryland
| | | | | | - Richard T George
- Johns Hopkins Hospital and School of Medicine, Baltimore, Maryland
| | - João A C Lima
- Johns Hopkins Hospital and School of Medicine, Baltimore, Maryland
| | - Marcus Y Chen
- National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland
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4
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Tsugu T, Tanaka K, Nagatomo Y, Belsack D, Devos H, Buls N, Cosyns B, Argacha JF, De Maeseneer M, De Mey J. Impact of coronary bifurcation angle on computed tomography derived fractional flow reserve in coronary vessels with no apparent coronary artery disease. Eur Radiol 2023; 33:1277-1285. [PMID: 36114847 PMCID: PMC9889442 DOI: 10.1007/s00330-022-09125-3] [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: 01/27/2022] [Revised: 07/04/2022] [Accepted: 08/19/2022] [Indexed: 02/04/2023]
Abstract
OBJECTIVES Computed tomography (CT) derived fractional flow reserve (FFRCT) decreases from the proximal to the distal part due to a variety of factors. The energy loss due to the bifurcation angle may potentially contribute to a progressive decline in FFRCT. However, the association of the bifurcation angle with FFRCT is still not entirely understood. This study aimed to investigate the impact of various bifurcation angles on FFRCT decline below the clinically crucial relevance of 0.80 in vessels with no apparent coronary artery disease (CAD). METHODS A total of 83 patients who underwent both CT angiography including FFRCT and invasive coronary angiography, exhibiting no apparent CAD were evaluated. ΔFFRCT was defined as the change in FFRCT from the proximal to the distal in the left anterior descending artery (LAD) and left circumflex artery (LCX). The bifurcation angle was calculated from three-dimensional volume rendered images. Vessel morphology and plaque characteristics were also assessed. RESULTS ΔFFRCT significantly correlated with the bifurcation angle (LAD angle, r = 0.35, p = 0.001; LCX angle, r = 0.26, p = 0.02) and vessel length (LAD angle, r = 0.30, p = 0.005; LCX angle, r = 0.49, p < 0.0001). In LAD, vessel length was the strongest predictor for distal FFRCT of ≤ 0.80 (β-coefficient = 0.55, p = 0.0003), immediately followed by the bifurcation angle (β-coefficient = 0.24, p = 0.02). The bifurcation angle was a good predictor for a distal FFRCT ≤ 0.80 (LAD angle, cut-off 31.0°, AUC 0.70, sensitivity 74%, specificity 68%; LCX angle, cut-off 52.6°, AUC 0.86, sensitivity 88%, specificity 85%). CONCLUSIONS In vessels with no apparent CAD, vessel length was the most influential factor on FFRCT, directly followed by the bifurcation angle. KEY POINTS • Both LAD and LCX bifurcation angles are factors influencing FFR CT. • Bifurcation angle is one of the predictors of a distal FFRCT of ≤ 0.80 and an optimal cut-off value of 31.0° for the LAD and 52.6° for the LCX. • Bifurcation angle should be taken into consideration when interpreting numerical values of FFRCT.
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Affiliation(s)
- Toshimitsu Tsugu
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
| | - Kaoru Tanaka
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
| | - Yuji Nagatomo
- Department of Cardiology, National Defense Medical College Hospital, Tokorozawa, Japan
| | - Dries Belsack
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
| | - Hannes Devos
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
| | - Nico Buls
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
| | - Bernard Cosyns
- Cardiology, Centrum voor Hart-en Vaatziekten, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Jean-François Argacha
- Cardiology, Centrum voor Hart-en Vaatziekten, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Michel De Maeseneer
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
| | - Johan De Mey
- Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium
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5
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Masi S, Rizzoni D, Taddei S, Widmer RJ, Montezano AC, Lüscher TF, Schiffrin EL, Touyz RM, Paneni F, Lerman A, Lanza GA, Virdis A. Assessment and pathophysiology of microvascular disease: recent progress and clinical implications. Eur Heart J 2021; 42:2590-2604. [PMID: 33257973 PMCID: PMC8266605 DOI: 10.1093/eurheartj/ehaa857] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 05/23/2020] [Accepted: 10/08/2020] [Indexed: 12/13/2022] Open
Abstract
The development of novel, non-invasive techniques and standardization of protocols to assess microvascular dysfunction have elucidated the key role of microvascular changes in the evolution of cardiovascular (CV) damage, and their capacity to predict an increased risk of adverse events. These technical advances parallel with the development of novel biological assays that enabled the ex vivo identification of pathways promoting microvascular dysfunction, providing novel potential treatment targets for preventing cerebral-CV disease. In this article, we provide an update of diagnostic testing strategies to detect and characterize microvascular dysfunction and suggestions on how to standardize and maximize the information obtained from each microvascular assay. We examine emerging data highlighting the significance of microvascular dysfunction in the development CV disease manifestations. Finally, we summarize the pathophysiology of microvascular dysfunction emphasizing the role of oxidative stress and its regulation by epigenetic mechanisms, which might represent potential targets for novel interventions beyond conventional approaches, representing a new frontier in CV disease reduction.
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Affiliation(s)
- Stefano Masi
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.,Institute of Cardiovascular Science, University College London, London, UK
| | - Damiano Rizzoni
- Clinica Medica, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy.,Division of Medicine, Istituto Clinico Città di Brescia, Brescia, Italy
| | - Stefano Taddei
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Robert Jay Widmer
- Division of Cardiovascular Diseases, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Augusto C Montezano
- Institute of Cardiovascular & Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK
| | - Thomas F Lüscher
- Heart Division, Royal Brompton and Harefield Hospital and Imperial College, London, UK.,Center for Molecular Cardiology, University of Zürich, Zürich, Switzerland
| | - Ernesto L Schiffrin
- Department of Medicine and Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, QC, Canada
| | - Rhian M Touyz
- Institute of Cardiovascular & Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK
| | - Francesco Paneni
- Center for Molecular Cardiology, University of Zürich, Zürich, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Zürich, Switzerland.,Department of Research and Education, University Hospital Zurich, Zürich, Switzerland
| | - Amir Lerman
- Division of Cardiovascular Diseases, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Gaetano A Lanza
- Department of Cardiovascular and Thoracic Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Agostino Virdis
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
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6
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Chen L, Chen Q, Zhong J, Ye Z, Ye M, Yan Y, Chen L, Luo Y. Effect of Low-Density Lipoprotein Cholesterol Goal Achievement on Vascular Physiology Evaluated by Quantitative Flow Ratio in Patients Who Underwent Percutaneous Coronary Intervention. Front Cardiovasc Med 2021; 8:679599. [PMID: 34222375 PMCID: PMC8249848 DOI: 10.3389/fcvm.2021.679599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/20/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose: The change in coronary physiology from lipid-lowering therapy (LLT) lacks an appropriate method of examination. Quantitative flow ratio (QFR) is a novel angiography-based approach allowing rapid assessment of coronary physiology. This study sought to determine the impact of low-density lipoprotein cholesterol (LDL-C) goal achievement on coronary physiology through QFR. Methods: Cases involving percutaneous coronary intervention (PCI) and 1-year angiographic follow-up were screened and assessed by QFR analysis. Patients were divided into two groups according to the LDL-C level at the 1-year follow-up: (1) goal-achievement group (LDL-C < 1.8 mmol/L or reduction of ≥50%, n = 146, lesion = 165) and (2) non-achievement group (n = 286, lesion = 331). All QFR data and major adverse cardiovascular and cerebrovascular events (MACCEs) at 1 year were compared between groups. Results: No differences between the groups in quantitative coronary angiography (QCA) data or QFR post-PCI were found. At the 1-year follow-up, lower percentage diameter stenosis (DS%) and percentage area stenosis (AS%) were recorded in the goal-achievement group (27.89 ± 10.16 vs. 30.93 ± 12.03, p = 0.010, 36.57 ± 16.12 vs. 41.68 ± 17.39, p = 0.003, respectively). Additionally, a better change in QFR was found in the goal-achievement group (0.003 ± 0.068 vs. -0.018 ± 0.086, p = 0.007), with a lower incidence of physiological restenosis and MACCEs (2.1 vs. 8.4%, p = 0.018, 5.4 vs. 12.6%, p = 0.021, respectively). Conclusion: Evaluated by QFR, patients who achieved the LDL-C goal appear to have a better coronary physiological benefit. This group of patients also has a better clinical outcome.
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Affiliation(s)
- Long Chen
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Qin Chen
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Jiaxin Zhong
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Zhen Ye
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Mingfang Ye
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Yuanming Yan
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Lianglong Chen
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
| | - Yukun Luo
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China.,Fujian Institute of Coronary Artery Disease, Fuzhou, China.,Fujian Heart Medical Center, Fuzhou, China
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7
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Zhong J, Chen Q, Chen L, Ye Z, Chen H, Sun J, Hong J, Ye M, Yan Y, Chen L, Luo Y. Physiological benefits evaluated by quantitative flow ratio in patients with reduced left ventricular ejection fraction who underwent percutaneous coronary intervention. BMC Cardiovasc Disord 2020; 20:523. [PMID: 33317462 PMCID: PMC7737262 DOI: 10.1186/s12872-020-01814-5] [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: 09/06/2020] [Accepted: 12/07/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To explore the clinical benefits of revascularization in patients with different levels of left ventricular ejection fraction (LVEF) from the perspective of quantitative flow ratio (QFR). METHODS Patients who underwent successful percutaneous coronary intervention (PCI) and one-year angiographic follow-up were retrospectively screened and computed by QFR analysis. Based on their LVEF, 301 eligible patients were classified into reduced LVEF (≤ 50%, n = 48) and normal LVEF (> 50%, n = 253) groups. Pre-PCI QFR, post-PCI QFR, follow-up QFR, late lumen loss (LLL), LVEF and major adverse cardiovascular and cerebrovascular events (MACCEs) at one year were compared between groups. RESULTS The reduced LVEF group had a lower mean pre-PCI QFR than the normal LVEF group (0.67 ± 0.16 vs. 0.73 ± 0.15, p = 0.004), but no significant difference was found in the post-PCI or one-year follow-up QFR. No association was found between LVEF and QFR at pre-PCI or follow-up. The reduced LVEF group had greater increases in QFR (0.27 ± 0.18 vs. 0.22 ± 0.15, p = 0.043) and LVEF (6.05 ± 9.45% vs. - 0.37 ± 8.11%, p < 0.001) than the normal LVEF group. The LLL results showed no difference between the two groups, indicating a similar degree of restenosis. The reduced LVEF group had a higher incidence of MACCEs (14.6% vs. 4.3%, p = 0.016), which was mainly due to the higher risk of heart failure (6.3% vs. 0%, p = 0.004). CONCLUSION Compared to the corresponding normal LVEF patients, patients with reduced LVEF who underwent successful PCI were reported to have greater increases in QFR and LVEF, a similar degree of restenosis, and a higher incidence of MACCEs due to a higher risk of heart failure. It seems that patients with reduced LVEF gain more coronary benefits from successful revascularization from the perspective of flow physiology evaluations.
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Affiliation(s)
- Jiaxin Zhong
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Qin Chen
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Long Chen
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Zhen Ye
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Huang Chen
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Jianmin Sun
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Juchang Hong
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Mingfang Ye
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Yuanming Yan
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China.,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China
| | - Lianglong Chen
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China. .,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China. .,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China.
| | - Yukun Luo
- Department of Cardiology, Fujian Medical University Union Hospital, No. 29 Xin Quan Road, Fuzhou, 350001, Fujian, People's Republic of China. .,Fujian Institute of Coronary Artery Disease, Fuzhou, 350001, Fujian, People's Republic of China. .,Fujian Heart Medical Center, Fuzhou, 350001, Fujian, People's Republic of China.
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8
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Qi Q, Liu G, Yuan Z, Liu L, Tu S, Zhao Q. Quantitative flow ratio-guided surgical intervention in symptomatic myocardial bridging. Cardiol J 2020; 27:685-692. [PMID: 31909471 DOI: 10.5603/cj.a2019.0113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 09/26/2019] [Accepted: 11/30/2019] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Patients with myocardial bridging (MB) are associated with adverse cardiovascular events, but a decision to perform surgical intervention, especially for patients with systolic intermediate stenosis, is a difficult clinical issue. Fractional flow reserve (FFR) represents a novel method for the functional evaluation of coronary stenosis, but the relationship between FFR and MB remains controversial because of the cyclic dynamic stenosis of MB. Quantitative flow ratio (QFR) is a novel index allowing fast assessment of FFR from a diagnostic coronary angiography. This study aimed to investigate the relationship between QFR and MB patients and to further develop a prediction model of QFR-guided surgical intervention for these patients. METHODS Forty-five symptomatic lone MB patients who had undergone coronary angiography were consecutively enrolled in this study. MB was located in the middle of left anterior descending artery with intermediate stenosis during systole. The patients were retrospectively divided into a medical therapy group or a surgical therapy group. Systolic geometry based QFR (SG-QFR) and diastolic geometry based QFR (DG-QFR) were calculated based on three-dimensional quantitative coronary angiography and patient-specific flow velocity. Subsequently, time-averaged QFR (TA-QFR) is defined as the average of SG-QFR and DG-QFR. RESULTS Receiver operating characteristic curve analysis revealed that TA-QFR (AUC = 0.91; 95% CI: 0.79-0.98) was found to be the best pre-operative index for surgical intervention to MB, when compared with DG-QFR (AUC = 0.69; 95% CI: 0.53-0.82; difference: 0.22; 95% CI: 0.04-0.41; p = 0.02) and SG-QFR (AUC = 0.87; 95% CI: 0.74-0.95; difference: 0.04; 95% CI: 0.00-0.08; p = 0.03). CONCLUSIONS TA-QFR improved the performance of functional evaluation in MB patients with intermediate stenosis during systole and is useful for guiding surgical intervention.
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Affiliation(s)
- Quan Qi
- First Hospital of Lanzhou University.
| | - Gang Liu
- Department of Cardiology, Yuyao People's Hospital
| | - Zhize Yuan
- Department of Cardiac Surgery, RuiJin Hospital
| | - Lili Liu
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University
| | - Shengxian Tu
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University
| | - Qiang Zhao
- Department of Cardiac Surgery, RuiJin Hospital
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9
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Ozaki Y, Gonzalo N, Salazar CH, Kuku KO, Mejía-Rentería H, Hideo-Kajita A, Núñez-Gil IJ, Escaned J, Waksman R, Garcia-Garcia HM. Comparison of quantitative flow ratio value of left anterior descending and circumflex coronary artery in patients with Takotsubo syndrome. Int J Cardiovasc Imaging 2019; 36:3-8. [PMID: 31578638 DOI: 10.1007/s10554-019-01703-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 09/17/2019] [Indexed: 01/27/2023]
Abstract
Takotsubo syndrome (TTS) is an acute cardiac event without epicardial coronary obstruction but often with reversible ventricular motion abnormalities. Quantitative flow ratio (QFR) is a novel approach to evaluate the coronary stenosis significance on the basis of 3-dimensional quantitative coronary angiography (3D-QCA) and contrast flow by Thrombolysis in Myocardial Infarction frame count. This study aimed to evaluate and compare the QFR value in the left anterior descending artery (LAD) and the left circumflex artery (LCx) in patients with TTS. This retrospective and observational study enrolled 30 patients with TTS who underwent coronary angiography. We evaluated the QFR data using the 3D-QCA analysis and compared the QFR data in the LAD and the LCx. No significant differences were observed in terms of flow velocity, percent diameter stenosis, minimum lumen diameter, and reference diameter between LAD and LCx. However, vessel QFR in the LAD was significantly reduced compared with that in the LCx (0.98 [0.94 to 0.99] vs. 1.00 [0.99 to 1.00], P < 0.001). Ejection fraction at baseline and initial troponin-I levels were not correlated with the vessel QFR both in the LAD and the LCx. The QFR value in the LAD was significantly reduced compared to that in the LCx in patients with TTS.
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Affiliation(s)
- Yuichi Ozaki
- Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, DC, USA
| | - Nieves Gonzalo
- Interventional Cardiology, IdISSC, Hospital Clinico San Carlos, Madrid, Spain
| | | | - Kayode O Kuku
- Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, DC, USA
| | | | - Alexandre Hideo-Kajita
- Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, DC, USA
| | - Iván J Núñez-Gil
- Interventional Cardiology, IdISSC, Hospital Clinico San Carlos, Madrid, Spain
| | - Javier Escaned
- Interventional Cardiology, IdISSC, Hospital Clinico San Carlos, Madrid, Spain
| | - Ron Waksman
- Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA
| | - Hector M Garcia-Garcia
- Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA.
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, DC, USA.
- Section of Interventional Cardiology, MedStar Washington Hospital Center, 110 Irving Street NW, Suite 4B-1, Washington, DC, 20010, USA.
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10
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Cardiovascular Outcome Trials of Diabetes and Obesity Drugs: Implications for Conditional Approval and Early Phase Clinical Development. Pharmaceut Med 2017. [DOI: 10.1007/s40290-017-0209-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Hostiuc S, Rusu MC, Hostiuc M, Negoi RI, Negoi I. Cardiovascular consequences of myocardial bridging: A meta-analysis and meta-regression. Sci Rep 2017; 7:14644. [PMID: 29116137 PMCID: PMC5677117 DOI: 10.1038/s41598-017-13958-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 10/02/2017] [Indexed: 01/18/2023] Open
Abstract
Myocardial bridging, a congenital abnormality in which a coronary artery tunnels through the myocardial fibres was usually considered a benign condition. Many studies suggested a potential hemodynamic significance of myocardial bridging and some, usually case reports, implied a possible correlation between it and various cardiovascular pathologies like acute myocardial infarction, ventricular rupture, life-threatening arrhythmias, hypertrophic cardiomyopathy, apical ballooning syndrome or sudden death. The main objective of this article is to evaluate whether myocardial bridging may be associated with significant cardiac effects or if it is strictly a benign anatomical variation. To this purpose, we performed a meta-analysis (performed using the inverse variance heterogeneity model) and meta-regression, on scientific articles selected from three main databases (Scopus, Web of Science, Pubmed). The study included 21 articles. MB was associated with major adverse cardiac events - OR = 1.52 (1.01–2.30), and myocardial ischemia OR = 3.00 (1.02–8.82) but not with acute myocardial infarction, cardiovascular death, ischemia identified using imaging techniques, or positive exercise stress testing. Overall, myocardial bridging may have significant cardiovascular consequences (MACE, myocardial ischemia). More studies are needed to reveal/refute a clear association with MI, sudden death or other cardiovascular pathologies.
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Affiliation(s)
- Sorin Hostiuc
- Department of Legal Medicine and Bioethics, Department 2 Morphological Sciences, Faculty of Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
| | - Mugurel Constantin Rusu
- Division of Anatomy, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.,MEDCENTER, Centre of Excellence in Laboratory Medicine and Pathology, Bucharest, Romania
| | - Mihaela Hostiuc
- Department of Internal Medicine and Gastroenterology, Faculty of Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania
| | - Ruxandra Irina Negoi
- Department of Anatomy, Faculty of Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania
| | - Ionuț Negoi
- Department of Surgery, Faculty of Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania
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12
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Hashikata T, Tojo T, Muramatsu Y, Sato T, Kakizaki R, Nemoto T, Fujiyoshi K, Namba S, Kitasato L, Hashimoto T, Kameda R, Shimohama T, Yamaoka-Tojo M, Ako J. Lower Level of Low Density Lipoprotein Cholesterol is Associated with a Higher Increase in the Fractional Flow Reserve in Patients with Fixed-dose Rosuvastatin. J Atheroscler Thromb 2017; 25:233-243. [PMID: 28824048 PMCID: PMC5868509 DOI: 10.5551/jat.39560] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Aim: Fractional flow reserve (FFR) reflects on the diffuse atherosclerosis per coronary artery. It is unknown whether the statin therapy affects long term FFR after stenting. The aim of this study was to evaluate the long term FFR after stent implantation in patients who are intaking fixed-dose rosuvastatin. Methods: A total of 22 patients with stable angina pectoris were enrolled. The values of FFR were measured before, immediately after, and 18 months after (follow-up day) the implantation of everolimus eluting stent (EES; Promus Element™ or Promus Element Plus™). A fixed dose of rosuvastatin at 5 mg/day was administrated to all patients. Results: Of the 22 patients, 2 were excluded because of adverse effect of rosuvastatin and in-stent total occlusion after EES implantation. Overall, the values of FFR immediately after and 18 months after EES implantation did not show significant change (from 0.90 ± 0.05 to 0.88 ± 0.06, p = 0.16). However, there was a significant negative correlation between low density lipoprotein (LDL) cholesterol level at follow-up day and changes in the value of FFR (p = 0.01, r = −0.74). There was an increase in the FFR value after stenting in 8 out of 9 patients with LDL cholesterol level below 75 mg/dl (area under the curve 0.92, p = 0.0005). Conclusions: LDL cholesterol level was associated with the change in the FFR value in patients following stent implantation. Lower LDL cholesterol tended to improve in the long-term FFR, underscoring the importance of lowering LDL cholesterol to prevent the progression of coronary atherosclerosis.
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Affiliation(s)
- Takehiro Hashikata
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Taiki Tojo
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Yusuke Muramatsu
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Toshimitsu Sato
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Ryota Kakizaki
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Teruyoshi Nemoto
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Kazuhiro Fujiyoshi
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Sayaka Namba
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Lisa Kitasato
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Takuya Hashimoto
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Ryo Kameda
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Takao Shimohama
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Minako Yamaoka-Tojo
- Department of Rehabilitation, Kitasato University School of Allied Health Sciences
| | - Junya Ako
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
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13
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Matsuo H, Kawase Y. FFR and iFR guided percutaneous coronary intervention. Cardiovasc Interv Ther 2016; 31:183-95. [DOI: 10.1007/s12928-016-0404-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 05/14/2016] [Indexed: 01/15/2023]
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14
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Liu Z, Matsuzawa Y, Herrmann J, Li J, Lennon RJ, Crusan DJ, Kwon TG, Zhang M, Sun T, Yang S, Gulati R, Bell MR, Lerman LO, Lerman A. Relation between fractional flow reserve value of coronary lesions with deferred revascularization and cardiovascular outcomes in non-diabetic and diabetic patients. Int J Cardiol 2016; 219:56-62. [PMID: 27281577 DOI: 10.1016/j.ijcard.2016.05.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/03/2016] [Accepted: 05/12/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND FFR of deferred PCI lesions can predict future cardiovascular events. However, the prognostic utility of FFR remains unclear in diabetic patients in view of the potential impact of the diffuse nature of vascular disease process. We aimed to study the relation between fractional flow reserve (FFR) values and long-term outcomes of diabetic and non-diabetic patients with deferred percutaneous coronary intervention (PCI). METHODS Patients with FFR assessment and deferred PCI (n=630) were enrolled and stratified according to diabetes mellitus (DM) status and FFR values. Patients were followed over a median of 39months. Cox proportional hazard regression models were used to analyze the association between clinical endpoints and clinical factors such as DM and FFR. RESULTS In non-diabetics (n=450), higher FFR values were associated with less cardiovascular events (hazard ratio (HR) for death and myocardial infarction (MI) [95% confidence interval (CI)], 0.61[0.44 to 0.86] per 0.1 increase in FFR, p=0.007; HR for revascularization [95%CI], 0.66[0.49 to 0.9] per 0.1 increase in FFR, p=0.006). In diabetics (n=180), there was no difference in death and MI across the range of FFR values. Among those patients with an FFR >0.85, diabetics had a more than two-fold higher risk of death and MI than non-diabetics (HR [95% CI], 2.20 [1.19 to 4.01], p=0.015). CONCLUSION Among non-diabetic patients with deferred PCI, a higher FFR was associated with lower rates of death, MI and revascularization. On the contrary in diabetic patients with deferred revascularization, FFR was not able to differentiate the risk of cardiovascular events.
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Affiliation(s)
- Zhi Liu
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA; Division of Cardiology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Yasushi Matsuzawa
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Joerg Herrmann
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Jing Li
- Division of Cardiology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Ryan J Lennon
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Daniel J Crusan
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Taek-Geun Kwon
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Ming Zhang
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Tao Sun
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Shiwei Yang
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Rajiv Gulati
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Malcolm R Bell
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
| | - Amir Lerman
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA.
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15
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Faccini A, Agricola E, Oppizzi M, Margonato A, Galderisi M, Sabbadini MG, Franchini S, Camici PG. Coronary Microvascular Dysfunction in Asymptomatic Patients Affected by Systemic Sclerosis – Limited vs. Diffuse Form –. Circ J 2015; 79:825-9. [DOI: 10.1253/circj.cj-14-1114] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alessia Faccini
- Vita-Salute San Raffaele University and San Raffaele Scientific Institute
| | - Eustachio Agricola
- Vita-Salute San Raffaele University and San Raffaele Scientific Institute
| | - Michele Oppizzi
- Vita-Salute San Raffaele University and San Raffaele Scientific Institute
| | - Alberto Margonato
- Vita-Salute San Raffaele University and San Raffaele Scientific Institute
| | | | | | - Stefano Franchini
- Vita-Salute San Raffaele University and San Raffaele Scientific Institute
| | - Paolo G Camici
- Vita-Salute San Raffaele University and San Raffaele Scientific Institute
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16
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Aparci M, Ozturk C, Balta S, Okutucu S, Isilak Z. Hypercholesterolemia is Accounted for Atherosclerosis at the Proximal Arterial Segments of Myocardial Bridging. Clin Appl Thromb Hemost 2014; 22:297-302. [DOI: 10.1177/1076029614554995] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Arterial shear stress was generally implicated in the development of atherosclerotic plaque (AP). Atherosclerotic plaque may be associated with myocardial bridging (MB). We evaluated the metabolic abnormalities which could determine the localization of AP at the proximal coronary segment of MB. We analyzed the patients with MB, AP&MB, and AP on left anterior descending (LAD) artery who were diagnosed by multislice computed tomography coronary angiography. Serum levels of metabolic parameters were compared among study groups. Patients with MB&AP and AP were significantly older than those in the MB group. Patients with MB&AP had AP and MB at the proximal and middle segments of LAD artery, respectively. Total cholesterol, low-density lipoprotein (LDL) cholesterol and very LDL, and triglyceride levels were significantly higher in patients with MB&AP and AP compared to only MB. Low-density lipoprotein cholesterol was significantly correlated with the type of coronary artery disease in multiple regression analysis. Myocardial bridging may be an anatomical determinant for the localization of AP proximal to itself in the presence of hypercholesterolemia.
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Affiliation(s)
- Mustafa Aparci
- Department of Cardiology, Etimesgut Military Hospital, Ankara, Turkey
| | - Cengiz Ozturk
- Department of Cardiology, Gulhane Military Medical Faculty, Ankara, Turkey
| | - Sevket Balta
- Department of Cardiology, Eskisehir Military Hospital, Ankara, Turkey
| | - Sercan Okutucu
- Department of Cardiology, Etimesgut Military Hospital, Ankara, Turkey
| | - Zafer Isilak
- Department of Cardiology, Haydarpasa Training Medicine, Istanbul, Turkey
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17
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Widmer RJ, Lerman A. Endothelial dysfunction and cardiovascular disease. Glob Cardiol Sci Pract 2014; 2014:291-308. [PMID: 25780786 PMCID: PMC4352682 DOI: 10.5339/gcsp.2014.43] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 09/11/2014] [Indexed: 12/19/2022] Open
Affiliation(s)
- R Jay Widmer
- Division of Cardiovascular Diseases, Department of Internal Medicine, Mayo Clinic and College of Medicine, Rochester, MN 55905, USA
| | - Amir Lerman
- Division of Cardiovascular Diseases, Department of Internal Medicine, Mayo Clinic and College of Medicine, Rochester, MN 55905, USA
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18
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Stiermaier T, Desch S, Blazek S, Schuler G, Thiele H, Eitel I. Frequency and significance of myocardial bridging and recurrent segment of the left anterior descending coronary artery in patients with takotsubo cardiomyopathy. Am J Cardiol 2014; 114:1204-9. [PMID: 25175156 DOI: 10.1016/j.amjcard.2014.07.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/05/2014] [Accepted: 07/05/2014] [Indexed: 10/25/2022]
Abstract
Despite intensive research efforts, the causative mechanisms of takotsubo cardiomyopathy (TC) are still unknown. Recently, morphologic characteristics of the left anterior descending coronary artery (LAD) have been proposed as a potential pathophysiological substrate. Hence, the aim of the present study was to evaluate the prevalence of myocardial bridging and LAD recurrent segments in a large cohort of patients with TC. A total of 161 patients with TC were matched for age and gender with 161 controls without coronary artery or valvular heart disease. Myocardial bridging was diagnosed according to indirect signs in coronary angiography. Furthermore, the LAD was evaluated regarding parts of the vessel outreaching the left ventricular apex (LAD recurrent segment). The prevalence of myocardial bridging was similar in the TC and control groups (11.8% vs 6.8%, p = 0.18). Any part of the LAD outreaching the left ventricular apex was observed in 55.6% of patients with TC compared with 35.4% in the control population (p <0.001). Moreover, the LAD supplied ≥ 25% of the inferior myocardial wall in 21 patients with TC (13.1%), whereas patients in the control group did not show this pattern of coronary circulation at all (p <0.001). Patients with TC with typical apical ballooning compared with those with atypical ballooning patterns demonstrated a higher prevalence of myocardial bridging (p = 0.04) but not LAD recurrent segments (p = 0.28). In conclusion, the prevalence of myocardial bridging in patients with TC is low and comparable with that in a matched control group. In contrast, LAD recurrent segments are significantly more frequent in patients with TC.
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