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Zheng G, Li Y, Takayama T, Nishida T, Sudo M, Haruta H, Fukamachi D, Okubo K, Higuchi Y, Hiro T, Saito S, Hirayama A. The Spatial Distribution of Plaque Vulnerabilities in Patients with Acute Myocardial Infarction. PLoS One 2016; 11:e0152825. [PMID: 27031514 PMCID: PMC4816424 DOI: 10.1371/journal.pone.0152825] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 03/03/2016] [Indexed: 11/28/2022] Open
Abstract
Objective Although the plaque characteristics have been recognized in patients with acute myocardial infarction (AMI), the plaque spatial distribution is not well clarified. Using color-mapping intravascular ultrasound (iMAP-IVUS), we examined culprit lesions to clarify plaque morphology, composition and spatial distribution of the sites of potential vulnerability. Methods Sixty-eight culprit lesions in 64 consecutive AMI patients who underwent angiography and IVUS examinations before intervention were analyzed. Plaque morphology and composition were quantified with iMAP-IVUS. The spatial distribution of the sites of potential vulnerability was assessed with longitudinal reconstruction of the consecutive IVUS images. The plaque characteristics were also compared between ruptured and non-ruptured lesions, and between totally occlusive (TO) and non-TO lesions. Results The sites with maximum necrotic area (maxNA), maximum plaque burden (maxPB) and most severely narrowed (minimal luminal area, MLA) were recognized vulnerability. In the majority of cases, maxNA sites were proximal to the maxPB sites, and MLA sites were distal to the maxNA and maxPB sites. Ruptures usually occurred close to maxNA sites and proximal to maxPB and MLA sites. The average distance from the site of rupture to the maxNA site was 0.33 ± 4.04 mm. Ruptured lesions showed significant vessel remodeling, greater plaque volume, and greater lipidic volume compared to those of non-ruptured lesions. Both the length and plaque burden (PB) of TO lesions were greater than those of non-TO lesions. Conclusions Instead of overlapping on maxPB sites, most maxNA sites are proximal to the maxPB sites and are the sites most likely to rupture. Plaque morphology and composition play critical roles in plaque rupture and coronary occlusion.
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Affiliation(s)
- Guian Zheng
- Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine, Tokyo, 173-8610, Japan
- Department of Cardiology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou, 363000, Fujian, China
| | - Yuxin Li
- Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine, Tokyo, 173-8610, Japan
- * E-mail:
| | - Tadateru Takayama
- Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine, Tokyo, 173-8610, Japan
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Toshihiko Nishida
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Mitsumasa Sudo
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Hironori Haruta
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Daisuke Fukamachi
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Kimie Okubo
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Yoshiharu Higuchi
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Takafumi Hiro
- Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine, Tokyo, 173-8610, Japan
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Satoshi Saito
- Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Atsushi Hirayama
- Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine, Tokyo, 173-8610, Japan
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
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Silva Marques J, Pinto FJ. The vulnerable plaque: current concepts and future perspectives on coronary morphology, composition and wall stress imaging. Rev Port Cardiol 2014; 33:101-10. [PMID: 24513090 DOI: 10.1016/j.repc.2013.07.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 07/22/2013] [Indexed: 12/17/2022] Open
Abstract
Cardiovascular imaging plays an important role in the identification and characterization of the vulnerable plaque. A major goal is the ability to identify individuals at risk of plaque rupture and developing an acute coronary syndrome. Early recognition of rupture-prone atherosclerotic plaques may lead to the development of pharmacologic and interventional strategies to reduce acute coronary events. We review state-of-the-art cardiovascular imaging for identification of the vulnerable plaque. There is ample evidence of a close relationship between plaque morphology and patient outcome, but molecular imaging can add significant information on tissue characterization, inflammation and subclinical thrombosis. Additionally, identifying arterial wall exposed to high shear stress may further identify rupture-prone arterial segments. These new modalities may help reduce the individual, social and economic burden of cardiovascular disease.
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Affiliation(s)
- João Silva Marques
- University Hospital Santa Maria, Department of Cardiology I, Lisbon Academic Medical Centre, CCUL, Lisbon, Portugal.
| | - Fausto J Pinto
- University Hospital Santa Maria, Department of Cardiology I, Lisbon Academic Medical Centre, CCUL, Lisbon, Portugal
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Kubo T, Akasaka T. Recent advances in intracoronary imaging techniques: focus on optical coherence tomography. Expert Rev Med Devices 2014; 5:691-7. [DOI: 10.1586/17434440.5.6.691] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takashi Kubo
- Department of Cardiovascular Medicine, Wakayama Medical University, 811-1, Kimiidera, Wakayama, 641-8509, Japan
| | - Takashi Akasaka
- Department of Cardiovascular Medicine, Wakayama Medical University, 811-1, Kimiidera, Wakayama, 641-8509, Japan
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Wong KK, Thavornpattanapong P, Cheung SC, Sun Z, Tu J. Effect of calcification on the mechanical stability of plaque based on a three-dimensional carotid bifurcation model. BMC Cardiovasc Disord 2012; 12:7. [PMID: 22336469 PMCID: PMC3310807 DOI: 10.1186/1471-2261-12-7] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 02/15/2012] [Indexed: 11/28/2022] Open
Abstract
Background This study characterizes the distribution and components of plaque structure by presenting a three-dimensional blood-vessel modelling with the aim of determining mechanical properties due to the effect of lipid core and calcification within a plaque. Numerical simulation has been used to answer how cap thickness and calcium distribution in lipids influence the biomechanical stress on the plaque. Method Modelling atherosclerotic plaque based on structural analysis confirms the rationale for plaque mechanical examination and the feasibility of our simulation model. Meaningful validation of predictions from modelled atherosclerotic plaque model typically requires examination of bona fide atherosclerotic lesions. To analyze a more accurate plaque rupture, fluid-structure interaction is applied to three-dimensional blood-vessel carotid bifurcation modelling. A patient-specific pressure variation is applied onto the plaque to influence its vulnerability. Results Modelling of the human atherosclerotic artery with varying degrees of lipid core elasticity, fibrous cap thickness and calcification gap, which is defined as the distance between the fibrous cap and calcification agglomerate, form the basis of our rupture analysis. Finite element analysis shows that the calcification gap should be conservatively smaller than its threshold to maintain plaque stability. The results add new mechanistic insights and methodologically sound data to investigate plaque rupture mechanics. Conclusion Structural analysis using a three-dimensional calcified model represents a more realistic simulation of late-stage atherosclerotic plaque. We also demonstrate that increases of calcium content that is coupled with a decrease in lipid core volume can stabilize plaque structurally.
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Affiliation(s)
- Kelvin Kl Wong
- School of Aerospace, Mechanical and Manufacturing Engineering, and Health Innovations Research Institute (HIRi), RMIT University, Australia
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Suh WM, Seto AH, Margey RJP, Cruz-Gonzalez I, Jang IK. Intravascular detection of the vulnerable plaque. Circ Cardiovasc Imaging 2011; 4:169-78. [PMID: 21406663 DOI: 10.1161/circimaging.110.958777] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- William M Suh
- Cardiology Division, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
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9
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Toutouzas K, Drakopoulou M, Synetos A, Stefanadis C. Intravascular Thermography for Assessing Vulnerable Plaques. CURRENT CARDIOVASCULAR IMAGING REPORTS 2010. [DOI: 10.1007/s12410-010-9032-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wann S, Tunio J. Current challenges and future directions in cardiac imaging. J Saudi Heart Assoc 2010; 22:121-4. [PMID: 23960604 PMCID: PMC3727514 DOI: 10.1016/j.jsha.2010.04.010] [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: 03/29/2010] [Accepted: 04/21/2010] [Indexed: 11/23/2022] Open
Abstract
Imaging is one of the most important accomplishments of medicine during the last 1000 years. The contribution of modern imaging to progress in the delivery of health care is unquestioned. However, we need to refine our use of imaging, limiting its use to those occasions when it can contribute directly or indirectly to improving and lengthening the lives of patients. Technology prowess in imaging alone is not sufficient to deliver value to individuals or to society. Continued investment in imaging technology requires critical appraisal of its use in clinical decision making and patient outcomes.
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Affiliation(s)
- Samuel Wann
- Wheaton Franciscan Medical Group, Milwaukee, WI, United States
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White AJ, Duffy SJ, Walton AS, Mukherjee S, Shaw JA, Jennings GL, Dart AM, Kingwell BA. Compliance mismatch between stenotic and distal reference segment is associated with coronary artery disease instability. Atherosclerosis 2009; 206:179-85. [DOI: 10.1016/j.atherosclerosis.2009.02.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Revised: 02/01/2009] [Accepted: 02/16/2009] [Indexed: 10/21/2022]
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Hammer-Hansen S, Kofoed KF, Kelbaek H, Kristensen T, Kühl JT, Thune JJ, Køber L. Volumetric evaluation of coronary plaque in patients presenting with acute myocardial infarction or stable angina pectoris-a multislice computerized tomography study. Am Heart J 2009; 157:481-7. [PMID: 19249418 DOI: 10.1016/j.ahj.2008.10.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2008] [Accepted: 10/16/2008] [Indexed: 11/19/2022]
Abstract
BACKGROUND We hypothesized that unstable clinical presentation of coronary artery disease is associated with distinct characteristics of culprit lesions identifiable by multislice computed tomography (MSCT). METHODS Patients with non-ST-elevation myocardial infarction (NSTEMI) (n = 57) or stable angina (SA) pectoris (n = 19) were studied. Coronary culprit lesions in patients with NSTEMI and symptomatic lesions in patients with SA were evaluated with 64-slice MSCT and a volumetric plaque imaging tool. Plaque volumes of lipid, fibrous tissue, or calcification according to signal intensity were determined. Plaque burden, mean signal intensity of the lesions, relative volumetric distribution of plaque components, and remodeling index were measured. RESULTS Volumetric plaque burden of study lesions were similar in the 2 patient groups (P = .38). Mean signal intensity of study lesions were lower in patients with NSTEMI compared with patients with SA (74 [66-97] Hounsfield units vs 99 [77-154] Hounsfield units, P = .02). The volume of plaque occupied by calcified material was lower in patients with NSTEMI compared with patients with SA (15 mm(3) [3-58 mm(3)] vs 42 mm(3) [18-82 mm(3)], P = .045). In patients with NSTEMI, the lipid-rich plaque subtype was more frequent than in patients with SA, and the calcified plaque subtype was less frequent in patients with NSTEMI than in patients with SA (P = .032). Positive remodeling was observed in 19% of patients with NSTEMI, whereas this was absent in patients with SA (P = .04). CONCLUSION Volumetric measurements with MSCT revealed that coronary culprit lesions in acute coronary syndrome frequently display low mean plaque signal intensity values, lipid-rich plaque subtype, and positive remodeling.
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Affiliation(s)
- Sophia Hammer-Hansen
- The Department of Cardiology, The Heart Center, Rigshospitalet, University of Copenhagen, Denmark
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