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Silva TQAC, Pezel T, Jerosch-Herold M, Coelho-Filho OR. The Role and Advantages of Cardiac Magnetic Resonance in the Diagnosis of Myocardial Ischemia. J Thorac Imaging 2023; 38:235-246. [PMID: 36917509 DOI: 10.1097/rti.0000000000000701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
Ischemic heart disease continues to be the leading cause of death and disability worldwide. For the diagnosis of ischemic heart disease, some form of cardiac stress test involving exercise or pharmacological stimulation continues to play an important role, despite advances within modalities like computer tomography for the noninvasive detection and characterization of epicardial coronary lesions. Among noninvasive stress imaging tests, cardiac magnetic resonance (CMR) combines several capabilities that are highly relevant for the diagnosis of ischemic heart disease: assessment of wall motion abnormalities, myocardial perfusion imaging, and depiction of replacement and interstitial fibrosis markers by late gadolinium enhancement techniques and T1 mapping. On top of these qualities, CMR is also well tolerated and safe in most clinical scenarios, including in the presence of cardiovascular implantable devices, while in the presence of renal disease, gadolinium-based contrast should only be used according to guidelines. CMR also offers outstanding viability assessment and prognostication of cardiovascular events. The last 2019 European Society of Cardiology guidelines for chronic coronary syndromes has positioned stress CMR as a class I noninvasive imaging technique for the diagnosis of coronary artery disease in symptomatic patients. In the present review, we present the current state-of-the-art assessment of myocardial ischemia by stress perfusion CMR, highlighting its advantages and current shortcomings. We discuss the safety, clinical, and cost-effectiveness aspects of gadolinium-based CMR-perfusion imaging for ischemic heart disease assessment.
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Affiliation(s)
- Thiago Quinaglia A C Silva
- Discipline of Cardiology, Faculty of Medical Science-State University of Campinas-UNICAMP, Campinas, São Paulo, Brazil
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, MD
| | - Théo Pezel
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, MD
- Department of Cardiology, University of Paris, CHU Lariboisière, Inserm, UMRS 942, Paris, France
| | - Michael Jerosch-Herold
- Noninvasive Cardiovascular Imaging Program and Department of Radiology, Brigham and Women's Hospital, Boston, MA
| | - Otávio R Coelho-Filho
- Discipline of Cardiology, Faculty of Medical Science-State University of Campinas-UNICAMP, Campinas, São Paulo, Brazil
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Li XM, Jiang L, Min CY, Yan WF, Shen MT, Liu XJ, Guo YK, Yang ZG. Myocardial Perfusion Imaging by Cardiovascular Magnetic Resonance: Research Progress and Current Implementation. Curr Probl Cardiol 2023; 48:101665. [PMID: 36828047 DOI: 10.1016/j.cpcardiol.2023.101665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023]
Abstract
Cardiovascular diseases pose a significant health and economic burden worldwide, with coronary artery disease still recognized as a major problem. It is closely associated with hypertension, diabetes, obesity, smoking, lack of exercise, poor diet, and excessive alcohol consumption, which may lead to macro- and microvascular abnormalities in the heart. Coronary artery stenosis reduces the local supply of oxygen and nutrients to the myocardium and results in reduced levels of myocardial perfusion, which can lead to more severe conditions and irreversible damage to myocardial tissues. Therefore, accurate evaluation of myocardial perfusion abnormalities in patients with these risk factors is critical. As technology advances, magnetic resonance myocardial perfusion imaging has become more accurate at evaluating the myocardial microcirculation and has shown a powerful ability to detect myocardial ischemia. The purpose of this review is to summarize the principle, research progress of acquisition and analysis, and clinical implementation of cardiovascular magnetic resonance (CMR) myocardial perfusion imaging.
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Affiliation(s)
- Xue-Ming Li
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Li Jiang
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chen-Yan Min
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Wei-Feng Yan
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Meng-Ting Shen
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiao-Jing Liu
- Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ying-Kun Guo
- Department of Radiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zhi-Gang Yang
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
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Quinaglia T, Jerosch-Herold M, Coelho-Filho OR. State-of-the-Art Quantitative Assessment of Myocardial Ischemia by Stress Perfusion Cardiac Magnetic Resonance. Magn Reson Imaging Clin N Am 2020; 27:491-505. [PMID: 31279452 DOI: 10.1016/j.mric.2019.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ischemic heart disease remains the foremost determinant of death and disability across the world. Quantification of the ischemia burden is currently the preferred approach to predict event risk and to trigger adequate treatment. Cardiac magnetic resonance (CMR) can be a prime protagonist in this scenario due to its synergistic features. It allows assessment of wall motility, myocardial perfusion, and tissue scar by means of late gadolinium enhancement imaging. We discuss the clinical and preclinical aspects of gadolinium-based, perfusion CMR imaging, including the relevance of high spatial resolution and 3-dimensional whole-heart coverage, among important features of this auspicious method.
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Affiliation(s)
- Thiago Quinaglia
- Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Rua Tessália Viera de Camargo, 126 - Cidade Universitária "Zeferino Vaz", Campinas, São Paulo 13083-887, Brazil
| | - Michael Jerosch-Herold
- Noninvasive Cardiovascular Imaging Program, Department of Radiology, Brigham and Women's Hospital, 75 Francis Street, Room L1-RA050, Mailbox #22, Boston, MA 02115, USA
| | - Otávio R Coelho-Filho
- Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Rua Tessália Viera de Camargo, 126 - Cidade Universitária "Zeferino Vaz", Campinas, São Paulo 13083-887, Brazil; Department of Internal Medicine, Hospital das Clínicas, State University of Campinas, UNICAMP, Rua Vital Brasil, 251- Cidade Universitária "Zeferino Vaz", Campinas, São Paulo 13083-888, Brazil.
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The association of cardiac function, structure, and glycemic control in patients with old myocardial infarction: a study using cardiac magnetic resonance. Diabetol Int 2016; 8:23-29. [PMID: 30603303 DOI: 10.1007/s13340-016-0271-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 04/19/2016] [Indexed: 12/14/2022]
Abstract
Purpose Cardiac magnetic resonance imaging (MRI) can provide noninvasive and accurate quantitative assessment of the left ventricular (LV) structure and function. We investigated the association between LV MRI measures and glycemic control in patients with old myocardial infarction (OMI). Materials and methods The study population consisted of 51 OMI patients. By using a 1.5-T MRI scanner, we acquired cine MRI and late gadolinium-enhanced MRI. We calculated the LV volume, LV mass (LVM), LV function and percentage of infarcted myocardial volume over the total LV myocardial volume (%LGE). Patients were allocated to three groups: normal glucose tolerance (NGT), n = 9; impaired glucose tolerance (IGT)/impaired fasting glucose (IFG), n = 15; diabetes mellitus (DM), n = 27; respectively. Results LVM was significantly increased in the DM group compared with the NGT group (p = 0.002). Multiple linear regression analysis demonstrated that HbA1c levels were significantly and independently associated with LVM after adjustment for risk factors of congestive heart failure and %LGE (p = 0.009). The LV ejection fraction (EF) was not associated with HbA1c levels. Conclusion Our findings suggest that glucose tolerance in patients with OMI may be associated with LV wall thickness. LVM calculation by cine MRI might be useful for longitudinal follow-up of the effect of diabetic treatment on OMI patients.
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Selvanayagam JB, Rajendran S. Functional Assessment of Chronic Total Occlusions: Can CMR Imaging Add Value? JACC Cardiovasc Imaging 2016; 9:557-8. [PMID: 27085429 DOI: 10.1016/j.jcmg.2015.11.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 11/05/2015] [Indexed: 11/18/2022]
Affiliation(s)
- Joseph B Selvanayagam
- Flinders University, Flinders Medical Centre, South Australian Health and Medical Research Institute, Adelaide, Australia.
| | - Sharmalar Rajendran
- University of Adelaide, Cardiology Unit, Queen Elizabeth Hospital/Lyell McEwin Hospital, Adelaide, Australia
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Nanni S, Lovato L, Vagnarelli F, Ghetti G, Ferlito M, Pasquale F, Russo V, Zompatori M, Bacchi Reggiani L, Semprini F, Taglieri N, Melandri G, Rapezzi C. Inferior Q waves in apparently healthy subjects: Should we take a deep breath? An electrocardiographic, echocardiographic and cardiac magnetic resonance study. J Electrocardiol 2016; 49:46-54. [DOI: 10.1016/j.jelectrocard.2015.08.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Indexed: 11/26/2022]
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Wang J, Xiang B, Lin HY, Liu H, Freed D, Arora RC, Tian G. Differential MR delayed enhancement patterns of chronic myocardial infarction between extracellular and intravascular contrast media. PLoS One 2015; 10:e0121326. [PMID: 25816056 PMCID: PMC4376775 DOI: 10.1371/journal.pone.0121326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 01/30/2015] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Because the distribution volume and mechanism of extracellular and intravascular MR contrast media differ considerably, the enhancement pattern of chronic myocardial infarction with extracellular or intravascular media might also be different. This study aims to investigate the differences in MR enhancement patterns of chronic myocardial infarction between extracellular and intravascular contrast media. MATERIALS AND METHODS Twenty pigs with myocardial infarction underwent cine MRI, first pass perfusion MRI and delayed enhancement MRI with extracellular or intravascular media at four weeks after coronary occlusion. Myocardial blood flow (MBF) was determined with microsphere measurement. The infarction histopathological changes were evaluated by hematoxylin and eosin staining and Masson's trichrome method. RESULTS Cine MRI revealed the reduced wall thickening in chronic infarction compared with normal myocardium. Moreover, significant wall thinning in chronic infarction was observed in cine MRI. Peak first-pass signal intensity didn't significantly differ between chronic infarction and normal myocardium no matter what kinds of contrast media. At the following delayed enhancement phase, extracellular media-enhanced signal intensity was significantly higher in chronic infarction than in normal myocardium. Conversely, intravascular media-enhanced signal intensity was almost equivalent among chronic infarction and normal myocardium. At four weeks after infarction, MBF in chronic infarction approached to that in normal myocardium. Large thick-walled vessels were detected at peri-infarction zones. The cardiomyocytes were replaced by scar tissue consisting of dilated blood vessels and discrete fibers of collagen. CONCLUSIONS Chronic infarction was characterized by the significantly reduced wall thickening and the definite wall thinning. First-pass myocardial perfusion defect was not detected in chronic infarction with two media due to the significantly recovered MBF and well-developed collateral vessels. Infarction remodeling enlarged the extracellular compartment, which was available for extracellular media but not accessible to intravascular media. Extracellular media identified chronic infarction as the hyper-enhancement; nonetheless, intravascular media didn't provide delayed enhancement.
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Affiliation(s)
- Jian Wang
- Department of Vascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Street, Wuhan, Hubei, China 430022
- National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6
- Department of Physiology, Faculty of Medicine, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba, Canada R3E 3P5
- * E-mail:
| | - Bo Xiang
- National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6
- Department of Physiology, Faculty of Medicine, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba, Canada R3E 3P5
| | - Hung Yu Lin
- National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6
| | - Hongyu Liu
- Department of Cardiac Surgery, The First Affiliated Hospital, Harbin Medical University, 23 Youzheng Street, Harbin, Heilongjiang, China 150081
| | - Darren Freed
- National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6
- Department of Physiology, Faculty of Medicine, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba, Canada R3E 3P5
- Cardiac Science Program, Institute of Cardiovascular Science, St. Boniface General Hospital, 409 Tache Avenue, Winnipeg, Manitoba, Canada R2H 2A6
| | - Rakesh C. Arora
- National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6
- Department of Physiology, Faculty of Medicine, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba, Canada R3E 3P5
- Cardiac Science Program, Institute of Cardiovascular Science, St. Boniface General Hospital, 409 Tache Avenue, Winnipeg, Manitoba, Canada R2H 2A6
| | - Ganghong Tian
- National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6
- Department of Physiology, Faculty of Medicine, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba, Canada R3E 3P5
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Fine NM, Arruda-Olson AM, Dispenzieri A, Zeldenrust SR, Gertz MA, Kyle RA, Swiecicki PL, Scott CG, Grogan M. Yield of noncardiac biopsy for the diagnosis of transthyretin cardiac amyloidosis. Am J Cardiol 2014; 113:1723-7. [PMID: 24698461 DOI: 10.1016/j.amjcard.2014.02.030] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Revised: 02/18/2014] [Accepted: 02/18/2014] [Indexed: 11/28/2022]
Abstract
Transthyretin (ATTR) cardiac amyloidosis may be because of mutant transthyretin causing familial amyloid cardiomyopathy (FAC) or wild-type transthyretin causing systemic senile amyloidosis (SSA). Histologic confirmation is often challenging and may require endomyocardial biopsy (EMB). The purpose of this study was to determine the frequency of amyloid protein deposition in positive noncardiac organ biopsy or fat aspiration in patients with ATTR cardiac amyloidosis. The medical records of 286 patients (mean age 66 ± 11, 85% men) with a diagnosis of ATTR cardiac amyloidosis at our institution who underwent noncardiac biopsy or subcutaneous fat aspiration were reviewed, including 186 patients (65%) with FAC and 100 patients (35%) with SSA. One hundred and thirty-one patients (46%) had EMB, all of which were positive. There were 210 patients (73%) with positive noncardiac tissue sampling, including 175 patients (94%) with FAC and 35 patients (35%) with SSA (p <0.001). There were 141 patients (76%) with FAC and 84 patients (84%) with SSA who underwent fat aspiration, and 67% and 14% were positive, respectively, whereas 100 (54%) and 64 (64%) underwent bone marrow biopsy, and 41% and 30% were positive, respectively. Rectal and sural nerve biopsies were performed in 52 (28%) and 54 (29%) patients with FAC and were positive in 81% and 83%, respectively. Biopsy of other noncardiac sites was performed with relatively lower frequency. In conclusion, although EMB is more commonly required to establish the diagnosis of SSA than FAC, noncardiac biopsy or fat aspiration could be considered as initial testing in patients evaluated for ATTR cardiac amyloidosis with characteristic echocardiography findings.
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Affiliation(s)
- Nowell M Fine
- Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Adelaide M Arruda-Olson
- Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Angela Dispenzieri
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Steven R Zeldenrust
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Morie A Gertz
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Robert A Kyle
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | | | - Christopher G Scott
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Martha Grogan
- Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, Minnesota.
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Pathological mechanism for delayed hyperenhancement of chronic scarred myocardium in contrast agent enhanced magnetic resonance imaging. PLoS One 2014; 9:e96463. [PMID: 24802515 PMCID: PMC4011786 DOI: 10.1371/journal.pone.0096463] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 04/08/2014] [Indexed: 11/22/2022] Open
Abstract
Objectives To evaluate possible mechanism for delayed hyperenhancement of scarred myocardium by investigating the relationship of contrast agent (CA) first pass and delayed enhancement patterns with histopathological changes. Materials and Methods Eighteen pigs underwent 4 weeks ligation of 1 or 2 diagonal coronary arteries to induce chronic infarction. The hearts were then removed and perfused in a Langendorff apparatus. The hearts firstly experienced phosphorus 31 MR spectroscopy. The hearts in group I (n = 9) and II (n = 9) then received the bolus injection of Gadolinium diethylenetriamine pentaacetic acid (0.05 mmol/kg) and gadolinium-based macromolecular agent (P792, 15 µmol/kg), respectively. First pass T2* MRI was acquired using a gradient echo sequence. Delayed enhanced T1 MRI was acquired with an inversion recovery sequence. Masson's trichrome and anti- von Willebrand Factor (vWF) staining were performed for infarct characterization. Results Wash-in of both kinds of CA caused the sharp and dramatic T2* signal decrease of scarred myocardium similar to that of normal myocardium. Myocardial blood flow and microvessel density were significantly recovered in 4-week-old scar tissue. Steady state distribution volume (ΔR1 relaxation rate) of Gd-DTPA was markedly higher in scarred myocardium than in normal myocardium, whereas ΔR1 relaxation rate of P792 did not differ significantly between scarred and normal myocardium. The ratio of extracellular volume to the total water volume was significantly greater in scarred myocardium than in normal myocardium. Scarred myocardium contained massive residual capillaries and dilated vessels. Histological stains indicated the extensively discrete matrix deposition and lack of cellular structure in scarred myocardium. Conclusions Collateral circulation formation and residual vessel effectively delivered CA into scarred myocardium. However, residual vessel without abnormal hyperpermeability allowed Gd-DTPA rather than P792 to penetrate into extravascular compartment. Discrete collagen fiber meshwork and loss of cellularity enlarged extracellular space accessible to Gd-DTPA, resulting in the delayed hyper-enhanced scar.
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Machann W, Geier O, Koeppe S, O’Donnell T, Greiser A, Breunig F, Sandstede J, Hahn D, Koestler H, Beer M. Reproducibility of manual and semi-automated late enhancement quantification in patients with Fabry disease. Acta Radiol 2014; 55:155-60. [PMID: 24078459 DOI: 10.1177/0284185113505275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Late enhancement (LE) imaging is increasingly used for diagnosis of non-ischemic cardiomyopathy. However, the mostly patchy appearance of LE in this context may reduce the reproducibility of LE measurement. PURPOSE To report intra- and inter-observer variabilities of LE measurements in Fabry disease using manual and semi-automated quantification. MATERIAL AND METHODS Twenty MRI data-sets of male patients aged 44 ± 7 years were analyzed twice (interval 12 months) by one observer and additionally once by a second observer. Left ventricular (LV) parameters were determined using cine MRI. Gradient-echo LE images were analyzed by manual planimetry and by a semi-automatic prototype software. Variabilities were determined by Bland-Altman analyses and additionally intra-class correlation coefficient (ICC) values were calculated to survey intra- and inter-observer reproducibility. RESULTS The amount of LE was 5.2 ± 5.1 mL or 2.8 ± 2.6 % of LV mass (observer 2). LE was detected predominantly intramurally in a patchy pattern. All patients had LE restricted to the basal infero-lateral parts of the LV. The extent of LE correlated to LV mass (207 ± 70 g, P < 0.05, r = 0.6). The intra- and inter-observer variabilities were -0.6 to 1.0 mL and -0.7 to 1.6 mL, respectively (95% confidence intervals). ICC values were 0.981-0.999. The semi-automatic software allowed quantification of LE areas in all patients. The comparison of LE amount determined by semi-automatic software versus manual planimetry yielded an intra-observer variability ranging from -1.9 to 2.3 mL. CONCLUSION Semi-automatic planimetry of patchy LE in patients with Fabry disease is feasible. The determined intra- and inter-observer variabilities for manual and semi-automatic planimetry were in the range of 20-40% of LE amount with high ICC values.
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Affiliation(s)
- Wolfram Machann
- Institute of Radiology, University of Würzburg, Würzburg, Germany
| | - Oliver Geier
- The Intervention Centre, Oslo University Hospital, Norway
| | - Sabrina Koeppe
- Institute of Radiology, University of Würzburg, Würzburg, Germany
| | | | | | - Frank Breunig
- Department of Internal Medicine, University of Würzburg, Würzburg, Germany
| | - Joern Sandstede
- Institute of Radiology, University of Würzburg, Würzburg, Germany
| | - Dietbert Hahn
- Institute of Radiology, University of Würzburg, Würzburg, Germany
| | - Herbert Koestler
- Institute of Radiology, University of Würzburg, Würzburg, Germany
- Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany
| | - Meinrad Beer
- Institute of Radiology, University of Würzburg, Würzburg, Germany
- Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany
- Department of Radiology, Medical University Graz, Graz, Austria
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Fine NM, Tandon S, Kim HW, Shah DJ, Thompson T, Drangova M, White JA. Validation of sub-segmental visual scoring for the quantification of ischemic and nonischemic myocardial fibrosis using late gadolinium enhancement MRI. J Magn Reson Imaging 2013; 38:1369-76. [DOI: 10.1002/jmri.24116] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 02/13/2013] [Indexed: 11/08/2022] Open
Affiliation(s)
- Nowell M. Fine
- Division of Cardiology; Department of Medicine; Schulich School of Medicine and Dentistry; University of Western Ontario; London Ontario Canada
| | - Shruti Tandon
- Division of Cardiology; Department of Medicine; Schulich School of Medicine and Dentistry; University of Western Ontario; London Ontario Canada
| | - Han W. Kim
- Duke Cardiovascular Magnetic Resonance Center; Division of Cardiology; Duke University; Durham North Carolina USA
| | - Dipan J. Shah
- The Methodist DeBakey Heart Center; Houston Texas USA
| | - Terry Thompson
- Lawson Health Research Institute; London Ontario Canada
- Department of Medical Biophysics; University of Western Ontario; London Ontario Canada
| | - Maria Drangova
- Department of Medical Biophysics; University of Western Ontario; London Ontario Canada
- Imaging Research Laboratories; Robarts Research Institute; London Ontario Canada
| | - James A. White
- Division of Cardiology; Department of Medicine; Schulich School of Medicine and Dentistry; University of Western Ontario; London Ontario Canada
- Department of Medical Biophysics; University of Western Ontario; London Ontario Canada
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Romero J, Xue X, Gonzalez W, Garcia MJ. CMR imaging assessing viability in patients with chronic ventricular dysfunction due to coronary artery disease: a meta-analysis of prospective trials. JACC Cardiovasc Imaging 2012; 5:494-508. [PMID: 22595157 DOI: 10.1016/j.jcmg.2012.02.009] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 02/23/2012] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The purpose of this study was to compare the diagnostic accuracy of cardiac magnetic resonance (CMR) assessing myocardial viability in patients with chronic left ventricular (LV) dysfunction due to coronary artery disease using 3 techniques: 1) end-diastolic wall thickness (EDWT); 2) low-dose dobutamine (LDD); and 3) contrast delayed enhancement (DE). BACKGROUND CMR has been proposed to assess myocardial viability over the past decade. However, the best CMR strategy to evaluate patients being contemplated for revascularization has not yet been determined. Some centers advocate DE CMR due to its high sensitivity to identify scar, whereas others favor the use of LDD CMR for its ability to identify contractile reserve. METHODS A systematic review of MEDLINE, Cochrane, and Embase for all the prospective trials assessing myocardial viability in subjects with chronic LV dysfunction using CMR was performed using a standard approach for meta-analysis for diagnostic tests and a bivariate analysis of sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). RESULTS A total of 24 studies of CMR evaluating myocardial viability with 698 patients fulfilled the inclusion criteria. Eleven studies used DE, 9 studies used LDD, and 4 studies used EDWT. Our meta-analysis indicates that among CMR methods, DE CMR provides the highest sensitivity as well as the highest NPV (95% and 90%, respectively) for predicting improved segmental LV contractile function after revascularization, followed by EDWT CMR, whereas LDD CMR demonstrated the lowest sensitivity/NPV among all modalities. On the other hand, LDD CMR offered the highest specificity and PPV (91% and 93%, respectively), followed by DE CMR, whereas EDWT showed the lowest of these parameters. CONCLUSIONS DE CMR provides the highest sensitivity and NPV, whereas LDD CMR provides the best specificity and PPV. In light of these findings, integrating these 2 methods should provide increased accuracy in evaluating patients with chronic LV dysfunction being considered for revascularization.
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Affiliation(s)
- Jorge Romero
- Division of Cardiology and Montefiore-Einstein Center for Heart and Vascular Care, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467-2400, USA
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Khan AM, Litt H, Ferrari V, Han Y. Cardiac Magnetic Resonance Imaging in Ischemic Heart Disease. PET Clin 2011; 6:453-73. [DOI: 10.1016/j.cpet.2011.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Krittayaphong R, Chaithiraphan V, Maneesai A, Udompanturak S. Prognostic value of combined magnetic resonance myocardial perfusion imaging and late gadolinium enhancement. Int J Cardiovasc Imaging 2011; 27:705-14. [PMID: 21479846 DOI: 10.1007/s10554-011-9863-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 03/29/2011] [Indexed: 12/28/2022]
Abstract
Late gadolinium enhancement (LGE) and myocardial perfusion study by cardiac magnetic resonance (CMR) have a diagnostic and prognostic value in patients with suspected coronary artery disease (CAD). The purpose of this study was to determine the prognostic value of combined myocardial perfusion CMR and LGE in patients with known or suspected CAD. We studied patients with known or suspected CAD. All patients underwent CMR for functional study, myocardial perfusion and LGE. Myocardial ischemia by CMR was defined as a perfusion defect in patients without LGE or a perfusion defect beyond the LGE area. Patients were followed up for cardiovascular outcomes including hard cardiac events (cardiac death or non-fatal myocardial infarction) and major adverse cardiac events (MACE) which included cardiac death, non-fatal myocardial infarction, hospitalization for unstable angina, and heart failure. There were a total of 587 men and 645 women. Average age was 64.6 ± 11.1 years. LGE was detected in 326 patients (26.5%). Myocardial ischemia by CMR was detected in 423 patients (34.3%). Average follow-up duration was 34.9 ± 15.6 months. Univariate analysis showed that age, diabetes, use of beta blocker, left ventricular ejection fraction, left ventricular mass, wall motion abnormality, LGE, and myocardial ischemia are predictors for hard cardiac events and MACE. Multivariable analysis revealed that myocardial ischemia was the strongest predictor for hard cardiac events and MACE. Other independent predictors were age, use of beta blocker, and left ventricular mass. Myocardial ischemia by CMR has an incremental prognostic value for cardiac events in patients with known or suspected CAD.
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Affiliation(s)
- Rungroj Krittayaphong
- Division of Cardiology, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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15
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Koeppe S, Neubauer H, Breunig F, Weidemann F, Wanner C, Sandstede J, Machann W, Hahn D, Köstler H, Beer M. MR-based analysis of regional cardiac function in relation to cellular integrity in Fabry disease. Int J Cardiol 2011; 160:53-8. [PMID: 21463907 DOI: 10.1016/j.ijcard.2011.03.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 03/10/2011] [Accepted: 03/12/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND Fabry cardiomyopathy is characterized by left ventricular (LV) hypertrophy and regional fibrosis. Recent high-end echocardiography studies of selected LV sections suggest an interrelation between regional fibrosis, impaired function, and hypertrophy possibly changing under specific enzyme replacement therapy (ERT). METHODS Magnetic resonance imaging (MRI) was used for a region dependent study of cardiac function, morphology and late enhancement (LE) in 25 Fabry patients before and after 12 months of ERT in comparison to 43 healthy volunteers. RESULTS Fabry patients presented with LV increased wall thickness (EDWT) and reduced wall thickening (WT) with a focus on basal and midventricular regions corresponding to areas of LE. The degree of hypertrophy and hypokinesia were the highest if LE was detectable. A significant decrease of the EDWT under ERT was observed in LE negative patients accompanied by a decline of hypokinesia with regional differences. CONCLUSIONS Regional differences of LV hypertrophy and wall motion were detected corresponding to the distribution of myocardial fibrosis (LE). Functional impairment was closely restricted to fibrotic regions while morphologic changes slightly exceeded the areas of fibrosis. ERT resulted in regional improvements whereby absence of fibrosis was connected to a better outcome.
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Affiliation(s)
- Sabrina Koeppe
- Institute of Radiology, Wuerzburg University, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany
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16
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Kociemba A, Karmelita-Katulska K, Siniawski A, Łanocha M, Janus M, Stajgis M, Grajek S, Pyda M. Magnetic resonance imaging in the diagnostics of myocardial infarction. Pol J Radiol 2011; 76:53-7. [PMID: 22802842 PMCID: PMC3389928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 06/29/2011] [Indexed: 11/05/2022] Open
Abstract
Cardiovascular magnetic resonance (CMR) has a growing application in the diagnostics of myocardial infarction (MI). It is a non-invasive method that can be used regardless of the shape of patient's body. A single study allows assessment of the morphology and function of the cardiac muscle. It visualizes many pathophysiologic changes such as edema, microvascular obstruction (MVO) or necrosis, and complications of MI, like myocardial hemorrhage (MH) or thrombus, which are very difficult to diagnose using other methods. An obvious advantage of CMR is the possibility to differentiate an acute MI from the chronic one and to identify the etiology of fibrosis. All the aforementioned features of CMR have made it a useful tool in planning the treatment and assessing the prognosis of patients after MI.
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Affiliation(s)
- Anna Kociemba
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
| | - Katarzyna Karmelita-Katulska
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland,Author’s address: Katarzyna Karmelita-Katulska, Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland, e-mail:
| | - Andrzej Siniawski
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
| | - Magdalena Łanocha
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
| | - Magdalena Janus
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
| | - Marek Stajgis
- Department of General Radiology of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
| | - Stefan Grajek
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
| | - Małgorzata Pyda
- Magnetic Resonance Laboratory, 1st Cardiology Clinic of Karol Marcinkowski University of Medical Sciences in Poznań, Poznań, Poland
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17
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Kim HW, Farzaneh-Far A, Kim RJ. Cardiovascular magnetic resonance in patients with myocardial infarction: current and emerging applications. J Am Coll Cardiol 2010; 55:1-16. [PMID: 20117357 DOI: 10.1016/j.jacc.2009.06.059] [Citation(s) in RCA: 253] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 05/26/2009] [Accepted: 06/18/2009] [Indexed: 12/18/2022]
Abstract
In patients with known or suspected myocardial infarction (MI), cardiovascular magnetic resonance (CMR) provides a comprehensive, multifaceted view of the heart. The data, including that from a recent multicenter clinical trial, indicate that delayed-enhancement cardiac magnetic resonance imaging (DE-CMR) is a well-validated, robust technique that can be easily implemented on scanners that are commonly available worldwide, with an effectiveness that clearly rivals the best available imaging techniques for the detection and assessment of acute and chronic MI. When patients present outside the diagnostic window of cardiac troponins, DE-CMR may be especially useful. Moreover, because DE-CMR can uniquely differentiate between ischemic and various nonischemic forms of myocardial injury, it may be helpful in cases of diagnostic uncertainty, such as in patients with classical features of MI in whom coronary angiography does not show a culprit lesion. Even after the diagnosis of MI has been made, CMR provides clinically relevant information by identifying residual viability, microvascular damage, stunning, and right ventricular infarction. In addition, post-MI sequelae, including left ventricular thrombus and pericarditis, are easily identified. Given that quantification of infarct size by DE-CMR is highly reproducible, this technique may provide a useful surrogate end point for clinical trials with appreciable reductions in sample size compared with alternative methods.
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Affiliation(s)
- Han W Kim
- Duke Cardiovascular Magnetic Resonance Center, Duke University Medical Center, Durham, North Carolina 27710, USA
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18
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High Field Cardiac Magnetic Resonance Imaging – Current and Future Perspectives. Heart Lung Circ 2010; 19:145-53. [DOI: 10.1016/j.hlc.2009.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 11/26/2009] [Accepted: 11/29/2009] [Indexed: 01/18/2023]
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19
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Cheng ASH, Selvanayagam JB, Jerosch-Herold M, van Gaal WJ, Karamitsos TD, Neubauer S, Banning AP. Percutaneous treatment of chronic total coronary occlusions improves regional hyperemic myocardial blood flow and contractility: insights from quantitative cardiovascular magnetic resonance imaging. JACC Cardiovasc Interv 2009; 1:44-53. [PMID: 19393143 DOI: 10.1016/j.jcin.2007.11.003] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Revised: 11/14/2007] [Accepted: 11/21/2007] [Indexed: 11/30/2022]
Abstract
OBJECTIVES We sought to investigate temporal changes in contractility and hyperemic and resting myocardial blood flow (MBF) in dependent and remote myocardium after percutaneous coronary intervention (PCI) of chronic total occlusions (CTOs) by using cardiovascular magnetic resonance (CMR) imaging. BACKGROUND Data about the physiological consequences of revascularization of CTOs are limited. The use of CMR allows investigation of the regional effects of revascularization on MBF and left ventricular contractility. METHODS We prospectively recruited 3 patient groups: 17 patients scheduled for CTO PCI, 17 scheduled for PCI of a stenosed but nonoccluded coronary artery (non-CTO), and 6 patients with CTO who were not scheduled for revascularization. All patients undergoing PCI underwent CMR imaging <24 h before PCI, with repeat CMR imaging 24 h and 6 months after PCI. Each CMR scan consisted of cine, perfusion, and delayed enhancement imaging. Regional hyperemic and resting MBF, wall thickening, and transmural extent of infarction were calculated. RESULTS In both intervention groups, hyperemic MBF in treated segments increased 24 h after PCI compared with baseline: CTO group, 2.1 +/- 0.2 ml/min/g versus 1.4 +/- 0.2 ml/min/g (p < 0.01); non-CTO group, 2.5 +/- 0.2 ml/min/g versus 1.6 +/- 0.2 ml/min/g (p < 0.01). This improvement persisted 6 months after PCI (p < 0.01 for both groups). Contractility in treated segments was improved at 24 h and 6 months after CTO PCI but only at 6 months after non-CTO PCI. In both intervention groups, treated segments no longer had reduced MBF or contractility compared with remote segments. In patients with untreated CTO segments, MBF and wall thickening did not improve at follow-up. CONCLUSIONS Successful CTO PCI increases hyperemic MBF as early as 24 h after the procedure, with a greater and earlier improvement in regional contractility than after non-CTO PCI, despite a greater likelihood of irreversible injury in CTO segments.
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Affiliation(s)
- Adrian S H Cheng
- University of Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford, United Kingdom
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20
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Krittayaphong R, Maneesai A, Chaithiraphan V, Saiviroonporn P, Chaiphet O, Udompunturak S. Comparison of diagnostic and prognostic value of different electrocardiographic criteria to delayed-enhancement magnetic resonance imaging for healed myocardial infarction. Am J Cardiol 2009; 103:464-70. [PMID: 19195503 DOI: 10.1016/j.amjcard.2008.10.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2008] [Revised: 10/02/2008] [Accepted: 10/02/2008] [Indexed: 10/21/2022]
Abstract
The accuracy of various electrocardiographic (ECG) criteria for the diagnosis of healed myocardial infarction (MI) has never been validated. The objective of this study was to determine the accuracy and prognostic value of standard ECG criteria for the diagnosis of healed MI compared with cardiac magnetic resonance (CMR). Consecutive patients with known or suspected coronary artery disease who were referred for CMR were studied. Twelve-lead electrocardiography and CMR were performed the same day. A standard CMR protocol including a delayed-enhancement (DE) technique was performed. The prognostic value of using various ECG criteria and DE-CMR was assessed for the occurrence of cardiac death, nonfatal MI, or major adverse cardiac events. We studied 1,366 patients. Average follow-up was 31.4 +/- 15.8 months. Myocardial scar was detected in 507 patients (37.1%) using DE-CMR. Healed MI using various ECG criteria had sensitivity, specificity, and accuracy of 44% to 59%, 91% to 95%, and 75% to 79% compared with DE-CMR, respectively. Multivariable Cox regression analysis showed that myocardial scar using DE-CMR was the most powerful predictor for cardiac events, followed by left ventricular ejection fraction. In the absence of DE-CMR data, MI using European Society of Cardiology/American College of Cardiology (ESC/ACC) 2000 criteria was the most powerful predictor. In conclusion, various ECG criteria had limited sensitivity, but high specificity, for the diagnosis of healed MI compared with myocardial scar using DE-CMR. Myocardial scar, left ventricular ejection fraction, and MI using ESC/ACC 2000 criteria were important predictors for cardiac events.
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21
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Rubenstein JC, Ortiz JT, Wu E, Kadish A, Passman R, Bonow RO, Goldberger JJ. The use of periinfarct contrast-enhanced cardiac magnetic resonance imaging for the prediction of late postmyocardial infarction ventricular dysfunction. Am Heart J 2008; 156:498-505. [PMID: 18760132 DOI: 10.1016/j.ahj.2008.04.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2008] [Accepted: 04/14/2008] [Indexed: 02/05/2023]
Abstract
BACKGROUND Although ejection fraction (EF) both perimyocardial infarction (MI) and late post-MI are important prognostic factors, only implantable cardioverter-defibrillator trials of post-MI patients with depressed late EF have shown improved survival. This may relate to imprecision of early EF because of post-MI stunning. We sought to determine if peri-MI infarct size, as measured by cardiac magnetic resonance (CMR), is superior to early EF to predict late post-MI EF. METHODS Seventy-three patients with ST-elevation MI had infarct size and EF quantified using CMR early (<1 week) and late (>3 months) post-MI. RESULTS Late EF was significantly correlated with early EF (R = 0.734, P < .001), and with infarct size (R = -0.661, P < .001), and both early EF and infarct size were significant predictors of late EF. Subgroup analyses showed that low late EF (<or=35%) was better predicted by infarct size than early EF. Half of the patients with early EF <or=35% had a late EF >35%. There was no difference in early EF between the subgroup with a late EF >35% compared to the subgroup with late EF </=35% (29.7% +/- 4.6% vs 28.0% +/- 4.9%, P = .414). There was, however, a significant difference between these 2 groups in infarct size (22.6% +/- 10.8% vs 34.7% +/- 7.8%, P = .011). CONCLUSIONS Infarct size as determined by CMR immediately post-MI is a significant predictor of late EF and is superior to early EF in patients with initially depressed EF. Further studies are warranted to assess whether infarct size estimation by CMR after acute MI can better identify patients who are at risk for sudden cardiac death than early EF.
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22
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Pack NA, Dibella EVR, Wilson BD, McGann CJ. Quantitative myocardial distribution volume from dynamic contrast-enhanced MRI. Magn Reson Imaging 2008; 26:532-42. [PMID: 18068931 DOI: 10.1016/j.mri.2007.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Revised: 08/29/2007] [Accepted: 10/08/2007] [Indexed: 10/22/2022]
Abstract
The objective of this study was to investigate if dynamic contrast-enhanced magnetic resonance imaging (MRI) can be used to quantitate the distribution volume (v(e)) in regions of normal and infarcted myocardium. v(e) reflects the volume of the extracellular, extravascular space within the myocardial tissue. In regions of the heart where an infarct has occurred, the loss of viable cardiac cells results in an elevated v(e) compared to normal regions. A quantitative estimate of the magnitude and spatial distribution of v(e) is significant because it may provide information complementary to delayed enhancement MRI alone. Using a hybrid gradient echo-echoplanar imaging pulse sequence on a 1.5T MRI scanner, 12 normal subjects and four infarct patients were imaged dynamically, during the injection of a contrast agent, to measure the regional blood and tissue enhancement in the left ventricular (LV) myocardium. Seven of the normal subjects and all of the infarct patients were also imaged at steady-state contrast enhancement to estimate the steady-state ratio of contrast agent in the tissue and blood (Ct/Cb) - a validated measure of v(e). Normal and infarct regions of the LV were manually selected, and the blood and tissue enhancement curves were fit to a compartment model to estimate v(e). Also, the effect of the vascular blood signal on estimates of v(e) was evaluated using simulations and in the dynamic and steady-state studies. Aggregate estimates of v(e) were 23.6+/-6.3% in normal myocardium and 45.7+/-3.4% in regions of infarct. These results were not significantly different from the reference standards of Ct/Cb (22.9+/-6.8% and 42.6+/-6.3%, P=.073). From the dynamic contrast-enhanced studies, approximately 1 min of scan time was necessary to estimate v(e) in the normal myocardium to within 10% of the steady-state estimate. In regions of infarct, up to 3 min of dynamic data were required to estimate v(e) to within 10% of the steady-state v(e) value. By measuring the kinetics of blood and tissue enhancement in the myocardium during an extended dynamic contrast enhanced MRI study, v(e) may be estimated using compartment modeling.
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Affiliation(s)
- Nathan A Pack
- Department of Bioengineering, University of Utah, SLC, UT, USA
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23
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Wang J, Liu HY, Lv H, Xiang B, Gruwel M, Tomanek B, Deslauriers R, Tian GH. Identification of chronic myocardial infarction with extracellular or intravascular contrast agents in magnetic resonance imaging. Acta Pharmacol Sin 2008; 29:65-73. [PMID: 18158867 DOI: 10.1111/j.1745-7254.2008.00656.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
AIM To determine whether extracellular or intravascular contrast agents could detect chronic scarred myocardium in magnetic resonance imaging (MRI). METHODS Eighteen pigs underwent a 4 week ligation of 1 or 2 diagonal coronary arteries to induce chronic myocardial infarction. The hearts were then removed and perfused in a Langendorff apparatus. Eighteen hearts were divided into 2 groups. The hearts in groups I (n=9) and II (n=9) received the bolus injection of Gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA, 0.05 mmol/kg) and gadolinium- based macromolecular agent (P792, 15 micromol/kg), respectively. First pass T2* MRI was acquired using a FLASH sequence. Delayed enhancement T1 MRI was acquired with an inversion recovery prepared TurboFLASH sequence. RESULTS Wash-in of both agents resulted in a sharp and dramatic T2* signal loss of scarred myocardium similar to that of normal myocardium. The magnitude and velocity of T2* signal recovery caused by wash-out of extracellular agents in normal myocardium was significantly less than that in scarred myocardium. Conversely, the T2* signal of scarred and normal myocardium recovered to plateau rapidly and simultaneously due to wash-out of intravascular agents. At the following equilibrium, extracellular agent-enhanced T1 signal intensity was significantly greater in scarred myocardium than in normal myocardium, whereas there was no significantly statistical difference in intravascular agent-enhanced T1 signal intensity between scarred and normal myocardium. CONCLUSION After administration of extracellular agents, wash-out T2* first-pass and delayed enhanced T1 MRI could identify scarred myocardium as a hyperenhanced region. Conversely, scarred myocardium was indistinguishable from normal myocardium during first-pass and the steady state of intravascular agents.
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Affiliation(s)
- Jian Wang
- Institute for Biodiagnostics, National Research Council, Winnipeg, Manitoba, Canada
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24
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Contrast-enhanced magnetic resonance imaging in the assessment of myocardial infarction and viability. J Nucl Cardiol 2007; 15:105-17. [PMID: 18242487 DOI: 10.1007/bf02976902] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Contrast-enhanced magnetic resonance imaging (MRI) can be used to visualize the transmural extent of myocardial infarction with high spatial resolution. The aim of this review is to provide an overview of the use of contrast-enhanced MRI for characterization of ischemic myocardial injury in comparison to other imaging methods and its relevance in clinical syndromes related to coronary artery disease. Infarcted myocardium appears hyperenhanced compared with normal myocardium when imaged by a delayed-enhancement MRI technique with the use of an inversion-prepared T(1)-weighted sequence after injection of gadolinium chelates, such as gadolinium-diethylenetriamine pentaacetic acid. Experimental and clinical studies indicate that the extent of delayed enhancement is reproducible and closely correlates with the size of myocardial necrosis or infarct scar as determined by established in vitro and in vivo methods. Furthermore, MRI appears to be more sensitive than other imaging methods in detecting small subendocardial infarctions. The transmural extent of delayed enhancement potentially predicts functional outcome after revascularization in acute myocardial infarction and chronic ischemic heart disease, indicating that it can accurately discriminate between infarction and dysfunctional but viable myocardium. Further experience from clinical trials is needed to understand the association of delayed enhancement with clinical outcomes.
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25
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Beer M, Weidemann F, Breunig F, Knoll A, Koeppe S, Machann W, Hahn D, Wanner C, Strotmann J, Sandstede J. Impact of enzyme replacement therapy on cardiac morphology and function and late enhancement in Fabry's cardiomyopathy. Am J Cardiol 2006; 97:1515-8. [PMID: 16679096 DOI: 10.1016/j.amjcard.2005.11.087] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2005] [Revised: 11/28/2005] [Accepted: 11/28/2005] [Indexed: 11/16/2022]
Abstract
The present study evaluated the evolution of cardiac morphology, function, and late enhancement as a noninvasive marker of myocardial fibrosis, and their inter-relation during enzyme replacement therapy in patients with Fabry's disease using magnetic resonance imaging and color Doppler myocardial imaging. Late enhancement, which was present in up to 50% of patients, was associated with increased left ventricular mass, the failure of a significant regression of hypertrophy during enzyme replacement therapy, and worse segmental myocardial function. Late enhancement may predict the effect of enzyme replacement therapy on left ventricular mass and cardiac function.
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Affiliation(s)
- Meinrad Beer
- Institut für Röntgendiagnostik, Würzburg, Germany.
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