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Boccalini S, Teulade M, Douek P, Moulin P. Reply to Letter to the Editor: "Silent myocardial infarction fatty scars detected by coronary calcium score CT scan in diabetic patients without a history of coronary heart disease". Eur Radiol 2024:10.1007/s00330-024-10913-2. [PMID: 38995380 DOI: 10.1007/s00330-024-10913-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 04/16/2024] [Accepted: 04/26/2024] [Indexed: 07/13/2024]
Affiliation(s)
- Sara Boccalini
- Department of Cardiovascular Radiology, Hôpital Pradel, Hospices Civils de Lyon, Lyon, France.
- University Claude Bernard Lyon 1, Lyon, France.
| | - Marie Teulade
- Department of Endocrinology, Louis Pradel University Hospital, Hospices Civils de Lyon, INSERM UMR 1060 Carmen, Lyon, France
| | - Philippe Douek
- Department of Cardiovascular Radiology, Hôpital Pradel, Hospices Civils de Lyon, Lyon, France
- University Claude Bernard Lyon 1, Lyon, France
| | - Philippe Moulin
- University Claude Bernard Lyon 1, Lyon, France
- Department of Endocrinology, Louis Pradel University Hospital, Hospices Civils de Lyon, INSERM UMR 1060 Carmen, Lyon, France
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Boccalini S, Teulade M, Paquet E, Si-Mohamed S, Rapallo F, Moreau-Triby C, Charrière S, Mewton N, Boussel L, Bergerot C, Douek P, Moulin P. Silent myocardial infarction fatty scars detected by coronary calcium score CT scan in diabetic patients without history of coronary heart disease. Eur Radiol 2024; 34:214-225. [PMID: 37530810 PMCID: PMC10791785 DOI: 10.1007/s00330-023-09940-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 08/03/2023]
Abstract
OBJECTIVES To evaluate the prevalence of intra-myocardial fatty scars (IMFS) most likely indicating previous silent myocardial infarction (SMI), as detected on coronary artery calcium (CAC) computed tomography (CT) scans in diabetic patients without history of coronary heart disease (CHD). METHODS Diabetic patients screened for silent coronary insufficiency in a tertiary-care, university hospital between Jan-2015 and Dec-2016 were categorized according to their CAC score in two groups comprising 242 patients with CACS = 0 and 145 patients with CACS ≥ 300. CAC-CT scans were retrospectively evaluated for subendorcardial and transmural IMFS of the left ventricle. Adipose remodeling, patients' characteristics, cardiovascular risk factors and metabolic profile were compared between groups. RESULTS Eighty-three (21%) patients with IMFS were identified, 55 (37.9%) in the group CACS ≥ 300 and 28 (11.6%) in the CACS = 0 (OR = 4.67; 95% CI = 2.78-7.84; p < 0.001). Total and average surface of IMFS and their number per patient were similar in both groups (p = 0.55; p = 0.29; p = 0.61, respectively). In the group CACS ≥ 300, patients with IMFS were older (p = 0.03) and had longer-lasting diabetes (p = 0.04). Patients with IMFS were older and had longer history of diabetes, reduced glomerular filtration rate, more coronary calcifications (all p < 0.05), and higher prevalence of carotid plaques (OR = 3.03; 95% CI = 1.43-6.39, p = 0.004). After correction for other variables, only a CACS ≥ 300 (OR = 5.12; 95% CI = 2.66-9.85; p < 0.001) was associated with an increased risk of having IMFS. CONCLUSIONS In diabetic patients without known CHD, IMFSs were found in patients without coronary calcifications, although not as frequently as in patients with heavily calcified coronary arteries. It remains to be established if this marker translates in an upwards cardiovascular risk restratification especially in diabetic patients with CACS = 0. CLINICAL RELEVANCE STATEMENT In diabetic patients without history of coronary heart disease, intramyocardial fatty scars, presumably of post-infarction origin, can be detected on coronary artery calcium CT scans more frequently, but not exclusively, if the coronary arteries are heavily calcified as compared to those without calcifications. KEY POINTS • Intramyocardial fatty scars (IMFS), presumably of post-infarction origin, can be detected on coronary artery calcium (CAC) CT scans more frequently, but not exclusively, in diabetic patients with CACS ≥ 300 as compared to patients CACS = 0. • Patients with IMFS were older and had longer history of diabetes, reduced glomerular filtration rate, and more coronary calcifications. • Carotid plaques and CACS ≥ 300 were associated with an increased risk of having IMFS, about three and five folds respectively.
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Affiliation(s)
- Sara Boccalini
- Department of Cardiovascular Radiology, Hôpital Pradel, Hospices Civils de Lyon, Lyon, France.
- University Claude Bernard Lyon 1, Lyon, France.
| | - Marie Teulade
- University Claude Bernard Lyon 1, Lyon, France
- Department of Endocrinology Louis Pradel University Hospital, Hospices Civils de Lyon, INSERM UMR 1060, Carmen, Lyon, France
| | - Emilie Paquet
- Department of Nuclear Medicine, Hôpital Louis Pradel, Hospices Civils de Lyon, Lyon, France
| | - Salim Si-Mohamed
- Department of Cardiovascular Radiology, Hôpital Pradel, Hospices Civils de Lyon, Lyon, France
- University Claude Bernard Lyon 1, Lyon, France
| | - Fabio Rapallo
- Department of Economics, University of Genova, Genoa, Italy
| | - Caroline Moreau-Triby
- Department of Nuclear Medicine, Hôpital Louis Pradel, Hospices Civils de Lyon, Lyon, France
| | - Sybil Charrière
- University Claude Bernard Lyon 1, Lyon, France
- Department of Endocrinology Louis Pradel University Hospital, Hospices Civils de Lyon, INSERM UMR 1060, Carmen, Lyon, France
| | - Nathan Mewton
- University Claude Bernard Lyon 1, Lyon, France
- Department of Cardiology, Hôpital Louis Pradel, Hospices Civils de Lyon, Lyon, France
| | - Loic Boussel
- Department of Radiology, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Cyrille Bergerot
- Department of Cardiology, Hôpital Louis Pradel, Hospices Civils de Lyon, Lyon, France
| | - Philippe Douek
- Department of Cardiovascular Radiology, Hôpital Pradel, Hospices Civils de Lyon, Lyon, France
- University Claude Bernard Lyon 1, Lyon, France
| | - Philippe Moulin
- University Claude Bernard Lyon 1, Lyon, France
- Department of Endocrinology Louis Pradel University Hospital, Hospices Civils de Lyon, INSERM UMR 1060, Carmen, Lyon, France
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Rodriguez-Granillo GA, Cirio JJ, Ciardi C, Caballero ML, Diluca P, Castrillon R, Ceron M, Scrivano E, Lylyk P. Cardiovascular thrombotic complications in acute ischemic stroke assessed by chest spectral computed tomography during COVID-19. Minerva Cardiol Angiol 2021; 69:606-618. [PMID: 33703860 DOI: 10.23736/s2724-5683.21.05547-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
During the pandemic context, diagnostic algorithms had to be adapted considering the decimated medical personnel, local technical resources, and the likelihood of contamination. Given the higher probability of thrombotic complications related to COVID-19 and the availability of a dual-layer spectral computed tomography (CT) scanner, we have recently adopted the use of low-dose, non-gated, chest CT scans performed five minutes after contrast administration among patients admitted with acute ischemic stroke (AIS) undergoing cerebrovascular CT angiography. Dual-layer spectral CT comprises a single X-ray source and two-layer detector with different photon-absorption capabilities. In addition to conventional images, the two distinct energy datasets obtained enable multiparametric spectral analysis without need to change the original scanning protocol. The two spectral features that emerge as most useful for patients with AIS are virtual monoenergetic imaging and iodine-based results. Aside from the evaluation of lung parenchyma, this novel strategy enables ruling out cardioembolic sources and simultaneously providing evidence of pulmonary and myocardial injury in a single session and immediately after CT cerebrovascular angiography. Furthermore, it involves a non-invasive, seemingly accurate, unsophisticated, safer (very low radiation dose and no contrast administration), and cheaper tool for ruling out cardioembolic sources compared to transesophageal echocardiogram and cardiac CT. Accordingly, we sought to standardize the technical aspects and overview the usefulness of delayed-phase, low-dose chest spectral CT in patients admitted with AIS.
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Affiliation(s)
- Gaston A Rodriguez-Granillo
- Department of Cardiovascular Imaging, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina - .,National Council of Scientific and Technical Investigations - Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Buenos Aires, Argentina -
| | - Juan J Cirio
- Stroke Unit, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Celina Ciardi
- Stroke Unit, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Maria L Caballero
- Stroke Unit, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Pablo Diluca
- Department of Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Ricardo Castrillon
- Department of Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Marcos Ceron
- Department of Cardiovascular Imaging, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Esteban Scrivano
- Department of Interventional Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
| | - Pedro Lylyk
- Department of Interventional Radiology, ENERI Medical Institute, La Sagrada Familia Clinic, Buenos Aires, Argentina
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Improved Discrimination of Myocardial Perfusion Defects at Low Energy Levels Using Virtual Monochromatic Imaging. J Comput Assist Tomogr 2017; 41:661-667. [PMID: 28296684 DOI: 10.1097/rct.0000000000000584] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES The aim of this study was to explore the diagnostic performance of dual-energy computed tomography perfusion (DE-CTP) at different energy levels. METHODS Patients with known or suspected coronary artery disease underwent stress and rest DE-CTP and single-photon emission computed tomography. Images were evaluated using monochromatic data, and perfusion defects were initially identified in a qualitative manner and subsequently confirmed using attenuation levels. RESULTS Thirty-six patients were included. Sensitivity, specificity, positive predictive value, and negative predictive value of DE-CTP for the identification of perfusion defects were 84.1%, 94.2%, 77.3%, and 96.2%, respectively. Perfusion defects showed significantly lower attenuation than normal segments, with the largest differences among low energy levels (sensitivity of 96% and specificity of 98% using a cutoff value ≤ 153 Hounsfield units at 40 keV), progressively declining at the higher levels (P < 0.001). CONCLUSIONS Dual-energy CTP at the lowest energy levels allowed improved discrimination of perfusion defects compared with higher energy levels.
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La Grutta L, Toia P, Maffei E, Cademartiri F, Lagalla R, Midiri M. Infarct characterization using CT. Cardiovasc Diagn Ther 2017; 7:171-188. [PMID: 28540212 DOI: 10.21037/cdt.2017.03.18] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Myocardial infarction (MI) is a major cause of death and disability worldwide. The incidence is not expected to diminish, despite better prevention, diagnosis and treatment, because of the ageing population in industrialized countries and unhealthy lifestyles in developing countries. Nowadays it is highly requested an imaging tool able to evaluate MI and viability. Technology improvements determined an expansion of clinical indications from coronary plaque evaluation to functional applications (perfusion, ischemia and viability after MI) integrating additional phases and information in the mainstream examination. Cardiac computed tomography (CCT) and cardiac MR (CMR) employ different contrast media, but may characterize MI with overlapping imaging findings due to the similar kinetics and tissue distribution of gadolinium and iodinated contrast media. CCT may detect first-pass perfusion defects, dynamic perfusion after pharmacological stress, and delayed enhancement (DE) of non-viable territories.
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Affiliation(s)
| | - Patrizia Toia
- Department of Radiology, DIBIMED, University of Palermo, Palermo, Italy
| | - Erica Maffei
- Department of Radiology, Montreal Heart Institute/Universitè de Montreal, Montreal, Canada
| | - Filippo Cademartiri
- Department of Radiology, Montreal Heart Institute/Universitè de Montreal, Montreal, Canada.,Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Roberto Lagalla
- Department of Radiology, DIBIMED, University of Palermo, Palermo, Italy
| | - Massimo Midiri
- Department of Radiology, DIBIMED, University of Palermo, Palermo, Italy
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Patel AR, Bhave NM, Mor-Avi V. Myocardial perfusion imaging with cardiac computed tomography: state of the art. J Cardiovasc Transl Res 2013; 6:695-707. [PMID: 23963959 DOI: 10.1007/s12265-013-9499-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 07/07/2013] [Indexed: 10/26/2022]
Abstract
Cardiac computed tomography (CCT) has become an important tool for the anatomic assessment of patients with suspected coronary disease. Its diagnostic accuracy for detecting the presence of underlying coronary artery disease and ability to risk stratify patients are well documented. However, the role of CCT for the physiologic assessment of myocardial perfusion during resting and stress conditions is only now emerging. With the addition of myocardial perfusion imaging to coronary imaging, CCT has the potential to assess both coronary anatomy and its functional significance with a single non-invasive test. In this review, we discuss the current state of CCT myocardial perfusion imaging for the detection of myocardial ischemia and myocardial infarction and examine its complementary role to CCT coronary imaging.
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Affiliation(s)
- Amit R Patel
- Department of Medicine, Section of Cardiology, Cardiac Imaging Center, University of Chicago, Medical Center, 5841 South Maryland Avenue, MC5084, Chicago, IL, 60637, USA,
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Resting cardiac 64-MDCT does not reliably detect myocardial ischemia identified by radionuclide imaging. AJR Am J Roentgenol 2013; 200:337-42. [PMID: 23345355 DOI: 10.2214/ajr.11.8171] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE CT myocardial perfusion imaging is an emerging diagnostic modality that is under intensive study but not yet widely used in clinical practice. The purpose of this study is to evaluate the performance of resting 64-MDCT in revealing ischemia identified on radionuclide myocardial perfusion imaging (MPI). MATERIALS AND METHODS We retrospectively identified 35 patients (20 women and 15 men; mean age, 52 years) with myocardial ischemia found on MPI who underwent retrospectively gated CT within 90 days of MPI. Myocardial perfusion on CT was evaluated using both a visual (n = 35) and an automated (n = 34) method. For the visual method, myocardial segments were evaluated qualitatively in systole and diastole. For the automated method, subendocardial perfusion of the standard 17 American Heart Association segments was measured using a commercially available tool in both systole and diastole. Differences between systolic and diastolic perfusion were computed. RESULTS Five hundred eighty myocardial segments were evaluated, 152 of which were ischemic on MPI. Visual analysis had a sensitivity of 16% (24/152), specificity of 92% (393/428), positive predictive value of 40% (24/60), and negative predictive value of 75% (392/520) in systole, and a sensitivity of 18% (27/152), specificity of 89% (382/428), positive predictive value of 37% (27/73), and negative predictive value of 75% (382/507) in diastole, as compared with MPI. There was no significant difference in subendocardial perfusion between ischemic and nonischemic segments by the automated method. There was no significant difference in CT perfusion between patients with and without obstructive coronary artery disease on CT angiography using the visual or automated methods. CONCLUSION Resting 64-MDCT is unsuitable for clinical use in revealing ischemia seen on MPI.
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Fuchs TA, Ghadri JR, Stehli J, Gebhard C, Kazakauskaite E, Klaeser B, Gaemperli O, Fiechter M, Kaufmann PA. Hypodense regions in unenhanced CT identify nonviable myocardium: validation versus 18F-FDG PET. Eur J Nucl Med Mol Imaging 2012; 39:1920-6. [PMID: 22926710 DOI: 10.1007/s00259-012-2212-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 07/31/2012] [Indexed: 11/30/2022]
Abstract
PURPOSE The aim of the present study was to evaluate the accuracy of hypodense regions in non-contrast-enhanced cardiac computed tomography (unenhanced CT) to identify nonviable myocardial scar tissue. METHODS Hypodense areas were visually identified in unenhanced CT of 80 patients in the left ventricular anterior, apical, septal, lateral and inferior myocardium and CT density was measured in Hounsfield units (HU). Findings were compared to (18)F-fluorodeoxyglucose uptake by positron emission tomography (FDG PET), which served as the standard of reference to distinguish scar (<50 % FDG uptake) from viable tissue (≥50 % uptake). RESULTS Visually detected hypodense regions demonstrated a sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of 74, 97, 84 and 94 %, respectively. A receiver-operating characteristic (ROC) curve analysis revealed a cutoff value of mean HU at <28.8 for predicting scar tissue with an area under the curve of 0.93 yielding a sensitivity, specificity, PPV and NPV of 94, 90, 67 and 99 %, respectively. CONCLUSION Hypodense regions in unenhanced cardiac CT scans allow accurate identification of nonviable myocardial scar tissue.
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Affiliation(s)
- Tobias A Fuchs
- Department of Radiology, Cardiac Imaging, University Hospital Zurich, Switzerland
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Madaj P, Budoff MJ. Risk stratification of non-contrast CT beyond the coronary calcium scan. J Cardiovasc Comput Tomogr 2012; 6:301-7. [PMID: 22981856 DOI: 10.1016/j.jcct.2012.02.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 01/21/2012] [Accepted: 02/27/2012] [Indexed: 11/28/2022]
Abstract
Coronary artery calcification (CAC) is a well-known marker for coronary artery disease and has important prognostic implications. CAC is able to provide clinicians with a reliable source of information related to cardiovascular atherosclerosis, which carries incremental information beyond Framingham risk. However, non-contrast scans of the heart provide additional information beyond the Agatston score. These studies are also able to measure various sources of fat, including intrathoracic (eg, pericardial or epicardial) and hepatic, both of which are thought to be metabolically active and linked to increased incidence of subclinical atherosclerosis as well as increased prevalence of type 2 diabetes. Testing for CAC is also useful in identifying extracoronary sources of calcification. Specifically, aortic valve calcification, mitral annular calcification, and thoracic aortic calcium (TAC) provide additional risk stratification information for cardiovascular events. Finally, scanning for CAC is able to evaluate myocardial scaring due to myocardial infarcts, which may also add incremental prognostic information. To ensure the benefits outweigh the risks of a scanning for CAC for an appropriately selected asymptomatic patient, the full utility of the scan should be realized. This review describes the current state of the art interpretation of non-contrast cardiac CT, which clinically should go well beyond coronary artery Agatston scoring alone.
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Affiliation(s)
- Paul Madaj
- Department of Medicine, Division of Cardiology, Los Angeles Biomedical Research Institution at Harbor-UCLA, 1124 W Carson St, Torrance, CA 90505, USA
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CT of coronary heart disease: Part 1, CT of myocardial infarction, ischemia, and viability. AJR Am J Roentgenol 2012; 198:531-47. [PMID: 22357992 DOI: 10.2214/ajr.11.7082] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE This article reviews the CT-based approaches aimed at the assessment of myocardial infarction, ischemia, and viability described in the recent literature. CONCLUSION Rapid advances in CT technology not only have improved visualization of coronary arteries but also increasingly enable noncoronary myocardial applications, including analysis of wall motion and the state of the myocardial blood supply. These advancements hold promise for eventually accomplishing the goal of comprehensively evaluating coronary heart disease with a single noninvasive modality.
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Mehra VC, Valdiviezo C, Arbab-Zadeh A, Ko BS, Seneviratne SK, Cerci R, Lima JAC, George RT. A stepwise approach to the visual interpretation of CT-based myocardial perfusion. J Cardiovasc Comput Tomogr 2011; 5:357-69. [PMID: 22146495 DOI: 10.1016/j.jcct.2011.10.010] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 10/25/2011] [Accepted: 10/26/2011] [Indexed: 11/15/2022]
Abstract
Cardiovascular anatomic and functional testing have been longstanding and key components of cardiac risk assessment. As part of that strategy, CT-based imaging has made steady progress, with coronary computed tomography angiography (CTA) now established as the most sensitive noninvasive strategy for assessment of significant coronary artery disease. Myocardial CT perfusion imaging (CTP), as the functional equivalent of coronary CTA, is being tested in currently ongoing multicenter trials and is proposed to enhance the accuracy of coronary CTA alone. However, unlike coronary CTA that has published guidelines for interpretation and is rapidly gaining applicability in the noninvasive risk assessment paradigms, myocardial CTP is rapidly evolving, and guidance on a standard approach to its interpretation is lacking. In this article we describe a practical stepwise approach for interpretation of myocardial CTP that should add to the clinical applicability of this modality. These steps include (1) coronary CTA interpretation for potentially obstructive atherosclerosis, (2) reconstruction and preprocessing of myocardial CTP images, (3) image quality assessment and the identification of potentially confounding artifacts, (4) rest and stress image interpretation for enhancement patterns and areas of hypoattenuation, and (5) correlation of coronary anatomy and myocardial perfusion deficits. This systematic review uses already published methods from multiple clinical studies and is intended for general usage, independent of the platform used for image acquisition.
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Gupta M, Kadakia J, Hacioglu Y, Ahmadi N, Patel A, Choi T, Yamada G, Budoff M. Non-contrast cardiac computed tomography can accurately detect chronic myocardial infarction: Validation study. J Nucl Cardiol 2011; 18:96-103. [PMID: 21128040 PMCID: PMC3032183 DOI: 10.1007/s12350-010-9314-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Accepted: 10/25/2010] [Indexed: 11/29/2022]
Abstract
BACKGROUND This study evaluates whether non-contrast cardiac computed tomography (CCT) can detect chronic myocardial infarction (MI) in patients with irreversible perfusion defects on nuclear myocardial perfusion imaging (MPI). METHODS One hundred twenty-two symptomatic patients with irreversible perfusion defect (N = 62) or normal MPI (N = 60) underwent coronary artery calcium (CAC) scanning. MI on these non-contrast CCTs was visually detected based on the hypo-attenuation areas (dark) in the myocardium and corresponding Hounsfield units (HU) were measured. RESULTS Non-contrast CCT accurately detected MI in 57 patients with irreversible perfusion defect on MPI, yielding a sensitivity of 92%, specificity of 72%, negative predictive value (NPV) of 90%, and a positive predictive value (PPV) of 77%. On a per myocardial region analysis, non-contrast CT showed a sensitivity of 70%, specificity of 85%, NPV of 91%, and a PPV of 57%. The ROC curve showed that the optimal cutoff value of LV myocardium HU to predict MI on non-contrast CCT was 21.7 with a sensitivity of 97.4% and specificity of 99.7%. CONCLUSION Non-contrast CCT has an excellent agreement with MPI in detecting chronic MI. This study highlights a novel clinical utility of non-contrast CCT in addition to assessment of overall burden of atherosclerosis measured by CAC.
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Affiliation(s)
- Mohit Gupta
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, CA 90502, USA.
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Rodríguez-Granillo GA, Ingino CA, Lylyk P. Myocardial perfusion imaging and infarct characterization using multidetector cardiac computed tomography. World J Cardiol 2010; 2:198-204. [PMID: 21160751 PMCID: PMC2999055 DOI: 10.4330/wjc.v2.i7.198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 06/29/2010] [Accepted: 07/06/2010] [Indexed: 02/06/2023] Open
Abstract
Until recently, computed tomography coronary angiography was restricted to the anatomical assessment of coronary stenosis, whereas the functional significance of coronary lesions remained outside of its scope. Nevertheless, the kinetics of iodinated contrast is similar to gadolinium-diethylenetriamine pentaacetic acid used in contrast-enhanced magnetic resonance imaging, allowing assessment of myocardial perfusion and viability by cardiac computed tomography.
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Affiliation(s)
- Gastón A Rodríguez-Granillo
- Gastón A Rodríguez-Granillo, Carlos A Ingino, Pedro Lylyk, Department of Cardiovascular Imaging, Clínica La Sagrada Familia, José Hernández 1642 C1426EOB, Buenos Aires, Argentina
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George RT, Lardo AC. Infarct detection or infarct characterization? Noncontrast CT and its implications for characterizing chronic myocardial scar. J Cardiovasc Comput Tomogr 2010; 4:108-9. [DOI: 10.1016/j.jcct.2010.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 03/03/2010] [Indexed: 11/17/2022]
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