57c7482b2a4537575fd4dbed545090dc 335899.pdf c8d83b261f539ee02c89d92005b51e8411233441 335899.pdf 7f7ce3f382ca70b83978c18eeff50f3a7614a09089c2ccd6e33c6543e2723266 335899.pdf Title: Lipomatous metaplasia in cardiac CT: when ‘normal’ extracellular volume does not indicate myocardial viability - a case report Subject: DOI: 10.1093/ehjcr/ytaf612; European Heart Journal - Case Reports, 9, 12, 2025-12-01.; Abstract: Background: Extracellular-volume (ECV) mapping derived from dual-energy cardiac computed tomography (DE-CT) demonstrates potential for informing myocardial-viability assessment. However, intramyocardial lipomatous metaplasia (LM)—a frequent sequel of chronic infarction—contains little or no interstitial space and may therefore normalize ECV values, falsely suggesting viable tissue. Case Summary: A 65-year-old man with chronic total occlusion of the left anterior descending (LAD) artery underwent multimodality imaging to guide revascularisation. Cardiac magnetic resonance (CMR) demonstrated a transmural, thinned scar in the antero-septal apex and sub-endocardial fibrosis in basal–mid anterior segments. DE-CT demonstrated low attenuation in the same territory, whereas ECV mapping revealed normal values in the scarred apex (comparable to non-infarcted myocardium) and mildly elevated ECV in the basal–mid anterior segments with non-transmural scar. The presence of chemical-shift artefacts on cine CMR, along with further attenuation reduction on DE-CT, confirmed intramyocardial fat, explaining the paradoxically low ECV in this region. Ultimately, the integrated assessment of limited viability, extensive scar remodelling, and high-risk procedural features led to the decision to defer revascularization. Discussion: LM can obscure chronic infarcted myocardium on CT-derived ECV maps by abolishing extracellular expansion and generating deceptively normal values. Reliable interpretation mandates correlation with tissue attenuation, mono-energetic reconstructions, or fat-sensitive CMR sequences. DE-CT affords single-acquisition, high-resolution characterization of both ECV and tissue composition, but its quantitative outputs must be contextualized to avoid misclassification of viability. Awareness of this pitfall is essential for accurate decision-making in chronic ischaemic heart Keywords: Dual Energy CT; Cardiac Magnetic Resonance; Multimodal Imaging; Lipomatous Metaplasia; Coronary Artery Disease; Case Report Author: Konrad Pieszko Creator: Servigistics Arbortext Advanced Print Publisher 11.1.4546/W-x64 Producer: PDFlib+PDI 9.0.7p3 (C++/Win64); modified using iTextSharp.LGPLv2.Core 3.7.4.0 CreationDate: Tue Dec 9 13:55:51 2025 CET ModDate: Mon Sep 7 10:55:49 2026 CEST Custom Metadata: yes Metadata Stream: yes Tagged: yes UserProperties: no Suspects: no Form: none JavaScript: no Pages: 5 Encrypted: no Page size: 595.276 x 793.701 pts Page rot: 0 File size: 685615 bytes Optimized: no PDF version: 1.6 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- VXQSDO+GillSansNova-Book CID TrueType Identity-H yes yes yes 21 0 PYITUA+GillSansNova-Bold CID TrueType Identity-H yes yes yes 20 0 CVJEOI+GillSansNova-BookItalic CID TrueType Identity-H yes yes yes 22 0 XWVHXF+GillSansNova-Heavy CID TrueType Identity-H yes yes yes 29 0 MDTHLN+TimesNewRomanPSMT CID TrueType Identity-H yes yes yes 23 0 EZXNOW+SourceSansPro-Regular Type 1C Custom yes yes yes 344 0 VFGSVI+ArialMT TrueType WinAnsi yes yes no 1 0 AURERM+STIXGeneral-Regular Type 1C Custom yes yes yes 24 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2026-09-08 04:12:43 CEST RepresentationInformation: 335899.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2026-09-07 11:01:42 CEST Size: 685615 Format: PDF Version: 1.6 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf Profile: Tagged PDF PDFMetadata: Objects: 392 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: ViewerPreferences: HideToolbar: false HideMenubar: false HideWindowUI: false FitWindow: false CenterWindow: false DisplayDocTitle: true NonFullScreenPageMode: UseNone Direction: L2R ViewArea: CropBox ViewClip: CropBox PrintArea: CropBox PageClip: CropBox PageLayout: OneColumn PageMode: UseOutlines Language: en Outlines: Item: Title: Lipomatous metaplasia in cardiac CT: when ‘normal’ extracellular volume does not indicate myocardial viability - a case report Destination: head1 Children: Item: Title: Introduction Destination: secytaf612-s1 Item: Title: Summary figure Destination: secytaf612-s2 Item: Title: Case presentation Destination: secytaf612-s4 Item: Title: Discussion Destination: secytaf612-s5 Item: Title: Conclusions Destination: secytaf612-s6 Item: Title: Lead author biography Destination: secytaf612-s3 Item: Title: Supplementary material Destination: secytaf612-s7 Item: Title: Author contributions Destination: secytaf612-s8 Item: Title: Funding Destination: secytaf612-s10 Item: Title: Data availability Destination: secytaf612-s11 Item: Title: References Destination: reflist Info: Title: Lipomatous metaplasia in cardiac CT: when ‘normal’ extracellular volume does not indicate myocardial viability - a case report Author: Konrad Pieszko Subject: DOI: 10.1093/ehjcr/ytaf612; European Heart Journal - Case Reports, 9, 12, 2025-12-01.; Abstract: Background: Extracellular-volume (ECV) mapping derived from dual-energy cardiac computed tomography (DE-CT) demonstrates potential for informing myocardial-viability assessment. However, intramyocardial lipomatous metaplasia (LM) a frequent sequel of chronic infarction contains little or no interstitial space and may therefore normalize ECV values, falsely suggesting viable tissue. Case Summary: A 65-year-old man with chronic total occlusion of the left anterior descending (LAD) artery underwent multimodality imaging to guide revascularisation. Cardiac magnetic resonance (CMR) demonstrated a transmural, thinned scar in the antero-septal apex and sub-endocardial fibrosis in basal mid anterior segments. DE-CT demonstrated low attenuation in the same territory, whereas ECV mapping revealed normal values in the scarred apex (comparable to non-infarcted myocardium) and mildly elevated ECV in the basal mid anterior segments with non-transmural scar. The presence of chemical-shift artefacts on cine CMR, along with further attenuation reduction on DE-CT, confirmed intramyocardial fat, explaining the paradoxically low ECV in this region. Ultimately, the integrated assessment of limited viability, extensive scar remodelling, and high-risk procedural features led to the decision to defer revascularization. Discussion: LM can obscure chronic infarcted myocardium on CT-derived ECV maps by abolishing extracellular expansion and generating deceptively normal values. Reliable interpretation mandates correlation with tissue attenuation, mono-energetic reconstructions, or fat-sensitive CMR sequences. DE-CT affords single-acquisition, high-resolution characterization of both ECV and tissue composition, but its quantitative outputs must be contextualized to avoid misclassification of viability. Awareness of this pitfall is essential for accurate decision-making in chronic ischaemic heart Keywords: Dual Energy CT; Cardiac Magnetic Resonance; Multimodal Imaging; Lipomatous Metaplasia; Coronary Artery Disease; Case Report Creator: Servigistics Arbortext Advanced Print Publisher 11.1.4546/W-x64 Producer: PDFlib+PDI 9.0.7p3 (C++/Win64); modified using iTextSharp.LGPLv2.Core 3.7.4.0 CreationDate: Tue Dec 09 14:25:51 CET 2025 ModDate: Mon Sep 07 10:55:49 CEST 2026 ID: 0x1dfe293d9a7ea9a57377977d67ef889c, 0x3cfcf7adf48da241d490984d3defdc35 Filters: FilterPipeline: FlateDecode FilterPipeline: DCTDecode Images: Image: NisoImageMetadata: FormatName: image/jpg CompressionScheme: JPEG ImageWidth: 1360 ImageHeight: 730 BitsPerSample: 8 BitsPerSampleUnit: integer Image: NisoImageMetadata: FormatName: image/jpg CompressionScheme: JPEG ImageWidth: 1200 ImageHeight: 944 BitsPerSample: 8 BitsPerSampleUnit: integer Image: NisoImageMetadata: FormatName: image/jpg CompressionScheme: JPEG ImageWidth: 1032 ImageHeight: 812 BitsPerSample: 8 BitsPerSampleUnit: integer Image: NisoImageMetadata: FormatName: image/jpg CompressionScheme: JPEG ImageWidth: 860 ImageHeight: 631 BitsPerSample: 8 BitsPerSampleUnit: integer Image: NisoImageMetadata: FormatName: image/jpg CompressionScheme: JPEG ImageWidth: 275 ImageHeight: 354 BitsPerSample: 8 BitsPerSampleUnit: integer Fonts: Type0: Font: BaseFont: PYITUA+GillSansNova-Bold Encoding: Identity-H ToUnicode: true Font: BaseFont: VXQSDO+GillSansNova-Book Encoding: Identity-H ToUnicode: true Font: BaseFont: CVJEOI+GillSansNova-BookItalic Encoding: Identity-H ToUnicode: true Font: BaseFont: MDTHLN+TimesNewRomanPSMT Encoding: Identity-H ToUnicode: true Font: BaseFont: XWVHXF+GillSansNova-Heavy Encoding: Identity-H ToUnicode: true Type1: Font: BaseFont: EZXNOW+SourceSansPro-Regular FontSubset: true FirstChar: 1 LastChar: 1 FontDescriptor: FontName: EZXNOW+SourceSansPro-Regular Flags: Nonsymbolic FontBBox: -192, -323, 1160, 952 FontFile3: true EncodingDictionary: BaseEncoding: WinAnsiEncoding Differences: true ToUnicode: true Font: BaseFont: AURERM+STIXGeneral-Regular FontSubset: true FirstChar: 1 LastChar: 3 FontDescriptor: FontName: AURERM+STIXGeneral-Regular Flags: Nonsymbolic FontBBox: -995, -455, 2000, 1055 FontFile3: true EncodingDictionary: BaseEncoding: WinAnsiEncoding Differences: true ToUnicode: true TrueType: Font: BaseFont: VFGSVI+ArialMT FontSubset: true FirstChar: 32 LastChar: 121 FontDescriptor: FontName: VFGSVI+ArialMT Flags: Nonsymbolic FontBBox: -664, -324, 2000, 1039 FontFile2: true Encoding: WinAnsiEncoding CIDFontType2: Font: BaseFont: VXQSDO+GillSansNova-Book CIDSystemInfo: Registry: Adobe Registry: Identity Supplement: 0 FontDescriptor: FontName: VXQSDO+GillSansNova-Book Flags: Nonsymbolic FontBBox: -420, -251, 1219, 950 FontFile2: true Font: BaseFont: PYITUA+GillSansNova-Bold CIDSystemInfo: Registry: Adobe Registry: Identity Supplement: 0 FontDescriptor: FontName: PYITUA+GillSansNova-Bold Flags: Nonsymbolic, ForceBold FontBBox: -476, -276, 1276, 961 FontFile2: true Font: BaseFont: CVJEOI+GillSansNova-BookItalic CIDSystemInfo: Registry: Adobe Registry: Identity Supplement: 0 FontDescriptor: FontName: CVJEOI+GillSansNova-BookItalic Flags: Nonsymbolic, Italic FontBBox: -316, -235, 1219, 950 FontFile2: true Font: BaseFont: XWVHXF+GillSansNova-Heavy CIDSystemInfo: Registry: Adobe Registry: Identity Supplement: 0 FontDescriptor: FontName: XWVHXF+GillSansNova-Heavy Flags: Nonsymbolic, ForceBold FontBBox: -504, -287, 1375, 966 FontFile2: true Font: BaseFont: MDTHLN+TimesNewRomanPSMT CIDSystemInfo: Registry: Adobe Registry: Identity Supplement: 0 FontDescriptor: FontName: MDTHLN+TimesNewRomanPSMT Flags: Nonsymbolic FontBBox: -568, -307, 2046, 1040 FontFile2: true XMP: uuid:8eaa174d-be76-4c50-b17b-c86543ce760c uuid:F827FB1A-6748-23A3-CE67-467B129BF222 True Dual Energy CT; Cardiac Magnetic Resonance; Multimodal Imaging; Lipomatous Metaplasia; Coronary Artery Disease; Case Report PDFlib+PDI 9.0.7p3 (C++/Win64); modified using iTextSharp.LGPLv2.Core 3.7.4.0 application/pdf 10.1093/ehjcr/ytaf612 en Oxford University Press Lipomatous metaplasia in cardiac CT: when ‘normal’ extracellular volume does not indicate myocardial viability - a case report Konrad Pieszko Clara Rodríguez González Rubén Leta Petracca David Viladés Medel DOI: 10.1093/ehjcr/ytaf612; European Heart Journal - Case Reports, 9, 12, 2025-12-01.; Abstract: Background: Extracellular-volume (ECV) mapping derived from dual-energy cardiac computed tomography (DE-CT) demonstrates potential for informing myocardial-viability assessment. However, intramyocardial lipomatous metaplasia (LM)—a frequent sequel of chronic infarction—contains little or no interstitial space and may therefore normalize ECV values, falsely suggesting viable tissue. Case Summary: A 65-year-old man with chronic total occlusion of the left anterior descending (LAD) artery underwent multimodality imaging to guide revascularisation. Cardiac magnetic resonance (CMR) demonstrated a transmural, thinned scar in the antero-septal apex and sub-endocardial fibrosis in basal–mid anterior segments. DE-CT demonstrated low attenuation in the same territory, whereas ECV mapping revealed normal values in the scarred apex (comparable to non-infarcted myocardium) and mildly elevated ECV in the basal–mid anterior segments with non-transmural scar. The presence of chemical-shift artefacts on cine CMR, along with further attenuation reduction on DE-CT, confirmed intramyocardial fat, explaining the paradoxically low ECV in this region. Ultimately, the integrated assessment of limited viability, extensive scar remodelling, and high-risk procedural features led to the decision to defer revascularization. Discussion: LM can obscure chronic infarcted myocardium on CT-derived ECV maps by abolishing extracellular expansion and generating deceptively normal values. Reliable interpretation mandates correlation with tissue attenuation, mono-energetic reconstructions, or fat-sensitive CMR sequences. DE-CT affords single-acquisition, high-resolution characterization of both ECV and tissue composition, but its quantitative outputs must be contextualized to avoid misclassification of viability. Awareness of this pitfall is essential for accurate decision-making in chronic ischaemic heart © The Author(s) 2025. Published by Oxford University Press on behalf of the European Society of Cardiology. Dual Energy CT Cardiac Magnetic Resonance Multimodal Imaging Lipomatous Metaplasia Coronary Artery Disease Case Report Journal European Heart Journal - Case Reports © The Author(s) 2025. 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