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Hatfaludi CA, Tache IA, Ciusdel CF, Puiu A, Stoian D, Calmac L, Popa-Fotea NM, Bataila V, Scafa-Udriste A, Itu LM. Co-registered optical coherence tomography and X-ray angiography for the prediction of fractional flow reserve. THE INTERNATIONAL JOURNAL OF CARDIOVASCULAR IMAGING 2024; 40:1029-1039. [PMID: 38376719 DOI: 10.1007/s10554-024-03069-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/13/2024] [Indexed: 02/21/2024]
Abstract
Cardiovascular disease (CVD) stands as the leading global cause of mortality, and coronary artery disease (CAD) has the highest prevalence, contributing to 42% of these fatalities. Recognizing the constraints inherent in the anatomical assessment of CAD, Fractional Flow Reserve (FFR) has emerged as a pivotal functional diagnostic metric. Herein, we assess the potential of employing an ensemble approach with deep neural networks (DNN) to predict invasively measured Fractional Flow Reserve (FFR) using raw anatomical data extracted from both optical coherence tomography (OCT) and X-ray coronary angiography (XA). In this study, we used a challenging dataset, with 46% of the lesions falling within the FFR range of 0.75 to 0.85. Despite this complexity, our model achieved an accuracy of 84.3%, demonstrating a sensitivity of 87.5% and a specificity of 81.4%. Our results demonstrate that incorporating both OCT and XA signals, co-registered, as inputs for the DNN model leads to an important increase in overall accuracy.
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Affiliation(s)
- Cosmin-Andrei Hatfaludi
- Advanta, Siemens SRL, 15 Noiembrie Bvd, Brasov, 500097, Romania.
- Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, Brasov, 5000174, Romania.
| | - Irina-Andra Tache
- Advanta, Siemens SRL, 15 Noiembrie Bvd, Brasov, 500097, Romania
- Department of Automatic Control and Systems Engineering, University Politehnica of Bucharest, Bucharest, 014461, Romania
| | - Costin-Florian Ciusdel
- Advanta, Siemens SRL, 15 Noiembrie Bvd, Brasov, 500097, Romania
- Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, Brasov, 5000174, Romania
| | - Andrei Puiu
- Advanta, Siemens SRL, 15 Noiembrie Bvd, Brasov, 500097, Romania
- Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, Brasov, 5000174, Romania
| | - Diana Stoian
- Advanta, Siemens SRL, 15 Noiembrie Bvd, Brasov, 500097, Romania
- Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, Brasov, 5000174, Romania
| | - Lucian Calmac
- Department of Cardiology, Emergency Clinical Hospital, 8 Calea Floreasca, Bucharest, 014461, Romania
- Department Cardio-Thoracic, University of Medicine and Pharmacy "Carol Davila", 8 Eroii Sanitari, Bucharest, 050474, Romania
| | - Nicoleta-Monica Popa-Fotea
- Department of Cardiology, Emergency Clinical Hospital, 8 Calea Floreasca, Bucharest, 014461, Romania
- Department Cardio-Thoracic, University of Medicine and Pharmacy "Carol Davila", 8 Eroii Sanitari, Bucharest, 050474, Romania
| | - Vlad Bataila
- Department of Cardiology, Emergency Clinical Hospital, 8 Calea Floreasca, Bucharest, 014461, Romania
| | - Alexandru Scafa-Udriste
- Department of Cardiology, Emergency Clinical Hospital, 8 Calea Floreasca, Bucharest, 014461, Romania
- Department Cardio-Thoracic, University of Medicine and Pharmacy "Carol Davila", 8 Eroii Sanitari, Bucharest, 050474, Romania
| | - Lucian Mihai Itu
- Advanta, Siemens SRL, 15 Noiembrie Bvd, Brasov, 500097, Romania
- Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, Brasov, 5000174, Romania
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Li W, Takahashi T, Sehatbakhsh S, Parikh MA, Garcia-Garcia HM, Fearon WF, Kobayashi Y. Diagnostic performances of Nonhyperemic Pressure Ratios and Coronary Angiography-Based Fractional Flow Reserve against conventional Wire-Based Fractional Flow Reserve. Coron Artery Dis 2024; 35:83-91. [PMID: 38088790 DOI: 10.1097/mca.0000000000001309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
BACKGROUND Nonhyperemic pressure ratios (NHPRs) have been proposed as alternatives to fractional flow reserve (FFR) without induction of hyperemia. More recently, imaging based-FFR estimation, especially coronary angiography-derived FFR (Angio-FFR) measurement, is proposed to estimate wire-based FFR. However, little is known about the diagnostic performance of these indices against conventional FFR. AIMS We aimed to assess and compare the diagnostic performance of both NHPRs and coronary Angio-FFR against wire-based conventional FFR. METHODS PubMed and Embase databases were systematically searched for peer-reviewed original articles up to 08/2022. The primary outcomes were the pooled sensitivity and specificity as well as the area under the curve (AUC) of the summary receiver-operating characteristic curve of those indices. RESULTS A total of 6693 records were identified after a literature search, including 37 reports for NHPRs and 34 for Angio-FFR. Overall, NHPRs have a lower diagnostic performance in estimating wire-based FFR with an AUC of 0.85 (0.81, 0.88) when compared with Angio-FFR of 0.95 (0.93, 0.97). When all four modalities of NHPRs (iFR, Pd/Pa, DPR, RFR) were compared, those had overlapping AUCs without major differences among each other. Similarly, when the two most commonly used Angio-FFR (QFR, FFR angio ) were compared, those had overlapping AUCs without major differences among each other. CONCLUSION Angio-FFR may offer a better estimation of wire-based FFR than NHPRs. Our results support a wider use of Angio-FFR in the cardiac catheterization laboratory to streamline our workflow for coronary physiologic assessment. CLASSIFICATIONS FFR,, stable ischemic disease and non-ST elevation acute coronary syndrome.
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Affiliation(s)
- Weijia Li
- Heart, Lung and Vascular Institute, AdventHealth Orlando, Orlando, Florida
| | - Tatsunori Takahashi
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Samineh Sehatbakhsh
- Division of Cardiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York
| | - Manish A Parikh
- Division of Cardiology, New York-Presbyterian Brooklyn Methodist Hospital, Weill Cornell Medical College, Brooklyn, New York
| | - Hector M Garcia-Garcia
- Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, District of Columbia
| | - William F Fearon
- Division of Cardiovascular Medicine, Stanford University Medical Center, Stanford, California, USA
| | - Yuhei Kobayashi
- Division of Cardiology, New York-Presbyterian Brooklyn Methodist Hospital, Weill Cornell Medical College, Brooklyn, New York
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3
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Shabbir A, Travieso A, Mejía-Rentería H, Espejo-Paeres C, Gonzalo N, Banning AP, Serruys PW, Escaned J. Coronary Physiology as Part of a State-of-the-Art Percutaneous Coronary Intervention Strategy: Lessons from SYNTAX II and Beyond. Cardiol Clin 2024; 42:147-158. [PMID: 37949536 DOI: 10.1016/j.ccl.2023.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The use of coronary physiology allows for rational decision making at the time of PCI, contributing to better patient outcomes. Yet, coronary physiology is only one aspect of optimal revascularization. State-of-the-art PCI must also consider other important aspects such as intracoronary imaging guidance and specific procedural expertise, as tested in the SYNTAX II study. In this review, we highlight the technical aspects pertaining to the use of physiology as used in that trial and offer a glimpse into the future with emerging physiologic metrics, including functional coronary angiography, which have already established themselves as useful indices to guide decision making.
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Affiliation(s)
- Asad Shabbir
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Alejandro Travieso
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Hernán Mejía-Rentería
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Carolina Espejo-Paeres
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Nieves Gonzalo
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Adrian P Banning
- Heart Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Patrick W Serruys
- Department of Cardiology, National University of Ireland, Galway, Ireland; National Heart and Lung Institute, Imperial College London, London, UK
| | - Javier Escaned
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain.
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Tang X, Dai N, Zhang B, Cai H, Huo Y, Yang M, Jiang Y, Duan S, Shen J, Zhu M, Xu Y, Ge J. Comparison of 2D-QCA, 3D-QCA and coronary angiography derived FFR in predicting myocardial ischemia assessed by CZT-SPECT MPI. J Nucl Cardiol 2023; 30:1973-1982. [PMID: 36929293 DOI: 10.1007/s12350-023-03240-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 02/10/2023] [Indexed: 03/18/2023]
Abstract
BACKGROUND Angiography derived fractional flow reserve (angio-FFR) has been proposed. This study aimed to assess its diagnostic performance with cadmium-zinc-telluride single emission computed tomography (CZT-SPECT) as reference. METHODS AND RESULTS Patients underwent CZT-SPECT within 3 months of coronary angiography were included. Angio-FFR computation was performed using computational fluid dynamics. Percent diameter (%DS) and area stenosis (%AS) were measured by quantitative coronary angiography. Myocardial ischemia was defined as a summed difference score ≥ 2 in a vascular territory. Angio-FFR ≤ 0.80 was considered abnormal. 282 coronary arteries in 131 patients were analyzed. Overall accuracy of angio-FFR to detect ischemia on CZT-SPECT was 90.43%, with a sensitivity of 62.50% and a specificity of 98.62%. The diagnostic performance (= area under ROC = AUC) of angio-FFR [AUC = 0.91, 95% confidence intervals (CI) 0.86-0.95] was similar as those of %DS (AUC = 0.88, 95% CI 0.84-0.93, p = 0.326) and %AS (AUC = 0.88, 95% CI 0.84-0.93 p = 0.241) by 3D-QCA, but significantly higher than those of %DS (AUC = 0.59, 95% CI 0.51-0.67, p < 0.001) and %AS (AUC = 0.59, 95% CI 0.51-0.67, p < 0.001) by 2D-QCA. However, in vessels with 50-70% stenoses, AUC of angio-FFR was significantly higher than those of %DS (0.80 vs. 0.47, p < 0.001) and %AS (0.80 vs. 0.46, p < 0.001) by 3D-QCA and %DS (0.80 vs. 0.66, p = 0.036) and %AS (0.80 vs. 0.66, p = 0.034) by 2D-QCA. CONCLUSION Angio-FFR had a high accuracy in predicting myocardial ischemia assessed by CZT-SPECT, which is similar as 3D-QCA but significantly higher than 2D-QCA. While in intermediate lesions, angio-FFR is better than 3D-QCA and 2D-QCA in assessing myocardial ischemia.
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Affiliation(s)
- Xianglin Tang
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Xuhui District, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Neng Dai
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Xuhui District, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - BuChun Zhang
- Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Haidong Cai
- Department of Nuclear Medicine, Shanghai Tenth People's Hospital, Shanghai, China
| | - Yanlei Huo
- Department of Nuclear Medicine, Shanghai Tenth People's Hospital, Shanghai, China
| | - Mengdie Yang
- Department of Nuclear Medicine, Shanghai Tenth People's Hospital, Shanghai, China
| | - Yongji Jiang
- Department of Nuclear Medicine, Shanghai Tenth People's Hospital, Shanghai, China
| | | | - Jianying Shen
- Cardiology Department, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Yanchang Road, Shanghai, 200072, China
| | - Mengyun Zhu
- Cardiology Department, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Yanchang Road, Shanghai, 200072, China
| | - Yawei Xu
- Cardiology Department, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Yanchang Road, Shanghai, 200072, China.
| | - Junbo Ge
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Xuhui District, Shanghai, 200032, China.
- National Clinical Research Center for Interventional Medicine, Shanghai, China.
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Leung CKL, Lam LY, Li KY, Feng Y, Cao G, Wu M, Wang R, Wu MZ, Ren QW, Yu SY, Tse YK, Li HL, Yu SY, Tse HF, Xu B, Yiu KH. Clinical Value of Computational Angiography-derived Fractional Flow Reserve in Stable Coronary Artery Disease. J Cardiovasc Transl Res 2023; 16:1166-1176. [PMID: 36991293 DOI: 10.1007/s12265-023-10381-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 03/20/2023] [Indexed: 03/31/2023]
Abstract
The utilization of FFR remains low. Our study evaluated the per-vessel prognostic value of computational pressure-flow dynamics-derived FFR (caFFR) among patients with stable coronary artery disease. A total of 3329 vessels from 1308 patients were included and analysed. They were stratified into ischaemic (caFFR ≤ 0.8) and non-ischaemic (caFFR > 0.8) cohorts, and the associations between PCI and outcomes were evaluated. The third cohort comprised all included vessels, and the associations between treatment adherent-to-caFFR (PCI in vessels with caFFR ≤ 0.8 and no PCI in vessels with caFFR > 0.8) and outcomes were evaluated. The primary outcome was VOCE, defined as a composite of vessel-related cardiovascular mortality, non-fatal myocardial infarction, and repeat revascularization. PCI was associated with a lower 3-year risk of VOCE in the ischaemic cohort (HR, 0.44; 95% CI, 0.26-0.74; P = 0.002) but not in the non-ischaemic cohort. The risk of VOCE was lower in the adherent-to-caFFR group (n = 2649) (HR, 0.69; 95% CI, 0.48-0.98; P = 0.039). A novel index that uses coronary angiography images to estimate FFR may have substantial clinical value in guiding management among patients with stable coronary artery disease.
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Affiliation(s)
- Calvin Ka-Lam Leung
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Lok-Yee Lam
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Kwan-Yu Li
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Yundi Feng
- PKU-HKUST Shenzhen-Hongkong Institution, Shenzhen, China
| | - Gaozhen Cao
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
| | - Min Wu
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
| | - Run Wang
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
| | - Mei-Zhen Wu
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Qing-Wen Ren
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Si-Yeung Yu
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Yi-Kei Tse
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Hang-Long Li
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Shuk-Yin Yu
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Hung-Fat Tse
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China
| | - Bo Xu
- National Center for Cardiovascular Diseases, Fu Wai Hospital, Chinese Academy of Medical Sciences, Beijing, China
- National Clinical Research Center for Cardiovascular Diseases, Beijing, China
| | - Kai-Hang Yiu
- Division of Cardiology, Department of Medicine, the University of Hong Kong Shenzhen Hospital, Shenzhen, China.
- Division of Cardiology, Department of Medicine, the University of Hong Kong, Queen Mary Hospital, Room 1929B/K1931, 19/F, Block K, Hong Kong, China.
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Peper J, Bots ML, Leiner T, Swaans MJ. Non-invasive Angiographic-based Fractional Flow Reserve: Technical Development, Clinical Implications, and Future Perspectives. Curr Med Sci 2023:10.1007/s11596-023-2751-4. [PMID: 37055655 DOI: 10.1007/s11596-023-2751-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 05/30/2022] [Indexed: 04/15/2023]
Abstract
New non- and less-invasive techniques have been developed to overcome the procedural and operator related burden of the fractional flow reserve (FFR) for the assessment of potentially significant stenosis in the coronary arteries. Virtual FFR-techniques can obviate the need for the additional flow or pressure wires as used for FFR measurements. This review provides an overview of the developments and validation of the virtual FFR-algorithms, states the challenges, discusses the upcoming clinical trials, and postulates the future role of virtual FFR in the clinical practice.
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Affiliation(s)
- Joyce Peper
- Department of Cardiology, St. Antonius Hospital, 3435 CM, Nieuwegein, The Netherlands.
- Department of Radiology, University Medical Center Utrecht, 3508 GA, Utrecht, The Netherlands.
| | - Michiel L Bots
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, 3584 CG, Utrecht, The Netherlands
| | - Tim Leiner
- Department of Radiology, University Medical Center Utrecht, 3508 GA, Utrecht, The Netherlands
| | - Martin J Swaans
- Department of Cardiology, St. Antonius Hospital, 3435 CM, Nieuwegein, The Netherlands
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Shabbir A, Travieso A, Mejía-Rentería H, Espejo-Paeres C, Gonzalo N, Banning AP, Serruys PW, Escaned J. Coronary Physiology as Part of a State-of-the-Art Percutaneous Coronary Intervention Strategy: Lessons from SYNTAX II and Beyond. Interv Cardiol Clin 2023; 12:141-153. [PMID: 36372458 DOI: 10.1016/j.iccl.2022.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The use of coronary physiology allows for rational decision making at the time of PCI, contributing to better patient outcomes. Yet, coronary physiology is only one aspect of optimal revascularization. State-of-the-art PCI must also consider other important aspects such as intracoronary imaging guidance and specific procedural expertise, as tested in the SYNTAX II study. In this review, we highlight the technical aspects pertaining to the use of physiology as used in that trial and offer a glimpse into the future with emerging physiologic metrics, including functional coronary angiography, which have already established themselves as useful indices to guide decision making.
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Affiliation(s)
- Asad Shabbir
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Alejandro Travieso
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Hernán Mejía-Rentería
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Carolina Espejo-Paeres
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Nieves Gonzalo
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain
| | - Adrian P Banning
- Heart Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Patrick W Serruys
- Department of Cardiology, National University of Ireland, Galway, Ireland; National Heart and Lung Institute, Imperial College London, London, UK
| | - Javier Escaned
- Interventional Cardiology Unit, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, Calle del Prof Martín Lagos, Madrid 28040, Spain.
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Tanade C, Chen SJ, Leopold JA, Randles A. Analysis identifying minimal governing parameters for clinically accurate in silico fractional flow reserve. FRONTIERS IN MEDICAL TECHNOLOGY 2022; 4:1034801. [PMID: 36561284 PMCID: PMC9764219 DOI: 10.3389/fmedt.2022.1034801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 11/10/2022] [Indexed: 12/12/2022] Open
Abstract
Background Personalized hemodynamic models can accurately compute fractional flow reserve (FFR) from coronary angiograms and clinical measurements (FFR baseline ), but obtaining patient-specific data could be challenging and sometimes not feasible. Understanding which measurements need to be patient-tuned vs. patient-generalized would inform models with minimal inputs that could expedite data collection and simulation pipelines. Aims To determine the minimum set of patient-specific inputs to compute FFR using invasive measurement of FFR (FFR invasive ) as gold standard. Materials and Methods Personalized coronary geometries ( N = 50 ) were derived from patient coronary angiograms. A computational fluid dynamics framework, FFR baseline , was parameterized with patient-specific inputs: coronary geometry, stenosis geometry, mean arterial pressure, cardiac output, heart rate, hematocrit, and distal pressure location. FFR baseline was validated against FFR invasive and used as the baseline to elucidate the impact of uncertainty on personalized inputs through global uncertainty analysis. FFR streamlined was created by only incorporating the most sensitive inputs and FFR semi-streamlined additionally included patient-specific distal location. Results FFR baseline was validated against FFR invasive via correlation ( r = 0.714 , p < 0.001 ), agreement (mean difference: 0.01 ± 0.09 ), and diagnostic performance (sensitivity: 89.5%, specificity: 93.6%, PPV: 89.5%, NPV: 93.6%, AUC: 0.95). FFR semi-streamlined provided identical diagnostic performance with FFR baseline . Compared to FFR baseline vs. FFR invasive , FFR streamlined vs. FFR invasive had decreased correlation ( r = 0.64 , p < 0.001 ), improved agreement (mean difference: 0.01 ± 0.08 ), and comparable diagnostic performance (sensitivity: 79.0%, specificity: 90.3%, PPV: 83.3%, NPV: 87.5%, AUC: 0.90). Conclusion Streamlined models could match the diagnostic performance of the baseline with a full gamut of patient-specific measurements. Capturing coronary hemodynamics depended most on accurate geometry reconstruction and cardiac output measurement.
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Affiliation(s)
- Cyrus Tanade
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| | - S. James Chen
- Department of Medicine, University of Colorado, Aurora, CO, United States
| | - Jane A. Leopold
- Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston, MA, United States
| | - Amanda Randles
- Department of Biomedical Engineering, Duke University, Durham, NC, United States,Correspondence: Amanda Randles
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Agujetas R, Ferrera C, González-Fernández R, Nogales-Asensio JM, Fernández-Tena A. Influence of the position of the distal pressure measurement point on the Fractional Flow Reserve using in-silico simulations. Biocybern Biomed Eng 2022. [DOI: 10.1016/j.bbe.2022.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Ploscaru V, Popa-Fotea NM, Calmac L, Itu LM, Mihai C, Bataila V, Dragoescu B, Puiu A, Cojocaru C, Costin MA, Scafa-Udriste A. Artificial intelligence and cloud based platform for fully automated PCI guidance from coronary angiography-study protocol. PLoS One 2022; 17:e0274296. [PMID: 36084034 PMCID: PMC9462679 DOI: 10.1371/journal.pone.0274296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/23/2022] [Indexed: 11/18/2022] Open
Abstract
Ischemic heart disease represent a heavy burden for the medical systems irrespective of the methods used for diagnosis and treatment of such patients in the daily medical routine. The present paper depicts the protocol of a study whose main aim is to develop, implement and test an artificial intelligence algorithm and cloud based platform for fully automated PCI guidance using coronary angiography images. We propose the utilisation of multiple artificial intelligence based models to produce three-dimensional coronary anatomy reconstruction and assess function- post-PCI FFR computation- for developing an extensive report describing and motivating the optimal PCI strategy selection. All the relevant artificial intelligence model outputs (anatomical and functional assessment–pre- and post-PCI) are presented to the clinician via a cloud platform, who can then take the utmost treatment decision. The physician will be provided with multiple scenarios and treatment possibilities for the same case allowing a real-time evaluation of the most appropriate PCI strategy planning and follow-up. The artificial intelligence algorithms and cloud based PCI selection workflow will be verified and validated in a pilot clinical study including subjects prospectively to compare the artificial intelligence services and results against annotations and invasive measurements.
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Affiliation(s)
- Vlad Ploscaru
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
| | - Nicoleta-Monica Popa-Fotea
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
- Department Cardio-Thoracic 4, University of Medicine and Pharmacy “Carol Davila”, Bucharest, Romania
- * E-mail:
| | - Lucian Calmac
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
| | - Lucian Mihai Itu
- Department of Image Fusion and Analytics, Siemens SRL, Brasov, Romania
- Department of Automation and Applied Informatics, Transylvania University of Brasov, Brasov, Romania
| | - Cosmin Mihai
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
| | - Vlad Bataila
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
| | - Bogdan Dragoescu
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
| | - Andrei Puiu
- Department of Image Fusion and Analytics, Siemens SRL, Brasov, Romania
- Department of Automation and Applied Informatics, Transylvania University of Brasov, Brasov, Romania
| | - Cosmin Cojocaru
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
- Department Cardio-Thoracic 4, University of Medicine and Pharmacy “Carol Davila”, Bucharest, Romania
| | | | - Alexandru Scafa-Udriste
- Department of Cardiology, Emergency Clinical Hospital, Bucharest, Romania
- Department Cardio-Thoracic 4, University of Medicine and Pharmacy “Carol Davila”, Bucharest, Romania
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11
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Towards a Deep-Learning Approach for Prediction of Fractional Flow Reserve from Optical Coherence Tomography. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12146964] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cardiovascular disease (CVD) is the number one cause of death worldwide, and coronary artery disease (CAD) is the most prevalent CVD, accounting for 42% of these deaths. In view of the limitations of the anatomical evaluation of CAD, Fractional Flow Reserve (FFR) has been introduced as a functional diagnostic index. Herein, we evaluate the feasibility of using deep neural networks (DNN) in an ensemble approach to predict the invasively measured FFR from raw anatomical information that is extracted from optical coherence tomography (OCT). We evaluate the performance of various DNN architectures under different formulations: regression, classification—standard, and few-shot learning (FSL) on a dataset containing 102 intermediate lesions from 80 patients. The FSL approach that is based on a convolutional neural network leads to slightly better results compared to the standard classification: the per-lesion accuracy, sensitivity, and specificity were 77.5%, 72.9%, and 81.5%, respectively. However, since the 95% confidence intervals overlap, the differences are statistically not significant. The main findings of this study can be summarized as follows: (1) Deep-learning (DL)-based FFR prediction from reduced-order raw anatomical data is feasible in intermediate coronary artery lesions; (2) DL-based FFR prediction provides superior diagnostic performance compared to baseline approaches that are based on minimal lumen diameter and percentage diameter stenosis; and (3) the FFR prediction performance increases quasi-linearly with the dataset size, indicating that a larger train dataset will likely lead to superior diagnostic performance.
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12
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Scoccia A, Tomaniak M, Neleman T, Groenland FTW, Plantes ACZD, Daemen J. Angiography-Based Fractional Flow Reserve: State of the Art. Curr Cardiol Rep 2022; 24:667-678. [PMID: 35435570 PMCID: PMC9188492 DOI: 10.1007/s11886-022-01687-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/18/2022] [Indexed: 12/02/2022]
Abstract
Purpose of Review Three-dimensional quantitative coronary angiography-based methods of fractional flow reserve (FFR) derivation have emerged as an appealing alternative to conventional pressure-wire-based physiological lesion assessment and have the potential to further extend the use of physiology in general. Here, we summarize the current evidence related to angiography-based FFR and perspectives on future developments. Recent Findings Growing evidence suggests good diagnostic performance of angiography-based FFR measurements, both in chronic and acute coronary syndromes, as well as in specific lesion subsets, such as long and calcified lesions, left main coronary stenosis, and bifurcations. More recently, promising results on the superiority of angiography-based FFR as compared to angiography-guided PCI have been published. Summary Currently available angiography -FFR indices proved to be an excellent alternative to invasive pressure wire-based FFR. Dedicated prospective outcome data comparing these indices to routine guideline recommended PCI including the use of FFR are eagerly awaited.
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Affiliation(s)
- Alessandra Scoccia
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, room Rg-628, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Mariusz Tomaniak
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, room Rg-628, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.,First Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Tara Neleman
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, room Rg-628, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Frederik T W Groenland
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, room Rg-628, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Annemieke C Ziedses des Plantes
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, room Rg-628, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Joost Daemen
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, room Rg-628, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
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13
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Zhou Z, Zhu B, Fan F, Yang F, Fang S, Wang Z, Qiu L, Gong Y, Huo Y. Prognostic Value of Coronary Angiography-Derived Fractional Flow Reserve Immediately After Stenting. Front Cardiovasc Med 2022; 9:834553. [PMID: 35387443 PMCID: PMC8978525 DOI: 10.3389/fcvm.2022.834553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
Objectives The aim of this study was to investigate the potential prognostic value of post-percutaneous coronary intervention (PCI) angiography-derived fractional flow reserve (FFR) and its gradient across the stent. Background Post-PCI FFR and its gradient across the stent have been proved to be associated with clinical outcomes. However, little is known about the prognostic value of post-PCI coronary angiography-derived FFR and its gradient across the stent. Methods Patients diagnosed with coronary heart disease and participated in drug-eluting stent (DES) clinical trials for stent implantation in a single center were included for this retrospective analysis. A novel coronary angiography-derived FFR (caFFR) and its gradient across the stent were calculated offline using two projections from coronary angiography performed after PCI. Clinical follow-up was completed at 9 months after the index procedure and the primary outcome was target vessel failure (TVF), defined as a composite of target vessel-related myocardial infarction (MI), target vessel-related revascularization (TVR), and cardiac death. Coronary angiography was also performed at the 9 months follow-up time to get data of late lumen loss (LLL) and percent diameter stenosis (%DS). Results A total of 159 vessels in 136 patients were analyzed. The mean value of post-PCI caFFR was 0.90 ± 0.06. The median value of trans-stent caFFR gradient (ΔcaFFRstent) was 0.04 (interquartile range 0.02-0.08). ΔcaFFRstent>0 was demonstrated in 147 vessels (92.45%). The TVF rate was significantly higher in patients with post-PCI caFFR < 0.90 (4 [8.16%] vs. 1 [1.15%], P = 0.037), which was mainly achieved by the difference between the TVR rate. In the subgroup with lesions located in the left anterior descending coronary artery (LAD), post-PCI caFFR was an independent predictor of LLL (β = -1.07, 95% CI: -1.74 to -0.39, P = 0.002) and %DS at follow-up (β = -30.24, 95% CI: -56.44 to -4.04, P = 0.025), ΔcaFFRstent was an independent predictor of LLL (β=0.98, 95% CI:0.13-1.83, P = 0.026). Conclusion Suboptimal post-PCI caFFR and trans-stent caFFR gradient were common among vessels immediately after stenting. Lower post-PCI caFFR was associated with a higher rate of 9-month TVF. After LAD PCI, both post-PCI caFFR and its gradient across stent were independent predictors of the neointimal proliferation of the target vessel evaluated by LLL and %DS at follow-up.
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Affiliation(s)
- Zuoyi Zhou
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Baozhen Zhu
- Department of Cardiology, Peking University First Hospital, Beijing, China.,Department of Intervention, Tongxin People's Hospital, Tongxin, China
| | - Fangfang Fan
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Fan Yang
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Shu Fang
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Zhi Wang
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Lin Qiu
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Yanjun Gong
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Yong Huo
- Department of Cardiology, Peking University First Hospital, Beijing, China
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14
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Takahashi T, Shin D, Kuno T, Lee JM, Latib A, Fearon WF, Maehara A, Kobayashi Y. Diagnostic performance of fractional flow reserve derived from coronary angiography, intravascular ultrasound, and optical coherence tomography; a meta-analysis. J Cardiol 2022; 80:1-8. [DOI: 10.1016/j.jjcc.2022.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/06/2022] [Accepted: 02/17/2022] [Indexed: 10/18/2022]
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15
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Jiang J, Tang L, Du C, Leng X, He J, Hu Y, Dong L, Sun Y, Li C, Xiang J, Wang J. Diagnostic performance of AccuFFRangio in the functional assessment of coronary stenosis compared with pressure wire-derived fractional flow reserve. Quant Imaging Med Surg 2022; 12:949-958. [PMID: 35111596 DOI: 10.21037/qims-21-463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/26/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND Non-invasive fractional flow reserve (FFR) has been increasingly used in the clinical workflow to assist clinical decision-making for percutaneous coronary intervention (PCI). This clinical study evaluates the diagnostic accuracy of coronary stenosis assessed by a non-invasive FFR analysis method (termed AccuFFRangio) based on invasive coronary angiography (ICA). It is a blinded, self-controlled, retrospective, and dual-center clinical investigation study. METHODS Coronary angiography data and the related information of 320 patients with 320 vessels were collected, and AccuFFRangio was used to assess the FFR for these patients. Compared with the wire-measured FFR values, we evaluated AccuFFRangio performance by its accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). RESULTS The diagnostic accuracy, sensitivity, specificity, PPV, and NPV for AccuFFRangio in identifying hemodynamically significant coronary stenosis were 93.3%, 92.6%, 93.5%, 84.3%, and 97.1%, respectively. The direct correlation between computed AccuFFRangio and measured FFR was 0.812 (P<0.001), and the area under the receiver operating characteristic curve (AUC) value of AccuFFRangio was 0.96. CONCLUSIONS This clinical study demonstrates the efficiency and accuracy of AccuFFRangio for clinical implementation when using invasive wire-measured FFR as a reference. Further validation is required in a large prospective multicenter study.
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Affiliation(s)
- Jun Jiang
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lijiang Tang
- Department of Cardiology, Zhejiang Hospital, Hangzhou, China
| | - Changqing Du
- Department of Cardiology, Zhejiang Hospital, Hangzhou, China
| | | | - Jingsong He
- ArteryFlow Technology Co., Ltd., Hangzhou, China
| | - Yumeng Hu
- ArteryFlow Technology Co., Ltd., Hangzhou, China
| | - Liang Dong
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yong Sun
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Changling Li
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | | | - Jian'an Wang
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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16
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Achenbach S. Computed Tomography-Derived Fractional Flow Reserve: An Invitation to Learn More. JACC Cardiovasc Imaging 2022; 15:296-298. [PMID: 35144766 DOI: 10.1016/j.jcmg.2021.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/15/2021] [Indexed: 11/25/2022]
Affiliation(s)
- Stephan Achenbach
- Department of Cardiology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany.
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17
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Jain P, Udelson JE, Kimmelstiel C. Physiologic Guidance for Percutaneous Coronary Intervention: State of the Evidence. Trends Cardiovasc Med 2022:S1050-1738(22)00014-7. [DOI: 10.1016/j.tcm.2022.01.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/10/2022] [Accepted: 01/25/2022] [Indexed: 01/10/2023]
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18
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Peper J, Becker LM, van Kuijk JP, Leiner T, Swaans MJ. Fractional Flow Reserve: Patient Selection and Perspectives. Vasc Health Risk Manag 2021; 17:817-831. [PMID: 34934324 PMCID: PMC8684425 DOI: 10.2147/vhrm.s286916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 11/30/2021] [Indexed: 01/10/2023] Open
Abstract
The aim of this review was to discuss the current practice and patient selection for invasive FFR, new techniques to estimate invasive FFR and future of coronary physiology tests. We elaborate on the indication and application of FFR and on the contraindications and concerns in certain patient populations.
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Affiliation(s)
- Joyce Peper
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands.,Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Leonie M Becker
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands.,Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jan-Peter van Kuijk
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands
| | - Tim Leiner
- Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Martin J Swaans
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands
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19
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Skopalik S, Hall Barrientos P, Matthews J, Radjenovic A, Mark P, Roditi G, Paul MC. Image-based computational fluid dynamics for estimating pressure drop and fractional flow reserve across iliac artery stenosis: A comparison with in-vivo measurements. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2021; 37:e3437. [PMID: 33449429 DOI: 10.1002/cnm.3437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 12/07/2020] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Computational Fluid Dynamics (CFD) and time-resolved phase-contrast magnetic resonance imaging (PC-MRI) are potential non-invasive methods for the assessment of the severity of arterial stenoses. Fractional flow reserve (FFR) is the current "gold standard" for determining stenosis severity in the coronary arteries but is an invasive method requiring insertion of a pressure wire. CFD derived FFR (vFFR) is an alternative to traditional catheter derived FFR now available commercially for coronary artery assessment, however, it can potentially be applied to a wider range of vulnerable vessels such as the iliac arteries. In this study CFD simulations are used to assess the ability of vFFR in predicting the stenosis severity in a patient with a stenosis of 77% area reduction (>50% diameter reduction) in the right iliac artery. Variations of vFFR, overall pressure drop and flow split between the vessels were observed by using different boundary conditions. Correlations between boundary condition parameters and resulting flow variables are presented. The study concludes that vFFR has good potential to characterise iliac artery stenotic disease.
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Affiliation(s)
- Simeon Skopalik
- James Watt School of Engineering, University of Glasgow, Glasgow, UK
| | - Pauline Hall Barrientos
- Department of Clinical Physics and Bioengineering, Queen Elizabeth University Hospital, Glasgow, UK
| | | | | | - Patrick Mark
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, Glasgow, UK
| | - Giles Roditi
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, Glasgow, UK
| | - Manosh C Paul
- James Watt School of Engineering, University of Glasgow, Glasgow, UK
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20
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Ando J, Otani K, Redel T, Minatsuki S, Kikuchi H, Kodera S, Komuro I. Agreement between single plane and biplane derived angiographic fractional flow reserve in patients with intermediate coronary artery stenosis. Heart Vessels 2021; 37:549-554. [PMID: 34762151 DOI: 10.1007/s00380-021-01959-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 10/01/2021] [Indexed: 11/25/2022]
Abstract
Fractional flow reserve (FFR) is often used to evaluate the physiological severity of intermediate coronary stenoses, but less-invasive assessment methods are desirable. We evaluated the feasibility of angiographic FFR (angioFFR) calculated from two projections acquired simultaneously by a biplane C-arm system and angioFFR calculated from two projections acquired independently by one plane of the same biplane C-arm system. AngioFFR was validated against FFR in terms of detection of hemodynamically relevant coronary artery stenoses. Twenty-two Patients who underwent angiography and FFR for coronary artery disease were included. We used a non-commercial prototype to calculate biplane angioFFR for 22 vessels (19 LAD, 1 LCx, 2 RCA) and single plane angioFFR for 17 of the same 22 vessels. FFR < 0.8 was measured in 8 vessels. The Pearson correlation coefficients with FFR were 0.55 for single plane angioFFR and 0.61 for biplane angioFFR and the diagnostic accuracies were 88% (95% CI 73-100%) for single plane angioFFR and 86% (95% CI 72-100%) for biplane angioFFR. Bland-Altman plots revealed that compared with FFR, the limits of agreement for single plane angioFFR were - 0.07 to 0.19 (mean difference 0.06, p = 0.002) and the limits of agreement for biplane FFR were - 0.09 to 0.15 (mean difference 0.03, p = 0.03). In conclusion, angioFFR calculated from single or biplane acquisitions by a biplane C-arm is feasible and may evolve to a tool for less invasive imaging-based assessment of myocardial ischemia.
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Affiliation(s)
- Jiro Ando
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Katharina Otani
- Advanced Therapies Innovation Department, Siemens Healthcare K.K, Gate City Osaki West Tower, 1-11-1 Osaki, Shinagawa-ku, Tokyo, 114-8644, Japan
| | - Thomas Redel
- Advanced Therapies Innovation Department, Siemens Healthcare GmbH, Siemensstr. 1, 91301, Forchheim, Germany
| | - Shun Minatsuki
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hironobu Kikuchi
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Satoshi Kodera
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Issei Komuro
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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21
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Lal K, Gosling R, Ghobrial M, Williams GJ, Rammohan V, Hose DR, Lawford PV, Narracott A, Fenner J, Gunn JP, Morris PD. Operator-dependent variability of angiography-derived fractional flow reserve and the implications for treatment. EUROPEAN HEART JOURNAL. DIGITAL HEALTH 2021; 2:263-270. [PMID: 34223175 PMCID: PMC8242185 DOI: 10.1093/ehjdh/ztab012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/17/2021] [Accepted: 01/28/2021] [Indexed: 01/30/2023]
Abstract
AIMS To extend the benefits of physiologically guided percutaneous coronary intervention to many more patients, angiography-derived, or 'virtual' fractional flow reserve (vFFR) has been developed, in which FFR is computed, based upon the images, instead of being measured invasively. The effect of operator experience with these methods upon vFFR accuracy remains unknown. We investigated variability in vFFR results based upon operator experience with image-based computational modelling techniques. METHODS AND RESULTS Virtual fractional flow reserve was computed using a proprietary method (VIRTUheart) from the invasive angiograms of patients with coronary artery disease. Each case was processed by an expert (>100 vFFR cases) and a non-expert (<20 vFFR cases) operator and results were compared. The primary outcome was the variability in vFFR between experts and non-experts and the impact this had upon treatment strategy (PCI vs. conservative management). Two hundred and thirty-one vessels (199 patients) were processed. Mean non-expert and expert vFFRs were similar overall [0.76 (0.13) and 0.77 (0.16)] but there was significant variability between individual results (variability coefficient 12%, intraclass correlation coefficient 0.58), with only moderate agreement (κ = 0.46), and this led to a statistically significant change in management strategy in 27% of cases. Variability was significantly lower, and agreement higher, for expert operators; a change in their recommended management occurred in 10% of repeated expert measurements and 14% of inter-expert measurements. CONCLUSION Virtual fractional flow reserve results are influenced by operator experience of vFFR processing. This had implications for treatment allocation. These results highlight the importance of training and quality assurance to ensure reliable, repeatable vFFR results.
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Affiliation(s)
- Katherine Lal
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
| | - Rebecca Gosling
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Department of Cardiology, Sheffield Teaching Hospitals, NHS Foundation Trust, Sheffield, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Mina Ghobrial
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
| | - Gareth J Williams
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
| | - Vignesh Rammohan
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - D Rod Hose
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Patricia V Lawford
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Andrew Narracott
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - John Fenner
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Julian P Gunn
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Department of Cardiology, Sheffield Teaching Hospitals, NHS Foundation Trust, Sheffield, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Paul D Morris
- Department of Infection, Immunity and Cardiovascular Disease, Mathematical Modelling in Medicine Group, University of Sheffield, Beech Hill Road, Sheffield S102RX, UK
- Department of Cardiology, Sheffield Teaching Hospitals, NHS Foundation Trust, Sheffield, UK
- Insigneo Institute for In Silico Medicine, University of Sheffield, Sheffield, UK
- Corresponding author. Tel: +44 114 271 2863, Fax: +44 114 271 1863,
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22
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Ghobrial M, Haley HA, Gosling R, Rammohan V, Lawford PV, Hose DR, Gunn JP, Morris PD. The new role of diagnostic angiography in coronary physiological assessment. Heart 2021; 107:783-789. [PMID: 33419878 PMCID: PMC8077221 DOI: 10.1136/heartjnl-2020-318289] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 11/28/2022] Open
Abstract
The role of 'stand-alone' coronary angiography (CAG) in the management of patients with chronic coronary syndromes is the subject of debate, with arguments for its replacement with CT angiography on the one hand and its confinement to the interventional cardiac catheter laboratory on the other. Nevertheless, it remains the standard of care in most centres. Recently, computational methods have been developed in which the laws of fluid dynamics can be applied to angiographic images to yield 'virtual' (computed) measures of blood flow, such as fractional flow reserve. Together with the CAG itself, this technology can provide an 'all-in-one' anatomical and functional investigation, which is particularly useful in the case of borderline lesions. It can add to the diagnostic value of CAG by providing increased precision and reduce the need for further non-invasive and functional tests of ischaemia, at minimal cost. In this paper, we place this technology in context, with emphasis on its potential to become established in the diagnostic workup of patients with suspected coronary artery disease, particularly in the non-interventional setting. We discuss the derivation and reliability of angiographically derived fractional flow reserve (CAG-FFR) as well as its limitations and how CAG-FFR could be integrated within existing national guidance. The assessment of coronary physiology may no longer be the preserve of the interventional cardiologist.
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Affiliation(s)
- Mina Ghobrial
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
| | - Hazel Arfah Haley
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
| | - Rebecca Gosling
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
- Department of Cardiology, Sheffield Teaching Hospitals, Sheffield, UK
| | - Vignesh Rammohan
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
- Insigneo, In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Patricia V Lawford
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
- Insigneo, In Silico Medicine, University of Sheffield, Sheffield, UK
| | - D Rod Hose
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
- Insigneo, In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Julian P Gunn
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
- Department of Cardiology, Sheffield Teaching Hospitals, Sheffield, UK
- Insigneo, In Silico Medicine, University of Sheffield, Sheffield, UK
| | - Paul D Morris
- Mathematical Modellling in Medicine, Department of Infection Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield, UK
- Department of Cardiology, Sheffield Teaching Hospitals, Sheffield, UK
- Insigneo, In Silico Medicine, University of Sheffield, Sheffield, UK
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23
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Vardhan M, Gounley J, Chen SJ, Chi EC, Kahn AM, Leopold JA, Randles A. Non-invasive characterization of complex coronary lesions. Sci Rep 2021; 11:8145. [PMID: 33854076 PMCID: PMC8047040 DOI: 10.1038/s41598-021-86360-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/15/2021] [Indexed: 02/02/2023] Open
Abstract
Conventional invasive diagnostic imaging techniques do not adequately resolve complex Type B and C coronary lesions, which present unique challenges, require personalized treatment and result in worsened patient outcomes. These lesions are often excluded from large-scale non-invasive clinical trials and there does not exist a validated approach to characterize hemodynamic quantities and guide percutaneous intervention for such lesions. This work identifies key biomarkers that differentiate complex Type B and C lesions from simple Type A lesions by introducing and validating a coronary angiography-based computational fluid dynamic (CFD-CA) framework for intracoronary assessment in complex lesions at ultrahigh resolution. Among 14 patients selected in this study, 7 patients with Type B and C lesions were included in the complex lesion group including ostial, bifurcation, serial lesions and lesion where flow was supplied by collateral bed. Simple lesion group included 7 patients with lesions that were discrete, [Formula: see text] long and readily accessible. Intracoronary assessment was performed using CFD-CA framework and validated by comparing to clinically measured pressure-based index, such as FFR. Local pressure, endothelial shear stress (ESS) and velocity profiles were derived for all patients. We validates the accuracy of our CFD-CA framework and report excellent agreement with invasive measurements ([Formula: see text]). Ultra-high resolution achieved by the model enable physiological assessment in complex lesions and quantify hemodynamic metrics in all vessels up to 1mm in diameter. Importantly, we demonstrate that in contrast to traditional pressure-based metrics, there is a significant difference in the intracoronary hemodynamic forces, such as ESS, in complex lesions compared to simple lesions at both resting and hyperemic physiological states [n = 14, [Formula: see text]]. Higher ESS was observed in the complex lesion group ([Formula: see text] Pa) than in simple lesion group ([Formula: see text] Pa). Complex coronary lesions have higher ESS compared to simple lesions, such differential hemodynamic evaluation can provide much the needed insight into the increase in adverse outcomes for such patients and has incremental prognostic value over traditional pressure-based indices, such as FFR.
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Affiliation(s)
- Madhurima Vardhan
- Department of Biomedical Engineering, Duke University, Durham, NC, 27705, USA
| | - John Gounley
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - S James Chen
- Department of Medicine/Cardiology, University of Colorado AMC, Aurora, CO, 80045, USA
| | - Eric C Chi
- Department of Statistics, North Carolina State University, Raleigh, 27695, USA
| | - Andrew M Kahn
- Division of Cardiovascular Medicine, University of California San Diego, San Diego, 92103, USA
| | - Jane A Leopold
- Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Amanda Randles
- Department of Biomedical Engineering, Duke University, Durham, NC, 27705, USA.
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24
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Blanco PJ, Bulant CA, Ares GD, Lemos PA, Feijóo RA. A simple coronary blood flow model to study the collateral flow index. Biomech Model Mechanobiol 2021; 20:1365-1382. [PMID: 33772676 DOI: 10.1007/s10237-021-01449-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 03/06/2021] [Indexed: 11/25/2022]
Abstract
In this work, we present a novel modeling framework to investigate the effects of collateral circulation into the coronary blood flow physiology. A prototypical model of the coronary tree, integrated with the concept of Collateral Flow Index (CFI), is employed to gain insight about the role of model parameters associated with the collateral circuitry, which results in physically-realizable solutions for specific CFI data. Then, we discuss the mathematical feasibility of pressure-derived CFI, anatomical implications and practical considerations involving the estimation of model parameters in collateral connections. A sensitivity analysis is carried out, and the investigation of the impact of the collateral circulation on FFR values is also addressed.
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Affiliation(s)
- Pablo J Blanco
- Laboratório Nacional de Computação Científica, Av. Getúlio Vargas 333, Petrópolis, 25651-075, Brazil.
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, Petrópolis, Brazil.
| | - Carlos A Bulant
- National University of the Center and National Scientific and Technical Research Council, CONICET, Tandil, Argentina
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, Petrópolis, Brazil
| | - Gonzalo D Ares
- National University of Mar del Plata, Mar del Plata, Argentina
| | - Pedro A Lemos
- Hospital Israelita Albert Einstein., São Paulo, Brazil
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, Petrópolis, Brazil
| | - Raúl A Feijóo
- Laboratório Nacional de Computação Científica, Av. Getúlio Vargas 333, Petrópolis, 25651-075, Brazil
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, Petrópolis, Brazil
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25
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Diagnostic accuracy of quantitative flow ratio (QFR) and vessel fractional flow reserve (vFFR) estimated retrospectively by conventional radiation saving X-ray angiography. Int J Cardiovasc Imaging 2021; 37:1491-1501. [PMID: 33454897 PMCID: PMC8105229 DOI: 10.1007/s10554-020-02133-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 12/07/2020] [Indexed: 11/24/2022]
Abstract
Background Angiography derived FFR reveals good performance in assessing intermediate coronary stenosis. However, its performance under contemporary low X-ray frame and pulse rate settings is unknown. We aim to validate the feasibility and performance of quantitative flow ratio (QFR) and vessel fractional flow reserve (vFFR) under such angiograms. Methods This was an observational, retrospective, single center cohort study. 134 vessels in 102 patients, with angiograms acquired under 7.5fps and 7pps mode, were enrolled. QFR (fQFR and cQFR) and vFFR were validated with FFR as the gold standard. A conventional manual and a newly developed algorithmic exclusion method (M and A group) were both evaluated for identification of poor-quality angiograms. Results Good agreement between QFR/vFFR and FFR were observed in both M and A group, except for vFFR in the M group. The correlation coefficients between fQFR/cQFR/vFFR and FFR were 0.6242, 0.5888, 0.4089 in the M group, with rvFFR significantly lower than rfQFR (p = 0.0303), and 0.7055, 0.6793, 0.5664 in the A group, respectively. AUCs of detecting lesions with FFR ≤ 0.80 were 0.852 (95% CI 0.722–0.913), 0.858 (95% CI 0.778–0.917), 0.682 (95% CI 0.586–0.768), for fQFR/cQFR/vFFR in the M group, while vFFR performed poorer than fQFR (p = 0.0063) and cQFR (p = 0.0054). AUCs were 0.898 (95% CI 0.811–0.945), 0.892 (95% CI 0.803–0.949), 0.843 (95% CI 0.746–0.914) for fQFR/cQFR/vFFR in the A group. AUCvFFR was significantly higher in the A group than that in the M group (p = 0.0399). Conclusions QFR/vFFR assessment is feasible under 7.5fps and 7pps angiography, where cQFR showed no advantage compared to fQFR. Our newly developed algorithmic exclusion method could be a better method of selecting angiograms with adequate quality for angiography derived FFR assessment. Supplementary Information The online version contains supplementary material available at 10.1007/s10554-020-02133-8.
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26
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Haley HA, Ghobrial M, Morris PD, Gosling R, Williams G, Mills MT, Newman T, Rammohan V, Pederzani G, Lawford PV, Hose R, Gunn JP. Virtual (Computed) Fractional Flow Reserve: Future Role in Acute Coronary Syndromes. Front Cardiovasc Med 2021; 8:735008. [PMID: 34746253 PMCID: PMC8569111 DOI: 10.3389/fcvm.2021.735008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/22/2021] [Indexed: 12/17/2022] Open
Abstract
The current management of acute coronary syndromes (ACS) is with an invasive strategy to guide treatment. However, identifying the lesions which are physiologically significant can be challenging. Non-invasive imaging is generally not appropriate or timely in the acute setting, so the decision is generally based upon visual assessment of the angiogram, supplemented in a small minority by invasive pressure wire studies using fractional flow reserve (FFR) or related indices. Whilst pressure wire usage is slowly increasing, it is not feasible in many vessels, patients and situations. Limited evidence for the use of FFR in non-ST elevation (NSTE) ACS suggests a 25% change in management, compared with traditional assessment, with a shift from more to less extensive revascularisation. Virtual (computed) FFR (vFFR), which uses a 3D model of the coronary arteries constructed from the invasive angiogram, and application of the physical laws of fluid flow, has the potential to be used more widely in this situation. It is less invasive, fast and can be integrated into catheter laboratory software. For severe lesions, or mild disease, it is probably not required, but it could improve the management of moderate disease in 'real time' for patients with non-ST elevation acute coronary syndromes (NSTE-ACS), and in bystander disease in ST elevation myocardial infarction. Its practicability and impact in the acute setting need to be tested, but the underpinning science and potential benefits for rapid and streamlined decision-making are enticing.
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Affiliation(s)
- Hazel Arfah Haley
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
- Sheffield Teaching Hospitals National Health Service Foundation Trust, Sheffield, United Kingdom
| | - Mina Ghobrial
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Paul D. Morris
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
- Sheffield Teaching Hospitals National Health Service Foundation Trust, Sheffield, United Kingdom
| | - Rebecca Gosling
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Gareth Williams
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Mark T. Mills
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Sheffield Teaching Hospitals National Health Service Foundation Trust, Sheffield, United Kingdom
| | - Tom Newman
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Sheffield Teaching Hospitals National Health Service Foundation Trust, Sheffield, United Kingdom
| | - Vignesh Rammohan
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Giulia Pederzani
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Patricia V. Lawford
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Rodney Hose
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
| | - Julian P. Gunn
- Department of Infection Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Insigneo Institute for in silico Medicine, Sheffield, United Kingdom
- Sheffield Teaching Hospitals National Health Service Foundation Trust, Sheffield, United Kingdom
- *Correspondence: Julian P. Gunn
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27
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Wang H, Huang Z, Lu J. Fractional-order modeling and control of pneumatic-hydraulic upper limb rehabilitation training system1. JOURNAL OF INTELLIGENT & FUZZY SYSTEMS 2020. [DOI: 10.3233/jifs-200891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this paper, by replacing the integral mass flow equation to fractional-order mass flow equation, the fractional-order mathematical model of 2DOF pneumatic-hydraulic upper limb rehabilitation training system is established. A new 2DOF fractional-order fuzzy PID (FOFPID) controller is designed, to provides a new reference for improving the control accuracy of the pneumatic system. In the design of the controller, the weight parameters of the input terms are transformed into the weight parameters of the error, and the input, which are analyzed to improve the accuracy of the controller design. The parameters of the control system are determined by multi-objective particle swarm optimization. To prove the effectiveness of the proposed control method, the experimental research was carried out by building the experimental platform of pneumatic-hydraulic upper limb rehabilitation training system. The results show that the 2DOF FOFPID controller has better performance than other designed controllers under different working conditions.
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Affiliation(s)
- Hongyan Wang
- School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, West Hi-Tech Zone, Chengdu, China
| | - Zhi Huang
- School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, West Hi-Tech Zone, Chengdu, China
| | - Jinbo Lu
- School of Electronics and Information Engineering, Southwest Petroleum University, Chengdu, China
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28
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Babakhani H, Sadeghipour P, Tashakori Beheshti A, Ghasemi M, Moosavi J, Sadeghian M, Salesi M, Zahedmehr A, Shafe O, Shakerian F, Mohebbi B, Alemzadeh-Ansari MJ, Firouzi A, Geraiely B, Abdi S. Diagnostic accuracy of two-dimensional coronary angiographic-derived fractional flow reserve-Preliminary results. Catheter Cardiovasc Interv 2020; 97:E484-E494. [PMID: 32716124 DOI: 10.1002/ccd.29150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/01/2020] [Accepted: 07/03/2020] [Indexed: 11/05/2022]
Abstract
AIM Noninvasive fractional flow reserve (NiFFR) is an emerging method for evaluating the functional significance of a coronary lesion during diagnostic coronary angiography (CAG). The method relies on the computational flow dynamics and the three-dimensional (3D) reconstruction of the vessel extracted from CAG. In the present study, we sought to evaluate the diagnostic performance and applicability of 2D-based NiFFR. METHODS In this prospective observational study, we evaluated 2D-based NiFFR in 279 candidates for invasive CAG and invasive fractional flow reserve (FFR). NiFFR was calculated via two methods: variable NiFFR, in which the contrast transport time was extracted from the angiographic view, and fixed NiFFR, in which a prespecified frame count was applied. RESULTS The final analysis was performed on 245 patients (250 lesions). Variable NiFFR had an area under the receiver operating characteristic curve of 81.5%, an accuracy of 80.0%, a sensitivity of 82.2%, a specificity of 82.2%, a negative predictive value of 91.4%, and a positive predictive value of 63.6%. The mean difference between FFR and NiFFR was -0.0244 ±.0616 (p ≤.0001). A pressure wire-free hybrid strategy was possible in 68.8% of our population with variable NiFFR. CONCLUSIONS Our 2D-based NiFFR yielded results comparable to those derived from 3D-based software. Our findings should; however, be confirmed in larger trials.
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Affiliation(s)
- Hamid Babakhani
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran.,Energy Conversion Department, Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Parham Sadeghipour
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Tashakori Beheshti
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Massoud Ghasemi
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Jamal Moosavi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohamad Sadeghian
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Salesi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Zahedmehr
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Omid Shafe
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Farshad Shakerian
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Bahram Mohebbi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Javad Alemzadeh-Ansari
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Ata Firouzi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Babak Geraiely
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Seifollah Abdi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
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29
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Hashemi J, Rai S, Ghafghazi S, Berson RE. Blood residence time to assess significance of coronary artery stenosis. Sci Rep 2020; 10:11658. [PMID: 32669566 PMCID: PMC7363809 DOI: 10.1038/s41598-020-68292-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 06/15/2020] [Indexed: 01/09/2023] Open
Abstract
Coronary artery stenosis is a narrowing of coronary lumen space caused by an atherosclerotic lesion. Fractional flow reserve (FFR) is the gold standard metric to assess physiological significance of coronary stenosis, but requires an invasive procedure. Computational modeling in conjunction with patient-specific imaging demonstrates formation of regions of recirculatory flow distal to a stenosis, increasing mean blood residence time relative to uninhibited flow. A new computational parameter, mean blood residence time (BloodRT), was computed for 100 coronary artery segments for which FFR was known. A threshold for BloodRT was determined to assess the physiological significance of a stenosis, analogous to diagnostic threshold for FFR. Model sensitivity and specificity of BloodRT for diagnosis of hemodynamically significant coronary stenosis was 98% and 96% respectively, compared with FFR. When applied to clinical practice, this could potentially allow practicing cardiologists to accurately assess the severity of coronary stenosis without resorting to invasive techniques.
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Affiliation(s)
- Javad Hashemi
- Department of Chemical Engineering, University of Louisville, Louisville, KY, USA
| | - Shesh Rai
- Department of Bioinformatics and Biostatistics, University of Louisville, Louisville, KY, USA
| | - Shahab Ghafghazi
- Department of Medicine, University of Louisville, Louisville, KY, USA.
| | - R Eric Berson
- Department of Chemical Engineering, University of Louisville, Louisville, KY, USA.
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30
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Ciusdel C, Turcea A, Puiu A, Itu L, Calmac L, Weiss E, Margineanu C, Badila E, Berger M, Redel T, Passerini T, Gulsun M, Sharma P. Deep neural networks for ECG-free cardiac phase and end-diastolic frame detection on coronary angiographies. Comput Med Imaging Graph 2020; 84:101749. [PMID: 32623295 DOI: 10.1016/j.compmedimag.2020.101749] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/22/2020] [Accepted: 06/12/2020] [Indexed: 01/17/2023]
Abstract
Invasive coronary angiography (ICA) is the gold standard in Coronary Artery Disease (CAD) imaging. Detection of the end-diastolic frame (EDF) and, in general, cardiac phase detection on each temporal frame of a coronary angiography acquisition is of significant importance for the anatomical and non-invasive functional assessment of CAD. This task is generally performed via manual frame selection or semi-automated selection based on simultaneously acquired ECG signals - thus introducing the requirement of simultaneous ECG recordings. In this paper, we evaluate the performance of a purely image based workflow relying on deep neural networks for fully automated cardiac phase and EDF detection on coronary angiographies. A first deep neural network (DNN), trained to detect coronary arteries, is employed to preselect a subset of frames in which coronary arteries are well visible. A second DNN predicts cardiac phase labels for each frame. Only in the training and evaluation phases for the second DNN, ECG signals are used to provide ground truth labels for each angiographic frame. The networks were trained on 56,655 coronary angiographies from 6820 patients and evaluated on 20,780 coronary angiographies from 6261 patients. No exclusion criteria related to patient state (stable or acute CAD), previous interventions (PCI or CABG), or pathology were formulated. Cardiac phase detection had an accuracy of 98.8 %, a sensitivity of 99.3 % and a specificity of 97.6 % on the evaluation set. EDF prediction had a precision of 98.4 % and a recall of 97.9 %. Several sub-group analyses were performed, indicating that the cardiac phase detection performance is largely independent from acquisition angles, the heart rate of the patient, and the angiographic view (LCA / RCA). The average execution time of cardiac phase detection for one angiographic series was on average less than five seconds on a standard workstation. We conclude that the proposed image based workflow potentially obviates the need for manual frame selection and ECG acquisition, representing a relevant step towards automated CAD assessment.
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Affiliation(s)
- Costin Ciusdel
- Corporate Technology, Siemens SRL, B-dul Eroilor Nr. 3A, 500007, Brasov, Romania; Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, 5000174, Brasov, Romania
| | - Alexandru Turcea
- Corporate Technology, Siemens SRL, B-dul Eroilor Nr. 3A, 500007, Brasov, Romania
| | - Andrei Puiu
- Corporate Technology, Siemens SRL, B-dul Eroilor Nr. 3A, 500007, Brasov, Romania; Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, 5000174, Brasov, Romania
| | - Lucian Itu
- Corporate Technology, Siemens SRL, B-dul Eroilor Nr. 3A, 500007, Brasov, Romania; Automation and Information Technology, Transilvania University of Brasov, Mihai Viteazu nr. 5, 5000174, Brasov, Romania.
| | - Lucian Calmac
- Interventional Cardiology, Clinical Emergency Hospital, Calea Floreasca nr. 8, 014461, Bucharest, Romania
| | - Emma Weiss
- Internal Medicine, Clinical Emergency Hospital, Calea Floreasca nr. 8, 014461, Bucharest, Romania
| | - Cornelia Margineanu
- Internal Medicine, Clinical Emergency Hospital, Calea Floreasca nr. 8, 014461, Bucharest, Romania
| | - Elisabeta Badila
- Internal Medicine, Clinical Emergency Hospital, Calea Floreasca nr. 8, 014461, Bucharest, Romania
| | - Martin Berger
- Advanced Therapies, Siemens Healthcare GmbH, Siemensstr. 1, Bayern, 91301, Forchheim, Germany
| | - Thomas Redel
- Advanced Therapies, Siemens Healthcare GmbH, Siemensstr. 1, Bayern, 91301, Forchheim, Germany
| | - Tiziano Passerini
- Digital Services, Digital Technology & Innovation, Siemens Healthineers, 755 College Road, Princeton, 08540 NJ, USA
| | - Mehmet Gulsun
- Digital Services, Digital Technology & Innovation, Siemens Healthineers, 755 College Road, Princeton, 08540 NJ, USA
| | - Puneet Sharma
- Digital Services, Digital Technology & Innovation, Siemens Healthineers, 755 College Road, Princeton, 08540 NJ, USA
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31
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Gabara L, Hinton J, Gunn J, Morris PD, Curzen N. Coronary Physiology Derived from Invasive Angiography: Will it be a Game Changer? ACTA ACUST UNITED AC 2020; 15:e06. [PMID: 32577131 PMCID: PMC7301204 DOI: 10.15420/icr.2019.25] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 01/27/2020] [Indexed: 12/25/2022]
Abstract
There is a large body of evidence suggesting that having knowledge of the presence and extent of coronary atheroma and whether it is causing downstream myocardial ischaemia facilitates optimal diagnosis and management for patients presenting with chest pain. Despite this, the use of coronary pressure wire in routine practice is surprisingly low and routine assessment of all diseased vessels before making a bespoke management plan is rare. The advent of angiogram-derived models of physiology could change diagnostic practice completely. By offering routine assessment of the physiology of all the major epicardial coronary vessels, angiogram-derived physiology has the potential to radically modify current practice by facilitating more accurate patient-level, vessel-level, and even lesion-level decision-making. In this article, the authors review the current state of angiogram-derived physiology and speculate on its potential impact on clinical practice.
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Affiliation(s)
- Lavinia Gabara
- Coronary Research Group, University Hospital Southampton NHS Foundation Trust UK.,Faculty of Medicine, University of Southampton UK
| | - Jonathan Hinton
- Coronary Research Group, University Hospital Southampton NHS Foundation Trust UK.,Faculty of Medicine, University of Southampton UK
| | - Julian Gunn
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield UK.,Insigneo Institute of In Silico Medicine Sheffield, UK
| | - Paul D Morris
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield UK.,Insigneo Institute of In Silico Medicine Sheffield, UK
| | - Nick Curzen
- Coronary Research Group, University Hospital Southampton NHS Foundation Trust UK.,Faculty of Medicine, University of Southampton UK
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32
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Wong CCY, Yong ASC. Flash-forward: the emergence of angiography-derived fractional flow reserve in the catheter laboratory. Cardiovasc Res 2020; 116:1242-1245. [PMID: 32016381 DOI: 10.1093/cvr/cvaa015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Christopher C Y Wong
- Department of Cardiology, Concord Hospital, University of Sydney, Hospital Road, Concord, NSW 2139, Australia
| | - Andy S C Yong
- Department of Cardiology, Concord Hospital, University of Sydney, Hospital Road, Concord, NSW 2139, Australia.,Faculty of Medicine and Health Sciences, Macquarie University, Level 1, 75 Talavera Road, Macquarie Park, NSW 2113, Australia
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33
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Applying Deep Neural Networks over Homomorphic Encrypted Medical Data. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2020; 2020:3910250. [PMID: 32351612 PMCID: PMC7171620 DOI: 10.1155/2020/3910250] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 10/24/2019] [Accepted: 03/09/2020] [Indexed: 12/27/2022]
Abstract
In recent years, powered by state-of-the-art achievements in a broad range of areas, machine learning has received considerable attention from the healthcare sector. Despite their ability to provide solutions within personalized medicine, strict regulations on the confidentiality of patient health information have in many cases hindered the adoption of deep learning-based solutions in clinical workflows. To allow for the processing of sensitive health information without disclosing the underlying data, we propose a solution based on fully homomorphic encryption (FHE). The considered encryption scheme, MORE (Matrix Operation for Randomization or Encryption), enables the computations within a neural network model to be directly performed on floating point data with a relatively small computational overhead. We consider the well-known MNIST digit recognition problem to evaluate the feasibility of the proposed method and show that performance does not decrease when deep learning is applied on MORE homomorphic data. To further evaluate the suitability of the method for healthcare applications, we first train a model on encrypted data to estimate the outputs of a whole-body circulation (WBC) hemodynamic model and then provide a solution for classifying encrypted X-ray coronary angiography medical images. The findings highlight the potential of the proposed privacy-preserving deep learning methods to outperform existing approaches by providing, within a reasonable amount of time, results equivalent to those achieved by unencrypted models. Lastly, we discuss the security implications of the encryption scheme and show that while the considered cryptosystem promotes efficiency and utility at a lower security level, it is still applicable in certain practical use cases.
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Affiliation(s)
- Paul D. Morris
- Department of Infection, Immunity and Cardiovascular DiseaseUniversity of SheffieldUnited Kingdom
- Department of CardiologySheffield Teaching Hospitals NHS Foundation TrustSheffieldUnited Kingdom
- Insigneo Institute for In Silico MedicineUniversity of SheffieldUnited Kingdom
| | - Nick Curzen
- Coronary Research GroupUniversity Hospital Southampton NHS Foundation TrustSouthamptonUnited Kingdom
- Faculty of MedicineUniversity of SouthamptonUnited Kingdom
| | - Julian P. Gunn
- Department of Infection, Immunity and Cardiovascular DiseaseUniversity of SheffieldUnited Kingdom
- Department of CardiologySheffield Teaching Hospitals NHS Foundation TrustSheffieldUnited Kingdom
- Insigneo Institute for In Silico MedicineUniversity of SheffieldUnited Kingdom
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Li J, Gong Y, Wang W, Yang Q, Liu B, Lu Y, Xu Y, Huo Y, Yi T, Liu J, Li Y, Xu S, Zhao L, Ali ZA, Huo Y. Accuracy of computational pressure-fluid dynamics applied to coronary angiography to derive fractional flow reserve: FLASH FFR. Cardiovasc Res 2019; 116:1349-1356. [PMID: 31693092 DOI: 10.1093/cvr/cvz289] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/12/2019] [Accepted: 11/03/2019] [Indexed: 11/14/2022] Open
Abstract
Abstract
Aims
Conventional fractional flow reserve (FFR) is measured invasively using a coronary guidewire equipped with a pressure sensor. A non-invasive derived FFR would eliminate risk of coronary injury, minimize technical limitations, and potentially increase adoption. We aimed to evaluate the diagnostic performance of a computational pressure-flow dynamics derived FFR (caFFR), applied to coronary angiography, compared to invasive FFR.
Methods and results
The FLASH FFR study was a prospective, multicentre, single-arm study conducted at six centres in China. Eligible patients had native coronary artery target lesions with visually estimated diameter stenosis of 30–90% and diagnosis of stable or unstable angina pectoris. Using computational pressure-fluid dynamics, in conjunction with thrombolysis in myocardial infarction (TIMI) frame count, applied to coronary angiography, caFFR was measured online in real-time and compared blind to conventional invasive FFR by an independent core laboratory. The primary endpoint was the agreement between caFFR and FFR, with a pre-specified performance goal of 84%. Between June and December 2018, matched caFFR and FFR measurements were performed in 328 coronary arteries. Total operational time for caFFR was 4.54 ± 1.48 min. caFFR was highly correlated to FFR (R = 0.89, P = 0.76) with a mean bias of −0.002 ± 0.049 (95% limits of agreement −0.098 to 0.093). The diagnostic performance of caFFR vs. FFR was diagnostic accuracy 95.7%, sensitivity 90.4%, specificity 98.6%, positive predictive value 97.2%, negative predictive value 95.0%, and area under the receiver operating characteristic curve of 0.979.
Conclusions
Using wire-based FFR as the reference, caFFR has high accuracy, sensitivity, and specificity. caFFR could eliminate the need of a pressure wire, technical error and potentially increase adoption of physiological assessment of coronary artery stenosis severity.
Clinical Trial Registration
URL: http://www.chictr.org.cn Unique Identifier: ChiCTR1800019522.
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Affiliation(s)
- Jianping Li
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Yanjun Gong
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Weimin Wang
- Department of Cardiology, Peking University People’s Hospital, Beijing, China
| | - Qing Yang
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Bin Liu
- Department of Cardiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Yuan Lu
- Department of Cardiology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yawei Xu
- Department of Cardiology, Shanghai Tenth People's Hospital, Shanghai, China
| | - Yunlong Huo
- PKU-HKUST Shenzhen-Hongkong Institution, Shenzhen, China
| | - Tieci Yi
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Jian Liu
- Department of Cardiology, Peking University People’s Hospital, Beijing, China
| | - Yongle Li
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Shaopeng Xu
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Lei Zhao
- Department of Cardiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Ziad A Ali
- Clinical Trials Center, Cardiovascular Research Foundation, New York, NY, USA
- Department of Medicine, NewYork-Presbyterian Hospital/Columbia University Medical Center, New York, NY, USA
- St. Francis Hospital, Roslyn, NY, USA
| | - Yong Huo
- Department of Cardiology, Peking University First Hospital, Beijing, China
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Carson JM, Roobottom C, Alcock R, Nithiarasu P. Computational instantaneous wave-free ratio (IFR) for patient-specific coronary artery stenoses using 1D network models. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2019; 35:e3255. [PMID: 31469943 PMCID: PMC7003475 DOI: 10.1002/cnm.3255] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/22/2019] [Accepted: 08/21/2019] [Indexed: 05/05/2023]
Abstract
In this work, we estimate the diagnostic threshold of the instantaneous wave-free ratio (iFR) through the use of a one-dimensional haemodynamic framework. To this end, we first compared the computed fractional flow reserve (cFFR) predicted from a 1D computational framework with invasive clinical measurements. The framework shows excellent promise and utilises minimal patient data from a cohort of 52 patients with a total of 66 stenoses. The diagnostic accuracy of the cFFR model was 75.76%, with a sensitivity of 71.43%, a specificity of 77.78%, a positive predictive value of 60%, and a negative predictive value of 85.37%. The validated model was then used to estimate the diagnostic threshold of iFR. The model determined a quadratic relationship between cFFR and the ciFR. The iFR diagnostic threshold was determined to be 0.8910 from a receiver operating characteristic curve that is in the range of 0.89 to 0.9 that is normally reported in clinical studies.
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Affiliation(s)
- Jason M. Carson
- Zienkiewicz Centre for Computational Engineering, College of EngineeringSwansea UniversitySwanseaUK
- Data Science Building, Swansea University Medical SchoolSwansea UniversitySwanseaUK
- HDR UK Wales and Northern IrelandHealth Data Research UKLondonUK
| | - Carl Roobottom
- Derriford Hospital and Peninsula Medical SchoolPlymouth Hospitals NHS TrustPlymouthUK
| | - Robin Alcock
- Derriford Hospital and Peninsula Medical SchoolPlymouth Hospitals NHS TrustPlymouthUK
| | - Perumal Nithiarasu
- Zienkiewicz Centre for Computational Engineering, College of EngineeringSwansea UniversitySwanseaUK
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Carson JM, Pant S, Roobottom C, Alcock R, Javier Blanco P, Alberto Bulant C, Vassilevski Y, Simakov S, Gamilov T, Pryamonosov R, Liang F, Ge X, Liu Y, Nithiarasu P. Non-invasive coronary CT angiography-derived fractional flow reserve: A benchmark study comparing the diagnostic performance of four different computational methodologies. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2019; 35:e3235. [PMID: 31315158 PMCID: PMC6851543 DOI: 10.1002/cnm.3235] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 07/02/2019] [Accepted: 07/03/2019] [Indexed: 05/05/2023]
Abstract
Non-invasive coronary computed tomography (CT) angiography-derived fractional flow reserve (cFFR) is an emergent approach to determine the functional relevance of obstructive coronary lesions. Its feasibility and diagnostic performance has been reported in several studies. It is unclear if differences in sensitivity and specificity between these studies are due to study design, population, or "computational methodology." We evaluate the diagnostic performance of four different computational workflows for the prediction of cFFR using a limited data set of 10 patients, three based on reduced-order modelling and one based on a 3D rigid-wall model. The results for three of these methodologies yield similar accuracy of 6.5% to 10.5% mean absolute difference between computed and measured FFR. The main aspects of modelling which affected cFFR estimation were choice of inlet and outlet boundary conditions and estimation of flow distribution in the coronary network. One of the reduced-order models showed the lowest overall deviation from the clinical FFR measurements, indicating that reduced-order models are capable of a similar level of accuracy to a 3D model. In addition, this reduced-order model did not include a lumped pressure-drop model for a stenosis, which implies that the additional effort of isolating a stenosis and inserting a pressure-drop element in the spatial mesh may not be required for FFR estimation. The present benchmark study is the first of this kind, in which we attempt to homogenize the data required to compute FFR using mathematical models. The clinical data utilised in the cFFR workflows are made publicly available online.
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Affiliation(s)
- Jason Matthew Carson
- Zienkiewicz Centre for Computational Engineering, College of EngineeringSwansea UniversitySwanseaUK
- Data Science Building, Swansea University Medical SchoolSwansea UniversitySwanseaUK
| | - Sanjay Pant
- Zienkiewicz Centre for Computational Engineering, College of EngineeringSwansea UniversitySwanseaUK
| | - Carl Roobottom
- Derriford Hospital and Peninsula Medical SchoolPlymouth Hospitals NHS TrustPlymouthUK
| | - Robin Alcock
- Derriford Hospital and Peninsula Medical SchoolPlymouth Hospitals NHS TrustPlymouthUK
| | - Pablo Javier Blanco
- Department of Mathematical and Computational MethodsNational Laboratory for Scientific Computing, LNCC/MCTICPetrópolisBrazil
| | | | - Yuri Vassilevski
- Marchuk Institute of Numerical MathematicsRussian Academy of SciencesMoscowRussia
- Laboratory of Human PhysiologyMoscow Institute of Physics and TechnologyMoscowRussia
- Institute of Personalized Medicine, Laboratory of Mathematical Modelling in MedicineSechenov UniversityMoscowRussia
| | - Sergey Simakov
- Laboratory of Human PhysiologyMoscow Institute of Physics and TechnologyMoscowRussia
- Institute of Personalized Medicine, Laboratory of Mathematical Modelling in MedicineSechenov UniversityMoscowRussia
| | - Timur Gamilov
- Laboratory of Human PhysiologyMoscow Institute of Physics and TechnologyMoscowRussia
- Institute of Personalized Medicine, Laboratory of Mathematical Modelling in MedicineSechenov UniversityMoscowRussia
| | - Roman Pryamonosov
- Marchuk Institute of Numerical MathematicsRussian Academy of SciencesMoscowRussia
- Institute of Personalized Medicine, Laboratory of Mathematical Modelling in MedicineSechenov UniversityMoscowRussia
| | - Fuyou Liang
- Institute of Personalized Medicine, Laboratory of Mathematical Modelling in MedicineSechenov UniversityMoscowRussia
- School of Naval Architecture, Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghaiChina
| | - Xinyang Ge
- School of Naval Architecture, Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghaiChina
| | - Yue Liu
- School of Naval Architecture, Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghaiChina
| | - Perumal Nithiarasu
- Zienkiewicz Centre for Computational Engineering, College of EngineeringSwansea UniversitySwanseaUK
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Vardhan M, Gounley J, Chen SJ, Kahn AM, Leopold JA, Randles A. The importance of side branches in modeling 3D hemodynamics from angiograms for patients with coronary artery disease. Sci Rep 2019; 9:8854. [PMID: 31222111 PMCID: PMC6586809 DOI: 10.1038/s41598-019-45342-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 06/05/2019] [Indexed: 12/21/2022] Open
Abstract
Genesis of atherosclerotic lesions in the human arterial system is critically influenced by the fluid mechanics. Applying computational fluid dynamic tools based on accurate coronary physiology derived from conventional biplane angiogram data may be useful in guiding percutaneous coronary interventions. The primary objective of this study is to build and validate a computational framework for accurate personalized 3-dimensional hemodynamic simulation across the complete coronary arterial tree and demonstrate the influence of side branches on coronary hemodynamics by comparing shear stress between coronary models with and without these included. The proposed novel computational framework based on biplane angiography enables significant arterial circulation analysis. This study shows that models that take into account flow through all side branches are required for precise computation of shear stress and pressure gradient whereas models that have only a subset of side branches are inadequate for biomechanical studies as they may overestimate volumetric outflow and shear stress. This study extends the ongoing computational efforts and demonstrates that models based on accurate coronary physiology can improve overall fidelity of biomechanical studies to compute hemodynamic risk-factors.
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Affiliation(s)
- Madhurima Vardhan
- Department of Biomedical Engineering, Duke University, Durham, 27708, USA
| | - John Gounley
- Department of Biomedical Engineering, Duke University, Durham, 27708, USA
| | - S James Chen
- Department of Medicine/Cardiology, University of Colorado AMC, Aurora, 80045, USA
| | - Andrew M Kahn
- Division of Cardiovascular Medicine, University of California San Diego, San Diego, 92103, USA
| | - Jane A Leopold
- Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, 02115, USA
| | - Amanda Randles
- Department of Biomedical Engineering, Duke University, Durham, 27708, USA.
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Omori H, Witberg G, Kawase Y, Tanigaki T, Okamoto S, Hirata T, Sobue Y, Ota H, Kamiya H, Okubo M, Valzer O, Kornowski R, Matsuo H. Angiogram based fractional flow reserve in patients with dual/triple vessel coronary artery disease. Int J Cardiol 2019; 283:17-22. [PMID: 30819589 DOI: 10.1016/j.ijcard.2019.01.072] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 12/06/2018] [Accepted: 01/21/2019] [Indexed: 01/29/2023]
Abstract
OBJECTIVE To assess the performance of angiography derived Fractional Flow Reserve (FFRangio) in multivessel disease (MVD) patients undergoing angiography. BACKGROUND FFR is the reference standard for physiologic assessment of coronary stenosis and guidance of revascularization, especially in patients with MVD, yet it remains grossly underutilized. The non-wire based FFRangio performs well in non-MVD patients, but its accuracy in MVD is unknown. METHODS A prospective clinical study was conducted at Gifu Heart Centre, Japan. Patients underwent physiologic assessment of all relevant coronary lesions using wire-based FFR (wbFFR) and FFRangio. Primary outcome was diagnostic performance (sensitivity, specificity, accuracy) for FFRangio with wbFFR as reference. Other outcomes were the correlation between wbFFR/FFRangio, time required for wbFFR/FFRangio measurements, and the effect of wbFFR/FFRangio on the reclassification of coronary disease severity. RESULTS Fifty patients (118 lesions in total) were included. Mean age was 72 ± 9 years, 72% were male, 36% had triple vessel disease and the average SYNTAX score was 13. The mean measurement of wbFFR and FFRangio were 0.83 ± 0.12 and 0.81 ± 0.11, respectively. Accuracy, sensitivity and specificity for FFRangio were 92.3% (95% CI 79.1-98.4%), 92.4% (95% CI 84.3-97.2%) and 92.4% (95% CI 87.4-97.3%), respectively. Pearson's r between wbFFR and FFRangio was 0.83. FFRangio measurement was faster than wbFFR (9.6 ± 3.4 vs. 15.0 ± 8.9 min, p < 0.001). CONCLUSIONS In patients with MVD, FFRangio shows good correlation and excellent diagnostic performance compared to wbFFR, and measuring FFRangio is faster than wbFFR. These results highlight the potential clinical benefits of utilizing FFRangio among patients with MVD.
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Affiliation(s)
- H Omori
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - G Witberg
- Department of Cardiology, Rabin Medical Center, Petah-Tikva, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | - Y Kawase
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - T Tanigaki
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - S Okamoto
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - T Hirata
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - Y Sobue
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - H Ota
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - H Kamiya
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - M Okubo
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - O Valzer
- Department of Cardiology, Rabin Medical Center, Petah-Tikva, Israel; CathWorks, Kfar-Saba, Israel
| | - R Kornowski
- Department of Cardiology, Rabin Medical Center, Petah-Tikva, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - H Matsuo
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
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Blanco PJ, Bulant CA, Müller LO, Talou GDM, Bezerra CG, Lemos PA, Feijóo RA. Comparison of 1D and 3D Models for the Estimation of Fractional Flow Reserve. Sci Rep 2018; 8:17275. [PMID: 30467321 PMCID: PMC6250665 DOI: 10.1038/s41598-018-35344-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 11/01/2018] [Indexed: 02/05/2023] Open
Abstract
In this work we propose to validate the predictive capabilities of one-dimensional (1D) blood flow models with full three-dimensional (3D) models in the context of patient-specific coronary hemodynamics in hyperemic conditions. Such conditions mimic the state of coronary circulation during the acquisition of the Fractional Flow Reserve (FFR) index. Demonstrating that 1D models accurately reproduce FFR estimates obtained with 3D models has implications in the approach to computationally estimate FFR. To this end, a sample of 20 patients was employed from which 29 3D geometries of arterial trees were constructed, 9 obtained from coronary computed tomography angiography (CCTA) and 20 from intra-vascular ultrasound (IVUS). For each 3D arterial model, a 1D counterpart was generated. The same outflow and inlet pressure boundary conditions were applied to both (3D and 1D) models. In the 1D setting, pressure losses at stenoses and bifurcations were accounted for through specific lumped models. Comparisons between 1D models (FFR1D) and 3D models (FFR3D) were performed in terms of predicted FFR value. Compared to FFR3D, FFR1D resulted with a difference of 0.00 ± 0.03 and overall predictive capability AUC, Acc, Spe, Sen, PPV and NPV of 0.97, 0.98, 0.90, 0.99, 0.82, and 0.99, with an FFR threshold of 0.8. We conclude that inexpensive FFR1D simulations can be reliably used as a surrogate of demanding FFR3D computations.
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Affiliation(s)
- P J Blanco
- National Laboratory for Scientific Computing, LNCC/MCTIC, Av. Getúlio Vargas, 333, Petrópolis-RJ, 25651-075, Brazil.
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil.
| | - C A Bulant
- National Laboratory for Scientific Computing, LNCC/MCTIC, Av. Getúlio Vargas, 333, Petrópolis-RJ, 25651-075, Brazil
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil
| | - L O Müller
- National Laboratory for Scientific Computing, LNCC/MCTIC, Av. Getúlio Vargas, 333, Petrópolis-RJ, 25651-075, Brazil
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil
| | - G D Maso Talou
- National Laboratory for Scientific Computing, LNCC/MCTIC, Av. Getúlio Vargas, 333, Petrópolis-RJ, 25651-075, Brazil
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil
| | - C Guedes Bezerra
- Department of Interventional Cardiology, Heart Institute (InCor) and the University of São Paulo Medical School, Sao Paulo, SP, 05403-904, Brazil
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil
| | - P A Lemos
- Department of Interventional Cardiology, Heart Institute (InCor) and the University of São Paulo Medical School, Sao Paulo, SP, 05403-904, Brazil
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil
| | - R A Feijóo
- National Laboratory for Scientific Computing, LNCC/MCTIC, Av. Getúlio Vargas, 333, Petrópolis-RJ, 25651-075, Brazil
- INCT-MACC Instituto Nacional de Ciência e Tecnologia em Medicina Assistida por Computação Científica, Petrópolis, Brazil
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Tar B, Jenei C, Dezsi CA, Bakk S, Beres Z, Santa J, Svab M, Szentes V, Polgar P, Bujaky C, Czuriga D, Kőszegi Z. Less invasive fractional flow reserve measurement from 3-dimensional quantitative coronary angiography and classic fluid dynamic equations. EUROINTERVENTION 2018; 14:942-950. [DOI: 10.4244/eij-d-17-00859] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bezerra CG, Hideo-Kajita A, Bulant CA, Maso-Talou GD, Mariani J, Pinton FA, Falcão BAA, Esteves-Filho A, Franken M, Feijóo RA, Kalil-Filho R, Garcia-Garcia HM, Blanco PJ, Lemos PA. Coronary fractional flow reserve derived from intravascular ultrasound imaging: Validation of a new computational method of fusion between anatomy and physiology. Catheter Cardiovasc Interv 2018; 93:266-274. [PMID: 30277641 DOI: 10.1002/ccd.27822] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 07/15/2018] [Indexed: 12/26/2022]
Abstract
OBJECTIVES To evaluate the diagnostic performance of a novel computational algorithm based on three-dimensional intravascular ultrasound (IVUS) imaging in estimating fractional flow reserve (IVUSFR ), compared to gold-standard invasive measurements (FFRINVAS ). BACKGROUND IVUS provides accurate anatomical evaluation of the lumen and vessel wall and has been validated as a useful tool to guide percutaneous coronary intervention. However, IVUS poorly represents the functional status (i.e., flow-related information) of the imaged vessel. METHODS Patients with known or suspected stable coronary disease scheduled for elective cardiac catheterization underwent FFRINVAS measurement and IVUS imaging in the same procedure to evaluate intermediate lesions. A processing methodology was applied on IVUS to generate a computational mesh condensing the geometric characteristics of the vessel. Computation of IVUSFR was obtained from patient-level morphological definition of arterial districts and from territory-specific boundary conditions. FFRINVAS measurements were dichotomized at the 0.80 threshold to define hemodynamically significant lesions. RESULTS A total of 24 patients with 34 vessels were analyzed. IVUSFR significantly correlated (r = 0.79; P < 0.001) and showed good agreement with FFRINVAS , with a mean difference of -0.008 ± 0.067 (P = 0.47). IVUSFR presented an overall accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of 91%, 89%, 92%, 80%, and 96%, respectively, to detect significant stenosis. CONCLUSION The computational processing of IVUSFR is a new method that allows the evaluation of the functional significance of coronary stenosis in an accurate way, enriching the anatomical information of grayscale IVUS.
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Affiliation(s)
- Cristiano G Bezerra
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,Division of Cardiology, Sirio-Libanes Hospital, Sao Paulo, Brazil.,National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, São Paulo, Brazil
| | - Alexandre Hideo-Kajita
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, District of Columbia.,Division of Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia
| | - Carlos A Bulant
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, São Paulo, Brazil.,National Laboratory for Scientific Computing, LNCC/MCTIC, Petrópolis, Brazil
| | - Gonzalo D Maso-Talou
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, São Paulo, Brazil.,National Laboratory for Scientific Computing, LNCC/MCTIC, Petrópolis, Brazil
| | - Jose Mariani
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,Division of Cardiology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Fabio A Pinton
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,Division of Cardiology, Sirio-Libanes Hospital, Sao Paulo, Brazil
| | - Breno A A Falcão
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,Division of Cardiology, Sirio-Libanes Hospital, Sao Paulo, Brazil
| | - Antônio Esteves-Filho
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,Division of Cardiology, Sirio-Libanes Hospital, Sao Paulo, Brazil
| | - Marcelo Franken
- Division of Cardiology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Raúl A Feijóo
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, São Paulo, Brazil.,National Laboratory for Scientific Computing, LNCC/MCTIC, Petrópolis, Brazil
| | - Roberto Kalil-Filho
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,Division of Cardiology, Sirio-Libanes Hospital, Sao Paulo, Brazil
| | - Hector M Garcia-Garcia
- MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, Washington, District of Columbia.,Division of Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia
| | - Pablo J Blanco
- National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, São Paulo, Brazil.,National Laboratory for Scientific Computing, LNCC/MCTIC, Petrópolis, Brazil
| | - Pedro A Lemos
- Division of Interventional Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil.,National Institute of Science and Technology in Medicine Assisted by Scientific Computing, INCT-MACC, São Paulo, Brazil.,Division of Cardiology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
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Collet C, Onuma Y, Sonck J, Asano T, Vandeloo B, Kornowski R, Tu S, Westra J, Holm NR, Xu B, de Winter RJ, Tijssen JG, Miyazaki Y, Katagiri Y, Tenekecioglu E, Modolo R, Chichareon P, Cosyns B, Schoors D, Roosens B, Lochy S, Argacha JF, van Rosendael A, Bax J, Reiber JHC, Escaned J, De Bruyne B, Wijns W, Serruys PW. Diagnostic performance of angiography-derived fractional flow reserve: a systematic review and Bayesian meta-analysis. Eur Heart J 2018; 39:3314-3321. [DOI: 10.1093/eurheartj/ehy445] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 07/31/2018] [Indexed: 01/09/2023] Open
Affiliation(s)
- Carlos Collet
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Yoshinobu Onuma
- Cardialysis BV, Rotterdam, The Netherlands
- Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | - Jeroen Sonck
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Taku Asano
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Bert Vandeloo
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Ran Kornowski
- Cardiology Department, Rabin Medical Center, Belinson Hospital Affiliated to the “Sackler” Faculty of Medicine, Tel Aviv University, Petah Tikva, Israel
| | - Shengxian Tu
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jelmer Westra
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Niels R Holm
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Bo Xu
- Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
| | - Robbert J de Winter
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Jan G Tijssen
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | | | - Yuki Katagiri
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | | | - Rodrigo Modolo
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Ply Chichareon
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Bernard Cosyns
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Daniel Schoors
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Bram Roosens
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Stijn Lochy
- Department of Cardiology, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | | | | | - Jeroen Bax
- Department of Cardiology, Leiden University Medical Center, The Netherlands
| | - Johan H C Reiber
- Division of Image Processing (LKEB), Department of Radiology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
- Medis Medical Imaging Systems, Leiden, The Netherlands
| | - Javier Escaned
- Hospital Clinico San Carlos IDISSC and Universidad Complutense de Madrid, Madrid, Spain
| | | | - William Wijns
- The Lambe Institute for Translational Medicine and Curam, National University of Ireland, Galway, Saolta University Healthcare Group, Galway, Ireland
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Han H, Bae YG, Hwang ST, Kim HY, Park I, Kim SM, Choe Y, Moon YJ, Choi JH. Computationally simulated fractional flow reserve from coronary computed tomography angiography based on fractional myocardial mass. Int J Cardiovasc Imaging 2018; 35:185-193. [DOI: 10.1007/s10554-018-1432-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/01/2018] [Indexed: 11/28/2022]
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Collet C, Grundeken MJ, Asano T, Onuma Y, Wijns W, Serruys PW. State of the art: coronary angiography. EUROINTERVENTION 2018; 13:634-643. [PMID: 28844026 DOI: 10.4244/eij-d-17-00465] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In the early days of coronary angiography, the precise quantification of luminal narrowing was challenging. The introduction of balloon angioplasty (percutaneous transluminal coronary angioplasty [PTCA]) by Andreas Grüntzig in 1977 was perhaps the greatest incentive to the development of quantitative coronary angiography (QCA). QCA has played a crucial role in evaluating interventional techniques and assessing the results of new technologies. With the advent of drug-eluting stents (DES), QCA metrics such as late lumen loss and diameter stenosis (restenosis) proved to be instrumental in assessing new technologies. Refinements in QCA with the advent of dedicated bifurcation analysis and three-dimensional (3D) QCA have broadened the application of QCA. Beyond angiographic metrics, new developments in the field of QCA have introduced the functional component in the assessment of coronary lesions. Angiography-derived fractional flow reserve (FFR) may be a good tool for diagnosing ischaemia-producing lesions in patients with non-complex coronary artery disease. Furthermore, the incremental functional information can be used to expand the traditional late lumen loss (LLL) and restenosis concepts.
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Affiliation(s)
- Carlos Collet
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
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Usui E, Yonetsu T, Kanaji Y, Hoshino M, Yamaguchi M, Hada M, Fukuda T, Ohya H, Sumino Y, Hamaya R, Kanno Y, Murai T, Lee T, Kakuta T. Relationship between optical coherence tomography-derived morphological criteria and functional relevance as determined by fractional flow reserve. J Cardiol 2018; 71:359-366. [DOI: 10.1016/j.jjcc.2017.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 09/15/2017] [Accepted: 09/20/2017] [Indexed: 01/28/2023]
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Albaghdadi M, Jaffer FA. Wire-Free and Adenosine-Free Fractional Flow Reserve Derived From the Angiogram: A Promising Future Awaiting Outcomes Data. Circ Cardiovasc Imaging 2018; 11:e007594. [PMID: 29555837 DOI: 10.1161/circimaging.118.007594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Mazen Albaghdadi
- From the Cardiovascular Research Center and Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Farouc A Jaffer
- From the Cardiovascular Research Center and Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston.
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Boileau E, Pant S, Roobottom C, Sazonov I, Deng J, Xie X, Nithiarasu P. Estimating the accuracy of a reduced-order model for the calculation of fractional flow reserve (FFR). INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2018; 34. [PMID: 28600860 DOI: 10.1002/cnm.2908] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/06/2017] [Accepted: 06/06/2017] [Indexed: 06/07/2023]
Abstract
Image-based noninvasive fractional flow reserve (FFR) is an emergent approach to determine the functional relevance of coronary stenoses. The present work aimed to determine the feasibility of using a method based on coronary computed tomography angiography (CCTA) and reduced-order models (0D-1D) for the evaluation of coronary stenoses. The reduced-order methodology (cFFRRO ) was kept as simple as possible and did not include pressure drop or stenosis models. The geometry definition was incorporated into the physical model used to solve coronary flow and pressure. cFFRRO was assessed on a virtual cohort of 30 coronary artery stenoses in 25 vessels and compared with a standard approach based on 3D computational fluid dynamics (cFFR3D ). In this proof-of-concept study, we sought to investigate the influence of geometry and boundary conditions on the agreement between both methods. Performance on a per-vessel level showed a good correlation between both methods (Pearson's product-moment R=0.885, P<0.01), when using cFFR3D as the reference standard. The 95% limits of agreement were -0.116 and 0.08, and the mean bias was -0.018 (SD =0.05). Our results suggest no appreciable difference between cFFRRO and cFFR3D with respect to lesion length and/or aspect ratio. At a fixed aspect ratio, however, stenosis severity and shape appeared to be the most critical factors accounting for differences in both methods. Despite the assumptions inherent to the 1D formulation, asymmetry did not seem to affect the agreement. The choice of boundary conditions is critical in obtaining a functionally significant drop in pressure. Our initial data suggest that this approach may be part of a broader risk assessment strategy aimed at increasing the diagnostic yield of cardiac catheterisation for in-hospital evaluation of haemodynamically significant stenoses.
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Affiliation(s)
- Etienne Boileau
- Zienkiewicz Centre for Computational Engineering, Engineering Central, College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Sanjay Pant
- Zienkiewicz Centre for Computational Engineering, Engineering Central, College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Carl Roobottom
- Derriford Hospital and Peninsula Medical School, Plymouth Hospitals NHS Trust, Derriford Rd, Crownhill, Plymouth, PL6 8DH,, UK
| | - Igor Sazonov
- Zienkiewicz Centre for Computational Engineering, Engineering Central, College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Jingjing Deng
- Department of Computer Science, Swansea University, Swansea, SA2 8PP, UK
| | - Xianghua Xie
- Department of Computer Science, Swansea University, Swansea, SA2 8PP, UK
| | - Perumal Nithiarasu
- Zienkiewicz Centre for Computational Engineering, Engineering Central, College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, UK
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Papafaklis MI, Mavrogiannis MC, Siogkas PK, Lakkas LS, Katsouras CS, Fotiadis DI, Michalis LK. Functional assessment of lesion severity without using the pressure wire: coronary imaging and blood flow simulation. Expert Rev Cardiovasc Ther 2017; 15:863-877. [PMID: 28902523 DOI: 10.1080/14779072.2017.1379899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Michail I. Papafaklis
- Second Department of Cardiology, University Hospital of Ioannina, Ioannina, Greece
- Michailideion Cardiac Center, Medical School, University of Ioannina, Ioannina, Greece
| | | | - Panagiotis K. Siogkas
- Unit of Medical Technology and Intelligent Information Systems, Department of Materials Science, University of Ioannina, Ioannina, Greece
| | - Lampros S. Lakkas
- Second Department of Cardiology, University Hospital of Ioannina, Ioannina, Greece
| | | | - Dimitrios I. Fotiadis
- Michailideion Cardiac Center, Medical School, University of Ioannina, Ioannina, Greece
- Unit of Medical Technology and Intelligent Information Systems, Department of Materials Science, University of Ioannina, Ioannina, Greece
| | - Lampros K. Michalis
- Second Department of Cardiology, University Hospital of Ioannina, Ioannina, Greece
- Michailideion Cardiac Center, Medical School, University of Ioannina, Ioannina, Greece
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Xu B, Tu S, Qiao S, Qu X, Chen Y, Yang J, Guo L, Sun Z, Li Z, Tian F, Fang W, Chen J, Li W, Guan C, Holm NR, Wijns W, Hu S. Diagnostic Accuracy of Angiography-Based Quantitative Flow Ratio Measurements for Online Assessment of Coronary Stenosis. J Am Coll Cardiol 2017; 70:3077-3087. [PMID: 29101020 DOI: 10.1016/j.jacc.2017.10.035] [Citation(s) in RCA: 316] [Impact Index Per Article: 45.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND Quantitative flow ratio (QFR) is a novel angiography-based method for deriving fractional flow reserve (FFR) without pressure wire or induction of hyperemia. The accuracy of QFR when assessed online in the catheterization laboratory has not been adequately examined to date. OBJECTIVES The goal of this study was to assess the diagnostic performance of QFR for the diagnosis of hemodynamically significant coronary stenosis defined by FFR ≤0.80. METHODS This prospective, multicenter trial enrolled patients who had at least 1 lesion with a diameter stenosis of 30% to 90% and a reference diameter ≥2 mm according to visual estimation. QFR, quantitative coronary angiography (QCA), and wire-based FFR were assessed online in blinded fashion during coronary angiography and re-analyzed offline at an independent core laboratory. The primary endpoint was that QFR would improve the diagnostic accuracy of coronary angiography such that the lower boundary of the 2-sided 95% confidence interval (CI) of this estimate exceeded 75%. RESULTS Between June and July 2017, a total of 308 patients were consecutively enrolled at 5 centers. Online QFR and FFR results were both obtained in 328 of 332 interrogated vessels. Patient- and vessel-level diagnostic accuracy of QFR was 92.4% (95% CI: 88.9% to 95.1%) and 92.7% (95% CI: 89.3% to 95.3%), respectively, both of which were significantly higher than the pre-specified target value (p < 0.001). Sensitivity and specificity in identifying hemodynamically significant stenosis were significantly higher for QFR than for QCA (sensitivity: 94.6% vs. 62.5%; difference: 32.0% [p < 0.001]; specificity: 91.7% vs. 58.1%; difference: 36.1% [p < 0.001]). Positive predictive value, negative predictive value, positive likelihood ratio, and negative likelihood ratio for QFR were 85.5%, 97.1%, 11.4, and 0.06. Offline analysis also revealed that vessel-level QFR had a high diagnostic accuracy of 93.3% (95% CI: 90.0% to 95.7%). CONCLUSIONS The study met its prespecified primary performance goal for the level of diagnostic accuracy of QFR in identifying hemodynamically significant coronary stenosis. (The FAVOR [Functional Diagnostic Accuracy of Quantitative Flow Ratio in Online Assessment of Coronary Stenosis] II China study]; NCT03191708).
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Affiliation(s)
- Bo Xu
- Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
| | - Shengxian Tu
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
| | - Shubin Qiao
- Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
| | - Xinkai Qu
- Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yundai Chen
- Chinese PLA General Hospital, Beijing, China
| | | | - Lijun Guo
- Peking University Third Hospital, Beijing, China
| | - Zhongwei Sun
- Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
| | - Zehang Li
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Feng Tian
- Chinese PLA General Hospital, Beijing, China
| | - Weiyi Fang
- Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jiyan Chen
- Guangdong General Hospital, Guangzhou, China
| | - Wei Li
- Medical Research and Biometrics Center, National Center for Cardiovascular Diseases, Beijing, China
| | - Changdong Guan
- Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
| | | | - William Wijns
- The Lambe Institute for Translational Medicine and Curam, National University of Ireland, Galway, and Saolta University Healthcare Group, Galway, Ireland
| | - Shengshou Hu
- Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China.
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