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Aramendía-Vidaurreta V, Solís-Barquero SM, Vidorreta M, Ezponda A, Echeverria-Chasco R, Bastarrika G, Fernández-Seara MA. Comparison of Myocardial Blood Flow Quantification Models for Double ECG Gating Arterial Spin Labeling MRI: Reproducibility Assessment. J Magn Reson Imaging 2024. [PMID: 38206090 DOI: 10.1002/jmri.29220] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 12/20/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
BACKGROUND Arterial spin labeling (ASL) allows non-invasive quantification of myocardial blood flow (MBF). Double-ECG gating (DG) ASL is more robust to heart rate variability than single-ECG gating (SG), but its reproducibility requires further investigation. Moreover, the existence of multiple quantification models hinders its application. Frequency-offset-corrected-inversion (FOCI) pulses provide sharper edge profiles than hyperbolic-secant (HS), which could benefit myocardial ASL. PURPOSE To assess the performance of MBF quantification models for DG compared to SG ASL, to evaluate their reproducibility and to compare the effects of HS and FOCI pulses. STUDY TYPE Prospective. SUBJECTS Sixteen subjects (27 ± 8 years). FIELD STRENGTH/SEQUENCE 1.5 T/DG and SG flow-sensitive alternating inversion recovery ASL. ASSESSMENT Three models for DG MBF quantification were compared using Monte Carlo simulations and in vivo experiments. Two models used a fitting approach (one using only a single label and control image pair per fit, the other using all available image pairs), while the third model used a T1 correction approach. Slice profile simulations were conducted for HS and FOCI pulses with varying B0 and B1. Temporal signal-to-noise ratio (tSNR) was computed for different acquisition/quantification strategies and inversion pulses. The number of images that minimized MBF error was investigated in the model with highest tSNR. Intra and intersession reproducibility were assessed in 10 subjects. STATISTICAL TESTS Within-subject coefficient of variation, analysis of variance. P-value <0.05 was considered significant. RESULTS MBF was not different across acquisition/quantification strategies (P = 0.27) nor pulses (P = 0.9). DG MBF quantification models exhibited significantly higher tSNR and superior reproducibility, particularly for the fitting model using multiple images (tSNR was 3.46 ± 2.18 in vivo and 3.32 ± 1.16 in simulations, respectively; wsCV = 16%). Reducing the number of ASL pairs to 13/15 did not increase MBF error (minimum = 0.22 mL/g/min). DATA CONCLUSION Reproducibility of MBF was better for DG than SG acquisitions, especially when employing a fitting model. LEVEL OF EVIDENCE 2 TECHNICAL EFFICACY: Stage 1.
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Affiliation(s)
- Verónica Aramendía-Vidaurreta
- Department of Radiology, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Sergio M Solís-Barquero
- Department of Radiology, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | | | - Ana Ezponda
- Department of Radiology, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Rebeca Echeverria-Chasco
- Department of Radiology, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Gorka Bastarrika
- Department of Radiology, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - María A Fernández-Seara
- Department of Radiology, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
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Huang Q, Tian Y, Mendes J, Ranjan R, Adluru G, DiBella E. Quantitative myocardial perfusion with a hybrid 2D simultaneous multi-slice sequence. Magn Reson Imaging 2023; 98:7-16. [PMID: 36563888 PMCID: PMC10474933 DOI: 10.1016/j.mri.2022.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE To evaluate a novel 2D simultaneous multi-slice (SMS) myocardial perfusion acquisition and compare directly to a published quantitative 3D stack-of-stars (SoS) acquisition. METHODS A hybrid saturation recovery radial 2D SMS sequence following a single saturation was created for the quantification of myocardial blood flow (MBF). This sequence acquired three slices simultaneously and generated an arterial input function (AIF) using the first 24 rays. Validation was done in a novel way by alternating heartbeats between the hybrid 2D SMS and the 3D SoS acquisitions. Initial studies were done to study the effects of using only every other beat for the 2D SMS in two subjects, and for the 3D SoS in four subjects. The proposed alternating acquisitions were then performed in ten dog studies at rest, four dog studies at adenosine stress, and two human resting studies. Quantitative MBF analysis was performed for 2D SMS and 3D SoS separately, using a compartment model. RESULTS Acquiring every-other-beat data resulted in 6 ± 5% ("ideal") and 11 ± 8% ("practical") perfusion changes for both 2D SMS and 3D SoS methods. For alternating acquisitions, 2D SMS and 3D SoS quantitative perfusion values were comparable for both the twelve rest studies (2D SMS: 0.69 ± 0.16 vs 3D: 0.69 ± 0.15 ml/g/min, p = 0.55) and the four stress studies (2D SMS: 1.28 ± 0.22 vs 3D: 1.30 ± 0.24 ml/g/min, p = 0.61). CONCLUSION Every-other-beat acquisition changed estimated perfusion values relatively little for both sequences. The quantitative hybrid radial 2D SMS myocardial first-pass perfusion imaging sequence gave results similar to 3D perfusion when compared directly with an alternating beat acquisition.
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Affiliation(s)
- Qi Huang
- Utah Center for Advanced Imaging Research (UCAIR), Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
| | - Ye Tian
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, USA
| | - Jason Mendes
- Utah Center for Advanced Imaging Research (UCAIR), Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA
| | - Ravi Ranjan
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
| | - Ganesh Adluru
- Utah Center for Advanced Imaging Research (UCAIR), Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
| | - Edward DiBella
- Utah Center for Advanced Imaging Research (UCAIR), Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
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Servito M, Gill I, Durbin J, Ghasemlou N, Popov AF, Stephen CD, El-Diasty M. Management of Coronary Artery Disease in CADASIL Patients: Review of Current Literature. Medicina (B Aires) 2023; 59:medicina59030586. [PMID: 36984587 PMCID: PMC10059795 DOI: 10.3390/medicina59030586] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/27/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is the most common heritable form of vascular dementia in adults. It is well-established that CADASIL results in neurocognitive dysfunction and mood disturbance. There is also cumulative evidence that CADASIL patients are more susceptible to ischemic heart disease. The aim of this study is to review the current literature regarding the incidence of coronary artery disease in CADASIL patients with a focus on the various management options and the clinical challenges associated with each of these treatment strategies. We conducted a literature search using Cochrane, MEDLINE, and EMBASE for papers that reported the occurrence of coronary artery disease in patients with CADASIL. We supplemented the search with a manual search in Google Scholar. Only case reports, case series, and original articles were included. The search resulted in six reports indicating the association between coronary artery disease and CADASIL and its management. Evidence suggests that extracranial manifestations of CADASIL may include coronary artery disease, presenting as a more extensive burden of disease in younger patients. Surgical and percutaneous revascularization strategies are feasible, but the incidence of peri-procedural stroke remains significant and should be weighed against the potential benefit derived from either of these strategies. A multidisciplinary approach to therapy, with perspectives from neurologists, cardiologists, and cardiac surgeons, is needed to provide the appropriate treatment to the CADASIL patient with severe coronary artery disease. Future studies should be directed toward the development of targeted therapies that may help with the early detection and prevention of disease progress in these patients.
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Affiliation(s)
- Maria Servito
- Department of Cardiac Surgery, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Isha Gill
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, ON K7L 2V7, Canada
| | - Joshua Durbin
- Division of Cardiology, Department of Medicine, Queen’s University, Kingston, ON K7L 2V7, Canada
| | - Nader Ghasemlou
- Department of Anaesthesiology, Queen’s University, Kingston, ON K7L 2V7, Canada
| | - Aron-Frederik Popov
- Department of Cardiothoracic Surgery, Helios Clinic, 53721 Siegburg, Germany
- Correspondence:
| | - Christopher D. Stephen
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Mohammad El-Diasty
- Division of Cardiac Surgery, Department of Surgery, Queen’s University, Kingston, ON K7L 2V7, Canada
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Leo I, Nakou E, Artico J, Androulakis E, Wong J, Moon JC, Indolfi C, Bucciarelli-Ducci C. Strengths and weaknesses of alternative noninvasive imaging approaches for microvascular ischemia. J Nucl Cardiol 2023; 30:227-238. [PMID: 35918590 DOI: 10.1007/s12350-022-03066-6] [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: 04/03/2022] [Accepted: 06/19/2022] [Indexed: 11/26/2022]
Abstract
Structural and functional abnormalities of coronary microvasculature are highly prevalent in several clinical settings and often associated with worse clinical outcomes. Therefore, there is a growing interest in the detection and treatment of this, often overlooked, disease. Coronary angiography allows the assessment of the Coronary flow reserve (CFR) and the index of microcirculatory resistance (IMR). However, the measurement of these parameters is not always feasible because of limited technical availability and the need for a cardiac catheterization with a small but real risk of potential complications. Recent advances in non-invasive imaging techniques allow the assessment of coronary microvascular function with good accuracy and reproducibility. The objective of this review is to discuss the strengths and weaknesses of alternative non-invasive approaches used in the diagnosis of coronary microvascular dysfunction (CMD), highlighting the most recent advances for each imaging modality.
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Affiliation(s)
- Isabella Leo
- Royal Brompton and Harefield Hospitals, Guys's and St Thomas' NHS Foundation Trust, London, UK
- Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Eleni Nakou
- Royal Brompton and Harefield Hospitals, Guys's and St Thomas' NHS Foundation Trust, London, UK
| | - Jessica Artico
- Institute of Cardiovascular Science, University College London, Gower Street, London, UK
- St Bartholomew's Hospital, Barts Heart Centre, West Smithfield, London, UK
| | - Emmanouil Androulakis
- Royal Brompton and Harefield Hospitals, Guys's and St Thomas' NHS Foundation Trust, London, UK
| | - Joyce Wong
- Royal Brompton and Harefield Hospitals, Guys's and St Thomas' NHS Foundation Trust, London, UK
| | - James C Moon
- Institute of Cardiovascular Science, University College London, Gower Street, London, UK
- St Bartholomew's Hospital, Barts Heart Centre, West Smithfield, London, UK
| | - Ciro Indolfi
- Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
- Mediterranea Cardiocentro, Naples, Italy
| | - Chiara Bucciarelli-Ducci
- Royal Brompton and Harefield Hospitals, Guys's and St Thomas' NHS Foundation Trust, London, UK.
- Faculty of Life Sciences and Medicine, School of Biomedical Engineering and Imaging Sciences, King's College University, London, UK.
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He B, Chen Y, Wang L, Yang Y, Xia C, Zheng J, Gao F. Compact MR-compatible ergometer and its application in cardiac MR under exercise stress: A preliminary study. Magn Reson Med 2022; 88:1927-1936. [PMID: 35649186 PMCID: PMC9545047 DOI: 10.1002/mrm.29311] [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: 12/17/2021] [Revised: 04/29/2022] [Accepted: 05/02/2022] [Indexed: 02/05/2023]
Abstract
Purpose To develop a compact MR‐compatible ergometer for exercise stress and to initially evaluate the reproducibility of myocardial native T1 and myocardial blood flow (MBF) measurements during exercise stress performed on this ergometer. Methods The compact ergometer consists of exercise, workload, and data processing components. The exercise stress can be achieved by pedaling on a pair of cylinders at a predefined frequency with adjustable resistances. Ten healthy subjects were recruited to perform cardiac MRI scans twice in a 3.0T MR scanner, at different days to assess reproducibility. Myocardial native T1 and MBF were acquired at rest and during a moderate exercise. The reproducibility of the two tests was determined by the intra‐group correlation coefficient (ICC) and coefficient of variation (CoV). Results The mean exercise intensity in this pilot study was 45 Watts (W), with an exercise duration of 5 min. Stress induced a significant increase in systolic blood pressure (from 113 ± 11 mmHg to 141 ± 12, P < 0.05) and maximal increase in heart rate by 74 ± 19%. The rate pressure product increased two‐fold (P < 0.001). Excellent reproducibility was demonstrated in native T1 during the exercise (CoV = 3.0%), whereas the reproducibility of MBF and myocardial perfusion reserve during the exercise was also good (CoV = 10.7% and 8.8%, respectively). Conclusion This pilot study demonstrated that it is possible to acquire reproducible measurements of myocardial native T1 and MBF during the exercise stress in healthy volunteers using our new compact ergometer. Click here for author‐reader discussions
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Affiliation(s)
- Bo He
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China.,Molecular Imaging Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Yushu Chen
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Lei Wang
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China.,Molecular Imaging Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Yang Yang
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Chunchao Xia
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University in St Louis, St. Louis, Missouri, USA
| | - Fabao Gao
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China.,Molecular Imaging Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
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Sabe SA, Feng J, Sellke FW, Abid MR. Mechanisms and clinical implications of endothelium-dependent vasomotor dysfunction in coronary microvasculature. Am J Physiol Heart Circ Physiol 2022; 322:H819-H841. [PMID: 35333122 PMCID: PMC9018047 DOI: 10.1152/ajpheart.00603.2021] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 03/21/2022] [Accepted: 03/21/2022] [Indexed: 12/16/2022]
Abstract
Coronary microvascular disease (CMD), which affects the arterioles and capillary endothelium that regulate myocardial perfusion, is an increasingly recognized source of morbidity and mortality, particularly in the setting of metabolic syndrome. The coronary endothelium plays a pivotal role in maintaining homeostasis, though factors such as diabetes, hypertension, hyperlipidemia, and obesity can contribute to endothelial injury and consequently arteriolar vasomotor dysfunction. These disturbances in the coronary microvasculature clinically manifest as diminished coronary flow reserve, which is a known independent risk factor for cardiac death, even in the absence of macrovascular atherosclerotic disease. Therefore, a growing body of literature has examined the molecular mechanisms by which coronary microvascular injury occurs at the level of the endothelium and the consequences on arteriolar vasomotor responses. This review will begin with an overview of normal coronary microvascular physiology, modalities of measuring coronary microvascular function, and clinical implications of CMD. These introductory topics will be followed by a discussion of recent advances in the understanding of the mechanisms by which inflammation, oxidative stress, insulin resistance, hyperlipidemia, hypertension, shear stress, endothelial cell senescence, and tissue ischemia dysregulate coronary endothelial homeostasis and arteriolar vasomotor function.
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Affiliation(s)
- Sharif A Sabe
- Cardiovascular Research Center, Rhode Island Hospital, Providence, Rhode Island
- Division of Cardiothoracic Surgery, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
| | - Jun Feng
- Cardiovascular Research Center, Rhode Island Hospital, Providence, Rhode Island
- Division of Cardiothoracic Surgery, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
| | - Frank W Sellke
- Cardiovascular Research Center, Rhode Island Hospital, Providence, Rhode Island
- Division of Cardiothoracic Surgery, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
| | - M Ruhul Abid
- Cardiovascular Research Center, Rhode Island Hospital, Providence, Rhode Island
- Division of Cardiothoracic Surgery, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
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Aleksandric S, Banovic M, Beleslin B. Challenges in Diagnosis and Functional Assessment of Coronary Artery Disease in Patients With Severe Aortic Stenosis. Front Cardiovasc Med 2022; 9:849032. [PMID: 35360024 PMCID: PMC8961810 DOI: 10.3389/fcvm.2022.849032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/16/2022] [Indexed: 01/10/2023] Open
Abstract
More than half of patients with severe aortic stenosis (AS) over 70 years old have coronary artery disease (CAD). Exertional angina is often present in AS-patients, even in the absence of significant CAD, as a result of oxygen supply/demand mismatch and exercise-induced myocardial ischemia. Moreover, persistent myocardial ischemia leads to extensive myocardial fibrosis and subsequent coronary microvascular dysfunction (CMD) which is defined as reduced coronary vasodilatory capacity below ischemic threshold. Therefore, angina, as well as noninvasive stress tests, have a low specificity and positive predictive value (PPV) for the assessment of epicardial coronary stenosis severity in AS-patients. Moreover, in symptomatic patients with severe AS exercise testing is even contraindicated. Given the limitations of noninvasive stress tests, coronary angiography remains the standard examination for determining the presence and severity of CAD in AS-patients, although angiography alone has poor accuracy in the evaluation of its functional severity. To overcome this limitation, the well-established invasive indices for the assessment of coronary stenosis severity, such as fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR), are now in focus, especially in the contemporary era with the rapid increment of transcatheter aortic valve replacement (TAVR) for the treatment of AS-patients. TAVR induces an immediate decrease in hyperemic microcirculatory resistance and a concomitant increase in hyperemic flow velocity, whereas resting coronary hemodynamics remain unaltered. These findings suggest that FFR may underestimate coronary stenosis severity in AS-patients, whereas iFR as the non-hyperemic index is independent of the AS severity. However, because resting coronary hemodynamics do not improve immediately after TAVR, the coronary vasodilatory capacity in AS-patients treated by TAVR remain impaired, and thus the iFR may overestimate coronary stenosis severity in these patients. The optimal method for evaluating myocardial ischemia in patients with AS and co-existing CAD has not yet been fully established, and this important issue is under further investigation. This review is focused on challenges, limitations, and future perspectives in the functional assessment of coronary stenosis severity in these patients, bearing in mind the complexity of coronary physiology in the presence of this valvular heart disease.
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Affiliation(s)
- Srdjan Aleksandric
- Cardiology Clinic, University Clinical Center of Serbia, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- *Correspondence: Srdjan Aleksandric
| | - Marko Banovic
- Cardiology Clinic, University Clinical Center of Serbia, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Branko Beleslin
- Cardiology Clinic, University Clinical Center of Serbia, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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Takahashi J, Shimokawa H, Yasuda S. Usefulness of hybrid assessment for coronary functional abnormalities by non-invasive and invasive techniques. Int J Cardiol 2021; 345:24-25. [PMID: 34687801 DOI: 10.1016/j.ijcard.2021.10.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022]
Affiliation(s)
- Jun Takahashi
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Hiroaki Shimokawa
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Satoshi Yasuda
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
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Del Buono MG, Montone RA, Camilli M, Carbone S, Narula J, Lavie CJ, Niccoli G, Crea F. Coronary Microvascular Dysfunction Across the Spectrum of Cardiovascular Diseases: JACC State-of-the-Art Review. J Am Coll Cardiol 2021; 78:1352-1371. [PMID: 34556322 PMCID: PMC8528638 DOI: 10.1016/j.jacc.2021.07.042] [Citation(s) in RCA: 203] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/08/2021] [Accepted: 07/19/2021] [Indexed: 12/12/2022]
Abstract
Coronary microvascular dysfunction (CMD) encompasses several pathogenetic mechanisms involving coronary microcirculation and plays a major role in determining myocardial ischemia in patients with angina without obstructive coronary artery disease, as well as in several other conditions, including obstructive coronary artery disease, nonischemic cardiomyopathies, takotsubo syndrome, and heart failure, especially the phenotype associated with preserved ejection fraction. Unfortunately, despite the identified pathophysiological and prognostic role of CMD in several conditions, to date, there is no specific treatment for CMD. Due to the emerging role of CMD as common denominator in different clinical phenotypes, additional research in this area is warranted to provide personalized treatments in this "garden variety" of patients. The purpose of this review is to describe the pathophysiological mechanisms of CMD and its mechanistic and prognostic role across different cardiovascular diseases. We will also discuss diagnostic modalities and the potential therapeutic strategies resulting from recent clinical studies.
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Affiliation(s)
- Marco Giuseppe Del Buono
- Department of Cardiovascular and Pulmonary Sciences, Catholic University of the Sacred Heart, Rome, Italy. https://twitter.com/marcodelbuono3
| | - Rocco A Montone
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.
| | - Massimiliano Camilli
- Department of Cardiovascular and Pulmonary Sciences, Catholic University of the Sacred Heart, Rome, Italy
| | - Salvatore Carbone
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, Virginia, USA; VCU Pauley Heart Center, Division of Cardiology, Department of Internal Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Jagat Narula
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Carl J Lavie
- Department of Cardiovascular Diseases, Ochsner Clinical School, New Orleans, Louisiana, USA
| | | | - Filippo Crea
- Department of Cardiovascular and Pulmonary Sciences, Catholic University of the Sacred Heart, Rome, Italy; Department of Cardiovascular Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
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Kero T, Johansson E, Engström M, Eggers KM, Johansson L, Ahlström H, Lubberink M. Evaluation of quantitative CMR perfusion imaging by comparison with simultaneous 15O-water-PET. J Nucl Cardiol 2021; 28:1252-1266. [PMID: 31313066 PMCID: PMC8421320 DOI: 10.1007/s12350-019-01810-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/28/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND We assessed the quantitative accuracy of cardiac perfusion measurements using dynamic contrast-enhanced MRI with simultaneous 15O-water PET as reference with a fully integrated PET-MR scanner. METHODS 15 patients underwent simultaneous DCE MRI and 15O-water PET scans at rest and adenosine-stress on an integrated PET-MR scanner. Correlation and agreement between MRI- and PET-based global and regional MBF values were assessed using correlation and Bland-Altman analysis. RESULTS Three subjects were excluded due to technical problems. Global mean (± SD) MBF values at rest and stress were 0.97 ± 0.27 and 3.19 ± 0.70 mL/g/min for MRI and 1.02 ± 0.28 and 3.13 ± 1.16 mL/g/min for PET (P = 0.66 and P = 0.81). The correlations between global and regional MRI- and PET-based MBF values were strong (r = 0.86 and r = 0.75). The biases were negligible for both global and regional MBF comparisons (0.01 and 0.00 mL/min/g for both), but the limits of agreement were wide for both global and regional MBF, with larger variability for high MBF-values. CONCLUSION The correlation between simultaneous MBF measurements with DCE MRI and 15O-water PET measured in an integrated PET-MRI was strong but the agreement was only moderate indicating that MRI-based quantitative MBF measurements is not ready for clinical introduction.
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Affiliation(s)
- Tanja Kero
- Medical Imaging Centre, Uppsala University Hospital, 75185, Uppsala, Sweden.
- Department of Surgical Sciences/Radiology, Uppsala University, Uppsala, Sweden.
| | | | | | - Kai M Eggers
- Department of Cardiology, Uppsala University Hospital, Uppsala, Sweden
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | | | - Håkan Ahlström
- Medical Imaging Centre, Uppsala University Hospital, 75185, Uppsala, Sweden
- Department of Surgical Sciences/Radiology, Uppsala University, Uppsala, Sweden
- Antaros Medical, BioVenture Hub, Mölndal, Sweden
| | - Mark Lubberink
- Medical Physics, Uppsala University Hospital, Uppsala, Sweden
- Department of Surgical Sciences/Radiology, Uppsala University, Uppsala, Sweden
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Bechsgaard DF, Prescott E. Coronary Microvascular Dysfunction: A Practical Approach to Diagnosis and Management. Curr Atheroscler Rep 2021; 23:54. [PMID: 34268637 DOI: 10.1007/s11883-021-00947-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to provide an overview of diagnostic and treatment considerations in patients with coronary microvascular dysfunction (CMD) in the absence of obstructive coronary artery disease (CAD). RECENT FINDINGS The prevalence of obstructive CAD in unselected patient populations referred for evaluation of angina is less than 10%. A significant proportion of patients with angina and no obstructive CAD have CMD, a condition associated with impaired cardiovascular prognosis. Non-invasive and invasive evaluation of coronary microvascular function is feasible and widely available, yet CMD is underdiagnosed and undertreated. A patient-tailored treatment approach guided by coronary microvascular testing shows promising results for patient-reported outcomes of symptom burden and quality of life. Coronary microvascular testing should be considered in angina patients with no obstructive CAD, before other causes of chest pain are explored. A patient-tailored treatment approach guided by a complete evaluation of epicardial anatomy and macro-and microvascular function may help optimize treatment strategy and prevent unnecessary medical interventions. More research is needed to establish the long-term effect of patient-tailored therapies on risk reduction in CMD.
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Affiliation(s)
- Daria Frestad Bechsgaard
- Department of Cardiology, North Zealand University Hospital, University of Copenhagen, Dyrehavevej 29, 3400, Hillerød, Denmark.
| | - Eva Prescott
- Department of Cardiology, Bispebjerg University Hospital, University of Copenhagen, Bispebjerg Bakke 23, 2400, Copenhagen, Denmark
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Coronary Microvascular Dysfunction: PET, CMR and CT Assessment. J Clin Med 2021; 10:jcm10091848. [PMID: 33922841 PMCID: PMC8123021 DOI: 10.3390/jcm10091848] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/16/2021] [Accepted: 04/21/2021] [Indexed: 01/05/2023] Open
Abstract
Microvascular dysfunction is responsible for chest pain in various kinds of patients, including those with obstructive coronary artery disease and persistent symptoms despite revascularization, or those with myocardial disease without coronary stenosis. Its diagnosis can be performed with an advanced imaging technique such as positron emission tomography, which represents the gold standard for diagnosing microvascular abnormalities. In recent years, cardiovascular magnetic resonance and cardiac computed tomography have demonstrated to be emerging modalities for microcirculation assessment. The identification of microvascular disease represents a fundamental step in the characterization of patients with chest pain and no epicardial coronary disease: its identification is important to manage medical strategies and improve prognosis. The present overview summarizes the main techniques and current evidence of these advanced imaging strategies in assessing microvascular dysfunction and, if present, their relationship with invasive evaluation.
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Dempsey S, So A, Samani A. Characterizing regional myofiber damage post acute myocardial infarction using global optimization. Comput Biol Med 2021; 130:104207. [PMID: 33434659 DOI: 10.1016/j.compbiomed.2021.104207] [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: 08/14/2020] [Revised: 12/15/2020] [Accepted: 12/30/2020] [Indexed: 10/22/2022]
Abstract
Medical imaging derived cardiac biomechanical models offer a wealth of new information to be used in diagnosis and prognosis of cardiovascular disease. A noteworthy feature of such models is the ability to predict myofiber contraction stresses during acute or chronic ischemic events. Current techniques for heterogeneous contraction models require tissue motion tracking capabilities which are neither available on all imaging modalities, nor currently used in the clinic. Proposed in this article is a proof of concept of a tissue tracking independent technique focused on shape optimization to predict the contraction stresses of in-silico left ventricle models simulating various acute myocardial infarction events. The technique involves three variables defined in the left ventricle muscle. Two of the variables represent the contraction stresses in the healthy and infarct regions while the third is a novel periinfarct variable defining a non-contracting myofiber state allowing finer classification of local myofiber damage. Results indicate that the contraction stress reconstruction errors are overall smaller than 12% when considering standard errors associated with population modelling for the new variable of interest.
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Affiliation(s)
- Sergio Dempsey
- School of Biomedical Engineering, Western University, Amit Chakma Engineering Building, London, Ontario, N6A 3K7, Canada
| | - Aaron So
- Department of Medical Biophysics, Western University, Medical Sciences Building, London, Ontario, N6A 5C1, Canada; Lawson Health Research Institute, St. Joseph's Health Care London, 750 Baseline Road E, London, Ontario, N6C 2R5, Canada
| | - Abbas Samani
- School of Biomedical Engineering, Western University, Amit Chakma Engineering Building, London, Ontario, N6A 3K7, Canada; Department of Medical Biophysics, Western University, Medical Sciences Building, London, Ontario, N6A 5C1, Canada; Department of Electrical and Computer Engineering, Western University, Thompson Engineering Building, Western University, London, Ontario, N6A 5B9, Canada; Imaging Research, Robarts Research Institute, Western University, 1151 Richmond St N, London, Ontario, 6A 5B7, Canada.
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Examining the impact of inducible ischemia on myocardial fibrosis and exercise capacity in hypertrophic cardiomyopathy. Sci Rep 2020; 10:15977. [PMID: 32994462 PMCID: PMC7524770 DOI: 10.1038/s41598-020-71394-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 08/11/2020] [Indexed: 11/22/2022] Open
Abstract
Myocardial ischemia in hypertrophic cardiomyopathy (HCM) is associated with poor outcomes. Vasodilator stress cardiac magnetic resonance (CMR) can detect and quantitate inducible ischemia in HCM patients. We hypothesized that myocardial ischemia assessed by CMR is associated with myocardial fibrosis and reduced exercise capacity in HCM. In 105 consecutive HCM patients, we performed quantitative assessment of left ventricular volume and mass, wall thickness, segmental wall thickening percent, segmental late Gadolinium enhancement (LGE), and extracellular volume fraction (ECV). Time-signal intensity curves of first pass perfusion sequences were generated for each segment at stress and rest. A myocardial perfusion reserve index (MPRI) (stress/rest slope) was calculated. Patients who underwent an echocardiographic (n = 73) and cardiopulmonary exercise test (n = 37) within 30 days were included. The mean age was 53.2 ± 15.4 years; 60% were male, and 82 patients had asymmetric hypertrophy. Segments with end diastolic thickness ≥ 1.2 cm had a higher burden of LGE (4.1% vs 0.5% per segment), reduced MPRI (2.6 ± 1.5 vs 3.1 ± 1.8) and reduced thickening percent (48.9 ± 41.7% vs. 105.3 ± 59.5%), (P < 0.0001 for all comparisons). Patients with ischemia (any segment with MPRI < 2) were more likely to have dynamic left ventricular outflow tract (LVOT) obstruction (63.3% vs 36.7%, P = 0.01), to be smokers (17% vs 6.9%, P = 0.04), and had a higher ECV (30% vs 28%, P = 0.04). The total LGE burden was similar between the two groups (P = 0.47). Increasing ischemia burden (number of segments with MPRI < 2) was associated with worsened ventilatory efficiency (VE/VCO2) (P < 0.001) but not peak oxygen consumption or anerobic threshold (P > 0.2). In a patient-level multivariable logistic regression model, only LVOT obstruction remained a significant predictor of ischemia burden (P = 0.03). Myocardial ischemia by CMR is associated with myocardial segmental dysfunction and interstitial fibrosis, as assessed by ECV, in HCM patients, even in segments free of LGE. Conversely, quantitative ischemia burden was not associated with replacement fibrosis as assessed by total LGE burden. Patients with ischemia had greater prevalence of dynamic LVOT obstruction; and in a subset of patients with cardiopulmonary exercise testing, ischemia burden was associated with worsened ventilatory efficiency.
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15
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Stress cardiac MRI in stable coronary artery disease. Curr Opin Cardiol 2020; 35:566-573. [PMID: 32649360 DOI: 10.1097/hco.0000000000000776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Non-invasive testing is often the first step in the evaluation of stable coronary artery disease (CAD). Stress cardiac magnetic resonance imaging (CMR) is an established modality with high diagnostic accuracy and prognostic value. This review will focus on the recent advances in understanding how stress CMR can help guide patient care. RECENT FINDINGS Diagnostic accuracy of stress CMR has been validated against coronary angiography with fractional flow reserve (FFR) in patients with stable CAD. Large registry data have shown stress CMR to have important prognostic importance and that its cost-effectiveness compares favorably to alternatives. In patients with stable CAD, guidance using a CMR based strategy led to equivalent outcomes when compared to coronary angiography with FFR. SUMMARY In persons with stable CAD, Stress CMR is an accurate and cost-effective imaging modality that should be considered in patients at intermediate pre-test probability of CAD. Prognostic studies have shown it to have excellent negative predictive value and that it can safely serve as a "gatekeeper" for invasive angiography.
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16
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Poli FE, Gulsin GS, March DS, Abdelaty AM, Parke KS, Wormleighton JV, McCann GP, Burton JO, Graham-Brown MP. The reliability and feasibility of non-contrast adenosine stress cardiovascular magnetic resonance T1 mapping in patients on haemodialysis. J Cardiovasc Magn Reson 2020; 22:43. [PMID: 32507107 PMCID: PMC7278072 DOI: 10.1186/s12968-020-00634-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 05/08/2020] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Identifying coronary artery disease (CAD) in patients with end-stage renal disease (ESRD) is challenging. Adenosine stress native T1 mapping with cardiovascular magnetic resonance (CMR) may accurately detect obstructive CAD and microvascular dysfunction in the general population. This study assessed the feasibility and reliability of adenosine stress native T1 mapping in patients on haemodialysis. METHODS The feasibility of undertaking rest and adenosine stress native T1 mapping using the single-shot Modified Look-Locker inversion recovery (MOLLI) sequence was assessed in 58 patients on maintenance haemodialysis using 3 T CMR. Ten patients underwent repeat stress CMR within 2 weeks for assessment of test-retest reliability of native T1, stress T1 and delta T1 (ΔT1). Interrater and intrarater agreement were assessed in 10 patients. Exploratory analyses were undertaken to assess associations between clinical variables and native T1 values in 51 patients on haemodialysis. RESULTS Mean age of participants was 55 ± 15 years, 46 (79%) were male, and median dialysis vintage was 21 (8; 48) months. All patients completed the scan without complications. Mean native T1 rest, stress and ΔT1 were 1261 ± 57 ms, 1297 ± 50 ms and 2.9 ± 2.5%, respectively. Interrater and intrarater agreement of rest T1, stress T1 and ΔT1 were excellent, with intraclass correlation coefficients (ICC) > 0.9 for all. Test-retest reliability of rest and stress native T1 were excellent or good (CoV 1.2 and 1.5%; ICC, 0.79 and 0.69, respectively). Test-retest reliability of ΔT1 was moderate to poor (CoV 27.4%, ICC 0.55). On multivariate analysis, CAD, diabetes mellitus and resting native T1 time were independent determinants of ΔT1 (β = - 0.275, p = 0.019; β = - 0.297, p = 0.013; β = - 0.455; p < 0.001, respectively). CONCLUSIONS Rest and adenosine stress native T1 mapping is feasible and well-tolerated amongst patients with ESRD on haemodialysis. Although rater agreement of the technique is excellent, test-retest reliability of ΔT1 is moderate to poor. Prospective studies should evaluate the relationship between this technique and established methods of CAD assessment and association with outcomes.
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Affiliation(s)
- Federica E Poli
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK
| | - Gaurav S Gulsin
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK
- NIHR Leicester Biomedical Research Centre, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Daniel S March
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK
- John Walls Renal Unit, University Hospitals Leicester NHS Trust, Leicester, UK
| | - Ahmed Msek Abdelaty
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK
| | - Kelly S Parke
- NIHR Leicester Biomedical Research Centre, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Joanne V Wormleighton
- NIHR Leicester Biomedical Research Centre, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Gerry P McCann
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK
- NIHR Leicester Biomedical Research Centre, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - James O Burton
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK
- John Walls Renal Unit, University Hospitals Leicester NHS Trust, Leicester, UK
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Matthew Pm Graham-Brown
- Department of Cardiovascular Sciences, University of Leicester and the NIHR Leicester Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, LE1 9HN, UK.
- NIHR Leicester Biomedical Research Centre, University Hospitals of Leicester NHS Trust, Leicester, UK.
- John Walls Renal Unit, University Hospitals Leicester NHS Trust, Leicester, UK.
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17
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Dondi M, Rodella C, Giubbini R, Camoni L, Karthikeyan G, Vitola JV, Einstein AJ, Arends BJ, Morozova O, Pascual TN, Paez D. Inter-reader variability of SPECT MPI readings in low- and middle-income countries: Results from the IAEA-MPI Audit Project (I-MAP). J Nucl Cardiol 2020; 27:465-478. [PMID: 30168029 PMCID: PMC7174263 DOI: 10.1007/s12350-018-1407-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 08/03/2018] [Indexed: 10/29/2022]
Abstract
BACKGROUND Consistency of results between different readers is an important issue in medical imaging, as it affects portability of results between institutions and may affect patient care. The International Atomic Energy Agency (IAEA) in pursuing its mission of fostering peaceful applications of nuclear technologies has supported several training activities in the field of nuclear cardiology (NC) and SPECT myocardial perfusion imaging (MPI) in particular. The aim of this study was to verify the outcome of those activities through an international clinical audit on MPI where participants were requested to report on studies distributed from a core lab. METHODS The study was run in two phases: in phase 1, SPECT MPI studies were distributed as raw data and full processing was requested as per local practice. In phase 2, images from studies pre-processed at the core lab were distributed. Data to be reported included summed stress score (SSS); summed rest score (SRS); summed difference score (SDS); left ventricular (LV) ejection fraction (EF) and end- diastolic volume (EDV). Qualitative appraisals included the assessment of perfusion and presence of ischemia, scar or mixed patterns, presence of transient ischemic dilation (TID), and risk for cardiac events (CE). Twenty-four previous trainees from low- and middle-income countries participated (core participants group) and their results were assessed for inter-observer variability in each of the two phases, and for changes between phases. The same evaluations were performed for a group of eleven international experts (experts group). Results were also compared between the groups. RESULTS Expert readers showed an excellent level of agreement for all parameters in both phase 1 and 2. For core participants, the concordance of all parameters in phase 1 was rated as good to excellent. Two parameters which were re-evaluated in phase 2, namely SSS and SRS, showed an increased level of concordance, up to excellent in both cases. Reporting of categorical variables by expert readers remained almost unchanged between the two phases, while core participants showed an increase in phase 2. Finally, pooled LVEF values did not show a significant difference between core participants and experts. However, significant differences were found between LVEF values obtained using different software packages for cardiac analysis. CONCLUSIONS In this study, inter-observer agreement was moderate-to-good for core group readers and good-to-excellent for expert readers. The quality of reporting is affected by the quality of processing. These results confirm the important role of the IAEA training activities in improving imaging in low- and middle-income countries.
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Affiliation(s)
- Maurizio Dondi
- Nuclear Medicine Department, University of Brescia, Brescia, Italy.
- Nuclear Medicine and Diagnostic Imaging Section, Division of Human Health, International Atomic Energy Agency, Vienna, Austria.
| | - Carlo Rodella
- Department of Medical Physics, Spedali Civili di Brescia, Brescia, Italy
| | | | - Luca Camoni
- Nuclear Medicine Department, University of Brescia, Brescia, Italy
| | - Ganesan Karthikeyan
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Andrew J Einstein
- Department of Medicine, Division of Cardiology, and Department of Radiology, Columbia University Irving Medical Center, New York, USA
| | - Bertjan J Arends
- Department of Medical Physics, Catharina Hospital, Eindhoven, The Netherlands
| | - Olga Morozova
- Nuclear Medicine and Diagnostic Imaging Section, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Thomas N Pascual
- Nuclear Medicine and Diagnostic Imaging Section, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Diana Paez
- Nuclear Medicine and Diagnostic Imaging Section, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
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Ong P, Safdar B, Seitz A, Hubert A, Beltrame JF, Prescott E. Diagnosis of coronary microvascular dysfunction in the clinic. Cardiovasc Res 2020; 116:841-855. [DOI: 10.1093/cvr/cvz339] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Abstract
Abstract
The coronary microcirculation plays a pivotal role in the regulation of coronary blood flow and cardiac metabolism. It can adapt to acute and chronic pathologic conditions such as coronary thrombosis or long-standing hypertension. Due to the fact that the coronary microcirculation cannot be visualized in human beings in vivo, its assessment remains challenging. Thus, the clinical importance of the coronary microcirculation is still often underestimated or even neglected. Depending on the clinical condition of the respective patient, several non-invasive (e.g. transthoracic Doppler-echocardiography assessing coronary flow velocity reserve, cardiac magnetic resonance imaging, positron emission tomography) and invasive methods (e.g. assessment of coronary flow reserve (CFR) and microvascular resistance (MVR) using adenosine, microvascular coronary spasm with acetylcholine) have been established for the assessment of coronary microvascular function. Individual patient characteristics, but certainly also local availability, methodical expertise and costs will influence which methods are being used for the diagnostic work-up (non-invasive and/or invasive assessment) in a patient with recurrent symptoms and suspected coronary microvascular dysfunction. Recently, the combined invasive assessment of coronary vasoconstrictor as well as vasodilator abnormalities has been titled interventional diagnostic procedure (IDP). It involves intracoronary acetylcholine testing for the detection of coronary spasm as well as CFR and MVR assessment in response to adenosine using a dedicated wire. Currently, the IDP represents the most comprehensive coronary vasomotor assessment. Studies using the IDP to better characterize the endotypes observed will hopefully facilitate development of tailored and effective treatments.
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Affiliation(s)
- Peter Ong
- Department of Cardiology, Robert-Bosch-Krankenhaus, Auerbachstr. 110, 70376 Stuttgart, Germany
| | - Basmah Safdar
- Department of Emergency Medicine, Yale University, New Haven, CT, USA
| | - Andreas Seitz
- Department of Cardiology, Robert-Bosch-Krankenhaus, Auerbachstr. 110, 70376 Stuttgart, Germany
| | - Astrid Hubert
- Department of Cardiology, Robert-Bosch-Krankenhaus, Auerbachstr. 110, 70376 Stuttgart, Germany
| | - John F Beltrame
- The Queen Elizabeth Hospital Discipline of Medicine, University of Adelaide, Central Adelaide Local Health Network, Adelaide, Australia
| | - Eva Prescott
- Department of Cardiology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
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Impact of baseline calibration on semiquantitative assessment of myocardial perfusion reserve by adenosine stress MRI. Int J Cardiovasc Imaging 2019; 36:521-532. [PMID: 31728679 DOI: 10.1007/s10554-019-01729-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 11/03/2019] [Indexed: 12/31/2022]
Abstract
In this study, we sought to investigate the impact of baseline calibration, which is used in quantitative cardiac MRI perfusion analysis to correct for surface coil inhomogeneity and noise, on myocardial perfusion reserve index (MPRI) and its contribution to previously reported paradoxical low MPRI < 1.0 in patients with unobstructed coronary arteries. Semiquantitative perfusion analysis was performed in 20 patients with unobstructed coronary arteries undergoing stress/rest perfusion CMR and in ten patients undergoing paired rest perfusion CMR. The following baseline calibration settings were compared: (1) baseline division, (2) baseline subtraction and (3) no baseline calibration. In uncalibrated analysis, we observed ~ 20% segmental dispersion of signal intensity (SI)-over-time curves. Both baseline subtraction and baseline division reduced relative dispersion of t0-SI (p < 0.001), but only baseline division corrected for dispersion of peak-SI and maximum upslope also (p < 0.001). In the assessment of perfusion indices, however, baseline division resulted in paradoxical low MPRI (1.01 ± 0.23 vs. 1.63 ± 0.38, p < 0.001) and rest perfusion index (RPI 0.54 ± 0.07 vs. 0.94 ± 0.12, p < 0.001), respectively. This was due to a reversed ratio of blood-pool and myocardial baseline-SI before the second perfusion study caused by circulating contrast agent from the first injection. In conclusion, baseline division reliably corrects for inhomogeneity of the surface coil sensitivity profile facilitating comparisons of regional myocardial perfusion during hyperemia or at rest. However, in the assessment of MPRI, baseline division can lead to paradoxical low results (even MPRI < 1.0 in patients with unobstructed coronary arteries) potentially mimicking severely impaired perfusion reserve. Thus, in the assessment of MPRI we propose to waive baseline calibration.
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20
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Nazir MS, Gould SM, Milidonis X, Reyes E, Ismail TF, Neji R, Roujol S, O’Doherty J, Xue H, Barrington SF, Schaeffter T, Razavi R, Marsden P, Kellman P, Plein S, Chiribiri A. Simultaneous 13N-Ammonia and gadolinium first-pass myocardial perfusion with quantitative hybrid PET-MR imaging: a phantom and clinical feasibility study. Eur J Hybrid Imaging 2019; 3:15. [PMID: 31544170 PMCID: PMC6718374 DOI: 10.1186/s41824-019-0062-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 07/15/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Positron emission tomography (PET) is the non-invasive reference standard for myocardial blood flow (MBF) quantification. Hybrid PET-MR allows simultaneous PET and cardiac magnetic resonance (CMR) acquisition under identical experimental and physiological conditions. This study aimed to determine feasibility of simultaneous 13N-Ammonia PET and dynamic contrast-enhanced CMR MBF quantification in phantoms and healthy volunteers. METHODS Images were acquired using a 3T hybrid PET-MR scanner. Phantom study: MBF was simulated at different physiological perfusion rates and a protocol for simultaneous PET-MR perfusion imaging was developed. Volunteer study: five healthy volunteers underwent adenosine stress. 13N-Ammonia and gadolinium were administered simultaneously. PET list mode data was reconstructed using ordered subset expectation maximisation. CMR MBF was quantified using Fermi function-constrained deconvolution of arterial input function and myocardial signal. PET MBF was obtained using a one-tissue compartment model and image-derived input function. RESULTS Phantom study: PET and CMR MBF measurements demonstrated high repeatability with intraclass coefficients 0.98 and 0.99, respectively. There was high correlation between PET and CMR MBF (r = 0.98, p < 0.001) and good agreement (bias - 0.85 mL/g/min; 95% limits of agreement 0.29 to - 1.98). Volunteer study: Mean global stress MBF for CMR and PET were 2.58 ± 0.11 and 2.60 ± 0.47 mL/g/min respectively. On a per territory basis, there was moderate correlation (r = 0.63, p = 0.03) and agreement (bias - 0.34 mL/g/min; 95% limits of agreement 0.49 to - 1.18). CONCLUSION Simultaneous MBF quantification using hybrid PET-MR imaging is feasible with high test repeatability and good to moderate agreement between PET and CMR. Future studies in coronary artery disease patients may allow cross-validation of techniques.
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Affiliation(s)
- Muhummad Sohaib Nazir
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Sarah-May Gould
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Xenios Milidonis
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Eliana Reyes
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Tevfik F. Ismail
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Radhouene Neji
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
- Siemens Healthcare Limited, Sir William Siemens Square, Frimley, Camberley, GU16 8QD UK
| | - Sébastien Roujol
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Jim O’Doherty
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Hui Xue
- National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, MD USA
| | - Sally F. Barrington
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Tobias Schaeffter
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
- Physikalisch-Technische Bundesanstalt, Berlin, Germany
| | - Reza Razavi
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Paul Marsden
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
| | - Peter Kellman
- National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, MD USA
| | - Sven Plein
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, Clarendon Way, University of Leeds, Leeds, LS2 9JT UK
| | - Amedeo Chiribiri
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, St Thomas’ Hospital, Westminster Bridge, 4th Floor Lambeth Wing, London, SE1 7EH UK
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Seitz A, Kaesemann P, Chatzitofi M, Löbig S, Tauscher G, Bekeredjian R, Sechtem U, Mahrholdt H, Greulich S. Impact of caffeine on myocardial perfusion reserve assessed by semiquantitative adenosine stress perfusion cardiovascular magnetic resonance. J Cardiovasc Magn Reson 2019; 21:33. [PMID: 31230593 PMCID: PMC6589875 DOI: 10.1186/s12968-019-0542-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/20/2019] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Adenosine is used in stress perfusion cardiac imaging to reveal myocardial ischemia by its vasodilator effects. Caffeine is a competitive antagonist of adenosine. However, previous studies reported inconsistent results about the influence of caffeine on adenosine's vasodilator effect. This study assessed the impact of caffeine on the myocardial perfusion reserve index (MPRI) using adenosine stress cardiovascular magnetic resonance imaging (CMR). Moreover, we sought to evaluate if the splenic switch-off sign might be indicative of prior caffeine consumption. METHODS Semiquantitative perfusion analysis was performed in 25 patients who underwent: 1) caffeine-naïve adenosine stress CMR demonstrating myocardial ischemia and, 2) repeat adenosine stress CMR after intake of caffeine. MPRI (global; remote and ischemic segments), and splenic perfusion ratio (SPR) were assessed and compared between both exams. RESULTS Global MPRI after caffeine was lower vs. caffeine-naïve conditions (1.09 ± 0.19 vs. 1.24 ± 0.19; p < 0.01). MPRI in remote myocardium decreased by caffeine (1.24 ± 0.19 vs. 1.49 ± 0.19; p < 0.001) whereas MPRI in ischemic segments (0.89 ± 0.18 vs. 0.95 ± 0.23; p = 0.23) was similar, resulting in a lower MPRI ratio (=remote/ischemic segments) after caffeine consumption vs. caffeine-naïve conditions (1.41 ± 0.19 vs. 1.64 ± 0.35, p = 0.01). The SPR was unaffected by caffeine (SPR 0.38 ± 0.19 vs. 0.38 ± 0.18; p = 0.92). CONCLUSION Caffeine consumption prior to adenosine stress CMR results in a lower global MPRI, which is driven by the decreased MPRI in remote myocardium and underlines the need of abstinence from caffeine. The splenic switch-off sign is not affected by prior caffeine intake.
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Affiliation(s)
- Andreas Seitz
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Philipp Kaesemann
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Maria Chatzitofi
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Stephanie Löbig
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Gloria Tauscher
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Raffi Bekeredjian
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Udo Sechtem
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Heiko Mahrholdt
- Department of Cardiology, Robert Bosch Medical Center, Auerbachstraße 110, 70376 Stuttgart, Germany
| | - Simon Greulich
- Department of Cardiology and Angiology, University Hospital Tübingen, Tübingen, Germany
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Brown LAE, Onciul SC, Broadbent DA, Johnson K, Fent GJ, Foley JRJ, Garg P, Chew PG, Knott K, Dall’Armellina E, Swoboda PP, Xue H, Greenwood JP, Moon JC, Kellman P, Plein S. Fully automated, inline quantification of myocardial blood flow with cardiovascular magnetic resonance: repeatability of measurements in healthy subjects. J Cardiovasc Magn Reson 2018; 20:48. [PMID: 29983119 PMCID: PMC6036695 DOI: 10.1186/s12968-018-0462-y] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 05/23/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Non-invasive assessment of myocardial ischaemia is a cornerstone of the diagnosis of coronary artery disease. Measurement of myocardial blood flow (MBF) using positron emission tomography (PET) is the current reference standard for non-invasive quantification of myocardial ischaemia. Dynamic myocardial perfusion cardiovascular magnetic resonance (CMR) offers an alternative to PET and a recently developed method with automated inline perfusion mapping has shown good correlation of MBF values between CMR and PET. This study assessed the repeatability of myocardial perfusion mapping by CMR in healthy subjects. METHODS Forty-two healthy subjects were recruited and underwent adenosine stress and rest perfusion CMR on two visits. Scans were repeated with a minimum interval of 7 days. Intrastudy rest and stress MBF repeatability were assessed with a 15-min interval between acquisitions. Interstudy rest and stress MBF and myocardial perfusion reserve (MPR) were measured for global myocardium and regionally for coronary territories and slices. RESULTS There was no significant difference in intrastudy repeated global rest MBF (0.65 ± 0.13 ml/g/min vs 0.62 ± 0.12 ml/g/min, p = 0.24, repeatability coefficient (RC) =24%) or stress (2.89 ± 0.56 ml/g/min vs 2.83 ± 0.64 ml/g/min, p = 0.41, RC = 29%) MBF. No significant difference was seen in interstudy repeatability for global rest MBF (0.64 ± 0.13 ml/g/min vs 0.64 ± 0.15 ml/g/min, p = 0.80, RC = 32%), stress MBF (2.71 ± 0.61 ml/g/min vs 2.55 ± 0.57 ml/g/min, p = 0.12, RC = 33%) or MPR (4.24 ± 0.69 vs 3.73 ± 0.76, p = 0.25, RC = 36%). Regional repeatability was good for stress (RC = 30-37%) and rest MBF (RC = 32-36%) but poorer for MPR (RC = 35-43%). Within subject coefficient of variation was 8% for rest and 11% for stress within the same study, and 11% for rest and 12% for stress between studies. CONCLUSIONS Fully automated, inline, myocardial perfusion mapping by CMR shows good repeatability that is similar to the published PET literature. Both rest and stress MBF show better repeatability than MPR, particularly in regional analysis.
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Affiliation(s)
- Louise A. E. Brown
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Sebastian C. Onciul
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - David A. Broadbent
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
- Medical Physics and Engineering, Leeds Teaching Hospitals NHS Trust, Leeds, LS1 3EX UK
| | - Kerryanne Johnson
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Graham J. Fent
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - James R. J. Foley
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Pankaj Garg
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Pei G. Chew
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Kristopher Knott
- Barts Heart Centre, The Cardiovascular Magnetic Resonance Imaging Unit and The Inherited Cardiovascular Diseases Unit, St Bartholomew’s Hospital, West Smithfield, London, UK
| | - Erica Dall’Armellina
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Peter P. Swoboda
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - Hui Xue
- National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, MD USA
| | - John P. Greenwood
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
| | - James C. Moon
- Barts Heart Centre, The Cardiovascular Magnetic Resonance Imaging Unit and The Inherited Cardiovascular Diseases Unit, St Bartholomew’s Hospital, West Smithfield, London, UK
| | - Peter Kellman
- National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, MD USA
| | - Sven Plein
- Multidisciplinary Cardiovascular Research Centre (MCRC) & Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT UK
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Al-Badri A, Wei J, Landes S, Motwani M, Cook-Wiens G, Nelson MD, Mehta PK, Shufelt C, Sharif B, Li D, Berman DS, Thomson LEJ, Merz CNB. Inter-scan Reproducibility of Cardiovascular Magnetic Resonance Imaging-Derived Myocardial Perfusion Reserve Index in Women with no Obstructive Coronary Artery Disease. CURRENT TRENDS IN CLINICAL & MEDICAL IMAGING 2018; 2:555587. [PMID: 30976755 PMCID: PMC6455951 DOI: 10.19080/ctcmi.2018.02.555587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Cardiovascular magnetic resonance imaging (CMRI) derived myocardial perfusion reserve index (MPRI) has recently been shown to detect coronary microvascular dysfunction (CMD) in women with signs and symptoms of ischemia and no obstructive coronary artery disease (CAD). The aim of this study was to determine the inter-scan reproducibility of MPRI in this patient group in order to assess its diagnostic robustness in serial scans and assess its utility as a marker of potential therapies for CMD. METHODS Rest/stress perfusion CMR was performed at 1.5T using a standardized protocol in 17 women with signs and symptoms of ischemia and no obstructive CAD on two separate days (within 90 days of each other). The same pharmacological stress agent (adenosine/regadenoson) was used for both scans. MPRI was calculated from time-intensity curves of the whole myocardium and blood pool at stress and rest. One experienced observer, blinded to clinical data, performed all measurements. Intra-class correlation coefficients (ICC), coefficient of variation (CoV), and Bland-Altman plots were determined. RESULTS Mean age was 53±10 years old and BMI 28±7 kg/m2; 47% had hypertension, 4% diabetes, 9% hyperlipidemia and 10% family history of CAD. Mean MPRI for the 17 women was higher for scan 2 compared to scan 1 (1.98±0.3 vs. 1.65±0.78, respectively, p<0.001); and this relationship persisted even when corrected for resting rate pressure product (RPP) (2.42±0.81 vs. 1.97±0.92, respectively, 0.002), The mean bias for MPRI between sequential scans was 0.34 (95% CI: 0.18 to 0.49, limits of agreement: -0.31, 0.98 and when corrected for resting RPP it was 0.45 (95% CI: 0.21 to 0.68, limits of agreement: -0.52, 1.41), ICC and CoV also indicated modest inter-scan reproducibility (ICC 0.57; CoV 20.3%), but both measures were comparable to values seen in prior studies in CAD populations and healthy volunteers. CONCLUSION Inter-scan reproducibility of CMRI-derived MPRI in women with suspected CMD is modest, with relatively wide limits of agreement. This variability is similar to that seen in other populations, suggesting that some caution must be exercised when using absolute MPRI cut-offs in isolation for the diagnosis of CMD or repeated measures of MPRI to track response to therapy. Additional work is ongoing to improve reproducibility from both biological and technological standpoints.
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Affiliation(s)
| | | | | | - Manish Motwani
- S Mark Taper Foundation Imaging Center, Cedars-Sinai Medical Center, USA
| | - Galen Cook-Wiens
- Biostatistics and Bioinformatics Research Center, Cedars-Sinai Medical Center, USA
| | | | | | | | - Behzad Sharif
- S Mark Taper Foundation Imaging Center, Cedars-Sinai Medical Center, USA
| | - Debiao Li
- S Mark Taper Foundation Imaging Center, Cedars-Sinai Medical Center, USA
| | - Daniel S Berman
- S Mark Taper Foundation Imaging Center, Cedars-Sinai Medical Center, USA
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24
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CMR First-Pass Perfusion for Suspected Inducible Myocardial Ischemia. JACC Cardiovasc Imaging 2017; 9:1338-1348. [PMID: 27832901 DOI: 10.1016/j.jcmg.2016.09.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/26/2016] [Accepted: 09/08/2016] [Indexed: 01/28/2023]
Abstract
Cardiovascular magnetic resonance (CMR) has evolved from a pioneering research tool to an established noninvasive imaging method for detecting inducible myocardial perfusion deficits. In this consensus document, experts of different imaging techniques summarize the existing body of evidence regarding CMR perfusion as a viable complement to other established noninvasive tools for the assessment of perfusion and discuss the advantages and pitfalls of the technique. A rapid, standardized CMR perfusion protocol is described, which is safe, clinically feasible, and cost-effective for centers with contemporary magnetic resonance equipment. CMR perfusion can be recommended as a routine diagnostic tool to identify inducible myocardial ischemia.
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25
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Henein MY, Bengrid T, Nicoll R, Zhao Y, Johansson B, Schmermund A. Coronary calcification compromises myocardial perfusion irrespective of luminal stenosis. IJC HEART & VASCULATURE 2017; 14:41-45. [PMID: 28616562 PMCID: PMC5454181 DOI: 10.1016/j.ijcha.2016.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 12/16/2016] [Indexed: 12/03/2022]
Abstract
Aim The aim of this study was to evaluate the relationship between coronary artery calcification (CAC) assessed by multi-detector computed tomography (MDCT) and myocardial perfusion assessed by cardiac magnetic resonance imaging (CMR) in a group of symptomatic patients. Method Retrospective analysis of 120 patients (age 65.1 ± 8.9 years, 88 males) who presented with atypical chest pain to Bethanien Hospital, Frankfurt, Germany, between 2007 and 2010 and who underwent CAC scoring using MDCT, CMR, and conventional coronary angiography. Patients were divided into those with high-grade (HG) stenosis (n = 67, age 65.1 ± 9.4 years) and those with no-HG stenosis (n = 53, age 65.1 ± 8.6 years). Results There were more males with HG stenosis (82.1% vs. 62.3%, p = 0.015), in whom the percentage and number of abnormal perfusion segments were higher at rest (37.3% vs. 17%, p = 0.014) but not different with stress (p = 0.83) from those with no-HG stenosis. Thirty-four patients had myocardial perfusion abnormalities at rest and 26 patients developed perfusion defects with stress. Stress-induced myocardial perfusion defects were 22.4% sensitive and 79.2% specific for detecting HG stenosis. The CAC score was lower in patients with no-HG stenosis compared to those with HG stenosis (p < 0.0001). On the ROC curve, a CAC score of 293 had a sensitivity of 71.6% and specificity of 83% in predicting HG stenosis [(AUC 0.80 (p < 0.0001)]. A CAC score of 293 or the presence of at least 1 segment myocardial perfusion abnormality was 74.6% sensitive and 71.7% specific in detecting HG stenosis, the respective values for the 2 abnormalities combined being 19.4% and 90.6%. The severity of CAC correlated with the extent of myocardial perfusion in the patient group as a whole with stress (r = 0.22, p = 0.015), particularly in those with no-HG stenosis (r = 0.31, p = 0.022). A CAC score of 293 was 31.6% sensitive and 87.3% specific in detecting myocardial perfusion abnormalities. Conclusion In a group of patients with exertional angina, coronary calcification is more accurate in detecting high-grade luminal stenosis than myocardial perfusion defects. In addition, in patients with no stenosis, the incremental relationship between coronary calcium score and the extent of myocardial perfusion suggests coronary wall hardening as an additional mechanism for stress-induced angina other than luminal narrowing. These preliminary findings might have a clinical impact on management strategies of these patients other than conventional therapy.
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Affiliation(s)
- Michael Y Henein
- Department of Public Health and Clinical Medicine and Heart Centre, Umeå University, Umeå, Sweden
| | - Tarek Bengrid
- Department of Public Health and Clinical Medicine and Heart Centre, Umeå University, Umeå, Sweden
| | - Rachel Nicoll
- Department of Public Health and Clinical Medicine and Heart Centre, Umeå University, Umeå, Sweden
| | - Ying Zhao
- Ultrasound Department, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Bengt Johansson
- Department of Public Health and Clinical Medicine and Heart Centre, Umeå University, Umeå, Sweden
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26
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Michelsen MM, Mygind ND, Frestad D, Prescott E. Women with Stable Angina Pectoris and No Obstructive Coronary Artery Disease: Closer to a Diagnosis. Eur Cardiol 2017; 12:14-19. [PMID: 30416544 DOI: 10.15420/ecr.2016:33:2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
A large proportion of women with chest pain have no obstructive coronary artery disease. Recent studies have demonstrated that these women continue to have symptoms and are at increased risk of cardiovascular morbidity and mortality. Coronary microvascular dysfunction (CMD) leads to an impairment of blood flow regulation to the myocardium and possible transient ischaemia. CMD is a disease entity with several pathophysiologic aspects and diagnostic modalities continue to be developed. However, due to the complexity of the disease, it remains elusive whether CMD is the explanation for the symptoms and the poor prognosis in women with angina and no obstructive coronary artery disease.
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Affiliation(s)
- Marie Mide Michelsen
- Department of Cardiology, Bispebjerg Hospital, University of Copenhagen Copenhagen, Denmark
| | - Naja Dam Mygind
- Department of Cardiology, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Daria Frestad
- Department of Cardiology, Hvidovre Hospital, University of Copenhagen Copenhagen, Denmark
| | - Eva Prescott
- Department of Cardiology, Bispebjerg Hospital, University of Copenhagen Copenhagen, Denmark
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27
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Wei J, Mehta PK, Shufelt C, Yang Y, Gill E, Kahlon R, Cook-Wiens G, Minissian M, Kar S, Thomson L, Berman D, Merz CNB. Diastolic dysfunction measured by cardiac magnetic resonance imaging in women with signs and symptoms of ischemia but no obstructive coronary artery disease. Int J Cardiol 2016; 220:775-80. [PMID: 27394973 PMCID: PMC8288774 DOI: 10.1016/j.ijcard.2016.06.198] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Revised: 06/21/2016] [Accepted: 06/25/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Women with chest pain and no obstructive coronary artery disease often have coronary microvascular dysfunction (CMD), diagnosed by invasive coronary reactivity testing (CRT). The relationship between CMD and diastolic function measured by cardiac magnetic resonance imaging (CMR) is not well described. METHODS 41 women with suspected CMD underwent CRT and CMR. Left ventricular end-diastolic pressure (LVEDP), coronary flow reserve (CFR) and coronary blood flow (CBF) were measured invasively. Resting CMR of these women and 20 reference controls was assessed for LV mass, septal wall thickness, ejection fraction (LVEF), end-diastolic volume (EDV), peak filling rate (PFR) and time-to-peak-filling rate (tPFR). Pearson correlations and linear regression models were made. RESULTS Mean age was 55±9, all had LVEF≥50%, and 16/41 (40%) had LVEDP>15mmHg. CMD (CFR<2.5 or CBF<50%) was present in 34/41 (83%) women. tPFR (mean 178±110ms) and PFR (mean 3.2±0.64 EDV/s) were not significantly different in women with or without CMD. tPFR increased with age (r=0.37, p=0.017) and septal wall thickness (r=0.47, p=0.002), while PFR decreased with age (r=-0.45, p=0.003). There was an inverse relationship between CFR and tPFR (r=-0.3, p=0.058). Increasing mass was associated with decreasing CBF (p=0.02). Compared to controls, cases had lower LVEF (p=0.049) and lower EDV (p=0.0002). CONCLUSION In women with signs and symptoms of ischemia but no obstructive coronary artery disease, CMD and elevated LVEDP are prevalent. While non-endothelial dependent CMD may be related to diastolic dysfunction, further investigation is needed regarding links between CMD, diastolic dysfunction and the development of heart failure with preserved LVEF.
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Affiliation(s)
- Janet Wei
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Puja K Mehta
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Chrisandra Shufelt
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - YuChing Yang
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Edward Gill
- S. Mark Taper Foundation Imaging Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Ravi Kahlon
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Galen Cook-Wiens
- Biostatistics & Bioinformatics Core, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Margo Minissian
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Saibal Kar
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Louise Thomson
- S. Mark Taper Foundation Imaging Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Daniel Berman
- S. Mark Taper Foundation Imaging Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - C Noel Bairey Merz
- Barbara Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States.
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28
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Sampath S, Parimal AS, Feng D, Chang MML, Baumgartner R, Klimas M, Jacobsen K, Manigbas E, Gsell W, Evelhoch JL, Chin CL. Quantitative MRI biomarkers to characterize regional left ventricular perfusion and function in nonhuman primates during dobutamine-induced stress: A reproducibility and reliability study. J Magn Reson Imaging 2016; 45:556-569. [PMID: 27384520 DOI: 10.1002/jmri.25379] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 06/22/2016] [Indexed: 01/07/2023] Open
Abstract
PURPOSE To identify reproducible and reliable noninvasive regional imaging biomarkers of cardiac function and perfusion at rest and under stress in healthy nonhuman primates (NHPs) that may be used in the future for the early characterization of preclinical heart failure models, to evaluate therapy, and for clinical translation. MATERIALS AND METHODS Seven naive cynomolgus macaques underwent test-retest 3T cardiac MRI tagging and dual-bolus perfusion experiments. Regional cardiac function biomarkers, such as peak circumferential strain (CS), average diastolic strain-rate (DSR), contractile reserve (CR), diastolic reserve, peak torsion, and torsion reserve were quantified. Further, regional myocardial blood flow (MBF), myocardial perfusion reserve (MPR), and myocardial perfusion reserve-to-contractile reserve (MPR/CR) were also derived. Inter- and intraobserver reproducibility and test-retest reliability analyses were conducted using the reliability and generalizability coefficients including correlation coefficient (CC) and intraclass correlation coefficient (ICC). RESULTS Overall, peak CS, DSR, and MBF are robust biomarkers at both rest and stress with moderate-good inter- and intraobserver reproducibility and test-retest reliability. At rest: intra-/interobserver reproducibility (CC): peak CS (0.81/0.81), DSR (0.81/0.81), MBF (0.72/0.57), peak torsion (0.79/0.79); test-retest reliability: (CC/ICC): peak CS (0.62/0.75), DSR (0.24/0.55), MBF (0.66/0.62), and peak torsion (0.79/0.78). Under stress: intra-/interobserver reproducibility (CC): peak CS (0.61/0.60), DSR (0.50/0.50), MBF (0.63/0.61), MPR (0.43/0.43), and peak torsion (0.38/0.38); test-retest reliability: (CC/ICC): peak CS (0.58/0.58), DSR (0.24/0.43), MBF (0.58/0.58), MPR (0.43/0.38), and peak torsion (0.38/0.38). CONCLUSION We demonstrated the feasibility of using cardiac MRI to characterize left ventricular functional and perfusion responses to stress in an NHP species, and specific robust biomarkers such as peak CS, DSR, MBF, diastolic reserve, and MPR have been identified for clinical translation and drug research. LEVEL OF EVIDENCE 1 J. Magn. Reson. Imaging 2017;45:556-569.
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Affiliation(s)
- Smita Sampath
- Translational Biomarkers, Merck Research Laboratories, MSD, Singapore
| | | | - Dai Feng
- Biometric Research, Biostatistics and Research Decision Sciences, Merck Research Laboratories, Merck & Co. Inc., Rahway, New Jersey, USA
| | | | - Richard Baumgartner
- Biometric Research, Biostatistics and Research Decision Sciences, Merck Research Laboratories, Merck & Co. Inc., Rahway, New Jersey, USA
| | - Michael Klimas
- Translational Biomarkers, Merck Research Laboratories, Merck & Co. Inc., West Point, Pennsylvania, USA
| | - Kirsten Jacobsen
- In Vivo Pharmacology, Merck Research Laboratories, MSD, Singapore
| | | | | | - Jeffrey L Evelhoch
- Translational Biomarkers, Merck Research Laboratories, Merck & Co. Inc., West Point, Pennsylvania, USA
| | - Chih-Liang Chin
- Translational Biomarkers, Merck Research Laboratories, MSD, Singapore
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29
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Kober F, Jao T, Troalen T, Nayak KS. Myocardial arterial spin labeling. J Cardiovasc Magn Reson 2016; 18:22. [PMID: 27071861 PMCID: PMC4830031 DOI: 10.1186/s12968-016-0235-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/22/2016] [Indexed: 11/10/2022] Open
Abstract
Arterial spin labeling (ASL) is a cardiovascular magnetic resonance (CMR) technique for mapping regional myocardial blood flow. It does not require any contrast agents, is compatible with stress testing, and can be performed repeatedly or even continuously. ASL-CMR has been performed with great success in small-animals, but sensitivity to date has been poor in large animals and humans and remains an active area of research. This review paper summarizes the development of ASL-CMR techniques, current state-of-the-art imaging methods, the latest findings from pre-clinical and clinical studies, and future directions. We also explain how successful developments in brain ASL and small-animal ASL-CMR have helped to inform developments in large animal and human ASL-CMR.
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Affiliation(s)
- Frank Kober
- />Aix-Marseille Université, CNRS CRMBM UMR 7339, Centre de Résonance Magnétique Biologique et Médicale, Marseille, France
| | - Terrence Jao
- />Department of Biomedical Engineering, University of Southern California, Los Angeles, California USA
| | - Thomas Troalen
- />Aix-Marseille Université, CNRS CRMBM UMR 7339, Centre de Résonance Magnétique Biologique et Médicale, Marseille, France
| | - Krishna S. Nayak
- />Department of Biomedical Engineering, University of Southern California, Los Angeles, California USA
- />Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California USA
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30
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Hall ME, Brinkley TE, Chughtai H, Morgan TM, Hamilton CA, Jordan JH, Stacey RB, Soots S, Hundley WG. Adiposity Is Associated with Gender-Specific Reductions in Left Ventricular Myocardial Perfusion during Dobutamine Stress. PLoS One 2016; 11:e0146519. [PMID: 26751789 PMCID: PMC4709095 DOI: 10.1371/journal.pone.0146519] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 12/18/2015] [Indexed: 01/27/2023] Open
Abstract
Background Obesity and visceral adiposity are increasingly recognized risk factors for cardiovascular disease. Visceral fat may reduce myocardial perfusion by impairing vascular endothelial function. Women experience more anginal symptoms compared to men despite less severe coronary artery stenosis, as assessed by angiography. Women and men have different fat storage patterns which may account for the observed differences in cardiovascular disease. Therefore, our objective was to evaluate the relationship between visceral adipose tissue distributions and myocardial perfusion in men and women. Methods Visceral and subcutaneous fat distributions and myocardial perfusion were measured in 69 men and women without coronary artery disease using magnetic resonance imaging techniques. Myocardial perfusion index was quantified after first-pass perfusion with gadolinium contrast at peak dose dobutamine stress. Results We observed inverse relationships between female gender (r = -0.35, p = 0.003), pericardial fat (r = -0.36, p = 0.03), intraperitoneal fat (r = -0.37, p = 0.001), and retroperitoneal fat (r = -0.36, p = 0.002) and myocardial perfusion index. Visceral fat depots were not associated with reduced myocardial perfusion at peak dose dobutamine in men. However, in women, BMI (r = -0.33, p = 0.04), pericardial fat (r = -0.53, p = 0.02), subcutaneous fat (r = -0.39, p = 0.01) and intraperitoneal fat (r = -0.30, p = 0.05) were associated with reduced myocardial perfusion during dobutamine stress. Conclusions Higher visceral fat volumes are associated with reduced left ventricular myocardial perfusion at peak dose dobutamine stress in women but not in men. These findings suggest that visceral fat may contribute to abnormal microcirculatory coronary artery perfusion syndromes, explaining why some women exhibit more anginal symptoms despite typically lower grade epicardial coronary artery stenoses than men.
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Affiliation(s)
- Michael E. Hall
- Department of Medicine, Division of Cardiology, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- * E-mail:
| | - Tina E. Brinkley
- Department of Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Haroon Chughtai
- Division of Cardiology, Beloit Memorial Hospital, Beloit, Wisconsin, United States of America
| | - Timothy M. Morgan
- Department of Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Craig A. Hamilton
- Department of Biomedical Engineering, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Jennifer H. Jordan
- Department of Medicine, Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - R. Brandon Stacey
- Department of Medicine, Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Sandra Soots
- Department of Medicine, Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - W. Gregory Hundley
- Department of Medicine, Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
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Likhite D, Suksaranjit P, Adluru G, Hu N, Weng C, Kholmovski E, McGann C, Wilson B, DiBella E. Interstudy repeatability of self-gated quantitative myocardial perfusion MRI. J Magn Reson Imaging 2015; 43:1369-78. [PMID: 26663511 DOI: 10.1002/jmri.25107] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 11/14/2015] [Indexed: 01/04/2023] Open
Abstract
PURPOSE To evaluate the interstudy repeatability of multislice quantitative cardiovascular magnetic resonance myocardial blood flow (MBF), myocardial perfusion reserve (MPR), and extracellular volume (ECV). A unique saturation recovery self-gated acquisition was used for the perfusion scans. MATERIALS AND METHODS An ungated golden angle radial turboFLASH pulse sequence was used to scan 10 subjects on two separate days on a 3T scanner. A single saturation pulse was followed by a set of four slices. Rest and hyperemia scans were acquired during free breathing. The images were reconstructed using an iterative algorithm with spatiotemporal constraints. The ungated images were retrospectively binned (self-gated) into near-systole and near-diastole. Deformable registration was performed to adjust for respiratory and residual cardiac motion, and the data were fit with a Fermi model to estimate the interstudy repeatability of quantitative self-gated MBF and MPR. RESULTS The coefficient of variation (CoV) of the territorial MPR using the self-gated near-systole data was 18.6%. The self-gated near-diastole data gave less good CoV of MPR, equal to 46.2%. For MBFs, and using smaller (segmental) regions, the CoVs were 20.1% and 22.7% for the estimation of myocardial blood flow at stress and rest, respectively, using the self-gated near-systole data. The self-gated near-diastole data gave CoV = 48.6% and 44.9% for stress and rest. CONCLUSION The self-gated free-breathing technique for quantification of myocardial blood flow showed good repeatability for near-systole, with results comparable to published studies on interstudy repeatability of quantitative myocardial perfusion MRI using ECG-gating and breath-holds. Self-gated near-diastole data results were less repeatable. J. Magn. Reson. Imaging 2016;43:1369-1378.
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Affiliation(s)
- Devavrat Likhite
- Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, Utah, USA
| | - Promporn Suksaranjit
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Ganesh Adluru
- Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, Utah, USA
| | - Nan Hu
- Department of Internal Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Cindy Weng
- Department of Internal Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Eugene Kholmovski
- Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, Utah, USA
| | - Chris McGann
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Brent Wilson
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Edward DiBella
- Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, Utah, USA.,Department of Bioengineering, University of Utah, Salt Lake City, Utah, USA
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Thomson LEJ, Wei J, Agarwal M, Haft-Baradaran A, Shufelt C, Mehta PK, Gill EB, Johnson BD, Kenkre T, Handberg EM, Li D, Sharif B, Berman DS, Petersen JW, Pepine CJ, Bairey Merz CN. Cardiac magnetic resonance myocardial perfusion reserve index is reduced in women with coronary microvascular dysfunction. A National Heart, Lung, and Blood Institute-sponsored study from the Women's Ischemia Syndrome Evaluation. Circ Cardiovasc Imaging 2015; 8:e002481. [PMID: 25801710 PMCID: PMC4375783 DOI: 10.1161/circimaging.114.002481] [Citation(s) in RCA: 176] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 01/30/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND Women with signs and symptoms of ischemia and no obstructive coronary artery disease often have coronary microvascular dysfunction (CMD), diagnosed by invasive coronary reactivity testing (CRT). Although traditional noninvasive stress imaging is often normal in CMD, cardiac MRI may be able to detect CMD in this population. METHODS AND RESULTS Vasodilator stress cardiac MRI was performed in 118 women with suspected CMD who had undergone CRT and 21 asymptomatic reference subjects. Semi-quantitative evaluation of the first-pass perfusion images was completed to determine myocardial perfusion reserve index (MPRI). The relationship between CRT findings and MPRI was examined by Pearson correlations, logistic regression, and sensitivity/specificity. Symptomatic women had lower mean pharmacological stress MPRI compared with reference subjects (1.71±0.43 versus 2.23±0.37; P<0.0001). Lower MPRI was predictive of ≥1 abnormal CRT variables (odds ratio =0.78 [0.70, 0.88], P<0.0001, c-statistic 0.78 [0.68, 0.88]). An MPRI threshold of 1.84 predicted CRT abnormality with sensitivity 73% and specificity 74%. CONCLUSIONS Noninvasive cardiac MRI MPRI can detect CMD defined by invasive CRT. Further work is aimed to optimize the noninvasive identification and management of CMD patients. CLINICAL TRIAL REGISTRATION URL: http://www.clinicaltrials.gov. Unique identifier: NCT00832702.
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Affiliation(s)
- Louise E J Thomson
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.).
| | - Janet Wei
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Megha Agarwal
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Afsaneh Haft-Baradaran
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Chrisandra Shufelt
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Puja K Mehta
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Edward B Gill
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - B Delia Johnson
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Tanya Kenkre
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Eileen M Handberg
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Debiao Li
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Behzad Sharif
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Daniel S Berman
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - John W Petersen
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - Carl J Pepine
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
| | - C Noel Bairey Merz
- From the Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (L.E.J.T., J.W., M.A., A.H.-B., C.S., P.K.M., E.B.G., D.S.B., C.N.B.M.); School of Public Health, University of Pittsburgh, PA (B.D.J., T.K.); Division of Cardiology, University of Florida, Gainesville (E.M.H., J.W.P., C.J.P.); and Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA (D.L., B.S.)
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Lawson MA, Bell SP, Adkisson DW, Wang L, Ooi H, Sawyer DB, Kronenberg MW. High reproducibility of adenosine stress cardiac MR myocardial perfusion imaging in patients with non-ischaemic dilated cardiomyopathy. BMJ Open 2014; 4:e005984. [PMID: 25515841 PMCID: PMC4275661 DOI: 10.1136/bmjopen-2014-005984] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the reproducibility of first-pass contrast-enhanced cardiac MR (CMR) myocardial perfusion imaging in patients with non-ischaemic dilated cardiomyopathy (NIDCM). DESIGN Prospective observational study. SETTING Single centre, tertiary care hospital. PARTICIPANTS 6 outpatient participants with NIDCM. OUTCOME Reproducibility of semiquantitative myocardial perfusion analysis by CMR. METHOD 6 patients with NIDCM were studied twice using first-pass of contrast transit through the left ventricular (LV) myocardium with a saturation-recovery gradient echo sequence at rest and during adenosine-induced hyperaemia. The anterior wall was divided into endocardial (Endo) and epicardial (Epi) segments. The Myocardial Perfusion Index (MPI) was calculated as the myocardial signal augmentation rate normalised to the LV cavity rate. The Myocardial Perfusion Reserve Index (MPRI) was calculated as hyperaemic/resting MPI. RESULTS Between study 1 and 2, median MPI was similar for resting Endo (0.076 vs 0.077), hyperaemic Endo (0.143 vs 0.143), resting Epi (0.073 vs 0.074), and hyperaemic Epi (0.135 vs 0.134). Median MPRI was similar for Endo (1.84 vs 1.87) and Epi (1.90 vs 2.00). Combining Endo and Epi MPI (N=12), there was excellent agreement between Study 1 and 2 for resting MPI (r=0.998, intraclass correlation coefficient (ICC) 0.998, coefficients of variation (CoV) 1.4%), hyperaemic MPI (r=0.979, ICC 0.963, CoV 3.3%) and MPRI (r=0.989, ICC 0.94, CoV 3.8%). CONCLUSIONS Resting and hyperaemic myocardial perfusion using a normalised upslope analysis during adenosine CMR is a highly reproducible technique in patients with NIDCM. TRIAL REGISTRATION NUMBER Clinical Trials.Gov ID NCT00574119.
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Affiliation(s)
- Mark A Lawson
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Susan P Bell
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Douglas W Adkisson
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Li Wang
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Henry Ooi
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Cardiology Section, Department of Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Douglas B Sawyer
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Marvin W Kronenberg
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Cardiology Section, Department of Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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Erhayiem B, Pavitt S, Baxter P, Andrews J, Greenwood JP, Buch MH, Plein S. Coronary Artery Disease Evaluation in Rheumatoid Arthritis (CADERA): study protocol for a randomized controlled trial. Trials 2014; 15:436. [PMID: 25381560 PMCID: PMC4233100 DOI: 10.1186/1745-6215-15-436] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 10/24/2014] [Indexed: 02/06/2023] Open
Abstract
Background The incidence of cardiovascular disease (CVD) in rheumatoid arthritis (RA) is increased compared to the general population. Immune dysregulation and systemic inflammation are thought to be associated with this increased risk. Early diagnosis with immediate treatment and tight control of RA forms a central treatment paradigm. It remains unclear, however, whether using tumor necrosis factor inhibitors (TNFi) to achieve remission confer additional beneficial effects over standard therapy, especially on the development of CVD. Methods/Design Coronary Artery Disease Evaluation in Rheumatoid Arthritis (CADERA) is a prospective cardiovascular imaging study that bolts onto an existing single-centre, randomized controlled trial, VEDERA (Very Early versus Delayed Etanercept in Rheumatoid Arthritis). VEDERA will recruit 120 patients with early, treatment-naïve RA, randomized to TNFi therapy etanercept (ETN) combined with methotrexate (MTX), or therapy with MTX with or without additional synthetic disease modifying anti-rheumatic drugs with escalation to ETN following a ‘treat-to-target’ regimen. VEDERA patients will be recruited into CADERA and undergo cardiac magnetic resonance (CMR) assessment with; cine imaging, rest/stress adenosine perfusion, tissue-tagging, aortic distensibility, T1 mapping and late gadolinium imaging. Primary objectives are to detect the prevalence and change of cardiovascular abnormalities by CMR between TNFi and standard therapy over a 12-month period. All patients will enter an inflammatory arthritis registry for long-term follow-up. Discussion CADERA is a multi-parametric study describing cardiovascular abnormalities in early, treatment-naïve RA patients, with assessment of changes at one year between early biological therapy and conventional therapy. Trials registration This trial was registered with Current Controlled Trials (registration number: ISRCTN50167738) on 8 November 2013.
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Affiliation(s)
| | | | | | | | | | | | - Sven Plein
- Multidisciplinary Cardiovascular Research Centre & Leeds Institute for Cardiovascular and Metabolic Medicine, Worsley Building, University of Leeds, Clarendon Way, Leeds LS2 9JT, UK.
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Larghat AM, Swoboda PP, Biglands JD, Kearney MT, Greenwood JP, Plein S. The microvascular effects of insulin resistance and diabetes on cardiac structure, function, and perfusion: a cardiovascular magnetic resonance study. Eur Heart J Cardiovasc Imaging 2014; 15:1368-76. [PMID: 25117473 PMCID: PMC4240406 DOI: 10.1093/ehjci/jeu142] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Aims Type 2 diabetes mellitus is an independent risk factor for the development of heart failure. To better understand the mechanism by which this occurs, we investigated cardiac structure, function, and perfusion in patients with and without diabetes. Methods and results Sixty-five patients with no stenosis >30% on invasive coronary angiography were categorized into diabetes (19) and non-diabetes (46) which was further categorized into prediabetes (30) and controls (16) according to the American Diabetes Association guidelines. Each patient underwent comprehensive cardiovascular magnetic resonance assessment. Left-ventricular (LV) mass, relative wall mass (RWM), Lagrangian circumferential strain, LV torsion, and myocardial perfusion reserve (MPR) were calculated. LV mass was higher in diabetics than non-diabetics (112.8 ± 39.7 vs. 91.5 ± 21.3 g, P = 0.01) and in diabetics than prediabetics (112.8 ± 39.7 vs. 90.3 ± 18.7 g, P = 0.02). LV torsion angle was higher in diabetics than non-diabetics (9.65 ± 1.90 vs. 8.59 ± 1.91°, P = 0.047), and MPR was lower in diabetics than non-diabetics (2.10 ± 0.76 vs. 2.84 ± 1.25 mL/g/min, P = 0.01). There was significant correlation between MPR and early diastolic strain rate (r = −0.310, P = 0.01) and LV torsion (r = −0.306, P = 0.01). In multivariable linear regression analysis, non-diabetics waist–hip ratio, but not body mass index, had a significant association with RWM (Beta = 0.34, P = 0.02). Conclusion Patients with diabetes have increased LV mass, LV torsion, and decreased MPR. There is a significant association between decreased MPR and increased LV torsion suggesting a possible mechanistic link between microvascular disease and cardiac dysfunction in diabetes.
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Affiliation(s)
- Abdulghani M Larghat
- Multidisciplinary Cardiovascular Research Centre & Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK Department of Cardiology and Internal Medicine, Tripoli Medical Centre, Faculty of Medicine, University of Tripoli, Tripoli, Libya
| | - Peter P Swoboda
- Multidisciplinary Cardiovascular Research Centre & Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK
| | | | - Mark T Kearney
- Multidisciplinary Cardiovascular Research Centre & Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK
| | - John P Greenwood
- Multidisciplinary Cardiovascular Research Centre & Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK
| | - Sven Plein
- Multidisciplinary Cardiovascular Research Centre & Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK
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Influence of the cardiac cycle on time-intensity curves using multislice dynamic magnetic resonance perfusion. Int J Cardiovasc Imaging 2014; 30:1347-55. [PMID: 24928765 DOI: 10.1007/s10554-014-0466-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 06/07/2014] [Indexed: 10/25/2022]
Abstract
Flow and pressure variations cause potential changes in magnetic resonance imaging (MRI) signal intensity across the cardiac cycle. Nevertheless, cardiac dynamic contrast-enhanced (perfusion) MRI is performed and analyzed regardless of the cardiac phase. We investigate whether the cardiac phase impacts myocardial and left ventricle (LV) cavity time intensity curves (TICs) at rest and during vasodilatation. Fifteen healthy volunteers (seven females, eight males; mean age: 32.5 ± 9.3 years; age range: 19-49 years) were included in this prospective study. They underwent four separate short-axis multislice (apical, mid and basal) LV perfusion MRI, with different electrocardiogram-triggering during normal vasotone and adenosine-stress. TIC parameters were extracted from the myocardium and the LV cavity. General linear mixed model analyses were used to evaluate their variability according to vasotone, cardiac phase and slice-position. Maximal enhancement and normalized Steepest slopes were higher at stress than at rest (p values <0.001). A similar trend towards higher inflow was shown on systole versus diastole in the LV cavity and diastole versus systole in the myocardium (p < 0.05).These TIC parameters were slice-position dependent, as the inflow decreased from the base to the apex in the LV, and peaked on the mid-slice for the myocardium. There are significant variability of both the LV and the myocardial TICs, with respect to the cardiac cycle phase and the slice position where imaging actually takes place. These appeal to measurement standardization for a better intra- and inter-study reproducibility.
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Schwab F, Ingrisch M, Marcus R, Bamberg F, Hildebrandt K, Adrion C, Gliemi C, Nikolaou K, Reiser M, Theisen D. Tracer kinetic modeling in myocardial perfusion quantification using MRI. Magn Reson Med 2014; 73:1206-15. [DOI: 10.1002/mrm.25212] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 02/04/2014] [Accepted: 02/18/2014] [Indexed: 12/21/2022]
Affiliation(s)
- Felix Schwab
- Josef Lissner Laboratory for Biomedical Imaging; Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
- Munich Heart Alliance; Munich Germany
| | - Michael Ingrisch
- Josef Lissner Laboratory for Biomedical Imaging; Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
| | - Roy Marcus
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
| | - Fabian Bamberg
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
- Munich Heart Alliance; Munich Germany
| | - Kristof Hildebrandt
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
| | - Christine Adrion
- Chair of Biometry and Bioinformatics; Institute for Medical Information Sciences, Biometry and Epidemiology, Ludwig-Maximilians-University; Munich Germany
| | | | - Konstantin Nikolaou
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
| | - Maximilian Reiser
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
- Munich Heart Alliance; Munich Germany
| | - Daniel Theisen
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich; Munich Germany
- Munich Heart Alliance; Munich Germany
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Robbers LFHJ, Nijveldt R, Beek AM, Hirsch A, van der Laan AM, Delewi R, van der Vleuten PA, Tio RA, Tijssen JGP, Hofman MBM, Piek JJ, Zijlstra F, van Rossum AC. Cell therapy in reperfused acute myocardial infarction does not improve the recovery of perfusion in the infarcted myocardium: a cardiac MR imaging study. Radiology 2014; 272:113-22. [PMID: 24617731 DOI: 10.1148/radiol.14131121] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE To investigate the effects of cell therapy on myocardial perfusion recovery after treatment of acute myocardial infarction (MI) with primary percutaneous coronary intervention (PCI). MATERIALS AND METHODS In this HEBE trial substudy, which was approved by the institutional review board (trial registry number ISRCTN95796863), the authors assessed the effects of intracoronary infusion with bone marrow-derived mononuclear cells (BMMCs) or peripheral blood-derived mononuclear cells (PBMCs) on myocardial perfusion recovery by using cardiac magnetic resonance (MR) imaging after revascularization. In 152 patients with acute MI treated with PCI, cardiac MR imaging was performed after obtaining informed consent-before randomization to BMMC, PBMC, or standard therapy (control group)-and repeated at 4-month follow-up. Cardiac MR imaging consisted of cine, rest first-pass perfusion, and late gadolinium enhancement imaging. Perfusion was evaluated semiquantitatively with signal intensity-time curves by calculating the relative upslope (percentage signal intensity change). The relative upslope was calculated for the MI core, adjacent border zone, and remote myocardium. Perfusion differences among treatment groups or between baseline and follow-up were assessed with the Wilcoxon signed rank or Mann-Whitney U test. RESULTS At baseline, myocardial perfusion differed between the MI core (median, 6.0%; interquartile range [IQR], 4.1%-8.0%), border zone (median, 8.4%; IQR, 6.4%-10.2%), and remote myocardium (median, 12.2%; IQR, 10.5%-15.9%) (P < .001 for all), with equal distribution among treatment groups. These interregional differences persisted at follow-up (P < .001 for all). No difference in perfusion recovery was found between the three treatment groups for any region. CONCLUSION After revascularization of ST-elevation MI, cell therapy does not augment the recovery of resting perfusion in either the MI core or border zone.
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Affiliation(s)
- Lourens F H J Robbers
- From the Department of Cardiology, VU University Medical Center, Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, the Netherlands (L.F.H.J.R., R.N., A.M.B., M.B.M.H., A.C.v.R.); ICIN-Netherlands Heart Institute (ICIN-NHI), Utrecht, the Netherlands (L.F.H.J.R., R.N., A.H., A.M.v.d.L., R.D., P.A.v.d.V.); Department of Cardiology, Academic Medical Center, Amsterdam, the Netherlands (A.H., A.M.v.d.L., R.D., J.G.P.T., J.J.P.); Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.A.v.d.V., R.A.T.); and Department of Cardiology, Erasmus University Medical Center, Rotterdam, the Netherlands (F.Z.)
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Motwani M, Kidambi A, Sourbron S, Fairbairn TA, Uddin A, Kozerke S, Greenwood JP, Plein S. Quantitative three-dimensional cardiovascular magnetic resonance myocardial perfusion imaging in systole and diastole. J Cardiovasc Magn Reson 2014; 16:19. [PMID: 24565078 PMCID: PMC3941945 DOI: 10.1186/1532-429x-16-19] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 01/29/2014] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Two-dimensional (2D) perfusion cardiovascular magnetic resonance (CMR) remains limited by a lack of complete myocardial coverage. Three-dimensional (3D) perfusion CMR addresses this limitation and has recently been shown to be clinically feasible. However, the feasibility and potential clinical utility of quantitative 3D perfusion measurements, as already shown with 2D-perfusion CMR and positron emission tomography, has yet to be evaluated. The influence of systolic or diastolic acquisition on myocardial blood flow (MBF) estimates, diagnostic accuracy and image quality is also unknown for 3D-perfusion CMR. The purpose of this study was to establish the feasibility of quantitative 3D-perfusion CMR for the detection of coronary artery disease (CAD) and to compare systolic and diastolic estimates of MBF. METHODS Thirty-five patients underwent 3D-perfusion CMR with data acquired at both end-systole and mid-diastole. MBF and myocardial perfusion reserve (MPR) were estimated on a per patient and per territory basis by Fermi-constrained deconvolution. Significant CAD was defined as stenosis ≥70% on quantitative coronary angiography. RESULTS Twenty patients had significant CAD (involving 38 out of 105 territories). Stress MBF and MPR had a high diagnostic accuracy for the detection of CAD in both systole (area under curve [AUC]: 0.95 and 0.92, respectively) and diastole (AUC: 0.95 and 0.94). There were no significant differences in the AUCs between systole and diastole (p values >0.05). At stress, diastolic MBF estimates were significantly greater than systolic estimates (no CAD: 3.21 ± 0.50 vs. 2.75 ± 0.42 ml/g/min, p < 0.0001; CAD: 2.13 ± 0.45 vs. 1.98 ± 0.41 ml/g/min, p < 0.0001); but at rest, there were no significant differences (p values >0.05). Image quality was higher in systole than diastole (median score 3 vs. 2, p = 0.002). CONCLUSIONS Quantitative 3D-perfusion CMR is feasible. Estimates of MBF are significantly different for systole and diastole at stress but diagnostic accuracy to detect CAD is high for both cardiac phases. Better image quality suggests that systolic data acquisition may be preferable.
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Affiliation(s)
- Manish Motwani
- Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK
| | - Ananth Kidambi
- Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK
| | | | - Timothy A Fairbairn
- Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK
| | - Akhlaque Uddin
- Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK
| | - Sebastian Kozerke
- Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland
| | - John P Greenwood
- Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK
| | - Sven Plein
- Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK
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Bratis K, Nagel E. Variability in quantitative cardiac magnetic resonance perfusion analysis. J Thorac Dis 2013; 5:357-9. [PMID: 23825774 DOI: 10.3978/j.issn.2072-1439.2013.06.08] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 06/06/2013] [Indexed: 11/14/2022]
Abstract
By taking advantage of its high spatial resolution, noninvasive and nontoxic nature first-pass perfusion cardiovascular magnetic resonance (CMR) has rendered an indispensable tool for the noninvasive detection of reversible myocardial ischemia. A potential advantage of perfusion CMR is its ability to quantitatively assess perfusion reserve within a myocardial segment, as expressed semi- quantitatively by myocardial perfusion reserve index (MPRI) and fully- quantitatively by absolute myocardial blood flow (MBF). In contrast to the high accuracy and reliability of CMR in evaluating cardiac function and volumes, perfusion CMR is adversely affected by multiple potential reasons during data acquisition as well as post-processing. Various image acquisition techniques, various contrast agents and doses as well as variable blood flow at rest as well as variable reactions to stress all influence the acquired data. Mechanisms underlying the variability in perfusion CMR post processing, as well as their clinical significance, are yet to be fully elucidated. The development of a universal, reproducible, accurate and easily applicable tool in CMR perfusion analysis remains a challenge and will substantially enforce the role of perfusion CMR in improving clinical care.
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Affiliation(s)
- K Bratis
- Division of Imaging Sciences and Biomedical Engineering, King's College London. British Heart Foundation Centre of Excellence, National Institute for Health Research Biomedical Research Centre and Wellcome Trust and Engineering and Physical Sciences Research Council Medical Engineering Centre at Guy's and St Thomas' NHS Foundation Trust, London, UK
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