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Hoshino M, Jukema RA, Pijls N, Hoek R, Raijmakers P, Driessen R, van Diemen P, Twisk J, van der Hoef T, Danad I, Kakuta T, Knaapen P. Microvascular resistance reserve before and after PCI: A serial FFR and [ 15O] H 2O PET study. Atherosclerosis 2024; 395:117555. [PMID: 38702268 DOI: 10.1016/j.atherosclerosis.2024.117555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/03/2024] [Accepted: 04/12/2024] [Indexed: 05/06/2024]
Abstract
BACKGROUND AND AIMS Microvascular Resistance Reserve (MRR) has recently been introduced as a microvasculature-specific index and hypothesized to be independent of coronary stenosis. The aim of this study was to investigate the change of MRR after percutaneous coronary intervention (PCI). METHODS In this post-hoc analysis from the PACIFC trials, symptomatic patients underwent [15O]H2O positron emission tomography (PET) and invasive fractional flow reserve (FFR) before and after revascularization. Coronary flow reserve (CFR) from PET and invasive FFR were used to calculate MRR. RESULTS Among 52 patients (87 % male, age 59.4 ± 9.4 years), 61 vessels with a median FFR of 0.71 (95 % confidence interval: 0.55 to 0.74) and a mean MRR of 3.80 ± 1.23 were included. Following PCI, FFR, hyperemic myocardial blood flow (hMBF) and CFR increased significantly (all p-values ≤0.001). MRR remained unchanged after PCI (3.80 ± 1.23 before PCI versus 3.60 ± 0.97 after PCI; p=0.23). In vessels with a pre-PCI, FFR ≤0.70 pre- and post-PCI MRR were 3.90 ± 1.30 and 3.73 ± 1.14 (p=0.56), respectively. Similar findings were observed for vessels with a FFR between 0.71 and 0.80 (pre-PCI MRR 3.70 ± 1.17 vs. post PCI MRR 3.48 ± 0.76, p=0.19). CONCLUSIONS Our study indicates that MRR, assessed using a hybrid approach of PET and invasive FFR, is independent of the severity of epicardial stenosis. These findings suggest that MRR is a microvasculature-specific parameter.
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Affiliation(s)
- Masahiro Hoshino
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Department of Cardiology, Tsuchiura Kyodo General Hospital, Japan
| | - Ruurt A Jukema
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
| | - Nico Pijls
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands
| | - Roel Hoek
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
| | - Pieter Raijmakers
- Radiology, Nuclear Medicine & PET Research, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
| | - Roel Driessen
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
| | - Pepijn van Diemen
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
| | - Jos Twisk
- Epidemiology & Data Science, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Tim van der Hoef
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands
| | - Ibrahim Danad
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands
| | - Tsunekazu Kakuta
- Department of Cardiology, Tsuchiura Kyodo General Hospital, Japan
| | - Paul Knaapen
- Departments of Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands.
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Pruthi S, Siddiqui E, Smilowitz NR. Beyond Coronary Artery Disease: Assessing the Microcirculation. Rheum Dis Clin North Am 2024; 50:519-533. [PMID: 38942582 DOI: 10.1016/j.rdc.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
Ischemic heart disease (IHD) affects more than 20 million adults in the United States. Although classically attributed to atherosclerosis of the epicardial coronary arteries, nearly half of patients with stable angina and IHD who undergo invasive coronary angiography do not have obstructive epicardial coronary artery disease. Ischemia with nonobstructive coronary arteries is frequently caused by microvascular angina with underlying coronary microvascular dysfunction (CMD). Greater understanding the pathophysiology, diagnosis, and treatment of CMD holds promise to improve clinical outcomes of patients with ischemic heart disease.
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Affiliation(s)
- Sonal Pruthi
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA
| | - Emaad Siddiqui
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA
| | - Nathaniel R Smilowitz
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA; Cardiology Section, Department of Medicine, VA New York Harbor Healthcare System, 423 East 23rd Street, New York, NY 10010, USA; The Leon H. Charney Division of Cardiology, NYU Langone Health, NYU School of Medicine, 423 East 23rd Street, 12-West, New York, NY 10010, USA.
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Minten L, Bennett J, McCutcheon K, Oosterlinck W, Algoet M, Otsuki H, Takahashi K, Fearon WF, Dubois C. Optimization of Absolute Coronary Blood Flow Measurements to Assess Microvascular Function: In Vivo Validation of Hyperemia and Higher Infusion Speeds. Circ Cardiovasc Interv 2024; 17:e013860. [PMID: 38682331 DOI: 10.1161/circinterventions.123.013860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 03/15/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Reliable assessment of coronary microvascular function is essential. Techniques to measure absolute coronary blood flow are promising but need validation. The objectives of this study were: first, to validate the potential of saline infusion to generate maximum hyperemia in vivo. Second, to validate absolute coronary blood flow measured with continuous coronary thermodilution at high (40-50 mL/min) infusion speeds and asses its safety. METHODS Fourteen closed-chest sheep underwent absolute coronary blood flow measurements with increasing saline infusion speeds at different dosages under general anesthesia. An additional 7 open-chest sheep underwent these measurements with epicardial Doppler flow probes. Coronary flows were compared with reactive hyperemia after 45 s of coronary occlusion. RESULTS Twenty milliliters per minute of saline infusion induced a significantly lower hyperemic coronary flow (140 versus 191 mL/min; P=0.0165), lower coronary flow reserve (1.82 versus 3.21; P≤0.0001), and higher coronary resistance (655 versus 422 woods units; P=0.0053) than coronary occlusion. On the other hand, 30 mL/min of saline infusion resulted in hyperemic coronary flow (196 versus 192 mL/min; P=0.8292), coronary flow reserve (2.77 versus 3.21; P=0.1107), and coronary resistance (415 versus 422 woods units; P=0.9181) that were not different from coronary occlusion. Hyperemic coronary flow was 40.7% with 5 mL/min, 40.8% with 10 mL/min, 73.1% with 20 mL/min, 102.3% with 30 mL/min, 99.0% with 40 mL/min, and 98.0% with 50 mL/min of saline infusion when compared with postocclusive hyperemic flow. There was a significant bias toward flow overestimation (Bland-Altman: bias±SD, -73.09±30.52; 95% limits of agreement, -132.9 to -13.27) with 40 to 50 mL/min of saline. Occasionally, ischemic changes resulted in ventricular fibrillation (9.5% with 50 mL/min) at higher infusion rates. CONCLUSIONS Continuous saline infusion of 30 mL/min but not 20 mL/min induced maximal hyperemia. Absolute coronary blood flow measured with saline infusion speeds of 40 to 50 mL/min was not accurate and not safe.
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Affiliation(s)
- Lennert Minten
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Belgium (L.M., J.B., K.M.C., W.O., M.A., C.D.)
- Division of Cardiovascular Medicine, Stanford University, CA (L.M., H.O., K.T., W.F.F.)
| | - Johan Bennett
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Belgium (L.M., J.B., K.M.C., W.O., M.A., C.D.)
- Departments of Cardiovascular Medicine (J.B., C.D.), UZ Leuven, Belgium
| | - Keir McCutcheon
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Belgium (L.M., J.B., K.M.C., W.O., M.A., C.D.)
| | - Wouter Oosterlinck
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Belgium (L.M., J.B., K.M.C., W.O., M.A., C.D.)
- Cardiac Surgery (W.O., M.A.), UZ Leuven, Belgium
| | - Michiel Algoet
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Belgium (L.M., J.B., K.M.C., W.O., M.A., C.D.)
- Cardiac Surgery (W.O., M.A.), UZ Leuven, Belgium
| | - Hisao Otsuki
- Division of Cardiovascular Medicine, Stanford University, CA (L.M., H.O., K.T., W.F.F.)
| | - Kuniaki Takahashi
- Division of Cardiovascular Medicine, Stanford University, CA (L.M., H.O., K.T., W.F.F.)
| | - William F Fearon
- Division of Cardiovascular Medicine, Stanford University, CA (L.M., H.O., K.T., W.F.F.)
- VA Palo Alto Health Care System, CA (W.F.F.)
| | - Christophe Dubois
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Belgium (L.M., J.B., K.M.C., W.O., M.A., C.D.)
- Departments of Cardiovascular Medicine (J.B., C.D.), UZ Leuven, Belgium
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de Vos A, Troost S, Waterschoot A, Pijls N, van ‘t Veer M. Mixing properties of coronary infusion catheters assessed by in vitro experiments and computational fluid dynamics. EUROPEAN HEART JOURNAL. DIGITAL HEALTH 2024; 5:491-501. [PMID: 39081940 PMCID: PMC11284010 DOI: 10.1093/ehjdh/ztae033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 04/05/2024] [Accepted: 04/09/2024] [Indexed: 08/02/2024]
Abstract
Aims Continuous infusion thermodilution is an established technique for the assessment of absolute coronary blood flow and microvascular resistance due to its proven accuracy and reproducibility. However, for this technique to yield reliable measurements, direct and homogenous mixing of injected saline and blood is mandatory. This study aimed to assess and compare the mixing properties of two different microcatheters, namely the Rayflow® (with sideholes for infusion) and the Finecross® catheter (single end-hole for infusion), which are commonly used in the catheterization laboratory. Methods and results The study employed three different methods to evaluate the mixing properties of the catheters. Firstly, a qualitative assessment of mixing was performed using ink injections in an in vitro bench model of a coronary artery. Secondly, in analogy to the human catheterization laboratory, mixing properties over the length of the coronary artery were assessed semi-quantitatively by temperature measurements in the bench model. Lastly, a quantitative assessment was performed by 3D computational fluid dynamics, where the standard deviation and entropy ratio of the temperature over the cross-section in the coronary artery model were calculated for both catheters. Conclusion All three evaluation methods demonstrated that the Rayflow catheter's specific design leads to a more optimal, homogeneous mixture of blood and saline over both the cross-section and length of a coronary vessel, as compared with the standard end-hole catheter.
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Affiliation(s)
- Annemiek de Vos
- Department of Cardiology, Catharina Hospital, Eindhoven, The Netherlands
| | - Sophie Troost
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | | | - Nico Pijls
- Department of Cardiology, Catharina Hospital, Eindhoven, The Netherlands
| | - Marcel van ‘t Veer
- Department of Cardiology, Catharina Hospital, Eindhoven, The Netherlands
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
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Wang D, Li X, Feng W, Zhou H, Peng W, Wang X. Diagnostic and prognostic value of angiography-derived index of microvascular resistance: a systematic review and meta-analysis. Front Cardiovasc Med 2024; 11:1360648. [PMID: 38685980 PMCID: PMC11057370 DOI: 10.3389/fcvm.2024.1360648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/02/2024] [Indexed: 05/02/2024] Open
Abstract
Background The angiography-derived index of microvascular resistance (A-IMR) is a novel tool for diagnosing coronary microvascular dysfunction (CMD) addressing limitation of unavailability. However, the clinical value of A-IMR remains controversial. Methods A systematic review and meta-analysis was conducted. PubMed, EMBASE, Cochrane Library and Web of Science were searched for relevant studies. Studies that reported estimates of A-IMR's diagnostic accuracy (with thermodilution-based IMR as the reference test) and/or predictions of adverse cardiovascular events were selected. Pooled sensitivity, specificity, area under the summary receiver operating characteristic curve (sROC) were calculated to measure diagnostic performance; pooled hazard/risk ratio (HR/RR) and 95% confidence interval (95% CI) of major adverse cardiovascular events (MACE) or other independent adverse events were calculated to measure prognostic effect. This study was registered with PROSPERO (CRD42023451884). Results A total of 12 diagnostic studies pooling 1,642 vessels and 12 prognostic studies pooling 2,790 individuals were included. A-IMR yielded an area under sROC of 0.93 (95% CI: 0.91, 0.95), a pooled sensitivity of 0.85 (95% CI: 0.79, 0.89) and a pooled specificity of 0.89 (95% CI: 0.83, 0.93) for the diagnosis of CMD. CMD diagnosed using A-IMR was associated with higher risks of MACE (HR, 2.73, 95% CI: 2.16, 3.45), CV death (RR, 2.39, 95% CI: 1.49, 3.82) and heart failure hospitalization (HR, 2.30, 95% CI: 1.53, 3.45). Conclusion A-IMR demonstrated high diagnostic accuracy for CMD and showed a strong prognostic capability in predicting the risk of adverse CV outcomes. Systematic Review Registration https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42023451884, PROSPERO (CRD42023451884).
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Affiliation(s)
- Dayang Wang
- Cardiovascular Institute, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
- Second Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaoming Li
- Center of Intervention, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Wei Feng
- Cardiovascular Institute, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Hufang Zhou
- Cardiovascular Institute, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
- Second Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Wenhua Peng
- Second Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Xian Wang
- Second Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
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Sakai K, Storozhenko T, Mizukami T, Ohashi H, Bouisset F, Tajima A, van Hoe L, Gallinoro E, Botti G, Mahendiran T, Pardaens S, Brouwers S, Fawaz S, Keeble TR, Davies JR, Sonck J, De Bruyne B, Collet C. Impact of vessel volume on thermodilution measurements in patients with coronary microvascular dysfunction. Catheter Cardiovasc Interv 2024. [PMID: 38566527 DOI: 10.1002/ccd.31020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/05/2024] [Accepted: 03/19/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Two invasive methods are available to estimate microvascular resistance: bolus and continuous thermodilution. Comparative studies have revealed a lack of concordance between measurements of microvascular resistance obtained through these techniques. AIMS This study aimed to examine the influence of vessel volume on bolus thermodilution measurements. METHODS We prospectively included patients with angina with non-obstructive coronary arteries (ANOCA) undergoing bolus and continuous thermodilution assessments. All patients underwent coronary CT angiography to extract vessel volume. Coronary microvascular dysfunction was defined as coronary flow reserve (CFR) < 2.0. Measurements of absolute microvascular resistance (in Woods units) and index of microvascular resistance (IMR) were compared before and after volumetric adjustment. RESULTS Overall, 94 patients with ANOCA were included in this study. The mean age was 64.7 ± 10.8 years, 48% were female, and 19% had diabetes. The prevalence of CMD was 16% based on bolus thermodilution, while continuous thermodilution yielded a prevalence of 27% (Cohen's Kappa 0.44, 95% CI 0.23-0.65). There was no correlation in microvascular resistance between techniques (r = 0.17, 95% CI -0.04 to 0.36, p = 0.104). The adjustment of IMR by vessel volume significantly increased the agreement with absolute microvascular resistance derived from continuous thermodilution (r = 0.48, 95% CI 0.31-0.63, p < 0.001). CONCLUSIONS In patients with ANOCA, invasive methods based on coronary thermodilution yielded conflicting results for the assessment of CMD. Adjusting IMR with vessel volume improved the agreement with continuous thermodilution for the assessment of microvascular resistance. These findings strongly suggest the importance of considering vessel volume when interpreting bolus thermodilution assessment.
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Affiliation(s)
- Koshiro Sakai
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Department of Medicine, Division of Cardiology, Showa University School of Medicine, Tokyo, Japan
| | - Tatyana Storozhenko
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Department of Prevention and Treatment of Emergency Conditions, L.T. Malaya Therapy National Institute NAMSU, Kharkiv, Ukraine
| | - Takuya Mizukami
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Division of Clinical Pharmacology, Department of Pharmacology, Showa University, Tokyo, Japan
- Department of Cardiovascular Medicine, Gifu Heart Center, Gifu, Japan
| | - Hirofumi Ohashi
- Department of Cardiology, Aichi Medical University, Aichi, Japan
| | - Frederic Bouisset
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Department of Cardiology, Toulouse University Hospital, Toulouse, France
| | - Atomu Tajima
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Department of Cardiology, Aichi Medical University, Aichi, Japan
| | | | - Emanuele Gallinoro
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Giulia Botti
- Interventional Cardiology Unit, IRCCS Ospedale San Raffaele, Milan, Italy
| | | | | | - Sofie Brouwers
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Department of Experimental Pharmacology, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Samer Fawaz
- Essex Cardiothoracic Centre, Mid and South Essex NHS Foundation Trust, Basildon, UK
- MTRC, Anglia Ruskin School of Medicine, Chelmsford, Essex, UK
| | - Thomas R Keeble
- Essex Cardiothoracic Centre, Mid and South Essex NHS Foundation Trust, Basildon, UK
- MTRC, Anglia Ruskin School of Medicine, Chelmsford, Essex, UK
| | - John R Davies
- Essex Cardiothoracic Centre, Mid and South Essex NHS Foundation Trust, Basildon, UK
- MTRC, Anglia Ruskin School of Medicine, Chelmsford, Essex, UK
| | - Jeroen Sonck
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
- Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
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Fawaz S, Marin F, Khan SA, F G Simpson R, Kotronias RA, Chai J, Acute Myocardial Infarction (OxAMI) Study Investigators O, Al-Janabi F, Jagathesan R, Konstantinou K, Mohdnazri SR, Clesham GJ, Tang KH, Cook CM, Channon KM, Banning AP, Davies JR, V Karamasis G, De Maria GL, Keeble TR. Comparison of bolus versus continuous thermodilution derived indices of microvascular dysfunction in revascularized coronary syndromes. IJC HEART & VASCULATURE 2024; 51:101374. [PMID: 38496256 PMCID: PMC10940925 DOI: 10.1016/j.ijcha.2024.101374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 02/22/2024] [Indexed: 03/19/2024]
Abstract
Background The assessment of coronary microvascular dysfunction (CMD) using invasive methods is a field of growing interest, however the preferred method remains debated. Bolus and continuous thermodilution are commonly used methods, but weak agreement has been observed in patients with angina with non-obstructive coronary arteries (ANOCA). This study examined their agreement in revascularized acute coronary syndromes (ACS) and chronic coronary syndromes (CCS) patients. Objective To compare bolus thermodilution and continuous thermodilution indices of CMD in revascularized ACS and CCS patients and assess their diagnostic agreement at pre-defined cut-off points. Methods Patients from two centers underwent paired bolus and continuous thermodilution assessments after revascularization. CMD indices were compared between the two methods and their agreements at binary cut-off points were assessed. Results Ninety-six patients and 116 vessels were included. The mean age was 64 ± 11 years, and 20 (21 %) were female. Overall, weak correlations were observed between the Index of Microcirculatory Resistance (IMR) and continuous thermodilution microvascular resistance (Rµ) (rho = 0.30p = 0.001). The median coronary flow reserve (CFR) from continuous thermodilution (CFRcont) and bolus thermodilution (CFRbolus) were 2.19 (1.76-2.67) and 2.55 (1.50-3.58), respectively (p < 0.001). Weak correlation and agreement were observed between CFRcont and CFRbolus (rho = 0.37, p < 0.001, ICC 0.228 [0.055-0.389]). When assessed at CFR cut-off values of 2.0 and 2.5, the methods disagreed in 41 (35 %) and 45 (39 %) of cases, respectively. Conclusions There is a significant difference and weak agreement between bolus and continuous thermodilution-derived indices, which must be considered when diagnosing CMD in ACS and CCS patients.
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Affiliation(s)
- Samer Fawaz
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
| | - Federico Marin
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - Sarosh A Khan
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
| | - Rupert F G Simpson
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
| | - Rafail A Kotronias
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - Jason Chai
- Attikon University Hospital, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - Oxford Acute Myocardial Infarction (OxAMI) Study Investigators
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - Firas Al-Janabi
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
| | - Rohan Jagathesan
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
| | - Klio Konstantinou
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
| | - Shah R Mohdnazri
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
| | - Gerald J Clesham
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
| | - Kare H Tang
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
| | - Christopher M Cook
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
| | - Keith M Channon
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - Adrian P Banning
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - John R Davies
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
| | - Grigoris V Karamasis
- Attikon University Hospital, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Giovanni L De Maria
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, U.K
| | - Thomas R Keeble
- Essex Cardiothoracic Centre, Mid and South Essex NHS Hospitals Trust, Basildon, SS16 5NL, United Kingdom
- Department of Circulatory Health Research, Anglia Ruskin University, Chelmsford, CM1 1SQ, United Kingdom
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Cho MO, Kim S, Back S, Jang W, Choi JH, Kang B, Lim SH. Monolithic Integration of Ultraslim Flow Sensor and Medical Guidewire by Laser Filament Scanning Sintering for In Vivo Diagnostics of Cardiovascular Diseases. ACS Sens 2024; 9:602-614. [PMID: 38060197 DOI: 10.1021/acssensors.3c01262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
In this study, an ultraslim thermal flow sensor system integrated onto a 340 μm diameter medical guidewire was developed using a laser filament scanning sintering method for the early diagnosis of cardiovascular diseases. The proposed system is a calorimetric-based micro thermal flow sensor comprising a microheater and two thermistors. Prior to fabrication, the sensor design was optimized through flow simulation, and the patterned sensor was successfully implemented on a thin and curved surface of the medical guidewire using a laser patterning method with Ag nanoparticles. The performance of the ultraslim thermal flow sensor-on-guidewire system (SoW) was evaluated under pulsatile flow by using an artificial heartbeat simulator with differentially induced fluid flow velocities of up to 60 cm/s. The resulting electrical signals generated by the temperature difference between the two thermistors caused by the fluid flow were measured across different velocity ranges. Based on the obtained data, a calibration curve was derived to establish the relationship between the fluid velocity and the sensor output voltage. Furthermore, the SoW was tested on living animals, whereby the measured blood flow velocities were 60-90 cm/s in the left coronary artery of pigs. This research demonstrates the potential of ultraslim microsensors, such as the developed thermal flow sensor system, for various industries, particularly in the medical field.
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Affiliation(s)
- Myoung-Ock Cho
- Department of Mechanical Systems Engineering, Graduate School, Kookmin University, Seoul 02707, Korea
| | - Sunyoung Kim
- Department of Mechanical Systems Engineering, Graduate School, Kookmin University, Seoul 02707, Korea
| | - Seunghyun Back
- Department of Mechanical Systems Engineering, Graduate School, Kookmin University, Seoul 02707, Korea
| | - Woojin Jang
- Department of Mechanical Systems Engineering, Graduate School, Kookmin University, Seoul 02707, Korea
| | - Jin-Ho Choi
- Department of Emergency Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwonro, Gangnamgu, Seoul 06351, Republic of Korea
| | - Bongchul Kang
- Kookmin University, School of Mechanical Engineering, Kookmin University, Seoul 02707, Korea
| | - Si-Hyung Lim
- Kookmin University, School of Mechanical Engineering, Kookmin University, Seoul 02707, Korea
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9
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Belmonte M, Gallinoro E, Pijls NHJ, Bertolone DT, Keulards DCJ, Viscusi MM, Storozhenko T, Mizukami T, Mahendiran T, Seki R, Fournier S, de Vos A, Adjedj J, Barbato E, Sonck J, Damman P, Keeble T, Fawaz S, Gutiérrez-Barrios A, Paradies V, Bouisset F, Kern MJ, Fearon WF, Collet C, De Bruyne B. Measuring Absolute Coronary Flow and Microvascular Resistance by Thermodilution: JACC Review Topic of the Week. J Am Coll Cardiol 2024; 83:699-709. [PMID: 38325996 DOI: 10.1016/j.jacc.2023.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 12/01/2023] [Indexed: 02/09/2024]
Abstract
Diagnosing coronary microvascular dysfunction remains challenging, primarily due to the lack of direct measurements of absolute coronary blood flow (Q) and microvascular resistance (Rμ). However, there has been recent progress with the development and validation of continuous intracoronary thermodilution, which offers a simplified and validated approach for clinical use. This technique enables direct quantification of Q and Rμ, leading to precise and accurate evaluation of the coronary microcirculation. To ensure consistent and reliable results, it is crucial to follow a standardized protocol when performing continuous intracoronary thermodilution measurements. This document aims to summarize the principles of thermodilution-derived absolute coronary flow measurements and propose a standardized method for conducting these assessments. The proposed standardization serves as a guide to ensure the best practice of the method, enhancing the clinical assessment of the coronary microcirculation.
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Affiliation(s)
- Marta Belmonte
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy
| | - Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Cardiology Department, Galeazzi-Sant'Ambrogio Hospital, Milan, Italy
| | - Nico H J Pijls
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands.
| | | | - Danielle C J Keulards
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands; Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Michele Mattia Viscusi
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy
| | | | | | - Thabo Mahendiran
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | - Ruiko Seki
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Stephane Fournier
- Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | - Annemiek de Vos
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands; Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Julien Adjedj
- Department of Cardiology, Institut Arnault Tzanck, Saint-Laurent-du-Var, France
| | - Emanuele Barbato
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Jeroen Sonck
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Peter Damman
- Department of Cardiology, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Thomas Keeble
- Essex Cardiothoracic Centre, Mid South Essex NHS Foundation Trust, Basildon, Essex, United Kingdom; Medical Technology Research Centre, Anglia Ruskin School of Medicine, Chelmsford, Essex, United Kingdom
| | - Samer Fawaz
- Essex Cardiothoracic Centre, Mid South Essex NHS Foundation Trust, Basildon, Essex, United Kingdom; Medical Technology Research Centre, Anglia Ruskin School of Medicine, Chelmsford, Essex, United Kingdom
| | - Alejandro Gutiérrez-Barrios
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, Cádiz, Spain
| | - Valeria Paradies
- Department of Cardiology, Maasstad Hospital, Rotterdam, the Netherlands
| | | | - Morton J Kern
- Veteran's Administration Long Beach Health Care System, Long Beach, California, USA
| | - William F Fearon
- Department of Medicine, Division of Cardiology, Stanford Medical Center Palo Alto, Palo Alto, California, USA; VA Palo Alto Health Care System, Palo Alto, California, USA
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland.
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10
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Pruthi S, Siddiqui E, Smilowitz NR. Beyond Coronary Artery Disease: Assessing the Microcirculation. Cardiol Clin 2024; 42:125-135. [PMID: 37949533 PMCID: PMC11090694 DOI: 10.1016/j.ccl.2023.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Ischemic heart disease (IHD) affects more than 20 million adults in the United States. Although classically attributed to atherosclerosis of the epicardial coronary arteries, nearly half of patients with stable angina and IHD who undergo invasive coronary angiography do not have obstructive epicardial coronary artery disease. Ischemia with nonobstructive coronary arteries is frequently caused by microvascular angina with underlying coronary microvascular dysfunction (CMD). Greater understanding the pathophysiology, diagnosis, and treatment of CMD holds promise to improve clinical outcomes of patients with ischemic heart disease.
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Affiliation(s)
- Sonal Pruthi
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA
| | - Emaad Siddiqui
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA
| | - Nathaniel R Smilowitz
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA; Cardiology Section, Department of Medicine, VA New York Harbor Healthcare System, 423 East 23rd Street, New York, NY 10010, USA; The Leon H. Charney Division of Cardiology, NYU Langone Health, NYU School of Medicine, 423 East 23rd Street, 12-West, New York, NY 10010, USA.
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11
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Fawaz S, Munhoz D, Mahendiran T, Gallinoro E, Mizukami T, Khan SA, Simpson RFG, Svanerud J, Cook CM, Davies JR, Karamasis GV, De Bruyne B, Keeble TR. Assessing the Impact of Prolonged Averaging of Coronary Continuous Thermodilution Traces. Diagnostics (Basel) 2024; 14:285. [PMID: 38337801 PMCID: PMC10855808 DOI: 10.3390/diagnostics14030285] [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: 11/10/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 02/12/2024] Open
Abstract
Continuous Thermodilution is a novel method of quantifying coronary flow (Q) in mL/min. To account for variability of Q within the cardiac cycle, the trace is smoothened with a 2 s moving average filter. This can sometimes be ineffective due to significant heart rate variability, ventricular extrasystoles, and deep inspiration, resulting in a fluctuating temperature trace and ambiguity in the location of the "steady state". This study aims to assess whether a longer moving average filter would smoothen any fluctuations within the continuous thermodilution traces resulting in improved interpretability and reproducibility on a test-retest basis. Patients with ANOCA underwent repeat continuous thermodilution measurements. Analysis of traces were performed at averages of 10, 15, and 20 s to determine the maximum acceptable average. The maximum acceptable average was subsequently applied as a moving average filter and the traces were re-analysed to assess the practical consequences of a longer moving average. Reproducibility was then assessed and compared to a 2 s moving average. Of the averages tested, only 10 s met the criteria for acceptance. When the data was reanalysed with a 10 s moving average filter, there was no significant improvement in reproducibility, however, it resulted in a 12% diagnostic mismatch. Applying a longer moving average filter to continuous thermodilution data does not improve reproducibility. Furthermore, it results in a loss of fidelity on the traces, and a 12% diagnostic mismatch. Overall, current practice should be maintained.
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Affiliation(s)
- Samer Fawaz
- Essex Cardiothoracic Centre, Basildon Hospital, Nether Mayne, Basildon SS16 5NL, UK
- Medical Technology Research Centre (MTRC), Anglia-Ruskin University, Chelmsford CM1 1SQ, UK
| | - Daniel Munhoz
- Cardiovascular Center Aalst, OLV Clinic, 9300 Aalst, Belgium
- Department of Advanced Biomedical Sciences, University Federico II, 80138 Naples, Italy
| | - Thabo Mahendiran
- Cardiovascular Center Aalst, OLV Clinic, 9300 Aalst, Belgium
- Lausanne University Hospital, 1005 Lausanne, Switzerland
| | - Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV Clinic, 9300 Aalst, Belgium
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20157 Milan, Italy
| | - Takuya Mizukami
- Cardiovascular Center Aalst, OLV Clinic, 9300 Aalst, Belgium
- Division of Clinical Pharmacology, Department of Pharmacology, Showa University, Tokyo 142-0064, Japan
| | - Sarosh A. Khan
- Essex Cardiothoracic Centre, Basildon Hospital, Nether Mayne, Basildon SS16 5NL, UK
- Medical Technology Research Centre (MTRC), Anglia-Ruskin University, Chelmsford CM1 1SQ, UK
| | - Rupert F. G. Simpson
- Essex Cardiothoracic Centre, Basildon Hospital, Nether Mayne, Basildon SS16 5NL, UK
- Medical Technology Research Centre (MTRC), Anglia-Ruskin University, Chelmsford CM1 1SQ, UK
| | | | - Christopher M. Cook
- Essex Cardiothoracic Centre, Basildon Hospital, Nether Mayne, Basildon SS16 5NL, UK
- Medical Technology Research Centre (MTRC), Anglia-Ruskin University, Chelmsford CM1 1SQ, UK
| | - John R. Davies
- Essex Cardiothoracic Centre, Basildon Hospital, Nether Mayne, Basildon SS16 5NL, UK
- Medical Technology Research Centre (MTRC), Anglia-Ruskin University, Chelmsford CM1 1SQ, UK
| | - Grigoris V. Karamasis
- School of Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, 157 72 Athens, Greece
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV Clinic, 9300 Aalst, Belgium
- Lausanne University Hospital, 1005 Lausanne, Switzerland
| | - Thomas R. Keeble
- Essex Cardiothoracic Centre, Basildon Hospital, Nether Mayne, Basildon SS16 5NL, UK
- Medical Technology Research Centre (MTRC), Anglia-Ruskin University, Chelmsford CM1 1SQ, UK
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12
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Paolisso P, Gallinoro E, Belmonte M, Bertolone DT, Bermpeis K, De Colle C, Shumkova M, Leone A, Caglioni S, Esposito G, Fabbricatore D, Moya A, Delrue L, Penicka M, De Bruyne B, Barbato E, Bartunek J, Vanderheyden M. Coronary Microvascular Dysfunction in Patients With Heart Failure: Characterization of Patterns in HFrEF Versus HFpEF. Circ Heart Fail 2024; 17:e010805. [PMID: 38108151 DOI: 10.1161/circheartfailure.123.010805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/18/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Coronary microvascular dysfunction (CMD) is involved in heart failure (HF) onset and progression, independently of HF phenotype and obstructive coronary artery disease. Invasive assessment of CMD might provide insights into phenotyping and prognosis of patients with HF. We aimed to assess absolute coronary flow, absolute microvascular resistance, myocardial perfusion, coronary flow reserve, and microvascular resistance reserve in patients with HF with preserved ejection fraction and HF with reduced ejection fraction (HFrEF). METHODS Single-center, prospective study of 56 consecutive patients with de novo HF with nonobstructive coronary artery disease divided into HF with preserved ejection fraction (n=21) and HFrEF (n=35). CMD was invasively assessed by continuous intracoronary thermodilution and defined as coronary flow reserve <2.5. Left ventricular and left anterior descending artery-related myocardial mass was quantified by echocardiography and coronary computed tomography angiography. Myocardial perfusion (mL/min per g) was calculated as the ratio between absolute coronary flow and left anterior descending artery-related mass. RESULTS Patients with HFrEF showed a higher left ventricular and left anterior descending artery-related myocardial mass compared with HF with preserved ejection fraction (P<0.010). Overall, 52% of the study population had CMD, with a similar prevalence between the 2 groups. In HFrEF, CMD was characterized by lower absolute microvascular resistance and higher absolute coronary flow at rest (functional CMD; P=0.002). CMD was an independent predictor of a lower rate of left ventricular reverse remodeling at follow-up. In patients with HF with preserved ejection fraction, CMD was mainly due to higher absolute microvascular resistance and lower absolute coronary flow during hyperemia (structural CMD; P≤0.030). CONCLUSIONS Continuous intracoronary thermodilution allows the definition and characterization of patterns with distinct CMD in patients with HF and could identify patients with HFrEF with a higher rate of left ventricular reverse remodeling at follow-up.
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Affiliation(s)
- Pasquale Paolisso
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Cardiology Unit, Galeazzi-Sant'Ambrogio Hospital, Scientific Institute for Research, Hospitalization, and Health Care (IRCCS), Milan, Italy (E.G.)
| | - Marta Belmonte
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Dario Tino Bertolone
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Konstantinos Bermpeis
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
| | - Cristina De Colle
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Monika Shumkova
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
| | - Attilio Leone
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Serena Caglioni
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Italy (S.C.)
| | - Giuseppe Esposito
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Davide Fabbricatore
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (P.P., M.B., D.T.B., C.D.C., A.L., G.E., D.F.)
| | - Ana Moya
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
| | - Leen Delrue
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
| | - Martin Penicka
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
- Department of Cardiology, Lausanne University Hospital, Switzerland (B.D.B.)
| | - Emanuele Barbato
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Italy (E.B.)
| | - Jozef Bartunek
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
| | - Marc Vanderheyden
- Cardiovascular Center Aalst, OLV Hospital, Belgium (P.P., E.G., M.B., D.T.B., K.B., C.D.C., M.S., A.L., G.E., D.F., A.M., L.D., M.P., B.D.B., J.B., M.V.)
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13
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Ciaramella L, Di Serafino L, Mitrano L, De Rosa ML, Carbone C, Rea FS, Monaco S, Scalamogna M, Cirillo P, Esposito G. Invasive Assessment of Coronary Microcirculation: A State-of-the-Art Review. Diagnostics (Basel) 2023; 14:86. [PMID: 38201395 PMCID: PMC10795746 DOI: 10.3390/diagnostics14010086] [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: 12/01/2023] [Revised: 12/28/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
A significant proportion of patients presenting with signs and symptoms of myocardial ischemia have no "significant" epicardial disease; thereby, the assessment of coronary microcirculation gained an important role in improving diagnosis and guiding therapy. In fact, coronary microvascular dysfunction (CMD) could be found in a large proportion of these patients, supporting both symptoms and signs of myocardial ischemia. However, CMD represents a diagnostic challenge for two main reasons: (1) the small dimension of the coronary microvasculature prevents direct angiographic visualization, and (2) despite the availability of specific diagnostic tools, they remain invasive and underused in the current clinical practice. For these reasons, CMD remains underdiagnosed, and most of the patients remain with no specific treatment and quality-of-life-limiting symptoms. Of note, recent evidence suggests that a "full physiology" approach for the assessment of the whole coronary vasculature may offer a significant benefit in terms of symptom improvement among patients presenting with ischemia and non-obstructive coronary artery disease. We analyze the pathophysiology of coronary microvascular dysfunction, providing the readers with a guide for the invasive assessment of coronary microcirculation, together with the available evidence supporting its use in clinical practice.
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Affiliation(s)
| | - Luigi Di Serafino
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Via Pansini 5, 80131 Naples, Italy; (L.C.); (L.M.); (M.L.D.R.); (C.C.); (F.S.R.); (S.M.); (M.S.); (P.C.); (G.E.)
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14
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Chen W, Ni M, Huang H, Cong H, Fu X, Gao W, Yang Y, Yu M, Song X, Liu M, Yuan Z, Zhang B, Wang Z, Wang Y, Chen Y, Zhang C, Zhang Y. Chinese expert consensus on the diagnosis and treatment of coronary microvascular diseases (2023 Edition). MedComm (Beijing) 2023; 4:e438. [PMID: 38116064 PMCID: PMC10729292 DOI: 10.1002/mco2.438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/11/2023] [Accepted: 11/16/2023] [Indexed: 12/21/2023] Open
Abstract
Since the four working groups of the Chinese Society of Cardiology issued first expert consensus on coronary microvascular diseases (CMVD) in 2017, international consensus documents on CMVD have increased rapidly. Although some of these documents made preliminary recommendations for the diagnosis and treatment of CMVD, they did not provide classification of recommendations and levels of evidence. In order to summarize recent progress in the field of CMVD, standardize the methods and procedures of diagnosis and treatment, and identify the scientific questions for future research, the four working groups of the Chinese Society of Cardiology updated the 2017 version of the Chinese expert consensus on CMVD and adopted a series of measures to ensure the quality of this document. The current consensus has raised a new classification of CMVD, summarized new epidemiological findings for different types of CMVD, analyzed key pathological and molecular mechanisms, evaluated classical and novel diagnostic technologies, recommended diagnostic pathways and criteria, and therapeutic strategies and medications, for patients with CMVD. In view of the current progress and knowledge gaps of CMVD, future directions were proposed. It is hoped that this expert consensus will further expedite the research progress of CMVD in both basic and clinical scenarios.
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Affiliation(s)
- Wenqiang Chen
- The National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical ScienceDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandongChina
| | - Mei Ni
- The National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical ScienceDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandongChina
| | - He Huang
- Department of CardiologySir Run Run Shaw Hospital affiliated with Zhejiang University School of MedicineHangzhouChina
| | - Hongliang Cong
- Department of CardiologyTianjin Chest Hospital, Tianjin UniversityTianjinChina
| | - Xianghua Fu
- Department of CardiologyThe Second Hospital of Hebei Medical UniversityShijiazhuangHebeiChina
| | - Wei Gao
- Department of CardiologyPeking University Third HospitalBeijingChina
| | - Yuejin Yang
- Department of CardiologyFuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Mengyue Yu
- Department of CardiologyFuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Xiantao Song
- Department of CardiologyBeijing Anzhen Hospital, Capital Medical UniversityBeijingChina
| | - Meilin Liu
- Department of GeriatricsPeking University First HospitalBeijingChina
| | - Zuyi Yuan
- Department of CardiologyThe First Affiliated Hospital of Xian Jiaotong UniversityXianChina
| | - Bo Zhang
- Department of CardiologyFirst Affiliated Hospital, Dalian Medical UniversityDalianLiaoningChina
| | - Zhaohui Wang
- Department of CardiologyUnion Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Yan Wang
- Department of CardiologyXiamen Cardiovascular Hospital, Xiamen UniversityXiamenChina
| | - Yundai Chen
- Senior Department of Cardiology, Sixth Medical Center of Chinese PLA General Hospital, Beijing, China; for the Basic Research Group, Atherosclerosis and Coronary Heart Disease Group, Interventional Cardiology Group, and Women's Heart Health Group of the Chinese Society of Cardiology
| | - Cheng Zhang
- The National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical ScienceDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandongChina
| | - Yun Zhang
- The National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical ScienceDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandongChina
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15
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Krakauer M, Ismail A, Talleruphuus U, Henriksen AC, Lonsdale MN, Rasmussen IL, Fuglsang S, Prescott E, Hovind P, Marner L. 82Rb and [ 15O]H 2O myocardial perfusion PET imaging: a prospective head to head comparison. J Nucl Cardiol 2023; 30:2790-2802. [PMID: 37789106 PMCID: PMC10682292 DOI: 10.1007/s12350-023-03372-7] [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: 05/13/2023] [Accepted: 08/15/2023] [Indexed: 10/05/2023]
Abstract
BACKGROUND 82Rb PET and [15O]H2O PET are both validated tracers for myocardical perfusion imaging but have not previously been compared clinically. During our site's transition from 82Rb to [15O]H2O PET, we performed a head-to-head comparison in a mixed population with suspected ischemic heart disease. METHODS A total of 37 patients referred for perfusion imaging due to suspicion of coronary stenosis were examined with both 82Rb and [15O]H2O PET on the same day in rest and during adenosine-induced stress. The exams were rated by two blinded readers as normal, regional ischemia, globally reduced myocardial perfusion, or myocardial scarring. For [15O]H2O PET, regional ischemia was defined as two neighboring segments with average stress perfusion ≤ 2.3 mL/(min·g). Further, we evaluated a total perfusion deficit (TPD) of ≥ 10% as a more conservative marker of ischemia. RESULTS [15O]H2O PET identified more patients with regional ischemia: 17(46%) vs 9(24%), agreement: 59% corresponding to a Cohen's kappa of .31 [95%CI .08-.53], (P < .001). Using the more conservative TPD ≥ 10%, the agreement increased to 86% corresponding to a kappa of .62 [95%CI .33-.92], (P = .001). For the subgroup of patients with no known heart disease (n = 18), the agreement was 94%. Interrater agreement was 95% corresponding to a kappa of .89 [95%CI .74-1.00] (P < .001). CONCLUSIONS In clinical transition from 82Rb to [15O]H2O PET, it is important to take into account the higher frequency of patients with regional ischemia detected by [15O]H2O PET.
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Affiliation(s)
- Martin Krakauer
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Afefah Ismail
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Ulrik Talleruphuus
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Alexander Cuculiza Henriksen
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Markus N Lonsdale
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Inge Lise Rasmussen
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Stefan Fuglsang
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Eva Prescott
- Department of Cardiology, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Peter Hovind
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Lisbeth Marner
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark.
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.
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16
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Gallinoro E, Bertolone DT, Mizukami T, Paolisso P, Bermpeis K, Munhoz D, Sakai K, Seki R, Ohashi H, Esposito G, Caglioni S, Mileva N, Leone A, Candreva A, Belmonte M, Storozhenko T, Viscusi MM, Vanderheyden M, Wyffels E, Bartunek J, Sonck J, Barbato E, Collet C, De Bruyne B. Continuous vs Bolus Thermodilution to Assess Microvascular Resistance Reserve. JACC Cardiovasc Interv 2023; 16:2767-2777. [PMID: 38030361 DOI: 10.1016/j.jcin.2023.09.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/14/2023] [Accepted: 09/19/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND Coronary flow reserve (CFR) and microvascular resistance reserve (MRR) can, in principle, be derived by any method assessing coronary flow. OBJECTIVES The aim of this study was to compare CFR and MRR as derived by continuous (CFRcont and MRRcont) and bolus thermodilution (CFRbolus and MRRbolus). METHODS A total of 175 patients with chest pain and nonobstructive coronary artery disease were studied. Bolus and continuous thermodilution measurements were performed in the left anterior descending coronary artery. MRR was calculated as the ratio of CFR to fractional flow reserve and corrected for changes in systemic pressure. In 102 patients, bolus and continuous thermodilution measurements were performed in duplicate to assess test-retest reliability. RESULTS Mean CFRbolus was higher than CFRcont (3.47 ± 1.42 and 2.67 ± 0.81 [P < 0.001], mean difference 0.80, upper limit of agreement 3.92, lower limit of agreement -2.32). Mean MRRbolus was also higher than MRRcont (4.40 ± 1.99 and 3.22 ± 1.02 [P < 0.001], mean difference 1.2, upper limit of agreement 5.08, lower limit of agreement -2.71). The correlation between CFR and MRR values obtained using both methods was significant but weak (CFR, r = 0.28 [95% CI: 0.14-0.41]; MRR, r = 0.26 [95% CI: 0.16-0.39]; P < 0.001 for both). The precision of both CFR and MRR was higher when assessed using continuous thermodilution compared with bolus thermodilution (repeatability coefficients of 0.89 and 2.79 for CFRcont and CFRbolus, respectively, and 1.01 and 3.05 for MRRcont and MRRbolus, respectively). CONCLUSIONS Compared with bolus thermodilution, continuous thermodilution yields lower values of CFR and MRR accompanied by an almost 3-fold reduction of the variability in the measured results.
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Affiliation(s)
- Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Division of University Cardiology, IRCCS Galeazzi - Sant'Ambrogio Hospital, Milan, Italy
| | - Dario Tino Bertolone
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy
| | - Takuya Mizukami
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Division of Clinical Pharmacology, Department of Pharmacology, Showa University, Tokyo, Japan
| | - Pasquale Paolisso
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy
| | | | - Daniel Munhoz
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Koshiro Sakai
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Ruiko Seki
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | | | - Giuseppe Esposito
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Advanced Biomedical Sciences, University Federico II, Naples, Italy
| | | | - Niya Mileva
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Attilio Leone
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Alessandro Candreva
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Cardiology, Zurich University Hospital, Zurich, Switzerland; PoliTo(BIO) Med Lab, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
| | | | | | | | | | - Eric Wyffels
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | | | - Jeroen Sonck
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Emanuele Barbato
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium; Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland.
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17
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Garcia-Garcia HM, De Maria GL. Bolus or Continuous Thermodilution: Which Is the Right Approach to Convert Assessment of CMD Into an "Atomic Habit"? JACC Cardiovasc Interv 2023; 16:2778-2781. [PMID: 38030362 DOI: 10.1016/j.jcin.2023.10.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/05/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023]
Affiliation(s)
| | - Giovanni Luigi De Maria
- Oxford Heart Centre, Oxford University Hospitals, National Health Service Trust, Oxford, United Kingdom; Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom; National Institute for Health Research Oxford Biomedical Research Centre, Oxford, United Kingdom
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18
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Jansen TPJ, de Vos A, Paradies V, Dimitriu‐Leen A, Crooijmans C, Elias‐Smale S, Rodwell L, Maas AHEM, Smits PC, Pijls N, van Royen N, Damman P. Continuous Versus Bolus Thermodilution-Derived Coronary Flow Reserve and Microvascular Resistance Reserve and Their Association With Angina and Quality of Life in Patients With Angina and Nonobstructive Coronaries: A Head-to-Head Comparison. J Am Heart Assoc 2023; 12:e030480. [PMID: 37577948 PMCID: PMC10492956 DOI: 10.1161/jaha.123.030480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023]
Abstract
Background Coronary flow reserve (CFR) and microvascular resistance reserve (MRR) are physiological parameters to assess coronary microvascular dysfunction. CFR and MRR can be assessed using bolus or continuous thermodilution, and the correlation between these methods has not been clarified. Furthermore, their association with angina and quality of life is unknown. Methods and Results In total, 246 consecutive patients with angina and nonobstructive coronary arteries from the multicenter Netherlands Registry of Invasive Coronary Vasomotor Function Testing (NL-CFT) were investigated. The 36-item Short Form Health Survey Quality of Life and Seattle Angina questionnaires were completed by 153 patients before the invasive measurements. CFR and MRR were measured consecutively with bolus and continuous thermodilution. Mean continuous thermodilution-derived coronary flow reserve (CFRabs) was significantly lower than mean bolus thermodilution-derived coronary flow reserve (CFRbolus) (2.6±1.0 versus 3.5±1.8; P<0.001), with a modest correlation (ρ=0.305; P<0.001). Mean continuous thermodilution-derived microvascular resistance reserve (MRRabs) was also significantly lower than mean bolus thermodilution-derived MRR (MRRbolus) (3.1±1.1 versus 4.2±2.5; P<0.001), with a weak correlation (ρ=0.280; P<0.001). CFRbolus and MRRbolus showed no correlation with any of the angina and quality of life domains, whereas CFRabs and MRRabs showed a significant correlation with physical limitation (P=0.005, P=0.009, respectively) and health (P=0.026, P=0.012). In a subanalysis in patients in whom spasm was excluded, the correlation further improved (MRRabs versus physical limitation: ρ=0.363; P=0.041, MRRabs versus physical health: ρ=0.482; P=0.004). No association with angina frequency and stability was found. Conclusions Absolute flow measurements using continuous thermodilution to calculate CFRabs and MRRabs weakly correlate with, and are lower than, the surrogates CFRbolus and MRRbolus. Absolute flow parameters showed a relationship with physical complaints. No relationship with angina frequency and stability was found.
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Affiliation(s)
- Tijn P. J. Jansen
- Department of CardiologyRadboud University Medical CenterNijmegenThe Netherlands
| | - Annemiek de Vos
- Department of CardiologyCatharina HospitalEindhovenThe Netherlands
| | - Valeria Paradies
- Department of CardiologyMaasstad HospitalRotterdamThe Netherlands
| | | | - Caïa Crooijmans
- Department of CardiologyRadboud University Medical CenterNijmegenThe Netherlands
| | - Suzette Elias‐Smale
- Department of CardiologyRadboud University Medical CenterNijmegenThe Netherlands
| | - Laura Rodwell
- Section Biostatistics, Department for Health EvidenceRadboud Institute of Health Sciences, Radboud University Medical CentreNijmegenThe Netherlands
| | - Angela H. E. M. Maas
- Department of CardiologyRadboud University Medical CenterNijmegenThe Netherlands
| | - Pieter C. Smits
- Department of CardiologyMaasstad HospitalRotterdamThe Netherlands
| | - Nico Pijls
- Department of CardiologyCatharina HospitalEindhovenThe Netherlands
| | - Niels van Royen
- Department of CardiologyRadboud University Medical CenterNijmegenThe Netherlands
| | - Peter Damman
- Department of CardiologyRadboud University Medical CenterNijmegenThe Netherlands
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19
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Maurina M, Benedetti A, Stefanini G, Condorelli G, Collet C, Zivelonghi C, Smits PC, Paradies V. Coronary Vascular (DYS) Function and Invasive Physiology Assessment: Insights into Bolus and Continuous Thermodilution Methods. J Clin Med 2023; 12:4864. [PMID: 37510979 PMCID: PMC10381553 DOI: 10.3390/jcm12144864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 07/30/2023] Open
Abstract
A considerable number of patients with angina or myocardial ischemia have no significant coronary artery disease on invasive angiography. In recent years, several steps towards a better comprehension of the pathophysiology of these conditions, angina or ischemia with non-obstructive coronary arteries (ANOCA/INOCA), have been made. Nevertheless, several gaps in knowledge still remain. This review is intended to provide a comprehensive overview of ANOCA and INOCA, with a particular focus on pathophysiology, recent diagnostic innovations, gaps in knowledge and treatment modalities.
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Affiliation(s)
- Matteo Maurina
- Department of Biomedical Sciences, Humanitas University, 20072 Pieve Emanuele, MI, Italy
- Cardio Center, IRCCS Humanitas Research Hospital, 20089 Rozzano, MI, Italy
- Department of Cardiology, Maasstad Hospital, 3079 DZ Rotterdam, The Netherlands
| | - Alice Benedetti
- HartCentrum, Antwerpen Hospital Network (ZNA) Middelheim, 2020 Antwerp, Belgium
| | - Giulio Stefanini
- Department of Biomedical Sciences, Humanitas University, 20072 Pieve Emanuele, MI, Italy
- Cardio Center, IRCCS Humanitas Research Hospital, 20089 Rozzano, MI, Italy
| | - Gianluigi Condorelli
- Department of Biomedical Sciences, Humanitas University, 20072 Pieve Emanuele, MI, Italy
- Cardio Center, IRCCS Humanitas Research Hospital, 20089 Rozzano, MI, Italy
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV Clinic, 9300 Aalst, Belgium
| | - Carlo Zivelonghi
- HartCentrum, Antwerpen Hospital Network (ZNA) Middelheim, 2020 Antwerp, Belgium
| | - Pieter C. Smits
- Department of Cardiology, Maasstad Hospital, 3079 DZ Rotterdam, The Netherlands
| | - Valeria Paradies
- Department of Cardiology, Maasstad Hospital, 3079 DZ Rotterdam, The Netherlands
- Department of Cardiology, Erasmus University Medical Center, Thoraxcenter, 3015 GD Rotterdam, The Netherlands
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20
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Zimmermann FM, Tonino PAL. The quest for accurate tools to open the black box of the microcirculation: continuous thermodilution and MRR. EUROINTERVENTION 2023; 19:e105-e106. [PMID: 37283130 PMCID: PMC10240721 DOI: 10.4244/eij-e-23-00019] [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] [Indexed: 06/08/2023]
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21
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Gallinoro E, Bertolone DT, Fernandez-Peregrina E, Paolisso P, Bermpeis K, Esposito G, Gomez-Lopez A, Candreva A, Mileva N, Belmonte M, Mizukami T, Fournier S, Vanderheyden M, Wyffels E, Bartunek J, Sonck J, Barbato E, Collet C, De Bruyne B. Reproducibility of bolus versus continuous thermodilution for assessment of coronary microvascular function in patients with ANOCA. EUROINTERVENTION 2023; 19:e155-e166. [PMID: 36809253 PMCID: PMC10242662 DOI: 10.4244/eij-d-22-00772] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 01/04/2023] [Indexed: 02/23/2023]
Abstract
BACKGROUND A bolus thermodilution-derived index of microcirculatory resistance (IMR) has emerged as the standard for assessing coronary microvascular dysfunction (CMD). Continuous thermodilution has recently been introduced as a tool to quantify absolute coronary flow and microvascular resistance directly. Microvascular resistance reserve (MRR) derived from continuous thermodilution has been proposed as a novel metric of microvascular function, which is independent of epicardial stenoses and myocardial mass. AIMS We aimed to assess the reproducibility of bolus and continuous thermodilution in assessing coronary microvascular function. METHODS Patients with angina and non-obstructive coronary artery disease (ANOCA) at angiography were prospectively enrolled. Bolus and continuous intracoronary thermodilution measurements were obtained in duplicate in the left anterior descending artery (LAD). Patients were randomly assigned in a 1:1 ratio to undergo either bolus thermodilution first or continuous thermodilution first. RESULTS A total of 102 patients were enrolled. The mean fractional flow reserve (FFR) was 0.86±0.06. Coronary flow reserve (CFR) calculated with continuous thermodilution (CFRcont) was significantly lower than bolus thermodilution-derived CFR (CFRbolus; 2.63±0.65 vs 3.29±1.17; p<0.001). CFRcont showed a higher reproducibility than CFRbolus (variability: 12.7±10.4% continuous vs 31.26±24.85% bolus; p<0.001). MRR showed a higher reproducibility than IMR (variability 12.4±10.1% continuous vs 24.2±19.3% bolus; p<0.001). No correlation was found between MRR and IMR (r=0.1, 95% confidence interval: -0.09 to 0.29; p=0.305). CONCLUSIONS In the assessment of coronary microvascular function, continuous thermodilution demonstrated significantly less variability on repeated measurements than bolus thermodilution.
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Affiliation(s)
- Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli', Naples, Italy
| | - Dario Tino Bertolone
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University Federico II, Naples, Turin, Italy
| | | | - Pasquale Paolisso
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University Federico II, Naples, Turin, Italy
| | | | - Giuseppe Esposito
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University Federico II, Naples, Turin, Italy
| | | | - Alessandro Candreva
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Cardiology, Zurich University Hospital, Zurich, Switzerland
- Department of Mechanical and Aerospace Engineering, PolitoBIO Med Lab, Politecnico di Torino, Italy
| | - Niya Mileva
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | | | | | - Stephane Fournier
- Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | | | - Eric Wyffels
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | | | - Jeroen Sonck
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Emanuele Barbato
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University Federico II, Naples, Turin, Italy
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
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22
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Toya T, Lerman A. Beyond CFR: Theoretical Considerations of Microvascular Reserve. JACC Cardiovasc Interv 2023; 16:482-484. [PMID: 36858669 DOI: 10.1016/j.jcin.2023.01.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/20/2023] [Accepted: 01/20/2023] [Indexed: 03/02/2023]
Affiliation(s)
- Takumi Toya
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA; Division of Cardiology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Amir Lerman
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.
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23
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Kiriyama H, Kiyosue A, Minatsuki S, Kawahara T, Katsushika S, Kamon T, Hirose K, Shinohara H, Miura M, Saito A, Kikuchi H, Kodera S, Hatano M, Ando J, Myojo M, Itoh N, Yamamoto K, Ikenouchi H, Takeda N, Komuro I. Potential value of saline-induced Pd/Pa ratio in patients with coronary artery stenosis. Front Cardiovasc Med 2023; 9:1001833. [PMID: 36684556 PMCID: PMC9853169 DOI: 10.3389/fcvm.2022.1001833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 12/12/2022] [Indexed: 01/09/2023] Open
Abstract
Background Fractional flow reserve (FFR) is the current gold standard for identifying myocardial ischemia in individuals with coronary artery stenosis. However, FFR is not penetrated as much worldwide due to time consumption, costs associated with adenosine, FFR-related discomfort, and complications. Resting physiological indexes may be widely accepted alternatives to FFR, while the discrepancies with FFR were found in up to 20% of lesions. The saline-induced Pd/Pa ratio (SPR) is a new simplified option for evaluating coronary stenosis. However, the clinical implication of SPR remains unclear. Objectives In the present study, we aimed to compare the accuracies of SPR and resting full-cycle ratio (RFR) and to investigate the incremental value of SPR in clinical practice. Methods In this multicenter prospective study, 112 coronary lesions (105 patients) were evaluated by SPR, RFR, and FFR. Results The overall median age was 71 years, and 84.8% were men. SPR was correlated more strongly with FFR than with RFR (r = 0.874 vs. 0.713, respectively; p < 0.001). Using FFR < 0.80 as the reference standard variable, the area under the receiver-operating characteristic (ROC) curve for SPR was superior to that of RFR (0.932 vs. 0.840, respectively; p = 0.009). Conclusion Saline-induced Pd/Pa ratio predicted FFR more accurately than RFR. SPR could be an alternative method for evaluating coronary artery stenosis and further investigation including elucidation of the mechanism of SPR is needed (225 words).
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Affiliation(s)
- Hiroyuki Kiriyama
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Arihiro Kiyosue
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan,Department of Cardiology, Moriyama Memorial Hospital, Tokyo, Japan
| | - Shun Minatsuki
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan,*Correspondence: Shun Minatsuki,
| | - Takuya Kawahara
- Biostatistics Division, Clinical Research Promotion Center, The University of Tokyo Hospital, Tokyo, Japan
| | - Susumu Katsushika
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Tatsuya Kamon
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Kazutoshi Hirose
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Hiroki Shinohara
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Mizuki Miura
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Akihito Saito
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Hironobu Kikuchi
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Satoshi Kodera
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Masaru Hatano
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Jiro Ando
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Masahiro Myojo
- Department of Cardiology, Kanto Central Hospital of the Mutual Aid Association of Public School Teachers, Tokyo, Japan
| | - Nobuhiko Itoh
- Department of Cardiology, Kanto Central Hospital of the Mutual Aid Association of Public School Teachers, Tokyo, Japan
| | - Keisuke Yamamoto
- Department of Cardiology, Japanese Red Cross Medical Center, Tokyo, Japan
| | - Hiroshi Ikenouchi
- Department of Cardiology, Japanese Red Cross Medical Center, Tokyo, Japan
| | - Norifumi Takeda
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Issei Komuro
- Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan
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24
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Pruthi S, Siddiqui E, Smilowitz NR. Beyond Coronary Artery Disease: Assessing the Microcirculation. Interv Cardiol Clin 2023; 12:119-129. [PMID: 36372455 PMCID: PMC10019932 DOI: 10.1016/j.iccl.2022.09.010] [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] [Indexed: 11/12/2022]
Abstract
Ischemic heart disease (IHD) affects more than 20 million adults in the United States. Although classically attributed to atherosclerosis of the epicardial coronary arteries, nearly half of patients with stable angina and IHD who undergo invasive coronary angiography do not have obstructive epicardial coronary artery disease. Ischemia with nonobstructive coronary arteries is frequently caused by microvascular angina with underlying coronary microvascular dysfunction (CMD). Greater understanding the pathophysiology, diagnosis, and treatment of CMD holds promise to improve clinical outcomes of patients with ischemic heart disease.
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Affiliation(s)
- Sonal Pruthi
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA
| | - Emaad Siddiqui
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA
| | - Nathaniel R Smilowitz
- Division of Cardiology, Department of Medicine, NYU Langone Health, 550 First Avenue, New York, NY 10016, USA; Cardiology Section, Department of Medicine, VA New York Harbor Healthcare System, 423 East 23rd Street, New York, NY 10010, USA; The Leon H. Charney Division of Cardiology, NYU Langone Health, NYU School of Medicine, 423 East 23rd Street, 12-West, New York, NY 10010, USA.
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25
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Perera D, Berry C, Hoole SP, Sinha A, Rahman H, Morris PD, Kharbanda RK, Petraco R, Channon K. Invasive coronary physiology in patients with angina and non-obstructive coronary artery disease: a consensus document from the coronary microvascular dysfunction workstream of the British Heart Foundation/National Institute for Health Research Partnership. Heart 2022; 109:88-95. [PMID: 35318254 PMCID: PMC9811089 DOI: 10.1136/heartjnl-2021-320718] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/17/2022] [Indexed: 02/04/2023] Open
Abstract
Nearly half of all patients with angina have non-obstructive coronary artery disease (ANOCA); this is an umbrella term comprising heterogeneous vascular disorders, each with disparate pathophysiology and prognosis. Approximately two-thirds of patients with ANOCA have coronary microvascular disease (CMD). CMD can be secondary to architectural changes within the microcirculation or secondary to vasomotor dysfunction. An inability of the coronary vasculature to augment blood flow in response to heightened myocardial demand is defined as an impaired coronary flow reserve (CFR), which can be measured non-invasively, using imaging, or invasively during cardiac catheterisation. Impaired CFR is associated with myocardial ischaemia and adverse cardiovascular outcomes.The CMD workstream is part of the cardiovascular partnership between the British Heart Foundation and The National Institute for Health Research in the UK and comprises specialist cardiac centres with expertise in coronary physiology assessment. This document outlines the two main modalities (thermodilution and Doppler techniques) for estimation of coronary flow, vasomotor testing using acetylcholine, and outlines a standard operating procedure that could be considered for adoption by national networks. Accurate and timely disease characterisation of patients with ANOCA will enable clinicians to tailor therapy according to their patients' coronary physiology. This has been shown to improve patients' quality of life and may lead to improved cardiovascular outcomes in the long term.
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Affiliation(s)
- Divaka Perera
- British Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - Colin Berry
- BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK
- Cardiology, Golden Jubilee National Hospital, Clydebank, UK
| | | | - Aish Sinha
- British Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - Haseeb Rahman
- British Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - Paul D Morris
- Infection, Immunity and Cardiovascular Disease, The University of Sheffield, Sheffield, UK
| | | | - Ricardo Petraco
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Keith Channon
- Department of Cardiovascular Medicine, University of Oxford, Oxford, UK
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26
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Damman P, Elias-Smale SE, Jansen TPJ, Konst RE, Dimitriu-Leen AC, Hartzema M, van Royen N, Maas AHEM. Contemporary and future invasive coronary vasomotor function testing and treatment in patients with ischaemia with no obstructive coronary arteries. Eur Heart J Suppl 2022; 24:H18-H24. [PMID: 36382006 PMCID: PMC9650459 DOI: 10.1093/eurheartjsupp/suac053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the current review, we emphasize the importance of diagnostics and therapy in patients with ischaemia with no obstructive coronary arteries (INOCA). The importance of the diagnostic coronary function test (CFT) procedure is described, including future components including angiography-derived physiology and invasive continuous thermodilution. Furthermore, the main components of treatment are discussed. Future directions include the national registration ensuring a high quality of INOCA care, besides a potential source to improve our understanding of pathophysiology in the various phenotypes of coronary vascular dysfunction, the diagnostic CFT procedure, and treatment.
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Affiliation(s)
- Peter Damman
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
| | - Suzette E Elias-Smale
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
| | - Tijn P J Jansen
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
| | - Regina E Konst
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
| | | | - Mariëlle Hartzema
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
| | - Niels van Royen
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
| | - Angela H E M Maas
- Department of Cardiology, Radboud University Medical Center , Nijmegen , the Netherlands
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27
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Morris PD, Al-Lamee RK, Berry C. Coronary physiological assessment in the catheter laboratory: haemodynamics, clinical assessment and future perspectives. Heart 2022; 108:1737-1746. [PMID: 35768192 PMCID: PMC9606498 DOI: 10.1136/heartjnl-2020-318743] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Paul D Morris
- Department of Infection, Immunity and Cardiovascular Disease, The University of Sheffield, Sheffield, UK
| | | | - Colin Berry
- BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK
- Department of Cardiology, Golden Jubilee National Hospital, Clydebank, UK
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28
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Zhou J, Onuma Y, Garg S, Kotoku N, Kageyama S, Masuda S, Ninomiya K, Huo Y, Reiber JHC, Tu S, Piek JJ, Escaned J, Perera D, Bourantas C, Yan H, Serruys PW. Angiography derived assessment of the coronary microcirculation: is it ready for prime time? Expert Rev Cardiovasc Ther 2022; 20:549-566. [PMID: 35899781 DOI: 10.1080/14779072.2022.2098117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Non-obstructive coronary arteries (NOCA) are present in 39.7% to 62.4% of patients who undergo elective angiography. Coronary microcirculation (<400 µm) is not visible on angiography therefore functional assessment, invasive or non-invasive plays a prior role to help provide a more personalized diagnosis of angina. AREA COVERED In this review, we revise the pathophysiology, clinical importance and invasive assessment of the coronary microcirculation, and discuss angiography-derived indices of microvascular resistance. A comprehensive literature review over four decades is also undertaken. EXPERT OPINION The coronary microvasculature plays an important role in flow autoregulation and metabolic regulation. Invasive assessment of microvascular resistance is a validated modality with independent prognostic value, nevertheless, its routine application is hampered by the requirement of intravascular instrumentation and hyperaemic agents. The angiography-derived index of microvascular resistance has emerged as a promising surrogate in pilot studies, however, more data are needed to validate and compare the diagnostic and prognostic accuracy of different equations as well as to illustrate the relationship between angiography-derived parameters for epicardial coronary arteries and those for the microvasculature.
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Affiliation(s)
- Jinying Zhou
- National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Fuwai Hospital, Beijing, China.,Department of Cardiology, National University of Ireland Galway (NUIG), Galway, Ireland
| | - Yoshinobu Onuma
- Department of Cardiology, National University of Ireland Galway (NUIG), Galway, Ireland
| | - Scot Garg
- Department of CardiologyRoyal Blackburn Hospital, Blackburn, United Kingdom
| | - Nozomi Kotoku
- Department of Cardiology, National University of Ireland Galway (NUIG), Galway, Ireland
| | - Shigetaka Kageyama
- Department of Cardiology, National University of Ireland Galway (NUIG), Galway, Ireland
| | - Shinichiro Masuda
- Department of Cardiology, National University of Ireland Galway (NUIG), Galway, Ireland
| | - Kai Ninomiya
- Department of Cardiology, National University of Ireland Galway (NUIG), Galway, Ireland
| | - Yunlong Huo
- PKU-HKUST Shenzhen-Hong Kong Institution, Shenzhen, China; Department of Cardiology, Peking University First Hospital, Beijing, China; Institute of Mechanobiology & Medical Engineering, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Johan H C Reiber
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Shengxian Tu
- School of Biomedical Engineering,Biomedical Instrument Institute Shanghai Jiao Tong University, Shanghai, China
| | - Jan J Piek
- Department of Cardiology, Academic Medical Center of Amsterdam, Amsterdam, The Netherlands
| | - Javier Escaned
- Complutense University of Madrid Hospital Clinico San Carlos IDISCC, Madrid, Spain
| | - Divaka Perera
- Cardiovascular Division, King's College London, London, UK
| | - Christos Bourantas
- Department of Cardiology, Barts Heart Centre, Barts Health NHS Trust, London, UK; Centre for Cardiovascular Medicine and Devices, William Harvey Research Institute, Queen Mary University of London, London, UK; Institute of Cardiovascular Sciences, University College London, London, UK
| | - Hongbing Yan
- Chinese Academy of Medical Sciences, Shenzhen, China; Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Fuwai Hospital,, Beijing, China
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29
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Aubiniere-Robb L, Gosling R, Taylor DJ, Newman T, Hose DR, Halliday I, Lawford PV, Narracott AJ, Gunn JP, Morris PD. The Complementary Value of Absolute Coronary Flow in the Assessment of Patients with Ischaemic Heart Disease. NATURE CARDIOVASCULAR RESEARCH 2022; 1:611-616. [PMID: 35865080 PMCID: PMC7613105 DOI: 10.1038/s44161-022-00091-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fractional flow reserve (FFR) is the current gold-standard invasive assessment of coronary artery disease (CAD). FFR reports coronary blood flow (CBF) as a fraction of a hypothetical and unknown normal value. Although used routinely to diagnose CAD and guide treatment, how accurately FFR predicts actual CBF changes remains unknown. Here we compared fractional CBF with the absolute CBF (aCBF in mL/min), measured with a computational method during standard angiography and pressure-wire assessment, on 203 diseased arteries (143 patients). We found a substantial correlation between the two measurements (r 0.89, Cohen’s Kappa 0.71). Concordance between fractional and absolute CBF reduction was high when FFR was >0.80 (91%), but reduced when FFR was ≤0.80 (81%), 0.70-0.80 (68%) and, particularly 0.75-0.80 (62%). Discordance was associated with coronary microvascular resistance, vessel diameter and mass of myocardium subtended, all factors to which FFR is agnostic. Assessment of aCBF complements FFR, and may be valuable to assess CBF, particularly in cases within the FFR ‘grey-zone’.
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30
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Coronary flow autoregulation during Impella CP support post successful chronic total occlusion percutaneous coronary intervention. Coron Artery Dis 2022; 33:599-600. [PMID: 35500097 DOI: 10.1097/mca.0000000000001150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Lim PO. Angina with coronary microvascular dysfunction and its physiological assessment: a review with cases. THE BRITISH JOURNAL OF CARDIOLOGY 2022; 29:13. [PMID: 36212789 PMCID: PMC9534121 DOI: 10.5837/bjc.2022.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Imagine that it is possible to know, the actual coronary blood flow. Would this not remove any doubt, if a chest pain is the heart's fault?
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32
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Mangiacapra F, Viscusi MM, Verolino G, Paolucci L, Nusca A, Melfi R, Ussia GP, Grigioni F. Invasive Assessment of Coronary Microvascular Function. J Clin Med 2021; 11:jcm11010228. [PMID: 35011968 PMCID: PMC8745537 DOI: 10.3390/jcm11010228] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/21/2021] [Accepted: 12/29/2021] [Indexed: 01/01/2023] Open
Abstract
The critical role of the coronary microvascular compartment and its invasive functional assessment has become apparent in light of the significant proportion of patients presenting signs and symptoms of myocardial ischemia, despite the absence of epicardial disease, or after the adequate treatment of it. However, coronary microvascular dysfunction (CMD) represents a diagnostic challenge because of the small dimensions of the coronary microvasculature, which prevents direct angiographic visualization. Several diagnostic tools are now available for the invasive assessment of the coronary microvascular function, which, in association with the physiological indices used to investigate the epicardial department, may provide a comprehensive evaluation of the coronary circulation as a whole. Recent evidence suggests that the physiology-guided management of CMD, although apparently costly and time-consuming, may offer a net clinical benefit in terms of symptom improvement among patients with angina and ischemic heart disease. However, despite the results of several observational studies, the prognostic effect of the physiology-driven management of CMD within this population is currently a matter of debate, and therefore represents an unmet clinical need that urgently deserves further investigation.
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33
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Meeder JG, Hartzema-Meijer MJ, Jansen TPJ, Konst RE, Damman P, Elias-Smale SE. Outpatient Management of Patients With Angina With No Obstructive Coronary Arteries: How to Come to a Proper Diagnosis and Therapy. Front Cardiovasc Med 2021; 8:716319. [PMID: 34796207 PMCID: PMC8592903 DOI: 10.3389/fcvm.2021.716319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 09/22/2021] [Indexed: 12/28/2022] Open
Abstract
Two-thirds of women and one-third of men who undergo a clinically indicated coronary angiography for stable angina, have no obstructive coronary artery disease (CAD). Coronary vascular dysfunction is a highly prevalent underlying cause of angina in these so called “Angina with No Obstructive Coronary Arteries (ANOCA)” patients, foremost in middle aged women. Coronary vascular dysfunction encompasses various endotypes, namely epicardial and microvascular coronary spasms, impaired vasodilatation, and increased microvascular resistance. ANOCA patients, especially those with underlying coronary vascular dysfunction, have an adverse cardiovascular prognosis, poor physical functioning, and a reduced quality of life. Since standard ischemia detection tests and coronary angiograms are not designed to diagnose coronary vascular dysfunction, this ischemic heart disease is often overlooked and hence undertreated. But adequate diagnosis is vital, so that treatment can be started to reduce symptoms, reduce healthcare costs and improve quality of life and cardiovascular prognosis. The purpose of this review is to give a contemporary overview of ANOCA with focus on coronary vascular dysfunction. We will provide a possible work-up of patients suspected of coronary vascular dysfunction in the outpatient clinical setting, based on the latest scientific insights and international consensus documents. We will discuss the value of ischemia detection testing, and non-invasive and invasive methods to diagnose coronary vascular dysfunction. Furthermore, we will go into pharmacological and non-pharmacological therapeutic options including anti-anginal regimens and lifestyle interventions.
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Affiliation(s)
- Joan G Meeder
- Department of Cardiology, VieCuri Medical Center, Venlo, Netherlands
| | | | - Tijn P J Jansen
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Regina E Konst
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Peter Damman
- Department of Cardiology, Radboud University Medical Center, Nijmegen, Netherlands
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34
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Gallinoro E, Paolisso P, Candreva A, Bermpeis K, Fabbricatore D, Esposito G, Bertolone D, Fernandez Peregrina E, Munhoz D, Mileva N, Penicka M, Bartunek J, Vanderheyden M, Wyffels E, Sonck J, Collet C, De Bruyne B, Barbato E. Microvascular Dysfunction in Patients With Type II Diabetes Mellitus: Invasive Assessment of Absolute Coronary Blood Flow and Microvascular Resistance Reserve. Front Cardiovasc Med 2021; 8:765071. [PMID: 34738020 PMCID: PMC8562107 DOI: 10.3389/fcvm.2021.765071] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 09/22/2021] [Indexed: 01/09/2023] Open
Abstract
Background: Coronary microvascular dysfunction (CMD) is an early feature of diabetic cardiomyopathy, which usually precedes the onset of diastolic and systolic dysfunction. Continuous intracoronary thermodilution allows an accurate and reproducible assessment of absolute coronary blood flow and microvascular resistance thus allowing the evaluation of coronary flow reserve (CFR) and Microvascular Resistance Reserve (MRR), a novel index specific for microvascular function, which is independent from the myocardial mass. In the present study we compared absolute coronary flow and resistance, CFR and MRR assessed by continuous intracoronary thermodilution in diabetic vs. non-diabetic patients. Left atrial reservoir strain (LASr), an early marker of diastolic dysfunction was compared between the two groups. Methods: In this observational retrospective study, 108 patients with suspected angina and non-obstructive coronary artery disease (NOCAD) consecutively undergoing elective coronary angiography (CAG) from September 2018 to June 2021 were enrolled. The invasive functional assessment of microvascular function was performed in the left anterior descending artery (LAD) with intracoronary continuous thermodilution. Patients were classified according to the presence of DM. Absolute resting and hyperemic coronary blood flow (in mL/min) and resistance (in WU) were compared between the two cohorts. FFR was measured to assess coronary epicardial lesions, while CFR and MRR were calculated to assess microvascular function. LAS, assessed by speckle tracking echocardiography, was used to detect early myocardial structural changes potentially associated with microvascular dysfunction. Results: The median FFR value was 0.83 [0.79-0.87] without any significant difference between the two groups. Absolute resting and hyperemic flow in the left anterior descending coronary were similar between diabetic and non-diabetic patients. Similarly, resting and hyperemic resistances did not change significantly between the two groups. In the DM cohort the CFR and MRR were significantly lower compared to the control group (CFR = 2.38 ± 0.61 and 2.88 ± 0.82; MRR = 2.79 ± 0.87 and 3.48 ± 1.02 for diabetic and non-diabetic patients respectively, [p < 0.05 for both]). Likewise, diabetic patients had a significantly lower reservoir, contractile and conductive LAS (all p < 0.05). Conclusions: Compared with non-diabetic patients, CFR and MRR were lower in patients with DM and non-obstructive epicardial coronary arteries, while both resting and hyperemic coronary flow and resistance were similar. LASr was lower in diabetic patients, confirming the presence of a subclinical diastolic dysfunction associated to the microcirculatory impairment. Continuous intracoronary thermodilution-derived indexes provide a reliable and operator-independent assessment of coronary macro- and microvasculature and might potentially facilitate widespread clinical adoption of invasive physiologic assessment of suspected microvascular disease.
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Affiliation(s)
- Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Translational Medical Sciences, University of Campania ‘Luigi Vanvitelli', Naples, Italy
| | - Pasquale Paolisso
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | | | | | - Davide Fabbricatore
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Giuseppe Esposito
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Dario Bertolone
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | | | - Daniel Munhoz
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
- Discipline of Cardiology, Department of Internal Clinical Medicine, University of Campinas, Campinas, Brazil
| | - Niya Mileva
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | | | | | | | - Eric Wyffels
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Jeroen Sonck
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | - Emanuele Barbato
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
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35
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De Bruyne B, Pijls NHJ, Gallinoro E, Candreva A, Fournier S, Keulards DCJ, Sonck J, Van't Veer M, Barbato E, Bartunek J, Vanderheyden M, Wyffels E, De Vos A, El Farissi M, Tonino PAL, Muller O, Collet C, Fearon WF. Microvascular Resistance Reserve for Assessment of Coronary Microvascular Function: JACC Technology Corner. J Am Coll Cardiol 2021; 78:1541-1549. [PMID: 34620412 DOI: 10.1016/j.jacc.2021.08.017] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 02/06/2023]
Abstract
The need for a quantitative and operator-independent assessment of coronary microvascular function is increasingly recognized. We propose the theoretical framework of microvascular resistance reserve (MRR) as an index specific for the microvasculature, independent of autoregulation and myocardial mass, and based on operator-independent measurements of absolute values of coronary flow and pressure. In its general form, MRR equals coronary flow reserve (CFR) divided by fractional flow reserve (FFR) corrected for driving pressures. In 30 arteries, pressure, temperature, and flow velocity measurements were obtained simultaneously at baseline (BL), during infusion of saline at 10 mL/min (rest) and 20 mL/min (hyperemia). A strong correlation was found between continuous thermodilution-derived MRR and Doppler MRR (r = 0.88; 95% confidence interval: 0.72-0.93; P < 0.001). MRR was independent from the epicardial resistance, the lower the FFR value, the greater the difference between MRR and CFR. Therefore, MRR is proposed as a specific, quantitative, and operator-independent metric to quantify coronary microvascular dysfunction.
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Affiliation(s)
- Bernard De Bruyne
- Cardiovascular Center Aalst, Aalst, Belgium; Lausanne University Centre Hospital, Lausanne, Switzerland.
| | - Nico H J Pijls
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands
| | - Emanuele Gallinoro
- Cardiovascular Center Aalst, Aalst, Belgium; Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli," Naples, Italy. https://twitter.com/Egallinoro
| | - Alessandro Candreva
- Cardiovascular Center Aalst, Aalst, Belgium. https://twitter.com/alecandreva
| | | | | | - Jeroen Sonck
- Cardiovascular Center Aalst, Aalst, Belgium; Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy. https://twitter.com/jeroen_sonck
| | - Marcel Van't Veer
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands; Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Emanuele Barbato
- Cardiovascular Center Aalst, Aalst, Belgium; Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy. https://twitter.com/EmanueleBarba13
| | | | | | | | - Annemiek De Vos
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands
| | - Mohamed El Farissi
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands
| | - Pim A L Tonino
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands
| | - Olivier Muller
- Lausanne University Centre Hospital, Lausanne, Switzerland
| | - Carlos Collet
- Cardiovascular Center Aalst, Aalst, Belgium. https://twitter.com/ColletCarlos
| | - William F Fearon
- Division of Cardiovascular Medicine, Stanford University School of Medicine and Stanford Cardiovascular Institute, Stanford, California, USA
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36
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Jansen TPJ, Konst RE, Elias-Smale SE, van den Oord SC, Ong P, de Vos AMJ, van de Hoef TP, Paradies V, Smits PC, van Royen N, Damman P. Assessing Microvascular Dysfunction in Angina With Unobstructed Coronary Arteries: JACC Review Topic of the Week. J Am Coll Cardiol 2021; 78:1471-1479. [PMID: 34593129 DOI: 10.1016/j.jacc.2021.08.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/28/2021] [Accepted: 08/02/2021] [Indexed: 12/28/2022]
Abstract
Coronary microvascular dysfunction is a highly prevalent condition of both structural and functional coronary disorders in patients with angina and nonobstructive coronary artery disease (ANOCA). Current diagnostic modalities to assess microvascular function are related to prognosis, but these modalities have several technical shortcomings and lack the opportunity to determine true coronary blood flow and microvascular resistance. Intracoronary continuous thermodilution assessment of absolute coronary flow (Q) and microvascular resistance (R) was recently shown to be safe and feasible in ANOCA. Further exploration and implementation could lead to a better understanding and treatment of patients with ANOCA. This review discuss the coronary pathophysiology of microvascular dysfunction, provides an overview of noninvasive and invasive diagnostics, and focuses on the novel continuous thermodilution method. Finally, how these measurements of absolute Q and R could be integrated and how this would affect future clinical care are discussed.
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Affiliation(s)
| | | | | | | | - Peter Ong
- Robert Bosch Hospital, Stuttgart, Germany
| | | | | | | | | | - Niels van Royen
- Radboudumc, Nijmegen, the Netherlands. https://twitter.com/NielsRoyen
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37
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Gallinoro E, Candreva A, Colaiori I, Kodeboina M, Fournier S, Nelis O, Di Gioia G, Sonck J, van 't Veer M, Pijls NH, Collet C, De Bruyne B. Thermodilution-derived volumetric resting coronary blood flow measurement in humans. EUROINTERVENTION 2021; 17:e672-e679. [PMID: 33528358 PMCID: PMC9724906 DOI: 10.4244/eij-d-20-01092] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Quantification of microvascular function requires the measurement of flow and resistance at rest and during hyperaemia. Continuous intracoronary thermodilution accurately measures coronary flow during hyperaemia. AIMS The aim of this study was to investigate whether continuous coronary thermodilution using lower infusion rates also enables volumetric coronary blood flow measurements (in mL/min) at rest. METHODS In 59 patients (88 arteries), the ratio of distal to proximal coronary pressure (Pd/Pa), as well as absolute blood flow (in mL/min) by continuous thermodilution, was recorded using a pressure/temperature guidewire. Saline was infused at rates of 10 and 20 mL/min. In 27 arteries, Doppler average peak velocity (APV) was measured simultaneously. Pd/Pa, APV, thermodilution-derived coronary flow reserve (CFRthermo) and coronary flow velocity reserve (CFVR) were assessed. In 10 arteries, simultaneous recordings were obtained at saline infusion rates of 6, 8, 10 and 20 mL/min. RESULTS Compared to baseline, saline infusion at 10 mL/min did not change Pd/Pa (0.95±0.05 versus 0.94±0.05, p=0.49) or APV (22±8 versus 23±8 cm/s, p=0.60); conversely, an infusion rate of 20 mL/min induced a decrease in Pd/Pa and an increase in APV. Stable thermodilution tracings were obtained during saline infusion at 8 and 10 mL/min, but not at 6 mL/min. Mean values of CFRthermo and CFVR were similar (2.78±0.91 versus 2.76±1.06, p=0.935) and their individual values correlated closely (r=0.89, 95% CI: 0.78-0.95, p<0.001). CONCLUSIONS In addition to hyperaemic flow, continuous thermodilution can quantify absolute resting coronary blood flow; therefore, it can be used to calculate coronary flow reserve and microvascular resistance reserve.
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Affiliation(s)
- Emanuele Gallinoro
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium,Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | | | | | - Monika Kodeboina
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium,Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Stephane Fournier
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy,Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland
| | - Olivier Nelis
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Giuseppe Di Gioia
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium,Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Jeroen Sonck
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium,Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Marcel van 't Veer
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands,Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Nico H.J. Pijls
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands,Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Carlos Collet
- Cardiovascular Center Aalst, OLV-Clinic, Aalst, Belgium
| | - Bernard De Bruyne
- Cardiovascular Center Aalst, OLV-Clinic, Moorselbaan 164, B-9300 Aalst, Belgium
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Basics of Coronary Thermodilution. JACC Cardiovasc Interv 2021; 14:595-605. [PMID: 33736767 DOI: 10.1016/j.jcin.2020.12.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 01/15/2023]
Abstract
Coronary microvascular dysfunction is a highly prevalent condition in both obstructive and nonobstructive coronary artery disease. Intracoronary thermodilution is a promising technique to investigate coronary microvascular (dys)function in vivo and to assess its most important metric: microvascular resistance. Here, the authors provide a practical review of bolus and continuous thermodilution for the measurement of coronary flow and microvascular resistance. The authors describe the basic principles of indicator-dilution theory and of coronary thermodilution and detail the practicalities of their application in the catheterization laboratory. Finally, the authors discuss contemporary clinical applications of coronary thermodilution-based microvascular assessment in humans and future perspectives.
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Fournier S, Keulards DC, van 't Veer M, Colaiori I, Di Gioia G, Zimmermann F, Mizukami T, Nagumo S, Kodeboina M, El Farissi M, Zelis J, Sonck J, Collet C, Pijls NH, De Bruyne B. Normal values of thermodilution-derived absolute coronary blood flow and microvascular resistance in humans. EUROINTERVENTION 2021; 17:e309-e316. [PMID: 33016881 PMCID: PMC9724861 DOI: 10.4244/eij-d-20-00684] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Absolute hyperaemic coronary blood flow (Q, in mL/min) and resistance (R, in Wood units [WU]) can be measured invasively by continuous thermodilution. AIMS The aim of this study was to assess normal reference values of Q and R. METHODS In 177 arteries (69 patients: 25 controls, i.e., without identifiable coronary atherosclerosis; 44 patients with mild, non-obstructive atherosclerosis), thermodilution-derived hyperaemic Q and total, epicardial, and microvascular absolute resistances (Rtot, Repi, and Rmicro) were measured. In 20 controls and 29 patients, measurements were obtained in all three major coronary arteries, thus allowing calculations of Q and R for the whole heart. In 15 controls (41 vessels) and 25 patients (71 vessels), vessel-specific myocardial mass was derived from coronary computed tomography angiography. RESULTS Whole heart hyperaemic Q tended to be higher in controls compared to patients (668±185 vs 582±138 mL/min, p=0.068). In the left anterior descending coronary artery (LAD), hyperaemic Q was significantly higher (293±102 mL/min versus 228±71 mL/min, p=0.004) in controls than in patients. This was driven mainly by a difference in Repi (43±23 vs 83±41 WU, p=0.048), without significant differences in Rmicro. After adjustment for vessel-specific myocardial mass, hyperaemic Q was similar in the three vascular territories (5.9±1.9, 4.9±1.7, and 5.3±2.1 mL/min/g, p=0.44, in the LAD, left circumflex and right coronary artery, respectively). CONCLUSIONS The present report provides reference values of absolute coronary hyperaemic Q and R. Q was homogeneously distributed in the three major myocardial territories but the large ranges of observed hyperaemic values of flow and of microvascular resistance preclude their clinical use for inter-patient comparison.
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Affiliation(s)
- Stephane Fournier
- Cardiovascular Centre Aalst, OLV Clinic, Aalst, Belgium,Lausanne University Centre Hospital, Lausanne, Switzerland,Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | | | | | | | - Giuseppe Di Gioia
- Cardiovascular Centre Aalst, OLV Clinic, Aalst, Belgium,Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | | | | | - Sakura Nagumo
- Cardiovascular Centre Aalst, OLV Clinic, Aalst, Belgium
| | | | | | - Jo Zelis
- Department of Cardiology, Catharina Hospital Eindhoven, the Netherlands
| | - Jeroen Sonck
- Cardiovascular Centre Aalst, OLV Clinic, Aalst, Belgium,Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy
| | - Carlos Collet
- Cardiovascular Centre Aalst, OLV Clinic, Aalst, Belgium
| | - Nico H.J. Pijls
- Department of Cardiology, Catharina Hospital Eindhoven, the Netherlands,Department of Biomedical Engineering Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Bernard De Bruyne
- Cardiovascular Centre Aalst, OLV-Clinic Aalst, Moorselbaan 164, B-9300 Aalst, Belgium
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Keulards DC, Van 't Veer M, Zelis J, el Farissi M, Zimmermann F, de Vos A, Teeuwen K, Brueren G, Wijnbergen I, Vlaar PJ, Tonino P, Pijls NH. Safety of absolute coronary flow and microvascular resistance measurements by thermodilution. EUROINTERVENTION 2021; 17:229-232. [PMID: 32091402 PMCID: PMC9724960 DOI: 10.4244/eij-d-20-00074] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Marcel Van 't Veer
- Catharina Hospital Eindhoven, Eindhoven, the Netherlands,Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Jo Zelis
- Catharina Hospital Eindhoven, Eindhoven, the Netherlands
| | | | | | | | - Koen Teeuwen
- Catharina Hospital Eindhoven, Eindhoven, the Netherlands
| | - Guus Brueren
- Catharina Hospital Eindhoven, Eindhoven, the Netherlands
| | | | | | - Pim Tonino
- Catharina Hospital Eindhoven, Eindhoven, the Netherlands,Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Nico H.J. Pijls
- Catharina Hospital, Michelangelolaan 2, 5623 EJ Eindhoven, the Netherlands
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Adjedj J, Picard F, Mogi S, Bize A, Sambin L, Muller O, Varenne O, De Bruyne B, Ghaleh B. Accurate assessment of coronary blood flow by continuous thermodilution technique: Validation in a swine model. Catheter Cardiovasc Interv 2021; 99:836-843. [PMID: 34080778 DOI: 10.1002/ccd.29802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/26/2021] [Accepted: 05/20/2021] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To assess the accuracy of coronary thermodilution measurements made with the RayFlow® infusion catheter. BACKGROUND Measurements of absolute coronary blood flow (ABF) and absolute microvascular resistance (Rμ ) by continuous coronary thermodilution can be obtained in humans but their accuracy using a novel dedicated infusion catheter has not yet been validated. We compared ABF values obtained at different infusion rates to coronary blood flow (CBF) values obtained using flow probes, in swine. METHODS Twelve domestic swine were instrumented with coronary flow probes placed around the left anterior descending and circumflex coronary arteries. ABF was assessed with the RayFlow® infusion catheter during continuous saline infusion at fixed rates of 5 (n = 14), 10 (n = 15), 15 (n = 19), and 20 (n = 12) ml/min. RESULTS In the 60 measurements, ABF measured using thermodilution averaged 41 ± 17 ml/min (range from 17 to 90) and CBF values obtained with the coronary flow probes averaged 37 ± 18 ml/min (range from 8 to 87). The corresponding Rμ values were 1532 ± 791 (range from 323 to 5103) and 1903 ± 1162 (range from 287 to 6000) Woods units using thermodilution and coronary flow probe assessments, respectively. ABF and Rμ values measured using thermodilution were significantly correlated with the corresponding measurements obtained using coronary flow probes (R = 0.84 [0.73-0.95] and R = 0.80 [0.69-0.88], respectively). CONCLUSIONS ABF and Rμ assessed by continuous saline infusion through a RayFlow® catheter closely correlate with measurements obtained with the gold standard coronary flow probes in a swine model.
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Affiliation(s)
- Julien Adjedj
- Arnault Tzanck Institute, Department of Cardiology, Saint Laurent du Var, France.,Paris Descartes University, Faculty of Medicine, Paris, France.,Cardiology Department, Université Paris Est Créteil, INSERM, IMRB, Créteil, France.,Cardiology Department, École Nationale Vétérinaire d'Alfort, IMRB, Maisons-Alfort, France.,Lausanne University Hospital, Department of Cardiology, Lausanne, Switzerland
| | - Fabien Picard
- Arnault Tzanck Institute, Department of Cardiology, Saint Laurent du Var, France.,Paris Descartes University, Faculty of Medicine, Paris, France
| | - Satoshi Mogi
- Arnault Tzanck Institute, Department of Cardiology, Saint Laurent du Var, France.,Paris Descartes University, Faculty of Medicine, Paris, France
| | - Alain Bize
- Cardiology Department, Université Paris Est Créteil, INSERM, IMRB, Créteil, France.,Cardiology Department, École Nationale Vétérinaire d'Alfort, IMRB, Maisons-Alfort, France
| | - Lucien Sambin
- Cardiology Department, Université Paris Est Créteil, INSERM, IMRB, Créteil, France.,Cardiology Department, École Nationale Vétérinaire d'Alfort, IMRB, Maisons-Alfort, France
| | - Olivier Muller
- Lausanne University Hospital, Department of Cardiology, Lausanne, Switzerland
| | - Olivier Varenne
- Arnault Tzanck Institute, Department of Cardiology, Saint Laurent du Var, France.,Paris Descartes University, Faculty of Medicine, Paris, France
| | - Bernard De Bruyne
- Lausanne University Hospital, Department of Cardiology, Lausanne, Switzerland.,Cardiology Department, Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium
| | - Bijan Ghaleh
- Cardiology Department, Université Paris Est Créteil, INSERM, IMRB, Créteil, France.,Cardiology Department, École Nationale Vétérinaire d'Alfort, IMRB, Maisons-Alfort, France
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Affiliation(s)
- Nils P Johnson
- Division of Cardiology, Department of Medicine, Weatherhead PET Center, McGovern Medical School at UTHealth and Memorial Hermann Hospital, Houston, TX 77030, USA
| | - Keith G Oldroyd
- West of Scotland Regional Heart & Lung Centre, Golden Jubilee National Hospital and Institute of Cardiovascular and Medical Sciences, University of Glasgow, Agamemnon Street, Glasgow G81 4DY, UK
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Rivero F, Gutiérrez-Barrios A, Gomez-Lara J, Fuentes-Ferrer M, Cuesta J, Keulards DCJ, Pardo-Sanz A, Bastante T, Izaga-Torralba E, Gomez-Hospital JA, García-Guimaraes M, Pijls NHJ, Alfonso F. Coronary microvascular dysfunction assessed by continuous intracoronary thermodilution: A comparative study with index of microvascular resistance. Int J Cardiol 2021; 333:1-7. [PMID: 33684380 DOI: 10.1016/j.ijcard.2021.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/12/2021] [Accepted: 03/01/2021] [Indexed: 01/16/2023]
Abstract
BACKGROUND This study aimed to assess the correlation between the standard of care, the index of microvascular resistance (IMR) versus the novel microvascular resistance (Rmicro) and to determine the pathologic cut-off value in a selected population with suspected coronary microvascular dysfunction (CMD). METHODS One-hundred and twenty patients with high clinical suspicion of CMD due to ischemic symptoms in the absence of significant epicardial coronary lesions were prospectively included. Following a standardized systematic protocol, coronary flow reserve, IMR, fractional flow reserve, Q and Rmicro were measured in the left anterior descending coronary artery using a temperature/pressure sensor-tipped guidewire and a dedicated infusion catheter. RESULTS There was a high prevalence of CMD with 50 (42%) patients showing an IMR ≥ 25. Median IMR was 23 [IQR: 14-34] and median Rmicro was 464 Woods Units (WU) [IQR: 354-636WU]. ROC analyses identified 500 WU as the optimal Rmicro cut-off to identify patients with an IMR ≥ 25, with an area under the ROC curve (C statistic) of 0.83 (95% CI: 0.74 to 0.89, p < 0.0001). CONCLUSIONS Rmicro derived from continuous intracoronary thermodilution is an accurate index to measure microvascular resistances enabling the invasive diagnostic of CMD.
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Affiliation(s)
- Fernando Rivero
- Hospital Universitario de la Princesa, IIS-IP, CIBERCV, Madrid, Spain
| | | | - Josep Gomez-Lara
- Hospital Universitari de Bellvitge, Institut d' Investigació Biomèdica de Bellvitge (IDIBELL), Universitat de Barcelona, L' Hospitalet de Llobregat, Spain
| | - Manuel Fuentes-Ferrer
- Department of Preventive Medicine, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
| | - Javier Cuesta
- Hospital Universitario de la Princesa, IIS-IP, CIBERCV, Madrid, Spain
| | | | | | - Teresa Bastante
- Hospital Universitario de la Princesa, IIS-IP, CIBERCV, Madrid, Spain
| | | | - Joan-Antoni Gomez-Hospital
- Hospital Universitari de Bellvitge, Institut d' Investigació Biomèdica de Bellvitge (IDIBELL), Universitat de Barcelona, L' Hospitalet de Llobregat, Spain
| | - Marcos García-Guimaraes
- Servicio de Cardiología, Hospital del Mar - Parc de Salut Mar, Barcelona, Grupo de Investigación Biomédica en Enfermedades del Corazón, IMIM (Instituto Hospital del Mar de Investigaciones Médicas), Barcelona, Spain
| | - Nico H J Pijls
- Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands
| | - Fernando Alfonso
- Hospital Universitario de la Princesa, IIS-IP, CIBERCV, Madrid, Spain.
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Keulards DCJ, Bouwmeester S, de Vos AMJ, Dekker LRC, Pijls NHJ, Houthuizen P. High microvascular resistance and reduced left atrial strain in patients with coronary microvascular dysfunction: The micro-strain study. Int J Cardiol 2021; 333:21-28. [PMID: 33675889 DOI: 10.1016/j.ijcard.2021.02.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/16/2021] [Accepted: 02/19/2021] [Indexed: 01/01/2023]
Abstract
BACKGROUND It is already known that high coronary microvascular resistance (Rμ) is linked to altered left ventricular stiffness and might be an early indicator of heart failure with preserved ejection fraction (HFpEF). Left atrial dysfunction, on the other hand, varies according to the grade of left ventricular diastolic dysfunction. This is the first study to use the latest development for invasive assessment of Rμ and to combine it with echocardiographic assessment of left atrial strain during reservoir phase (LASr) by speckle tracking in relation to left ventricular (LV) diastolic function. METHODS AND RESULTS An invasive angiogram was performed in 97 patients because of suspected ANOCA. All patients underwent comprehensive echocardiography, yet image quality was poor in 15 patients leaving 82 patients to include in the final analysis. In order to compare Rμ with LASr values, patients were divided into 4 groups based upon normal values of Rμ as defined by Fournier et al. The mean LASr was plotted against the four resistance groups. The LASr was 48.6% in the lowest resistance group, and 40.1%, 36.3% and 30.1% in the low intermediate, high intermediate and high resistance group respectively. These differences were significant compared to the lowest resistance group (p < 0.05). Although higher Rμ groups showed more diastolic dysfunction, LASr was already decreased irrespective of the severity of diastolic dysfunction. CONCLUSION This study shows a relationship between increased Rμ and reduced LASr, that seems to precede conventional measures of left ventricular diastolic dysfunction. This suggests that microvascular dysfunction might be an early indicator for the development of impaired LA function.
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Affiliation(s)
| | | | | | - Lukas R C Dekker
- Catharina Hospital, Eindhoven, the Netherlands; Eindhoven University of Technology, the Netherlands
| | - Nico H J Pijls
- Catharina Hospital, Eindhoven, the Netherlands; Eindhoven University of Technology, the Netherlands
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Gutiérrez-Barrios A, Izaga-Torralba E, Rivero Crespo F, Gheorghe L, Cañadas-Pruaño D, Gómez-Lara J, Silva E, Noval-Morillas I, Zayas Rueda R, Calle-Pérez G, Vázquez-García R, Alfonso F. Continuous Thermodilution Method to Assess Coronary Flow Reserve. Am J Cardiol 2021; 141:31-37. [PMID: 33220317 DOI: 10.1016/j.amjcard.2020.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 11/30/2022]
Abstract
Coronary flow reserve (CFR) is a well-validated flow-based physiological parameter that has shown value in clinical risk stratification. CFR can be invasively assessed, classically by Doppler and, more recently, by thermodilution with saline boluses (CFRthermo-bolus). Alternatively, continuous thermodilution is a novel operator-independent, highly-reproducible technique to invasively quantify maximum absolute coronary flow (AF). This study aimed to assess the feasibility of this method to quantify resting AF and to determine CFR (CFRThermo-infusion) as compared with CFRthermo-bolus. Sixty-two consecutive patients with suspicion of coronary disease and absence of significant epicardial lesions were prospectively investigated. AF at maximal hyperemia (20 mL/min) and at lower infusion rates (6-8-10-12 mL/min) were systematically measured using a dedicated catheter and a temperature/pressure guidewire. The absence of baseline Pd/Pa decrease at 6 (0.15 ± 0.2%), 8 (0.17 ± 0.18%) and 10 mL/min (0.2 ± 0.12%) demonstrated absence of hyperemia at ≤10 mL/min (all p = NS). However, at 12 mL/min hyperemia was confirmed by a significant decrease in Pd/Pa (1.3 ± 1.5%, p <0.01) and increase in AF from 10 mL/min to 12 mL/min (31.4 ± 28.1 mL, p <0.05). All curve tracings at 10 mL/min (129/129, 100%) were adequate versus only (7/15, 53%) and (15/18, 17%) at 6 mL/min, and 8 mL/min, respectively, and this infusion-rate was considered to determine resting-AF. CFRThermo-infusion was determined as the ratio of hyperemic-AF (20 mL/min) by resting-AF (10 mL/min). Mean CFRThermo-infusion was 2.56 ± 0.9 and CFRthermo-bolus 2.49 ± 1. Both parameters showed a good correlation (r = 0.76; p <0.001) and intraclass agreement (ICC = 0.76; p <0.001).The continuous thermodilution method enables to quantify resting-AF providing a novel clinical tool to determine CRF. CFRThermo-infusion shows a good correlation with CFRthermo-bolus..
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Affiliation(s)
- Alejandro Gutiérrez-Barrios
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain.
| | | | | | - Livia Gheorghe
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | - Dolores Cañadas-Pruaño
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | | | - Etelvino Silva
- Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | - Inmaculada Noval-Morillas
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | - Ricardo Zayas Rueda
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | - Germán Calle-Pérez
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | - Rafael Vázquez-García
- Cardiology Department, Hospital Puerta del Mar, Cádiz, Spain; Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Spain
| | - Fernando Alfonso
- Cardiology Department, Hospital Universitario de la Princesa, Madrid, Spain
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Konst RE, Elias-Smale SE, Pellegrini D, Hartzema-Meijer M, van Uden BJC, Jansen TPJ, Vart P, Gehlmann H, Maas AHEM, van Royen N, Damman P. Absolute Coronary Blood Flow Measured by Continuous Thermodilution in Patients With Ischemia and Nonobstructive Disease. J Am Coll Cardiol 2021; 77:728-741. [PMID: 33573743 DOI: 10.1016/j.jacc.2020.12.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND Intracoronary continuous thermodilution is a novel technique to quantify absolute coronary flow (Q) and resistance (R) and has potential advantages over current methods such as coronary flow reserve (CFR) and index of microvascular resistance (IMR). However, no data are available in patients with ischemia and nonobstructive coronary artery disease (INOCA). OBJECTIVES This study aimed to assess the relationship of Q and R with the established CFR/IMR in INOCA patients, to explore the potential of absolute Q, and to predict self-reported angina. METHODS Consecutive INOCA patients (n = 84; 87% women; mean age 56 ± 8 years) underwent coronary function testing, including acetylcholine (ACH) provocation testing, adenosine (ADE) testing (CFR/IMR), and continuous thermodilution (absolute Q and R) with saline-induced hyperemia. RESULTS ACH testing was abnormal (ACH+) in 87%, and ADE testing (ADE+) in 38%. The median absolute Q was 198 ml/min, and the median absolute R was 416 WU. The absolute R was higher in patients with ADE+ versus ADE- (495 WU vs. 375 WU; p = 0.04) but did not differ between patients with ACH+ versus ACH- (421 WU vs. 409 WU; p = 0.74). Low Q and high R were associated with severe angina (odds ratio: 3.09; 95% confidence interval: 1.16 to 8.28; p = 0.03; and odds ratio: 2.60; 95% confidence interval: 0.99 to 6.81; p = 0.05), respectively. CONCLUSIONS In this study, absolute R was higher in patients with abnormal CFR/IMR, whereas both Q and R were unrelated to coronary vasospasm. Q and R were associated with angina, although their exact predictive value should be determined in larger studies.
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Affiliation(s)
- Regina E Konst
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Suzette E Elias-Smale
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | | | | | - Bas J C van Uden
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Tijn P J Jansen
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Priya Vart
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Health Evidence, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Helmut Gehlmann
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Angela H E M Maas
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Niels van Royen
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Peter Damman
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands.
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Keulards DCJ, Vlaar PJ, Wijnbergen I, Pijls NHJ, Teeuwen K. Coronary physiology before and after chronic total occlusion treatment: what does it tell us? Neth Heart J 2021; 29:22-29. [PMID: 32720123 PMCID: PMC7782651 DOI: 10.1007/s12471-020-01470-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Studies performed in the last two decades demonstrate that after successful percutaneous coronary intervention (PCI) of a chronically occluded coronary artery, the physiology of the chronic total occlusion (CTO) vessel and dependent microvasculature does not normalise immediately but improves significantly over time. Generally, there is an increase in fractional flow reserve (FFR) in the CTO artery, a decrease in collateral blood supply and an increase in FFR in the donor artery accompanied by an increase in blood flow and decrease in microvascular resistance in the myocardium supplied by the CTO vessel. Analogous to these physiological changes, positive remodelling of the distal CTO artery also occurs over time, and intravascular imaging can be helpful for analysing distal vessel parameters. Follow-up coronary angiography with physiological measurements after several weeks to months can be helpful and informative in a subset of patients in order to decide upon the necessity for treatment of residual coronary artery stenosis in the vessel distal to the CTO or in the contralateral donor artery, as well as in deciding whether stent optimisation is indicated. We suggest that such physiological guidance of CTO procedures avoids unnecessary overtreatment during the initial procedure, guides interventions at follow-up, and improves our understanding of what PCI in CTO means.
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Affiliation(s)
| | - P J Vlaar
- Catharina Hospital, Eindhoven, The Netherlands
| | | | - N H J Pijls
- Catharina Hospital, Eindhoven, The Netherlands
- Eindhoven University of Technology, Eindhoven, The Netherlands
| | - K Teeuwen
- Catharina Hospital, Eindhoven, The Netherlands
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Lüscher TF. The heart and the brain: cardiovascular risk factors, atrial fibrillation, and dementia. Eur Heart J 2020; 40:2271-2275. [PMID: 33215642 DOI: 10.1093/eurheartj/ehz508] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Affiliation(s)
- Thomas F Lüscher
- Imperial College and Director of Research, Education & Development, Royal Brompton and Harefield Hospitals London, UK.,Center for Molecular Cardiology, University of Zurich, Switzerland.,Editor-in-Chief, EHJ Editorial Office, Zurich Heart House, Hottingerstreet 14, Zurich, Switzerland
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Thermodilution-Based Invasive Assessment of Absolute Coronary Blood Flow and Microvascular Resistance: Quantification of Microvascular (Dys)Function? J Interv Cardiol 2020; 2020:5024971. [PMID: 33293902 PMCID: PMC7688370 DOI: 10.1155/2020/5024971] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 10/09/2020] [Accepted: 10/23/2020] [Indexed: 02/04/2023] Open
Abstract
During the last two decades, there has been a sharp increase in both interest and knowledge about the coronary microcirculation. Since these small vessels are not visible by the human eye, physiologic measurements should be used to characterize their function. The invasive methods presently used (coronary flow reserve (CFR) and index of microvascular resistance (IMR)) are operator-dependent and mandate the use of adenosine to induce hyperemia. In recent years, a new thermodilution-based method for measurement of absolute coronary blood flow and microvascular resistance has been proposed and initial procedural problems have been overcome. Presently, the technique is easy to perform using the Rayflow infusion catheter and the Coroventis software. The method is accurate, reproducible, and completely operator-independent. This method has been validated noninvasively against the current golden standard for flow assessment: Positron Emission Tomography-Computed Tomography (PET-CT). In addition, absolute flow and resistance measurements have proved to be safe, both periprocedurally and at long-term follow-up. With an increasing number of studies being performed, this method has great potential for better understanding and quantification of microvascular disease.
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Konstantinou K, Karamasis GV, Davies JR, Alsanjari O, Tang KH, Gamma RA, Kelly PR, Pijls NH, Keeble TR, Clesham GJ. Absolute microvascular resistance by continuous thermodilution predicts microvascular dysfunction after ST-elevation myocardial infarction. Int J Cardiol 2020; 319:7-13. [DOI: 10.1016/j.ijcard.2020.06.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/31/2020] [Accepted: 06/24/2020] [Indexed: 12/26/2022]
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