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Jo HH, Kang DY, Lee JM, Lim SM, Park YS, Choi Y, Kim H, Lee J, Ahn JM, Park DW, Park SJ. Evaluation of Instantaneous Wave-Free Ratio and Fractional Flow Reserve in Severe Aortic Valve Stenosis. Circ Cardiovasc Interv 2024; 17:e013237. [PMID: 38629298 DOI: 10.1161/circinterventions.123.013237] [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: 05/10/2023] [Accepted: 02/08/2024] [Indexed: 04/30/2024]
Abstract
BACKGROUND The optimal functional evaluation of coronary artery stenosis in patients with severe aortic stenosis (AS) has not been established. The objective of the study was to evaluate the instantaneous wave-free ratio (iFR) and fractional flow reserve (FFR) in patients with and without severe AS. METHODS We retrospectively investigated 395 lesions in 293 patients with severe AS and 2257 lesions in 1882 patients without severe AS between 2010 and 2022 from a subgroup of the Interventional Cardiology Research In-Cooperation Society FFR Registry. All patients had FFR values, and iFR was analyzed post hoc using dedicated software only in lesions with adequate resting pressure curves (311 lesions in patients with severe AS and 2257 lesions in patients with nonsevere AS). RESULTS The incidence of iFR ≤0.89 was 66.6% and 31.8% (P<0.001), while the incidence of FFR ≤0.80 was 45.3% and 43.9% (P=0.60) in the severe AS group and the nonsevere AS group, respectively. In the severe AS group, most lesions (95.2%) with iFR >0.89 had FFR >0.80, while 36.2% of lesions with iFR ≤0.89 had FFR >0.80. During a median follow-up of 2 years, FFR ≤0.80 was significantly associated with deferred lesion failure (adjusted hazard ratio, 2.71 [95% CI, 1.08-6.80]; P=0.034), while iFR ≤0.89 showed no prognostic value (adjusted hazard ratio, 1.31 [95% CI, 0.47-3.60]; P=0.60) in the severe AS group. Lesions with iFR ≤0.89 and FFR >0.80, in particular, were not associated with a higher rate of deferred lesion failure at 3 years compared with lesions with iFR >0.89 (15.4% versus 17.0%; P=0.58). CONCLUSIONS This study suggested that FFR appears to be less affected by the presence of severe AS and is more associated with prognosis. iFR may overestimate the functional severity of coronary artery disease without prognostic significance, yet it can be useful for excluding significant stenosis in patients with severe AS.
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Affiliation(s)
- Ha Hye Jo
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Do-Yoon Kang
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Joong Min Lee
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - So-Min Lim
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Young-Sun Park
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Yeonwoo Choi
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Hoyun Kim
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Jinho Lee
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Jung-Min Ahn
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Duk-Woo Park
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Seung-Jung Park
- Division of Cardiology, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
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Ribichini F, Pesarini G, Fabris T, Lunardi M, Barbierato M, D'Amico G, Zanchettin C, Gregori D, Piva T, Nicolini E, Gandolfo C, Fineschi M, Petronio AS, Berti S, Caprioglio F, Saia F, Sclafani R, Esposito G, D'Ascenzo F, Tarantini G. A randomised multicentre study of angiography- versus physiologyguided percutaneous coronary intervention in patients with coronary artery disease undergoing TAVI: design and rationale of the FAITAVI trial. EUROINTERVENTION 2024; 20:e504-e510. [PMID: 38629420 PMCID: PMC11017223 DOI: 10.4244/eij-d-23-00679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 01/16/2024] [Indexed: 04/19/2024]
Abstract
The treatment of coronary artery disease (CAD) in patients with severe aortic valve stenosis (AVS) eligible for transcatheter aortic valve implantation (TAVI) is not supported by clinical evidence, and the role of physiology over anatomy as well as the timing of coronary intervention are not defined. FAITAVI (ClinicalTrials.gov: NCT03360591) is a nationwide prospective, open-label, multicentre, randomised controlled study comparing the angiography-guided versus the physiology-guided coronary revascularisation strategy in patients with combined significant CAD and severe AVS undergoing TAVI. Significant CAD will be defined as coronary stenosis ≥50%, as assessed by visual estimation in vessels ≥2.5 mm. Physiology will be tested by fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR). The study will be conducted at 15 sites in Italy. In the angiography arm, percutaneous coronary intervention (PCI) will be performed either before TAVI, during the TAVI procedure - before or after the valve implantation - or within 1 month±5 days of the valve implantation, left to the operator's decision. In the physiology arm, FFR and iFR will be performed before TAVI, and PCI will be indicated for FFR ≤0.80, otherwise the intervention will be deferred. In case of borderline values (0.81-0.85), FFR and iFR will be repeated after TAVI, with PCI performed when needed. With a sample size of 320 patients, the study is powered to evaluate the primary endpoint (a composite of death, myocardial infarction, stroke, major bleeding, or ischaemia-driven target vessel revascularisation). TAVI indication, strategy and medical treatment will be the same in both groups. After discharge, patients will be contacted at 1, 6, 12 and 24 months after the procedure to assess their general clinical status, and at 12 months for the occurrence of events included in the primary and secondary endpoints. FAITAVI is the first randomised clinical trial to investigate "optimal" percutaneous coronary intervention associated with TAVI in patients with severe AVS and CAD.
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Affiliation(s)
- Flavio Ribichini
- Department of Medicine, Division of Cardiology, University of Verona, Verona, Italy
| | - Gabriele Pesarini
- Department of Medicine, Division of Cardiology, University of Verona, Verona, Italy
| | - Tommaso Fabris
- Department of Cardiac, Thoracic and Vascular Science, University of Padova, Padova, Italy
| | - Mattia Lunardi
- Department of Medicine, Division of Cardiology, University of Verona, Verona, Italy
| | - Marco Barbierato
- Division of Cardiology, Ospedale dell'Angelo di Mestre, Chirignago-Zelarino, Italy
| | - Gianpiero D'Amico
- Division of Cardiology, Ospedale dell'Angelo di Mestre, Chirignago-Zelarino, Italy
| | - Chiara Zanchettin
- Department of Cardiac, Thoracic and Vascular Science, University of Padova, Padova, Italy
- Division of Cardiology, Ospedale dell'Angelo di Mestre, Chirignago-Zelarino, Italy
| | - Dario Gregori
- Department of Cardiac, Thoracic and Vascular Science, University of Padova, Padova, Italy
| | - Tommaso Piva
- Division of Cardiology, Azienda Ospedaliero Universitaria delle Marche, Ancona, Italy
| | - Elisa Nicolini
- Division of Cardiology, Azienda Ospedaliero Universitaria delle Marche, Ancona, Italy
| | | | - Massimo Fineschi
- Division of Cardiology, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Anna Sonia Petronio
- Division of Cardiology, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy
| | - Sergio Berti
- Division of Cardiology, Ospedale del Cuore - Fondazione Monasterio, Massa, Italy
| | | | - Francesco Saia
- Division of Cardiology, Policlinico S. Orsola-Malpighi, Bologna, Italy
| | - Rocco Sclafani
- Division of Cardiology, Azienda Ospedaliera di Perugia - Ospedale S. Maria della Misericordia, Perugia, Italy
| | - Giovanni Esposito
- Division of Cardiology, Policlinico Universitario Federico II di Napoli, Napoli, Italy
| | - Fabrizio D'Ascenzo
- Division of Cardiology, Department of Medical Sciences, Città della Salute e della Scienza, Hospital University of Turin, Torino, Italy
| | - Giuseppe Tarantini
- Department of Cardiac, Thoracic and Vascular Science, University of Padova, Padova, Italy
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3
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Tehrani DM, Seto AH. Is Coronary Physiology Assessment Valid in Special Circumstances?: Aortic Stenosis, Atrial Fibrillation, Left Ventricular Hypertrophy, and Other. Cardiol Clin 2024; 42:21-29. [PMID: 37949537 DOI: 10.1016/j.ccl.2023.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Fractional flow reserve (FFR) and nonhyperemic pressure ratios (NHPRs) provide an important clinical tool to evaluate the hemodynamic significance of coronary lesions. However, these indices have major limitations. As these indices are meant to be surrogates of coronary flow, clinical scenarios such as aortic stenosis (with increased end-systolic and end-diastolic pressures) or atrial fibrillation (with significant beat-to-beat cardiac output variability) can have significant effect on the accuracy and reliability of these hemodynamic indices. Here, we provide a comprehensive evaluation of the pitfalls, limitations, and strengths of FFR and NHPRs in common clinical scenarios paired with coronary artery disease.
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Affiliation(s)
- David M Tehrani
- Ronald Reagan UCLA Medical Center, 650 Charles East Young Drive South, CHS A2-237, Los Angeles, CA 90095-1679, USA.
| | - Arnold H Seto
- Long Beach Veterans Administration Medical Center, 5901 East 7th Street, 111C, Long Beach, CA 90822, USA. https://twitter.com/arnoldseto
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Koo BK, Hwang D, Park S, Kuramitsu S, Yonetsu T, Kim CH, Zhang J, Yang S, Doh JH, Jeong YH, Choi KH, Lee JM, Ahn JM, Matsuo H, Shin ES, Hu X, Low AF, Kubo T, Nam CW, Yong AS, Harding SA, Xu B, Hur SH, Choo GH, Tan HC, Mullasari A, Hsieh IC, Kakuta T, Akasaka T, Wang J, Tahk SJ, Fearon WF, Escaned J, Park SJ. Practical Application of Coronary Physiologic Assessment: Asia-Pacific Expert Consensus Document: Part 2. JACC. ASIA 2023; 3:825-842. [PMID: 38155788 PMCID: PMC10751650 DOI: 10.1016/j.jacasi.2023.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 07/08/2023] [Indexed: 12/30/2023]
Abstract
Coronary physiologic assessment is performed to measure coronary pressure, flow, and resistance or their surrogates to enable the selection of appropriate management strategy and its optimization for patients with coronary artery disease. The value of physiologic assessment is supported by a large body of clinical data that has led to major recommendations in all practice guidelines. This expert consensus document aims to convey practical and balanced recommendations and future perspectives for coronary physiologic assessment for physicians and patients in the Asia-Pacific region, based on updated information in the field that includes both wire- and image-based physiologic assessment. This is Part 2 of the whole consensus document, which provides theoretical and practical information on physiologic indexes for specific clinical conditions and patient statuses.
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Affiliation(s)
- Bon-Kwon Koo
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
| | - Doyeon Hwang
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
| | - Sungjoon Park
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
| | - Shoichi Kuramitsu
- Department of Cardiovascular Medicine, Sapporo Heart Center, Sapporo Cardio Vascular Clinic, Sapporo, Japan
| | - Taishi Yonetsu
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chee Hae Kim
- Department of Internal Medicine and Cardiovascular Center, Dongguk University Ilsan Hospital, Goyang, Korea
| | - Jinlong Zhang
- Department of Cardiology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Seokhun Yang
- Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea
| | - Joon-Hyung Doh
- Department of Medicine, Inje University Ilsan Paik Hospital, Goyang, Korea
| | - Young-Hoon Jeong
- CAU Thrombosis and Biomarker Center, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea and Department of Internal Medicine, Chung-Ang University School of Medicine, Seoul, Korea
| | - Ki Hong Choi
- Division of Cardiology, Department of Internal Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Joo Myung Lee
- Division of Cardiology, Department of Internal Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jung-Min Ahn
- Division of Cardiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hitoshi Matsuo
- Department of Cardiovascular Medicine, Gifu Heart Center, Japan
| | - Eun-Seok Shin
- Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Xinyang Hu
- Department of Cardiology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Adrian F. Low
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore; National University Heart Centre, National University Health System, Singapore
| | - Takashi Kubo
- Department of Cardiology, Tokyo Medical University, Hachioji Medical Center, Tokyo, Japan
| | - Chang-Wook Nam
- Department of Internal Medicine and Cardiovascular Research Institute, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Andy S.C. Yong
- Department of Cardiology, Concord Hospital, University of Sydney, Sydney, Australia
| | - Scott A. Harding
- Department of Cardiology, Wellington Hospital, Wellington, New Zealand
| | - Bo Xu
- Department of Cardiology, National Clinical Research Center for Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Seung-Ho Hur
- Department of Internal Medicine and Cardiovascular Research Institute, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Gim Hooi Choo
- Department of Cardiology, Cardiac Vascular Sentral KL (CVSKL), Kuala Lumpur, Malaysia
| | - Huay Cheem Tan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore; National University Heart Centre, National University Health System, Singapore
| | - Ajit Mullasari
- Department of Cardiology, Madras Medical Mission, Chennai, India
| | - I-Chang Hsieh
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou and Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Tsunekazu Kakuta
- Division of Cardiovascular Medicine, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Takashi Akasaka
- Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Jian'an Wang
- Department of Cardiology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Seung-Jea Tahk
- Department of Cardiology, Ajou University Medical Center, Suwon, Korea
| | - William F. Fearon
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Palo Alto, California, USA
| | - Javier Escaned
- Hospital Clinico San Carlos IDISSC, Complutense University of Madrid, Madrid, Spain
| | - Seung-Jung Park
- Division of Cardiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Fezzi S, Ding D, Scarsini R, Huang J, Del Sole PA, Zhao Q, Pesarini G, Simpkin A, Wijns W, Ribichini F, Tu S. Integrated Assessment of Computational Coronary Physiology From a Single Angiographic View in Patients Undergoing TAVI. Circ Cardiovasc Interv 2023; 16:e013185. [PMID: 37712285 DOI: 10.1161/circinterventions.123.013185] [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: 04/18/2023] [Accepted: 07/31/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND Angiography-derived computational physiology is an appealing alternative to pressure-wire coronary physiology assessment. However, little is known about its reliability in the setting of severe aortic stenosis. This study sought to provide an integrated assessment of epicardial and microvascular coronary circulation by means of single-view angiography-derived physiology in patients with severe aortic stenosis undergoing transcatheter aortic valve implantation (TAVI). METHODS Pre-TAVI angiographic projections of 198 stenotic coronary arteries (123 patients) were analyzed by means of Murray's law-based quantitative flow ratio and angiography microvascular resistance. Wire-based reference measurements were available for comparison: fractional flow reserve (FFR) in all cases, instantaneous wave-free ratio in 148, and index of microvascular resistance in 42 arteries. RESULTS No difference in terms of the number of ischemia-causing stenoses was detected between FFR ≤0.80 and Murray's law-based quantitative flow ratio ≤0.80 (19.7% versus 19.2%; P=0.899), while this was significantly higher when instantaneous wave-free ratio ≤0.89 (44.6%; P=0.001) was used. The accuracy of Murray's law-based quantitative flow ratio ≤0.80 in predicting pre-TAVI FFR ≤0.80 was significantly higher than the accuracy of instantaneous wave-free ratio ≤0.89 (93.4% versus 77.0%; P=0.001), driven by a higher positive predictive value (86.9% versus 50%). Similar findings were observed when considering post-TAVI FFR ≤0.80 as reference. In 82 cases with post-TAVI angiographic projections, Murray's law-based quantitative flow ratio values remained stable, with a low rate of reclassification of stenosis significance (9.9%), similar to FFR and instantaneous wave-free ratio. Angiography microvascular resistance demonstrated a significant correlation (Rho=0.458; P=0.002) with index of microvascular resistance, showing an area under the curve of 0.887 (95% CI, 0.752-0.964) in predicting index of microvascular resistance ≥25. CONCLUSIONS Angiography-derived physiology provides a valid, reliable, and systematic assessment of the coronary circulation in a complex scenario, such as severe aortic stenosis.
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Affiliation(s)
- Simone Fezzi
- Department of Medicine, Division of Cardiology, University of Verona, Italy (S.F., R.S., P.A.D.S., G.P., F.R.)
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, University of Galway, Ireland (S.F., D.D., J.H., W.W.)
| | - Daixin Ding
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, University of Galway, Ireland (S.F., D.D., J.H., W.W.)
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, China (D.D., J.H., S.T.)
| | - Roberto Scarsini
- Department of Medicine, Division of Cardiology, University of Verona, Italy (S.F., R.S., P.A.D.S., G.P., F.R.)
| | - Jiayue Huang
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, University of Galway, Ireland (S.F., D.D., J.H., W.W.)
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, China (D.D., J.H., S.T.)
| | - Paolo Alberto Del Sole
- Department of Medicine, Division of Cardiology, University of Verona, Italy (S.F., R.S., P.A.D.S., G.P., F.R.)
| | - Qiang Zhao
- Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, China (Q.Z.)
| | - Gabriele Pesarini
- Department of Medicine, Division of Cardiology, University of Verona, Italy (S.F., R.S., P.A.D.S., G.P., F.R.)
| | - Andrew Simpkin
- School of Mathematical and Statistical Sciences, University of Galway, Ireland (A.S.)
| | - William Wijns
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, University of Galway, Ireland (S.F., D.D., J.H., W.W.)
| | - Flavio Ribichini
- Department of Medicine, Division of Cardiology, University of Verona, Italy (S.F., R.S., P.A.D.S., G.P., F.R.)
| | - Shengxian Tu
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, China (D.D., J.H., S.T.)
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Yang J, Huang Y, Li X, Jia Q, Deng H, Xie N, Huang M, Fei H. The effects of cardiac structure, valvular regurgitation, and left ventricular diastolic dysfunction on the diagnostic accuracy of Murray law-based quantitative flow ratio. Front Cardiovasc Med 2023; 10:1134623. [PMID: 37293286 PMCID: PMC10246742 DOI: 10.3389/fcvm.2023.1134623] [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: 12/30/2022] [Accepted: 05/08/2023] [Indexed: 06/10/2023] Open
Abstract
Objective The study aimed to investigate the diagnostic accuracy of Murray law-based quantitative flow ratio (μQFR) from a single angiographic view in patients with abnormal cardiac structure, left ventricular diastolic dysfunction, and valvular regurgitation. Background μQFR is a novel fluid dynamics method for deriving fractional flow reserve (FFR). In addition, current studies of μQFR mainly analyzed patients with normal cardiac structure and function. The accuracy of μQFR when patients had abnormal cardiac structure, left ventricular diastolic dysfunction, and valvular regurgitation has not been clear. Methods This study retrospectively analyzed 261 patients with 286 vessels that underwent both FFR and μQFR prior to intervention. The cardiac structure and function were measured using echocardiography. Pressure wire-derived FFR ≤0.80 was defined as hemodynamically significant coronary stenosis. Results μQFR had a moderate correlation with FFR (r = 0.73, p < 0.001), and the Bland-Altman plot presented no difference between the μQFR and FFR (0.006 ± 0.075, p = 0.192). With FFR as the standard, the diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of μQFR were 94.06% (90.65-96.50), 82.56% (72.87-89.90), 99.00% (96.44-99.88), 97.26 (89.91-99.30), and 92.96% (89.29-95.44), respectively. The concordance of μQFR/FFR was not associated with abnormal cardiac structure, valvular regurgitation (aortic valve, mitral valve, and tricuspid valve), and left ventricular diastolic function. Coronary hemodynamics showed no difference between normality and abnormality of cardiac structure and left ventricular diastolic function. Coronary hemodynamics demonstrated no difference among valvular regurgitation (none, mild, moderate, or severe). Conclusion μQFR showed an excellent agreement with FFR. The effect of abnormal cardiac structure, valvular regurgitation, and left ventricular diastolic function did not correlate with the diagnostic accuracy of μQFR. Coronary hemodynamics showed no difference in patients with abnormal cardiac structure, valvular regurgitation, and left ventricular diastolic function.
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Affiliation(s)
- Junqing Yang
- Department of Cardiology, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Yuming Huang
- Department of Catheterization Lab, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Xiaoshan Li
- Guangdong Medical University, Zhanjiang, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Qianjun Jia
- Department of Catheterization Lab, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Huiliang Deng
- Department of Catheterization Lab, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Nianjin Xie
- Department of Cardiology, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Meiping Huang
- Department of Catheterization Lab, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Hongwen Fei
- Guangdong Medical University, Zhanjiang, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
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Sabbah M, Engstrøm T, Lønborg J. Invasive pressure indices in aortic stenosis: the key role of resting flow after valve replacement. Front Cardiovasc Med 2023; 10:1179346. [PMID: 37283570 PMCID: PMC10239970 DOI: 10.3389/fcvm.2023.1179346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 05/08/2023] [Indexed: 06/08/2023] Open
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Kern MJ, Seto AH. Understanding the mechanism of improved CFR after TAVR/SAVR - the importance of basal flow. EUROINTERVENTION 2023; 18:1129-1130. [PMID: 36861264 PMCID: PMC9936251 DOI: 10.4244/eij-e-22-00052] [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: 02/19/2023]
Affiliation(s)
- Morton J Kern
- Veteran's Administration Long Beach Health Care System, Long Beach, CA, USA
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Sabbah M, Olsen NT, Holmvang L, Tilsted HH, Pedersen F, Joshi FR, Sørensen R, Jabbari R, Arslani K, Sondergaard L, Engstrøm T, Lønborg JT. Long-term changes in coronary physiology after aortic valve replacement. EUROINTERVENTION 2023; 18:1156-1164. [PMID: 36239118 PMCID: PMC9940233 DOI: 10.4244/eij-d-22-00621] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 09/01/2022] [Indexed: 02/19/2023]
Abstract
BACKGROUND The detrimental effects of long-standing severe aortic stenosis (AS) often include left ventricular hypertrophy (LVH) and exhaustion of coronary flow reserve (CFR), the reversibility of which is unclear after valve replacement. AIMS Our aims were to 1) investigate whether CFR in the left anterior descending artery (LAD) would improve following valve replacement, and if the change was related to changes in hyperaemic coronary flow (QLAD) and minimal microvascular resistance (Rμ,LAD); and 2) investigate the relationship between changes in CFR and changes in left ventricular mass (LVM) and stroke work (LVSW). METHODS We measured intracoronary bolus thermodilution-derived CFR, and continuous thermodilution-derived QLAD and Rμ,LAD before and 6 months after aortic valve replacement. Cardiac magnetic resonance imaging was used to quantify left ventricular anatomy and function for the calculation of LVM and LVSW. Results: Thirty-four patients were included (17 patients had transcatheter aortic valve implantation; 14 had surgical valve replacement with a bioprosthesis and 3 with a mechanical prosthesis) who underwent invasive assessment in the LAD. CFR increased from 2.5 (interquartile range [IQR] 1.5-3.3) at baseline to 3.1 (IQR 2.2-5.1) at follow-up (p=0.005), despite no significant change in QLAD (230±106 mL/min to 250±101 mL/min; p=0.26) or Rμ,LAD (347 [IQR 247-463] to 287 [IQR 230-456]; p=0.20). When indexed for LVM, QLAD was 39% (IQR 8-98%) higher at follow-up compared with baseline (p<0.001). The improvement in CFR was correlated with ΔLVSW, r= -0.39; p=0.047. Conclusions: CFR in the LAD increased significantly at follow-up although global hyperaemic flow and minimal microvascular resistance remained unchanged. Thus, a decrease in resting flow was the cause of CFR improvement. CFR improvement was associated with reduction in LVSW.
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Affiliation(s)
- Muhammad Sabbah
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Niels T Olsen
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Lene Holmvang
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Hans-Henrik Tilsted
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Frants Pedersen
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Francis Richard Joshi
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Rikke Sørensen
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Reza Jabbari
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Ketina Arslani
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Lars Sondergaard
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Engstrøm
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Jacob Thomsen Lønborg
- Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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10
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Yamanaka F, Shishido K, Yokota S, Moriyama N, Ochiai T, Yamada T, Hayashi T, Miyashita H, Yokoyama H, Yamanaga K, Tabata N, Yamaguchi M, Yamagishi T, Matsumoto T, Tobita K, Mizuno S, Tanaka Y, Murakami M, Takahashi S, Saito S, Tsujita K. Discordance between fractional flow reserve and instantaneous wave-free ratio in patients with severe aortic stenosis: A retrospective cohort study. J Cardiol 2023; 81:138-143. [PMID: 36057484 DOI: 10.1016/j.jjcc.2022.08.005] [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: 05/05/2022] [Revised: 07/31/2022] [Accepted: 08/03/2022] [Indexed: 01/10/2023]
Abstract
BACKGROUND Discordance between fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) occurs in approximately 20 % of cases. However, no studies have reported the discordance in patients with severe aortic stenosis (AS). We aimed to evaluate the diagnostic discordance between FFR and iFR in patients with severe AS. METHODS We examined 140 consecutive patients with severe AS (164 intermediate coronary artery stenosis vessels). FFR and iFR were calculated in four quadrants based on threshold FFR and iFR values of ≤0.8 and ≤0.89, respectively (Group 1: iFR >0.89, FFR >0.80; Group 2: iFR ≤0.89, FFR >0.80; Group 3: iFR >0.89, FFR ≤0.80; and Group 4: iFR ≤0.89, FFR ≤0.80). Concordant groups were Groups 1 and 4, and discordant groups were Groups 2 and 3. Positive and negative discordant groups were Groups 3 and 2, respectively. RESULTS The median (Q1, Q3) FFR and iFR were 0.84 (0.76, 0.88) and 0.85 (0.76, 0.91), respectively. Discordance was observed in 48 vessels (29.3 %). In the discordant group, negative discordance (Group 2: iFR ≤0.89 and FFR >0.80) was predominant (45 cases, 93.6 %). Multivariate analysis showed that the left anterior descending artery [odds ratio (OR), 3.88; 95 % confidence interval (CI): 1.54-9.79, p = 0.004] and peak velocity ≥5.0 m/s (OR, 3.21; 95%CI: 1.36-7.57, p = 0.008) were independently associated with negative discordance (FFR >0.8 and iFR ≤0.89). CONCLUSIONS In patients with severe AS, discordance between FFR and iFR was predominantly negative and observed in 29.3 % of vessels. The left anterior descending artery and peak velocity ≥5.0 m/s were independently associated with negative discordance.
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Affiliation(s)
- Futoshi Yamanaka
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan; Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.
| | - Koki Shishido
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Shohei Yokota
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Noriaki Moriyama
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Tomoki Ochiai
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Takashi Yamada
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Takahiro Hayashi
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Hirokazu Miyashita
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Hiroaki Yokoyama
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Kenshi Yamanaga
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Noriaki Tabata
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Masashi Yamaguchi
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Tamiharu Yamagishi
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Takashi Matsumoto
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Kazuki Tobita
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Shingo Mizuno
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Yutaka Tanaka
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Masato Murakami
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Saeko Takahashi
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Shigeru Saito
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Kenichi Tsujita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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11
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Tehrani DM, Seto AH. Is Coronary Physiology Assessment Valid in Special Circumstances?: Aortic Stenosis, Atrial Fibrillation, Left Ventricular Hypertrophy, and Other. Interv Cardiol Clin 2023; 12:21-29. [PMID: 36372459 DOI: 10.1016/j.iccl.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Fractional flow reserve (FFR) and nonhyperemic pressure ratios (NHPRs) provide an important clinical tool to evaluate the hemodynamic significance of coronary lesions. However, these indices have major limitations. As these indices are meant to be surrogates of coronary flow, clinical scenarios such as aortic stenosis (with increased end-systolic and end-diastolic pressures) or atrial fibrillation (with significant beat-to-beat cardiac output variability) can have significant effect on the accuracy and reliability of these hemodynamic indices. Here, we provide a comprehensive evaluation of the pitfalls, limitations, and strengths of FFR and NHPRs in common clinical scenarios paired with coronary artery disease.
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Affiliation(s)
- David M Tehrani
- Ronald Reagan UCLA Medical Center, 650 Charles East Young Drive South, CHS A2-237, Los Angeles, CA 90095-1679, USA.
| | - Arnold H Seto
- Long Beach Veterans Administration Medical Center, 5901 East 7th Street, 111C, Long Beach, CA 90822, USA. https://twitter.com/arnoldseto
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12
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Fezzi S, Huang J, Lunardi M, Ding D, Ribichini FL, Tu S, Wijns W. Coronary physiology in the catheterisation laboratory: an A to Z practical guide. ASIAINTERVENTION 2022; 8:86-109. [PMID: 36798834 PMCID: PMC9890586 DOI: 10.4244/aij-d-22-00022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 04/21/2022] [Indexed: 11/16/2022]
Abstract
Coronary revascularisation, either percutaneous or surgical, aims to improve coronary flow and relieve myocardial ischaemia. The decision-making process in patients with coronary artery disease (CAD) remains largely based on invasive coronary angiography (ICA), even though until recently ICA could not assess the functional significance of coronary artery stenoses. Invasive wire-based approaches for physiological evaluations were developed to properly assess the ischaemic relevance of epicardial CAD. Fractional flow reserve (FFR) and later, instantaneous wave-free ratio (iFR), were shown to improve clinical outcomes in several patient subsets when used for coronary revascularisation guidance or deferral and for procedural optimisation of percutaneous coronary intervention (PCI) results. Despite accumulating evidence and positive guideline recommendations, the adoption of invasive physiology has remained quite low, mainly due to technical and economic issues as well as to operator-resistance to change. Coronary image-based computational physiology has been recently developed, with promising results in terms of accuracy and a reduction in computational time, costs, radiation exposure and risks for the patient. Lastly, the integration of intracoronary imaging and physiology allows for individualised PCI treatment, aiming at complete relief of ischaemia through optimised morpho-functional immediate procedural results. Instead of a conventional state-of-the-art review, this A to Z dictionary attempts to provide a practical guide for the application of coronary physiology in the catheterisation laboratory, exploring several methods, their pitfalls, and useful tips and tricks.
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Affiliation(s)
- Simone Fezzi
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, National University of Ireland, University Road, Galway, Ireland,Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy
| | - Jiayue Huang
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, National University of Ireland, University Road, Galway, Ireland,Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Mattia Lunardi
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, National University of Ireland, University Road, Galway, Ireland,Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy
| | - Daixin Ding
- The Lambe Institute for Translational Medicine, The Smart Sensors Lab and Curam, National University of Ireland, University Road, Galway, Ireland,Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Flavio L. Ribichini
- Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy
| | - Shengxian Tu
- Biomedical Instrument Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China,Department of Cardiology, Fujian Medical University Union Hospital, Fujian, China
| | - William Wijns
- The Lambe Institute for Translational Research, Galway National University of Ireland Galway (NUIG), Costello Road, Shantalla, Galway, H91 V4AY, Ireland
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13
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Lim Y, Anthony Tan K, Kuntjoro I, KF Hon J, Yip J, Tay E. Coronary Artery Disease in Patients Undergoing Transvalvular Aortic Valve Implantation. Interv Cardiol 2022; 17:e13. [PMID: 36304067 PMCID: PMC9585643 DOI: 10.15420/icr.2021.25] [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] [Received: 08/28/2021] [Accepted: 05/02/2022] [Indexed: 01/09/2023] Open
Abstract
Coronary artery disease (CAD) is common in patients with severe aortic stenosis. With the advent of transcatheter aortic valve implantation (TAVI) as a therapeutic option, management of CAD in such patients has undergone a revolution. Younger patients are now candidates for treatment, and have a greater life-time probability of requiring post-TAVI coronary access. Considerations include pre-procedural assessment and revascularisation, procedural planning to avoid coronary obstruction as well as optimisation of post-procedural coronary access. The authors review the challenges of managing CAD in TAVI patients, shed light on the evidence base, and provide guidance on how to optimise management.
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Affiliation(s)
- Yinghao Lim
- Department of Cardiology, National University Heart Centre, Singapore
| | - Kent Anthony Tan
- Department of Cardiology, National University Heart Centre, Singapore
| | - Ivandito Kuntjoro
- Department of Cardiology, National University Heart Centre, Singapore
| | - Jimmy KF Hon
- Department of Cardiac, Thoracic, and Vascular Surgery, National University Heart Centre, Singapore
| | - James Yip
- Department of Cardiology, National University Heart Centre, Singapore
| | - Edgar Tay
- Department of Cardiology, National University Heart Centre, Singapore
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14
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Minten L, McCutcheon K, Bennett J, Dubois C. Coronary physiology to guide treatment of coronary artery disease in a patient with severe aortic valve stenosis: friend or foe? A case report. Eur Heart J Case Rep 2022; 6:ytac333. [PMID: 36004043 PMCID: PMC9395135 DOI: 10.1093/ehjcr/ytac333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/16/2022] [Accepted: 07/26/2022] [Indexed: 01/09/2023]
Abstract
Abstract
Background
Severe aortic valve stenosis (AS) is the most frequent valve pathology in the developed world requiring intervention. Due to common factors in pathogenesis, patients with AS frequently have concomitant coronary artery disease (CAD). Determining the relative contribution of each component to the disease state is not easy as there is much overlap in complaints. Moreover, severe AS interferes with the haemodynamic assessment of intermediate coronary lesions.
Case summary
In this case report we describe the presentation and management of an 84-year-old patient, with a severely degenerated aortic valve bioprosthesis and an intermediate coronary artery lesion, presenting with acute decompensated heart failure and chest pain. Initial invasive haemodynamic assessment of the coronary lesion provided challenging findings and a second catheterization and intervention was needed to free the patient from his chest pain.
Discussion
Optimal assessment and treatment of CAD before valve replacement are controversial. Aortic valve stenosis on itself can lead to subendocardial ischaemia with subsequent angina pectoris. Simultaneously, AS can significantly affect coronary haemodynamics, hereby interfering with intra-coronary haemodynamic assessment of co-existing coronary lesions. Currently used coronary physiological indices are not validated in the AS population and valve replacement has variable effects on the fractional flow reserve and commonly used resting indices, such as the resting full-cycle ratio. Further research on this topic is needed and an overview of currently running studies that will advance this field significantly is provided.
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Affiliation(s)
- Lennert Minten
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven , Herestraat 49, 3000 Leuven , Belgium
- Department of Cardiovascular Medicine, University Hospitals Leuven (UZ Leuven) , 3000 Leuven , Belgium
| | - Keir McCutcheon
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven , Herestraat 49, 3000 Leuven , Belgium
| | - Johan Bennett
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven , Herestraat 49, 3000 Leuven , Belgium
- Department of Cardiovascular Medicine, University Hospitals Leuven (UZ Leuven) , 3000 Leuven , Belgium
| | - Christophe Dubois
- Department of Cardiovascular Sciences, Katholieke Universiteit Leuven , Herestraat 49, 3000 Leuven , Belgium
- Department of Cardiovascular Medicine, University Hospitals Leuven (UZ Leuven) , 3000 Leuven , Belgium
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15
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Does aortic stenosis impact some non-hyperemic pressure ratios more than others? CARDIOVASCULAR REVASCULARIZATION MEDICINE 2022; 41:53-54. [DOI: 10.1016/j.carrev.2022.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 01/10/2023]
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16
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Feasibility and Comparison of Resting Full-Cycle Ratio and Computed Tomography Fractional Flow Reserve in Patients with Severe Aortic Valve Stenosis. J Cardiovasc Dev Dis 2022; 9:jcdd9040116. [PMID: 35448092 PMCID: PMC9030550 DOI: 10.3390/jcdd9040116] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/10/2022] [Accepted: 04/12/2022] [Indexed: 01/09/2023] Open
Abstract
Background: Computed tomography derived Fractional Flow Reserve (CT-FFR) has been shown to decrease the referral rate for invasive coronary angiography (ICA). The purpose of the study was to evaluate the diagnostic performance of CT-FFR compared to hyperemia-free index Resting Full-cycle Ratio (RFR) in patients with relevant aortic stenosis (AS) and intermediate coronary stenosis. Methods: 41 patients with 46 coronary lesions underwent ICA with quantitative coronary angiography (QCA), pressure wire assessment and routine pre-transcatheter aortic valve replacement (TAVR) computed tomography (CT). CT-FFR analysis was performed using prototype on-site software. Results: RFR showed a significant correlation with CT-FFR (Pearson’s correlation, r = 0.632, p < 0.001). On a per-lesion basis, diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of CT-FFR were 82.6% (95% CI 68.6−92.2), 69.6% (95% CI 47.1−86.8), 95.7% (95% CI 78.1−99.9), 94.1% (95% CI 69.8−99.1), and 75.9% (95% CI 62.7−85.4), respectively. The optimal cutoff value of the CT-FFR for RFR ≤ 0.89 prediction was 0.815. The area under the receiver curve showed a larger area under the curve for CT-FFR (0.87; 95% CI 0.75−0.98) compared with CTA stenosis of ≥50% (0.54, 95% CI 0.38−0.71), CTA ≥ 70% (0.72, 95% CI 0.57−0.87) and QCA ≥ 50% (0.67, 95% CI 0.52−0.83). Conclusions: CT-FFR assessed by routine pre-TAVR CT is safe and feasible and shows a significant correlation with RFR in patients with AS. CT-FFR is superior to QCA ≥ 50%, CT ≥ 50% and CT ≥ 70% in assessing the hemodynamic relevance of intermediate coronary lesions. Thus, CT-FFR has the potential to guide revascularization in patients with AS.
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