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Faurie B, Acheampong A, Abdellaoui M, Dessus I, Monsegu J, Wintzer-Wehekind J. Direct wire pacing during measurement of fractional flow reserve: A randomized proof-of-concept noninferiority crossover trial. Front Cardiovasc Med 2023; 10:1137309. [PMID: 37937287 PMCID: PMC10625906 DOI: 10.3389/fcvm.2023.1137309] [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: 01/04/2023] [Accepted: 03/30/2023] [Indexed: 11/09/2023] Open
Abstract
Background Adenosine administration for fractional flow reserve (FFR) measurement may induce heart pauses. Aims To assess the accuracy and tolerability of direct wire pacing (DWP) during measurement of FFR. Methods Adults with at least one intermediate coronary artery stenosis (40%-80%) were consecutively enrolled between June 2021 and February 2022 in this randomized, noninferiority, crossover trial (NCT04970082) carried out in France. DWP was applied (DWP) or not (standard method) through the pressure guidewire used for FFR measurement during adenosine-induced maximal hyperaemia. Subjects were randomly assigned to the allocation sequence (DWP first or standard first). A 2-minute washout period was observed between the two FFR measurements performed for each stenosis. The primary endpoint was the reproducibility of FFR measurements between methods. Results A total of 150 focal lesions, presented by 94 subjects, were randomized (ratio: 1:1). The FFR values obtained with each method were nearly identical (R = 0.98, p = 0.005). The mean FFR difference of 0.00054 (95% confidence interval: 0.004 to 0.003) showed the noninferiority of FFR measurement with DWP vs. that with the standard method. Higher levels of chest discomfort were reported with DWP than with the standard method (0.61 ± 0.84 vs. 1.05 ± 0.89, p < 0.001), and a correlation was observed between the electrical sensations reported with DWP and chest discomfort (p < 0.001). Pauses (n = 20/148 lesions) were observed with the standard method, but did not correlate with chest discomfort (p = 0.21). No pauses were observed with DWP. Conclusions DWP during FFR measurement resulted in accurate and reproducible FFR values, and eliminated the pauses induced by adenosine.
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Affiliation(s)
| | - Angela Acheampong
- Institut Cardiovasculaire de Grenoble, Grenoble, France
- Université Libre de Bruxelles, Bruxelles, Belgium
| | | | - Ilona Dessus
- Institut Cardiovasculaire de Grenoble, Grenoble, France
- Université Grenoble-Alpes, CHU Grenoble-Alpes, Grenoble, France
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Prognostic value of post-percutaneous coronary intervention diastolic pressure ratio. Neth Heart J 2022; 30:352-359. [PMID: 35391616 PMCID: PMC9270544 DOI: 10.1007/s12471-022-01680-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2022] [Indexed: 11/20/2022] Open
Abstract
Aim To evaluate the distribution of a generic diastolic pressure ratio (dPR) after angiographically successful percutaneous coronary intervention (PCI) and to assess its association with the 2‑year incidence of target vessel failure (TVF), defined as a composite of cardiac mortality, target vessel revascularisation, target vessel myocardial infarction and stent thrombosis. Methods The dPR SEARCH study is a post hoc analysis of the prospective single-centre FFR-SEARCH registry, in which physiological assessment was performed after angiographically successful PCI in a total of 1000 patients, using a dedicated microcatheter. dPR was calculated offline with recently validated software in a subset of 735 patients. Results Mean post-PCI dPR was 0.95 ± 0.06. Post-PCI dPR was ≤ 0.89 in 15.2% of the patients. The cumulative incidence of TVF at 2‑year follow-up was 9.4% in patients with a final post-PCI dPR ≤ 0.89 as compared to 6.1% in patients with a post-PCI dPR > 0.89 (adjusted hazard ratio [HR] for dPR ≤ 0.89: 1.53; 95% CI 0.74–3.13; p = 0.249). dPR ≤ 0.89 was associated with significantly higher cardiac mortality at 2 years; adjusted HR 2.40; 95% CI 1.01–5.68; p = 0.047. Conclusions In a real-world setting, despite optimal angiographic PCI results, 15.2% of the patients had a final post-PCI dPR of ≤ 0.89, which was associated with a higher incidence of TVF and a significantly higher cardiac mortality rate. Supplementary Information The online version of this article (10.1007/s12471-022-01680-0) contains supplementary material, which is available to authorized users.
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Li C, Yang J, Dong S, Dong L, Chen J, Shen L, Zhang F, Li C, Liu H, Hu X, Hau WK, Qian J, Jeremias A, Wang J, Ge J. Multicenter clinical evaluation of a piezoresistive-MEMS-sensor rapid-exchange pressure microcatheter system for fractional flow reserve measurement. Catheter Cardiovasc Interv 2021; 98:E243-E253. [PMID: 33951285 PMCID: PMC8453920 DOI: 10.1002/ccd.29678] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/02/2021] [Accepted: 03/16/2021] [Indexed: 11/11/2022]
Abstract
Objectives This multicenter, prospective clinical study investigates whether the microelectromechanical‐systems‐(MEMS)‐sensor pressure microcatheter (MEMS‐PMC) is comparable to a conventional pressure wire in fractional flow reserve (FFR) measurement. Background As a conventional tool for FFR measurement, pressure wires (PWs) still have some limitations such as suboptimal handling characteristics and unable to maintain the wire position during pullback assessment. Recently, a MEMS‐PMC compatible with any 0.014″ guidewire is developed. Compared with the existing optical‐sensor PMC, this MEMS‐PMC has smaller profiles at both the lesion crossing and sensor packaging areas. Methods Two hundred and forty‐two patients with visually 30–70% coronary stenosis were enrolled at four centers. FFR was measured first with the MEMS‐PMC, and then with the PW. The primary endpoint was the Bland–Altman mean bias between the MEMS‐PMC and PW FFR. Results From the 224‐patient per‐protocol data, quantitative coronary angiography showed 17.9% and 55.9% vessels had diameter < 2.5 mm and stenosis >50%, respectively. The two systems' mean bias was −0.01 with [−0.08, 0.06] 95% limits‐of‐agreement. Using PW FFR≤0.80 as cutoff, the MEMS‐PMC per‐vessel diagnostic accuracy was 93.4% [95% confidence interval: 89.4–96.3%]. The MEMS‐PMC's success rate was similar to that of PW (97.5 vs. 96.3%, p = .43) with no serious adverse event, and its clinically‐significant (>0.03) drift rate was 43% less (9.5 vs. 16.7%, p = .014). Conclusions Our study showed the MEMS‐PMC is safe to use and has a minimal bias equal to the resolution of current FFR systems. Given the MEMS‐PMC's high measurement accuracy and rapid‐exchange nature, it may become an attractive new tool facilitating routine coronary physiology assessment.
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Affiliation(s)
- Chenguang Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Junqing Yang
- Department of Cardiology, Guangdong Provincial People's Hospital, Guangzhou, Guangdong, China
| | - Shaohong Dong
- Department of Cardiology, Shenzhen People's Hospital, Shenzhen, Guangdong, China
| | - Liang Dong
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou, China
| | - Jiyan Chen
- Department of Cardiology, Guangdong Provincial People's Hospital, Guangzhou, Guangdong, China
| | - Li Shen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Feng Zhang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Changling Li
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou, China
| | - Huadong Liu
- Department of Cardiology, Shenzhen People's Hospital, Shenzhen, Guangdong, China
| | - Xinyang Hu
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou, China
| | - William Kongto Hau
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Juying Qian
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Allen Jeremias
- Department of Cardiology, St. Francis Hospital, Roslyn, New York, New York, USA.,Clinical Trials Center, Cardiovascular Research Foundation, New York, New York, USA
| | - Jian'an Wang
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou, China
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
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Matsuo Y, Shiono Y, Kashiyama K, Ino Y, Nishi T, Terada K, Emori H, Higashioka D, Katayama Y, Mahfouz AK, Wada T, Fujita S, Takahata M, Shimamura K, Kashiwagi M, Kuroi A, Tanaka A, Hozumi T, Kubo T, Akasaka T. Extent of the difference between microcatheter and pressure wire-derived fractional flow reserve and its relation to optical coherence tomography-derived parameters. IJC HEART & VASCULATURE 2020; 27:100500. [PMID: 32195316 PMCID: PMC7075984 DOI: 10.1016/j.ijcha.2020.100500] [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: 01/04/2020] [Revised: 03/01/2020] [Accepted: 03/03/2020] [Indexed: 12/01/2022]
Abstract
Background Although previous studies demonstrated that microcatheter-derived fractional flow reserve (mc-FFR) tends to overestimate lesion severity compared to pressure wire-derived FFR (pw-FFR), the clinical utility of mc-FFR remains obscure. The extent of differences between the two FFR systems and its relation to a lesion-specific parameter remain unknown. In this study, we sought to compare mc-FFR with pw-FFR and determine the lower and upper mc-FFR cut-offs predicting ischemic and non-ischemic stenosis, using an ischemic and a clinical FFR threshold of 0.75 and 0.80 as references, respectively. We further explored optical coherence tomography (OCT) parameters influencing the difference in FFR between the two systems. Methods and results In this study, 44 target vessels with intermediate de novo coronary artery lesion in 36 patients with stable ischemic heart disease were evaluated with mc-FFR, pw-FFR and OCT. Bland-Altman plots for mc-FFR versus pw-FFR showed a bias of −0.04 for lower mc-FFR values compared to pw-FFR values. The mc-FFR cut-off values of 0.73 and 0.79 corresponded to the 0.75 ischemic pw-FFR and 0.80 clinical pw-FFR thresholds with high predictive values, respectively. The differences in the two FFR measurements (pw-FFR minus mc-FFR) were negatively correlated with OCT-derived minimum lumen area (MLA) (R = −0.359, p = 0.011). The OCT-derived MLA of 1.36 mm2 was a cut-off value for predicting the clinically significant difference between the two FFR measurements defined as >0.03. Conclusion Mc-FFR is clinically useful when the specific cut-offs are applied. An OCT-derived MLA accounts for the clinically significant difference in FFR between the two systems.
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Affiliation(s)
- Yoshiki Matsuo
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Yasutsugu Shiono
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Kuninobu Kashiyama
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasushi Ino
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Takahiro Nishi
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Kosei Terada
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Hiroki Emori
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Daisuke Higashioka
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Yosuke Katayama
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Amir Khalifa Mahfouz
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Teruaki Wada
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Suwako Fujita
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Masahiro Takahata
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Kunihiro Shimamura
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Manabu Kashiwagi
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Akio Kuroi
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Atsushi Tanaka
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Takeshi Hozumi
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Takashi Kubo
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
| | - Takashi Akasaka
- The Department of Cardiovascular Medicine, Wakayama Medical University, Wakayama, Japan
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Diagnostic Accuracy of Microcatheter Derived Fractional Flow Reserve. Am J Cardiol 2019; 124:183-189. [PMID: 31104777 DOI: 10.1016/j.amjcard.2019.04.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 01/10/2023]
Abstract
Microcatheter derived fractional flow reserve (FFRMC) system has an increased profile compared with pressure-wire derived fractional flow reserve (FFRW). Consequently, the FFRMC system itself may increase the degree of coronary artery stenosis and lower the measured FFR value. This can affect the diagnostic accuracy of the FFRMC system and inadvertently result in erroneous therapy for patients. Our aim was to evaluate the diagnostic accuracy FFRMC measurements and provide a means for clinicians to interpret individual FFRMC results with respect to FFRW. Correlation between FFR measurement techniques was analyzed in this lesion level analysis of 413 patients and 441 lesions from 6 studies. The reference standard to determine physiological significant stenosis was FFRW value ≤0.80. The mean values for FFRMC and FFRW were 0.80 ± 0.11 and 0.83 ± 0.09, respectively. Bland-Altman analysis demonstrated a bias toward overestimation of FFR by FFRMC (bias, -0.03 [0.05]). The overall lesion level diagnostic accuracy of the FFRMC system was 80.4% (95% confidence interval [CI] 76.2% to 84.0%). The diagnostic accuracy for FFRMC values <0.75, 0.75 to 0.85 and >0.85 were 83.7% (95% CI 71.4% to 92.4%), 72.3% (95% CI 59.8% to 75.6%), and 99.2% (95% CI 94.8% to 99.8%), respectively. Using the FFRW threshold of ≤0.80, 16.3% of lesions would have had inappropriate revascularization according to FFRMC measurements. Receiver-operating characteristics suggested the optimal cut-off value of FFRMC to determine ischemia was 0.78. In conclusion, the diagnostic accuracy of FFRMC varies markedly across the spectrum of disease with marked deterioration for values between 0.75 and 0.85. This may result in clinicians to inadvertently revascularize patients with FFR measurements >0.80.
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Seligman H, Shun-Shin MJ, Vasireddy A, Cook C, Ahmad YY, Howard J, Sen S, Al-Lamee R, Nijjer S, Chamie D, Davies J, Mayet J, Francis DP, Petraco R. Fractional flow reserve derived from microcatheters versus standard pressure wires: a stenosis-level meta-analysis. Open Heart 2019; 6:e000971. [PMID: 30997135 PMCID: PMC6443142 DOI: 10.1136/openhrt-2018-000971] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 12/18/2018] [Accepted: 01/20/2019] [Indexed: 01/05/2023] Open
Abstract
Aims To determine the agreement between sensor-tipped microcatheter (MC) and pressure wire (PW)-derived fractional flow reserve (FFR). Methods and results Studies comparing FFR obtained from MC (FFRMC, Navvus Microcatheter System, ACIST Medical Systems, Eden Prairie, Minnesota, USA) versus standard PW (FFRPW) were identified, and a meta-analysis of numerical and categorical agreement was performed. The relative levels of drift and device failure of MC and PW systems from each study were assessed. Six studies with 440 lesions (413 patients) were included. The mean overall bias between FFRMC and FFRPW was -0.029 (FFRMC lower). Bias and variance were greater for lesions with lower FFRPW (p<0.001). Using a cut-off of 0.80, 18 % of lesions were reclassified by FFRMC versus FFRPW (with 15 % being false positives). The difference in reported drift between FFRPW and FFRMC was small. Device failure was more common with MC than PW (7.1% vs 2%). Conclusion FFRMC systematically overestimates lesion severity, with increased bias in more severe lesions. Using FFRMC changes revascularisation guidance in approximately one out of every five cases. PW drift was similar between systems. Device failure was higher with MC.
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Affiliation(s)
- Henry Seligman
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Matthew J Shun-Shin
- International Centre for Circulatory Health, Imperial College London, London, UK
| | | | - Christopher Cook
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Yousif Y Ahmad
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - James Howard
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Sayan Sen
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Rasha Al-Lamee
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Sukhjinder Nijjer
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Daniel Chamie
- Cardiology, Instituto Dante Pazzanese de Cardiologia, Sao Paulo, Brazil
| | - Justin Davies
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Jamil Mayet
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Darrel P Francis
- International Centre for Circulatory Health, Imperial College London, London, UK
| | - Ricardo Petraco
- International Centre for Circulatory Health, Imperial College London, London, UK
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Pouillot C, Adjedj J. Reply to the letter to the editor regarding the article “Pressure wire versus microcatheter for FFR measurement: a head-to-head comparison”. EUROINTERVENTION 2019; 14:1705-1706. [DOI: 10.4244/eij-d-18-00338r] [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: 11/23/2022]
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