Instantaneous Wave-Free Ratio for the Assessment of Intermediate Left Main Coronary Artery Stenosis: Correlations With Fractional Flow Reserve/Intravascular Ultrasound and Prognostic Implications: The iLITRO-EPIC07 Study. (16th September 2022)

• Record Type: Journal Article
• Authors: Rodriguez-Leor, Oriol; de la Torre Hernández, José María; García-Camarero, Tamara; García del Blanco, Bruno; López-Palop, Ramón; Fernández-Nofrerías, Eduard; Cuellas Ramón, Carlos; Jiménez-Kockar, Marcelo; Jiménez-Mazuecos, Jesús; Fernández Salinas, Francisco; Gómez-Lara, Josep; Brugaletta, Salvatore; Alfonso, Fernando; Palma, Ricardo; Gómez-Menchero, Antonio E.; Millán, Raúl; Tejada Ponce, David; Linares Vicente, José Antonio; Ojeda, Soledad; Pinar, Eduardo; Fernández-Pelegrina, Estefanía; Morales-Ponce, Francisco J.; Cid-Álvarez, Ana Belén; Rama-Merchan, Juan Carlos; Molina Navarro, Eduardo; Escaned, Javier; Pérez de Prado, Armando
• Other Names: other.
• Is Part Of: Circulation. Volume 15:Number 11(2022)
• Page Start: 861
• Page End: 871
• Publication Date: 2022-09-16
• Subjects: coronary artery disease -- left main coronary artery disease -- ultrasound imaging; Cardiovascular system -- Surgery -- Periodicals; Cardiovascular system -- Diseases -- Treatment -- Periodicals; 616.105
• DOI: 10.1161/CIRCINTERVENTIONS.122.012328
• Languages: English
• ISSNs: 1941-7640

Abstract

Abstract : Background: There is little information available on agreement between fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) in left main coronary artery (LMCA) intermediate stenosis. Besides, several meta-analyses support the use of FFR to guide LMCA revascularization, but limited information is available on iFR in this setting. Our aims were to establish the concordance between FFR and iFR in intermediate LMCA lesions, to evaluate with intravascular ultrasound (IVUS) in cases of FFR/iFR discordance, and to prospectively validate the safety of deferring revascularization based on a hybrid decision-making strategy combining iFR and IVUS. Methods: Prospective, observational, multicenter registry with 300 consecutive patients with intermediate LMCA stenosis who underwent FFR and iFR and, in case of discordance, IVUS and minimal lumen area measurements. Primary clinical end point was a composite of cardiovascular death, LMCA lesion-related nonfatal myocardial infarction, or unplanned LMCA revascularization. Results: FFR and iFR had an agreement of 80% (both positive in 67 and both negative in 167 patients); in case of disagreement (31 FFR+/iFR– and 29 FFR−/iFR+) minimal lumen area was ≥6 mm 2 in 8.7% of patients with FFR+ and 14.6% with iFR+. Among the 300 patients, 105 (35%) underwent revascularization and 181 (60%) were deferred according to iFR and IVUS. At a median follow-up of 20 months, major adverse cardiac events incidence was 8.3% in the defer group and 13.3% in the revascularization group (hazard ratio, 0.71 [95% CI 0.30–1.72]; P =0.45). Conclusions: In patients with intermediate LMCA stenosis, a physiology-guided treatment decision is feasible either with FFR or iFR with moderate concordance between both indices. In case of disagreement, the use of IVUS may be useful to indicate revascularization. Deferral of revascularization based on iFR appears to be safe in terms of major adverse cardiac events. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03767621.