Georg M Fröhlich1, Simon Redwood2, Roby Rakhit3, Philip A MacCarthy4, Pitt Lim5, Tom Crake1, Steven K White1, Charles J Knight6, Christoph Kustosz7, Guido Knapp7, Miles C Dalby8, Iqbal S Mali9, Andrew Archbold6, Andrew Wragg6, Adam D Timmis6, Pascal Meier1. 1. Department of Cardiology, The Heart Hospital, University College London Hospital, London, England. 2. Department of Cardiology, Guy's and St Thomas' Hospital, London, England. 3. Department of Cardiology, Royal Free Hampstead National Health Service Trust, London, England. 4. Department of Cardiology, King's College Hospital, London, England. 5. Department of Cardiology, St George's Hospital, London, England. 6. Department of Cardiology, Barts Health National Health Service Trust, London, England. 7. Department of Statistics, Technische Universität Dortmund, Dortmund, Germany. 8. Department of Cardiology, Harefield Hospital, London, England. 9. Department of Cardiology, Imperial College Healthcare National Health Service Trust, London, England.
Abstract
IMPORTANCE: Intracoronary pressure wire-derived measurements of fractional flow reserve (FFR) and intravascular ultrasonography (IVUS) provide functional and anatomical information that can be used to guide coronary stent implantation. Although these devices are widely used and recommended by guidelines, limited data exist about their effect on clinical end points. OBJECTIVE: To determine the effect on long-term survival of using FFR and IVUS during percutaneous coronary intervention (PCI). DESIGN AND SETTING: Cohort study based on the pan-London (United Kingdom) PCI registry. In total, 64,232 patients are included in this registry covering the London, England, area. PARTICIPANTS: All patients (n = 41,688) who underwent elective or urgent PCI in National Health Service hospitals in London between January 1, 2004, and July 31, 2011, were included. Patients with ST-segment elevation myocardial infarction (n = 11,370) were excluded. INTERVENTIONS: Patients underwent PCI guided by angiography (visual lesion assessment) alone, PCI guided by FFR, or IVUS-guided PCI. MAIN OUTCOMES AND MEASURES: The primary end point was all-cause mortality at a median of 3.3 years. RESULTS: Fractional flow reserve was used in 2767 patients (6.6%) and IVUS was used in 1831 patients (4.4%). No difference in mortality was observed between patients who underwent angiography-guided PCI compared with patients who underwent FFR-guided PCI (hazard ratio, 0.88; 95% CI, 0.67-1.16; P = .37). Patients who underwent IVUS had a slightly higher adjusted mortality (hazard ratio, 1.39; 95% CI, 1.09-1.78; P = .009) compared with patients who underwent angiography-guided PCI. However, this difference was no longer statistically significant in a propensity score-based analysis (hazard ratio, 1.33; 95% CI, 0.85-2.09; P = .25). The mean (SD) number of implanted stents was lower in the FFR group (1.1 [1.2] stents) compared with the IVUS group (1.6 [1.3]) and the angiography-guided group (1.7 [1.1]) (P < .001). CONCLUSIONS AND RELEVANCE: In this large observational study, FFR-guided PCI and IVUS-guided PCI were not associated with improved long-term survival compared with standard angiography-guided PCI. The use of FFR was associated with the implantation of fewer stents.
IMPORTANCE: Intracoronary pressure wire-derived measurements of fractional flow reserve (FFR) and intravascular ultrasonography (IVUS) provide functional and anatomical information that can be used to guide coronary stent implantation. Although these devices are widely used and recommended by guidelines, limited data exist about their effect on clinical end points. OBJECTIVE: To determine the effect on long-term survival of using FFR and IVUS during percutaneous coronary intervention (PCI). DESIGN AND SETTING: Cohort study based on the pan-London (United Kingdom) PCI registry. In total, 64,232 patients are included in this registry covering the London, England, area. PARTICIPANTS: All patients (n = 41,688) who underwent elective or urgent PCI in National Health Service hospitals in London between January 1, 2004, and July 31, 2011, were included. Patients with ST-segment elevation myocardial infarction (n = 11,370) were excluded. INTERVENTIONS: Patients underwent PCI guided by angiography (visual lesion assessment) alone, PCI guided by FFR, or IVUS-guided PCI. MAIN OUTCOMES AND MEASURES: The primary end point was all-cause mortality at a median of 3.3 years. RESULTS: Fractional flow reserve was used in 2767 patients (6.6%) and IVUS was used in 1831 patients (4.4%). No difference in mortality was observed between patients who underwent angiography-guided PCI compared with patients who underwent FFR-guided PCI (hazard ratio, 0.88; 95% CI, 0.67-1.16; P = .37). Patients who underwent IVUS had a slightly higher adjusted mortality (hazard ratio, 1.39; 95% CI, 1.09-1.78; P = .009) compared with patients who underwent angiography-guided PCI. However, this difference was no longer statistically significant in a propensity score-based analysis (hazard ratio, 1.33; 95% CI, 0.85-2.09; P = .25). The mean (SD) number of implanted stents was lower in the FFR group (1.1 [1.2] stents) compared with the IVUS group (1.6 [1.3]) and the angiography-guided group (1.7 [1.1]) (P < .001). CONCLUSIONS AND RELEVANCE: In this large observational study, FFR-guided PCI and IVUS-guided PCI were not associated with improved long-term survival compared with standard angiography-guided PCI. The use of FFR was associated with the implantation of fewer stents.
Authors: Steven P Sedlis; Pamela M Hartigan; Koon K Teo; David J Maron; John A Spertus; G B John Mancini; William Kostuk; Bernard R Chaitman; Daniel Berman; Jeffrey D Lorin; Marcin Dada; William S Weintraub; William E Boden Journal: N Engl J Med Date: 2015-11-12 Impact factor: 91.245
Authors: Colin Berry; David Corcoran; Barry Hennigan; Stuart Watkins; Jamie Layland; Keith G Oldroyd Journal: Eur Heart J Date: 2015-06-02 Impact factor: 29.983