Background: Patients with high bleeding risk (HBR) are often treated with abbreviated dual antiplatelet therapy (DAPT) after percutaneous coronary intervention (PCI) to reduce bleeding risk, however this strategy is associated with an increase in ischemic events, especially if the acute PCI result is suboptimal. We compared clinical outcomes among patients with HBR treated with 1-month DAPT who underwent intravascular ultrasound (IVUS)- or optical coherence tomography (OCT)-guided PCI versus those who underwent angiography-guided PCI without intravascular imaging., Methods: The Onyx ONE Clear study includes patients with HBR from the Onyx ONE US/Japan and Onyx ONE randomized studies who were treated with the Resolute Onyx zotarolimus-eluting stent. The primary endpoint was the composite of cardiac death (CD) or myocardial infarction (MI) between 1 month and 2 years after PCI. Propensity-score adjustments and matching were performed for differences in baseline and procedural characteristics between groups., Results: Among the 1507 patients in Onyx ONE Clear, 271 (18.0 %) had IVUS or OCT used during PCI (Imaging-guided group) and 1236 (82.0 %) underwent Angiography-guided PCI (Angio-guided group). Imaging-guided patients were less likely to present with atrial fibrillation, acute coronary syndrome, and left ventricle ejection fraction ≤35 %. Conversely, Imaging-guided patients were more likely to have complex (ACC/AHA type B2/C), longer, and heavily calcified lesions. Between 1 month and 2 years, the composite rate of CD or MI was similar between Imaging-guided and Angio-guided patients (9.9 % vs. 12.4 %, P = 0.33). There was also no difference between groups after adjustment; (P = 0.56). However, CD was significantly lower among Imaging-guided patients (2.7 % vs. 6.1 %, P = 0.048). There were no between-group differences in MI or stent thrombosis. Propensity score matching results were similar., Conclusion: Despite higher lesion complexity, using intravascular imaging guidance for PCI between 1-month and 2-years follow-up had comparable outcomes with angiographic guidance alone in patients with HBR treated with 1-month DAPT. (ClinicalTrials.gov: Identifier: NCT03647475 and NCT03344653)., Non-Standard Abbreviations and Acronyms: BARC: Bleeding Academic Research Consortium; DAPT: dual antiplatelet therapy; DES: drug-eluting stent; HBR: high bleeding risk; IVUS: intravascular ultrasound; OCT: optical coherence tomography; SAPT: single antiplatelet therapy., Competing Interests: Declaration of competing interest G.G.T. reports consultancy fees and unrestricted research supports from Medtronic, Biotronik, Terumo and Abbott, outside of this project. D.E.K. reports institutional research/grant support from Biotronik, Boston Scientific, Cardiovascular Systems, Inc., Orbus Neich, Teleflex, Medtronic and Ablative Solutions; and personal consulting honoraria from Ablative Solutions, Cardiovascular Systems, Inc., Magenta Medical, Medtronic, and Terumo. A.J.K. reports institutional funding to Columbia University and/or Cardiovascular Research Foundation from Medtronic, Boston Scientific, Abbott Vascular, Abiomed, CSI, CathWorks, Siemens, Philips, ReCor Medical, Neurotronic. In addition to research grants, institutional funding includes fees paid to Columbia University and/or Cardiovascular Research Foundation for consulting and/or speaking engagements in which Dr. Kirtane controlled the content. Personal: Consulting from IMDS; Travel Expenses/Meals from Medtronic, Boston Scientific, Abbott Vascular, Abiomed, CSI, CathWorks, Siemens, Philips, ReCor Medical, Chiesi, OpSens, Zoll, and Regeneron. S.W. reports research and educational grants to the institution from Abbott, Abiomed, Amgen, Astra Zeneca, Bayer, Biotronik, Boehringer Ingelheim, Boston Scientific, Bristol Myers Squibb, Cardinal Health, CardioValve, Corflow Therapeutics, CSL Behring, Daiichi Sankyo, Edwards Lifesciences, Guerbet, InfraRedx, Janssen-Cilag, Johnson & Johnson, Medicure, Medtronic, Merck Sharp & Dohm, Miracor Medical, Novartis, Novo Nordisk, Organon, OrPha Suisse, Pfizer, Polares, Regeneron, Sanofi-Aventis, Servier, Sinomed, Terumo, Vifor, V-Wave. He serves as unpaid advisory board member and/or unpaid member of the steering/executive group of trials funded by Abbott, Abiomed, Amgen, Astra Zeneca, Bayer, Boston Scientific, Biotronik, Bristol Myers Squibb, Edwards Lifesciences, Janssen, MedAlliance, Medtronic, Novartis, Polares, Recardio, Sinomed, Terumo, V-Wave and Xeltis, but has not received personal payments by pharmaceutical companies or device manufacturers. He is also member of the steering/executive committee group of several investigator-initiated trials that receive funding by industry without impact on his personal remuneration. A. Latib reports consulting fees from Medtronic, Abbott Vascular, and Boston Scientific. E.K. has speaker honoraria from Medtronic, Abbott, Aortic Lab, and has received institutional grants from Abbott and Medtronic. R.M. reports institutional research payments from Abbott, Abiomed, Alleviant Medical, AM-Pharma, Applied Therapeutics, Arena, AstraZeneca, BAIM, Bayer, Beth Israel Deaconess, Biosensors, Biotronik, Boston Scientific, Bristol-Myers Squibb, CardiaWave, CellAegis, CeloNova, CERC, Chiesi, Concept Medical, CSL Behring, Cytosorbents, DSI, Duke University, Element Science, Faraday, Humacyte, Idorsia, Insel Gruppe AG, Magenta, Medtronic, Novartis, OrbusNeich, Philips, RenalPro, Vivasure, Zoll; personal fees from Cine-Med Research, WebMD; consulting fees paid to the institution from Abbott, Janssen, Medtronic, Novartis; Equity <1 % in Applied Therapeutics, Elixir Medical, STEL, CONTROLRAD (spouse); Scientific Advisory Board for AMA, ACC (BOT Member), SCAI (Women in Innovations Committee Member), JAMA Associate Editor; Faculty CRF (no fee). M.J.P. reports consulting and speaker's honoraria from Abbott Vascular, Baylis Medical, Boston Scientific, Medtronic, Shockwave Medical, and W.L. Gore and consulting honoraria from Biotronik, InnovHeart, and Philips. J.W.C. is an advisory board member for Medtronic and is on the speaker bureau for Shockwave Medical. R.C. has nothing to disclose. R.T. reports institutional grant/support from Medtronic, Biotronik, Micell Technologies, B/Braun, Sahajanand Medical Technologies, Abbot Vascular, Pfizer, Amgen, Regeneron, Novartis, Bayer, Medicins Company, Esperion, Daiichi Sankyo, CLS Behring, Boehringer Ingelheim, and Celecor Therapeutics. E.D. has nothing to disclose. S.S. has nothing to disclose. S.S.B. reports institutional research/grant support from Medtronic, Boston Scientific, and Edwards Lifesciences. A. Loussararian has nothing to disclose. S.C. is a consultant for CoreValve and Medtronic. M.T. has nothing to disclose. G.W.S. has received speaker honoraria from Medtronic, Pulnovo, Infraredx; has served as a consultant to Valfix, TherOx, Robocath, HeartFlow, Ablative Solutions, Vectorious, Miracor, Neovasc, Abiomed, Ancora, Elucid Bio, Occlutech, CorFlow, Apollo Therapeutics, Impulse Dynamics, Vascular Dynamics, Shockwave, V-Wave, Cardiomech, Gore, Amgen; and has equity/options from Ancora, Cagent, Applied Therapeutics, Biostar family of funds, SpectraWave, Orchestra Biomed, Aria, Cardiac Success, Valfix, Xenter. Dr. Stone's daughter is an employee at Medtronic. Institutional disclosure: Dr. Stone's employer, Mount Sinai Hospital, receives research support from Abbott, Bioventrix, Cardiovascular Systems Inc., Phillips, Biosense-Webster, Shockwave, Vascular Dynamics and V-wave. T.L. is an employee and shareholder of Medtronic. D.M. reports proctor and consultation fees from Medtronic, Boston Scientific, and Microport., (Copyright © 2023. Published by Elsevier Inc.)