Optical coherence tomography versus angiography guided magnesium bioresorbable scaffold implantation in NSTEMI patients

Christian Oliver Fallesen*, Lisbeth Antonsen, Akiko Maehara, Manijeh Noori, Mikkel Hougaard, Kirstine Nørregaard Hansen, Julia Ellert, Ole Ahlehoff, Karsten Tange Veien, Jens Flensted Lassen, Anders Bo Junker, Henrik Steen Hansen, Lisette Okkels Jensen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Background: The purpose of a bioresorbable scaffold (BRS) is to provide radial support during coronary healing. In this study, coronary artery healing after optical coherence tomography (OCT)- versus angiography-guided magnesium BRS (MBRS) implantation in patients with non-ST-segment-elevation myocardial infarction (NSTEMI) is compared. Methods: 75 patients were randomized 1:1 to OCT- or angiography-guided implantation of a MBRS with protocolled pre- and post-dilation. In the OCT-guided group, prespecified criteria indicating additional intervention were (1) scaffold under-expansion, (2) strut malapposition, (3) edge dissection, and (4) residual stenosis at distal or proximal reference segments. The primary endpoint was OCT-derived healing stage at 6 months. Results: At 6 months, there was no difference in average healing stage between OCT- and angiography-guided intervention (4.6 [interquartile range (IQR): 4.5–4.7] versus 4.5 [IQR: 4.3–4.7]; p = 0.54). The MBRSs were completely resolved in 77.0% [IQR: 68.5–85.5] versus 76.5% [IQR: 67.9–85.5]; (p = 0.97). Minimal lumen area (MLA) was reduced at 6 months in both the OCT- (32.3%; p < 0.01) and the angiography-guided group (21.3%; p < 0.01), however OCT-guided implantation was associated with a greater reduction of total lumen volume (−27.1 ± 32.5 mm3 versus −5.0 ± 32.9 mm3; p < 0.01) and MLA (−2.3 ± 1.6 mm2 vs. −1.4 ± 1.4 mm2; p = 0.02). Conclusions: In NSTEMI patients, OCT-guidance with protocolled pre- and post-dilation of MBRS implantation showed similar healing pattern at 6 months compared to angiography-guidance alone. Clinical trial registration: The Coronary Artery Healing Process after Optical Coherence Tomography Guided Percutaneous Coronary Intervention with Magmaris Bioresorbable Scaffold in Patients with Non-ST-Segment-Elevation Myocardial Infarction: (HONEST) trial is registered with ClinicalTrials.gov, NCT03016624.

Original languageEnglish
JournalCardiovascular Revascularization Medicine
Pages (from-to)101-110
Publication statusPublished - Jul 2022


  • Bioresorbable scaffolds
  • Optical coherence tomography
  • Percutaneous Coronary Intervention/adverse effects
  • Humans
  • Treatment Outcome
  • Prosthesis Design
  • Absorbable Implants
  • Tomography, Optical Coherence/methods
  • Coronary Vessels/diagnostic imaging
  • Magnesium
  • ST Elevation Myocardial Infarction
  • Coronary Angiography/methods
  • Non-ST Elevated Myocardial Infarction/diagnostic imaging


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