Performing percutaneous coronary interventions with predilatation using non-compliant balloons at high-pressure versus conventional semi-compliant balloons: insights from two randomised studies using optical coherence tomography

Florim Cuculi, Matthias Bossard, Wojciech Zasada, Federico Moccetti, Michiel Voskuil, Mathias Wolfrum, Krzysztof Piotr Malinowski, Stefan Toggweiler, Richard Kobza, Florim Cuculi, Matthias Bossard, Wojciech Zasada, Federico Moccetti, Michiel Voskuil, Mathias Wolfrum, Krzysztof Piotr Malinowski, Stefan Toggweiler, Richard Kobza

Abstract

Introduction: Stent underexpansion is a predictor of in-stent-restenosis and stent thrombosis. Semi-compliant balloons (SCBs) are generally used for lesion preparation. It remains unknown whether routine predilatation using non-compliant balloons (NCBs) improves stent expansion in ordinary coronary lesions.

Methods: The PREdilatation by high-pressure NC balloon catheter for better vessel preparation and Optimal lesion preparation with non-compliant balloons for the implantation of bioresorbable vascular scaffolds studies randomised patients presenting with stable coronary artery disease or non-ST-elevation myocardial infarction requiring stent implantation to lesion preparation using NCBs versus SCBs. Stent expansion index (SEI-minimal luminal area/mean luminal area on optical coherence tomography) and periprocedural complications were compared.

Results: We enrolled 104 patients: 53 patients (54 lesions) vs 51 patients (56 lesions) to the NCB and SCB groups, respectively. Predilatation pressure was higher in the NCB group (24±7 atmospheres (atm) vs 14±3 atm, p<0.0001). Postdilatation using NCBs was performed in 41 (76%) lesions vs 46 (82%) lesions pretreated with NCBs versus SCBs (p=0.57). Similar pressures were used for postdilatation with NCB in both groups (23±8 atm vs 23±9 atm, p=0.65). SEI after stent implantation was 0.88±0.13 in the NCB vs 0.85±0.14 in the SCB group (p=0.18). After postdilatation, SEI increased to 0.94±0.13 in the NCB group vs 0.88±0.13 in the SCB group (p=0.02). No relevant complications occurred.

Conclusions: In simple coronary lesions, predilatation/postdilatation with NCBs at high pressures appears to result in better scaffold and stent expansion. Using SCBs only for predilatation might lead to inadequate stent expansion and postdilatation with NCBs might only partially correct this. Predilatation and postdilatation using NCBs at high pressure is safe.

Trial registration number: ClinicalTrials.gov no. NCT03518645.

Keywords: Angioplasty; Lesion preparation; Optical coherence tomography; Percutaneous coronary intervention; Scaffold; Stent.

Conflict of interest statement

Competing interests: FC has received speaker fees and research grants from Abbott Vascular and SIS Medical. RK has received institutional grant support from Abbott, Biotronik, Biosense Webster, Boston Scientific, Medtronic and SIS Medical. None of the other authors had any relevant conflicts of interest.

© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

Figures

Figure 1
Figure 1
Study flow chart of the Pre-NC and OPRENBIS trials. NC, non-compliant; SCB, semi-compliant balloon.
Figure 2
Figure 2
Stent expansion index (SEI) assessed by optical coherence tomography (A) after device implantation and postdilatation in the semi-compliant balloon (SCB) group vs non-compliant balloon (NCB) group, (B) SEI after predilatation and postdilatation in the NCB group and (C) SEI after predilatation and postdilatation in the SCB group.

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