The Official Journal of EuroPCR and the European Association of Percutaneous Coronary Interventions (EAPCI)

Letter to the editor

Letter: When is the optimal time point for detecting malapposition in coronary bifurcation trials?

EuroIntervention 2021;17:607-608. DOI: 10.4244/EIJ-D-21-00445L

1. Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark; 2. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
We read with interest the paper by Watanabe et al investigating stent apposition in bifurcation lesions when the proximal optimisation technique (POT) was performed followed by side branch dilatation (SBD) versus the conventional kissing balloon inflation technique (KBT)1. We were pleased to read the paper and enjoyed the very well conducted quantitative optical coherence tomography (OCT) analysis. However, we have some concerns regarding the methodological approach and fear a false acceptance of the null hypothesis.

First, in the flow chart presented in Figure 1, we were pleased to see that OCT was performed immediately after initial treatment (POT+SBD or ...

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