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Prediction of optimal debulking segments before rotational atherectomy based on pre-procedural intravascular ultrasound findings

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Abstract

This study evaluated whether intravascular ultrasound (IVUS) examination before rotational atherectomy (RA) can predict the optimal route of passage of the RA burr along the vessel. 30 patients with calcified lesions who underwent IVUS before and immediately after RA were enrolled. IVUS analyses were performed at the minimum lumen area (MLA) site and at 0.5 mm intervals. Each IVUS cross-section was divided into 4 quadrants around the center of the lumen, and pre- and post-RA IVUS cross-section images were merged. Of 1140 cross-sections, 498 (44%) contained debulked regions. When the guidewire and IVUS were located within the same quadrant, the debulked region were distributed within the same quadrant in 96% of cross-sections. The debulked region and the guidewire were distributed within the same quadrant in 81% and the debulked region and the IVUS in 72% of cross-sections, in case the guidewire and IVUS were located in different quadrants. When the guidewire and the IVUS was apart > 1.0 mm, the debulked regions were distributed within the same quadrant as the guidewire in 100% and the IVUS in 0% of cross-sections. The position of the guidewire rather than that of the IVUS catheter on pre-RA IVUS images could predict the course of the RA burr’s passage, especially when the guidewire and IVUS catheter were located apart from each other.

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Acknowledgements

The authors thank the staffs in the catheterization laboratory at Kansai Medical University for their excellent assistance during the study.

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by KH, KF, HS, KM, ST, MO, SM, IS. The first draft of the manuscript was written by KH and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Kenichi Fujii.

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Hashimoto, K., Fujii, K., Shibutani, H. et al. Prediction of optimal debulking segments before rotational atherectomy based on pre-procedural intravascular ultrasound findings. Int J Cardiovasc Imaging 37, 803–812 (2021). https://doi.org/10.1007/s10554-020-02080-4

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