Background

Although the success rate of chronic total occlusion (CTO) PCI has recently increased, vessel diameter distal to the successfully recanalized CTO lesion is often smaller than expected immediately after recanalization. Therefore, we examined if the distal segment vessel diameter would increase at one year follow-up.

Methods

Consecutive patients ( n = 48) who received successful PCI of CTO lesion were prospectively included. One year follow-up catheterization was performed in all patients. Vessel diameter distal to the recanalized CTO lesion (at 10 mm from distal stent edge) was compared between follow-up and immediately after recanalization (baseline) by QCA.

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