4.1. Study Limitations
This study was a single-center study with a small sample size, which reduces the generalizability of the results. The next step is to perform a multi-center randomized controlled study to provide more evidence of the feasibility of this technique. Intracoronary imaging (intravascular ultrasound or optical coherence tomography) was not performed in most patients due to the high cost, and therefore, data related to the lumen area could not be obtained. However, the benefits of the “