
This study evaluated percutaneous coronary intervention (PCI) outcomes for ostial or stumpless chronic total occlusion (CTO). The antegrade-only approach had higher success rates than the retrograde (RA) approach, with lower J-CTO scores and more microchannels. RA group had more in-hospital major adverse cardiac events (MACE) and myocardial infarction (MI). A J-CTO score below 2 and microchannels at the proximal stump predicted successful antegrade-only approach PCI. The study suggests that the antegrade-only approach is preferable for less complex CTO lesions and reduces the risk of in-hospital MACE.
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