All stent strut malappositions are not created equal.

The current meta-analysis evaluates the relationship of late incomplete stent apposition (LISA) observed either by IVUS or OCT 6-18 months after PCI and long-term outcomes, particularly in regard to stent thrombosis (ST) and has demonstrated a small but significant increase in ST with LISA. The results of the current study do not apply to acute stent malapposition whose relevance to adverse outcomes is uncertain based on current evidence and a malapposition classification based on presence, length, and severity of malapposed struts. A classification of stent malapposition based on cause of malapposition is proposed as a method to determine prognostic importance of acute incomplete stent apposition.