Stent longitudinal distortion during left main stenting prevention and treatment conclusion

On OCT, findings of Longitudinal stent deformation are:

• Cross-section: Stacked (overlap), Overhanging struts, Malapposition, unequal distribution of struts and disrupted stent circularity
• Longitudinal assessment: Shortening of stent length
• 3D-reconstruction is useful to judge stent distortion/ deformation
• In general, OCT is very accurate in stent length measurement (Accuracy -0.13%, precision 5.86%), so that it is reliable to evaluate longitudinal shortening of stent (>10%).
• Due to the engagement of catheter in LM, stent deformation in proximal LM may be overlooked on OCT.