Limited antegrade subintimal tracking (LAST)
Subintimal tracking is often resorted to cross chronic total occlusions (CTO). A relatively stiff wire is pushed gradually till it forms a knuckle (loop) subitimaly beyond the distal end of the lesion. After that re-entry is achieved using a wire with an acute distal bend.1 The long term results of the technique like and potential adverse outcome like restenosis and aneurysm formation are yet to be available.
- Michael TT et al. Subintimal dissection/reentry strategies in coronary chronic total occlusion interventions. Circ Cardiovasc Interv. 2012;5:729-38.