Proximal stenting to LAD and LCX coronary arteries does induce accelerated ostial sclerotic changes; even in a period of some months post-PCI; thereby jeopardizing LAD and LCX ostia, that can involve the distal LM.

I think a safe distance from the LAD and LCX ostia at least about 1.5 to 2 cm should be observed when considering proximal LAD and LCX stenting.