Abstract
After percutaneous coronary intervention (PCI) of bifurcation (BIF) lesion, the most common site of in-stent restenosis (ISR) is the ostium of the side-branch (SB). Why? Our prior research showed that lesions in mid right coronary (RCA), left anterior descending (LAD), left circumflex (LCX) were caused by intimal injury from collision between antegrade and retrograde flow during transition from diastole and systole. What causes lesion at the ostium or proximal segment of a SB (diagonal (D) or obtuse marginal (OM) or posterior descending artery (PDA)?
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