According to the Abrupt Vessel Closure - AHA Task Force Definition, as modified by Ellis et al., coronary<unk>  complexity is typed as A, B1, B2, and C.
PCI: classification of the lesion
PCI equipment: guiding catheter selection
TIMI Risk Score for Unstable Angina or NSTEMI
Clopidogrel dosing and role of genetics: ELEVATE-TIMI 56 trial
Atherosclerosis classification
Aortic stenosis classification
Chronic stable angina electron beam tomography
Canadian cardiovascular society classification of angina pectoris