the point was to contemplate the ordinary elements of the coronary corridors during life by utilizing quantitative coronary angiography concerning varieties and conceivably to help interventional cardiologist and heart specialist . The chose people (256) of both genders, 128 guys and 128 females, were separated into 4 subgroups as indicated by age ,Group A,(30Y:< 40Y), Group B,(40Y:< 50Y), Group C(50Y:< 60Y),Group D, their ages were over 60 years. The people enrolled for coronary angiography in catheterization lab unit in Benha University Hospital were taken a crack at this examination. Angiograms showing impediments were rejected from this investigation. The boundaries of the coronary corridors were bigger in guys than females with huge p-esteem for length of LMCA and distance across of RCA in regards to breadth of LMCA additionally was bigger among guys yet genuinely was nonsignificant. Trifurcation of LMCA discovered to be altogether more regular in guys than females .The mean measurement of the coronary supply routes commonly expanded with increment in age with critical p-esteem for width of LMCA in regards to the breadth of RCA additionally expanded with increment in age however measurably was nonsignificant. The boundaries of the coronary veins were bigger in guys than females. Trifurcation of LMCA discovered to be fundamentally more successive in guys than females. The mean distance across of the coronary conduits for the most part expanded with increment in age.