T- vs Y- shaped coronary bifurcations

T- vs Y- shaped coronary bifurcations

Coronary bifurcation with an angle of less than seventy degrees are known as Y-shaped coronary bifurcation. Access to side branch is easier in Y-shaped bifurcations, though plaque shift while balloon dilating the main branch is much more likely in these lesions.When the angulation is more than seventy degrees, it is called a T-shaped coronary bifurcation. Access to side branch is more difficult in T-shaped lesions, but plaque shift is minimal. The angulation between the branches is further modified when both branches are wired, due to the stiffness of the wires as compared to the vessels.