The segmental pressures shown below indicate which level of…

The segmental pressures shown below indicate which level of disease?  Right mmHg Index Left mmHg Index Brachial 118 Brachial 122 Thigh 151 1.24 Thigh 95 0.78 Calf 100 0.82 Calf 92 0.75 Ankle (PTA) 99 0.81 Ankle (PTA) 96 0.79 Ankle (DPA) 97 0.80 Ankle (DPA) 95 0.78

A patient is sent to your laboratory to have his lower extre…

A patient is sent to your laboratory to have his lower extremity bypass graft evaluated with duplex.  While performing the examination you notice that the velocity at the proximal anastomosis is 80 cm/s.  You continue the examination and obtain a pulse wave Doppler signal about 1cm distal to the proximal anastomosis and you get a velocity of 210 cm/s.  What do these findings suggest?