Doppler techniques appear valuable in detecting stenosis in grafts. Percutaneous transluminal angioplasty performed under color Doppler ultrasonography guidance is useful in maintaining and improving graft patency. Percutaneous transluminal angioplasty with color Doppler ultrasonography guidance allows patients to avoid surgical intervention, hospitalization, and adverse reaction to contrast media and exposure to ionizing radiation, with reduced cost and with better graft survival.
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