Abstract
Our study showed that 5 years after aortocoronary bypass graft surgery, radial artery grafts had preserved flow-mediated dilatation, whereas saphenous vein (SV) grafts had not.1 In agreement with Brugaletta et al, we feel it would be ideal to know the preexisting vasomotor response of the study grafts in all patients. Unfortunately, not all the patients who were studied at 3 months agreed to participate at 5 years.1,2 Four patients participated in Doppler studies at both follow-ups (radial artery=2 and SV=2), and we believe that the numbers are …
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