Fig 3. Effect of risk factors previously associated with increased homograft viability on late pulmonary homograft gradients. These putative risk factors included donor age less than 30 years, ABO mismatch, beating heart donor status, warm ischemic time less than 2 hours, amphotericin usage, and length of cryopreservation less than 20 months. Mean Doppler gradients across the pulmonary homograft increased from 6 ± 4 mm Hg in homografts with none of these risk factors to 26 ± 3 mm Hg in homografts with all six of these risk factors (p = 0.002).
