Figure 3

Risk factors for higher transvalvular gradients after stentless valve implantation. By solving the multivariate equations we had illuminated the importance of the dominant risk factors for higher gradients after stentless valve implantation: valve size in relation to BSA (IGOE), subcoronary technique, preoperative gradients, and the surgeons C, D, E. Other risk factors (cardiac, haematological) were less important (se table 4). With total root technique virtually no increase of the risk for higher gradients with decreasing IGOA was observed, whereas with subcoronary technique the risk increases exponentially.