Predicting patient-prosthesis mismatch by aortic root evaluation before aortic valve replacement.

OBJECTIVE

This study aimed to assess the predictors of patient-prosthesis mismatch (PPM) after surgical aortic valve replacement (SAVR) or transcatheter aortic valve replacement (TAVR) using preoperative computed tomography.

METHODS

We enrolled 323 patients undergoing SAVR (n = 85) or TAVR (n = 238) for aortic stenosis. The end point was any degree of PPM (effective orifice area index <0.85 cm/m). We assessed the predictors of PPM after SAVR or TAVR and compared the incidence of PPM between both arms. Furthermore, we compared the hemodynamic performance using the propensity score matching.

RESULTS

The occurrence of PPM was significantly higher in the SAVR arm (24.7% vs 7.1%; P < .001). A small sinotubular junction was an independent predictor of PPM in the SAVR arm (odds ratio, 0.79; 95% confidence interval, 0.65-0.96; P = .015), but not a significant predictor in the TAVR arm. In patients with a small sinotubular junction, the prevalence of PPM in the SAVR arm was higher (57.9% vs 2.9%; P < .001). Furthermore, among the propensity score-matched patients, the incidence of PPM in the SAVR arm was higher than that in the TAVR arm (26.3% vs 12.5%; P = .031).

CONCLUSIONS

In patients with a small sinotubular junction detected by preoperative computed tomography assessment, the incidence of PPM in patients undergoing SAVR was higher.