OBJECTIVE

To develop the adapted scale for analysis of necessary septal myectomy (SME) in aortic valve replacement (AVR) for severe aortic stenosis.

MATERIAL AND METHODS

A retrospective and prospective analysis included 180 patients with severe aortic stenosis and interventricular septal hypertrophy ≥1.5 cm who underwent surgery between 2012 and 2024. Age of patients was 64 (61; 67.3) years. There were 96 (53.3%) men and 84 (46.7%) women. Heart failure NYHA class III was observed in 98 patients (54.4%), class II in 54 (30.0%) patients. The AVR+SME group included 100 patients, and the AVR group included 80 patients. Both groups did not differ in preoperative clinical and echocardiography characteristics.

RESULTS

Logistic regression was performed to identify significant predictors. Multivariate analysis provided logistic function including 3 predictors: IVST / PWT, indexed LV myocardial mass and aortic annulus diameter. Regression model included significant factors obtained at the first stage of analysis. The obtained prognostic model was significant (p<0.01). Sensitivity was 77.0%, specificity — 83.8%. IVST/ PWT and indexed LV myocardial mass increase the probability of concomitant SME, while aortic annulus diameter has inverse relationship. The cut-off point for indexed LV myocardial mass is 167.5 g, for IVST/ PWT — 1.15, for aortic annulus diameter — 23.5 mm. Further analysis was performed by assigning a score to each predictor. The total score in two groups was determined. Thus, total score > 83.5 indicates advisability of SME in aortic valve replacement.

CONCLUSION

The new scale for predicting the need for SME in AVR will improve postoperative results.