Preoperative tissue Doppler imaging differentiates beneficial from detrimental left ventricular hypertrophy in patients with surgical aortic stenosis. A postoperative morbidity study

Bauer, F.; Mghaieth, F.; Dervaux, N.; Donal, E.; Derumeaux, G.; Cribier, A.; Bessou, J.-P.
November 2008
Heart;Nov2008, Vol. 94 Issue 11, p1440
Academic Journal
Background: In a pressure overloaded left ventricle, regional systolic function has often deteriorated despite normal ejection fraction. Objective: To correlate regional systolic function obtained by tissue Doppler imaging (TDI) with improvement in functional status after aortic valve replacement in patients with aortic stenosis (AS). Methods and results: 24 hours before aortic valve replacement, 32 patients with severe AS underwent conventional and TDI echocardiography for systolic peak velocity, peak strain and peak strain rate measurement in the short-axis posterior wall. At follow-up, a composite end point of cardiovascular death, worsening of heart failure and limited exercise capacity was recorded. Before surgery, mean (SD) aortic valve area and pressure gradient were 0.69 (0.22) cm2 and 50(14) mm Hg, respectively. Ejection fraction was 61 (10)% and septal thickness was 15 (3) mm. Fourteen events were recorded but no cardiac death. By using the multivariate regression analysis, systolic peak strain rate (p = 0.003) was the strongest predictor of limited recovery after aortic valve replacement. The peak strain rate cut-off point was 2/s by receiver operating characteristic analysis. Conclusion: Irrespective of ejection fraction and thickness, strain rate is a determinant which predicts recovery after aortic valve replacement in patients with severe AS.


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