Tei index to assess perioperative left ventricular systolic function in patients undergoing mitral valve repair N. Mabrouk-Zerguini, P. Léger, S. Aubert,

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Presentation transcript:

Tei index to assess perioperative left ventricular systolic function in patients undergoing mitral valve repair N. Mabrouk-Zerguini, P. Léger, S. Aubert, R. Ray, P. Leprince, B. Riou, P. Coriat, A. Ouattara British Journal of Anaesthesia Volume 101, Issue 4, Pages 479-485 (October 2008) DOI: 10.1093/bja/aen212 Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

Fig 1 Measurement of Tei index. (a) The interval (a) represents the interval between the cessation and onset of mitral inflow (mid-oesophageal four-chamber view). This time corresponds to the sum of isovolumetric contraction, ejection time, and isovolumetric relaxation. (b) Ejection time (b) is measured from the pulsed-wave Doppler recordings of the left ventricular outflow signal (deep transgastric view). The Tei index is defined as the sum of the times of isovolumetric contraction and relaxation times (a–b) divided by the ejection time (b). British Journal of Anaesthesia 2008 101, 479-485DOI: (10.1093/bja/aen212) Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

Fig 2 (a) Individual variations of fractional area changes and (b) Tei index before and after mitral valve repair. British Journal of Anaesthesia 2008 101, 479-485DOI: (10.1093/bja/aen212) Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

Fig 3 Relationship between preoperative Tei index and postoperative left ventricular fractional area changes (n=23, R=−0.613, P=0.001). British Journal of Anaesthesia 2008 101, 479-485DOI: (10.1093/bja/aen212) Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

Fig 4 (a) Correlation existing between observed (FACo) and predicted (FACp) fractional area changes (FAC) using the Tei index in 23 patients included in the study. FACp was calculated using the following formula: FACp=61−Tei index×0.41 (R=−0.64, P<0.001). (b) Bias and variation of the measured FAC after mitral valve repair and the predicted FAC by using the Tei index. The dotted lines represent ±2 standard deviations (precisions of the bias, according to the Bland-Altman method). British Journal of Anaesthesia 2008 101, 479-485DOI: (10.1093/bja/aen212) Copyright © 2008 British Journal of Anaesthesia Terms and Conditions