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Table 5 Prediction of volumetric response to CRT with Philips derived echocardiographic images

From: Comparison of strain parameters in dyssynchronous heart failure between speckle tracking echocardiography vendor systems

 

Univariate analysis (n = 88)

Receiver operating characteristics (n = 88)

Parameter

B

SD

p-value

C-statistic

Cut-off value

Philips SL-delay

58.897

38.368

0.129

0.564

0.000

TomTec SL-delay

−23.910

16.952

0.162

0.569

−0.080

Philips SRSsept

10.072

2.653

<0.001

0.697

0.790

TomTec SRSsept

3.842

0.997

<0.001

0.686

1.180

Philips SSI

7.346

2.257

0.002

0.661

0.830

TomTec SSI

3.860

0.863

<0.001

0.705

2.345

Philips LBBB-type (type 1 or 2 vs. 3)

20.091

5.418

<0.001

  

TomTec LBBB-type (type 1 or 2 vs. 3)

22.069

5.122

<0.001

  
  1. Prediction of volumetric response to CRT, with results of univariate regression analysis (B, SD and p-value) and receiver operating characteristics (C-statistic, R2 and cut-off). Univariate analyses are based on a change in LVESV on a continuous scale, while receiver operating characteristics are based on a cut-off of ≥15% reduction in LVESV
  2. Philips Philips QLAB, TomTec TomTec 2DCPA, B beta coefficient, SD standard deviation, SL-delay septal-to-lateral wall delay, SRSsept septal systolic rebound stretch, SSI systolic stretch index, LBBB-type septal strain pattern categorization according to Leenders et al