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The Egyptian Heart Journal

Table 2 Echocardiographic measurements at the three timepoints

From: Right ventricle speckle tracking in bronchopulmonary dysplasia: one-year follow-up

 

Mean (SD) or Median [Q1; Q3]

p value

NO-BPD (n = 22)

BPD (n = 28)

T1

 HR (bpm)

164.5 (13.6)

164.8 (12.5)

0.942

 RA index (cm2/m2)

9.1 (1.6)

9.4 (2.1)

0.493

 TRPG (mmHg)

14 (8)

20 (7)

0.006

 TAPSE (mm)

10.1 (1.7)

9.7 (1.7)

0.378

 SW (cm/s)

9.8 [9; 11.7]

9.9 [9; 11.7]

0.537

 PAAT / RVET ratio

0.34 (0.09)

0.33 (0.08)

0.714

 GLS-RV (%)

23.9 (4.6)

22 (6.3)

0.215

 GLSR-RV (%)

2.62 [2.26; 3.16]

2.33 [1.92; 2.67]

0.062

 RV-FS (%)

47.3 [39.4; 51.5]

46.3 [34; 49.8]

0.226

 GLS-LV (%)

22 (3.2)

20.4 (3.3)

0.094

 GLSR-LV (%)

2.23 (0.51)

2.07 (0.41)

0.224

 

NO-BPD (n = 21)

BPD (n = 25)

 

T2

 HR (bpm)

138.9 (18.1)

145.7 (14.2)

0.176

 RA index (cm2 / m2)

8.8 [7.6; 9.5]

8.8 [7.5; 9.5]

0.384

 TRPG (mmHg)

13 (7)

17 (10)

0.180

 TAPSE (mm)

14.8 (2.1)

13.4 (2.4)

0.039

 SW (cm/s)

12.2 (1.7)

11.2 (1.6)

0.064

 PAAT / RVET ratio

0.38 (0.07)

0.39 (0.08)

0.401

 GLS-RV (%)

26 [21.2; 28.2]

24.1 [18.9; 27.9]

0.349

 GLSR-RV (%)

2.57 (0.88)

2.43 (0.82)

0.594

 RV-FS (%)

39.3 (13.7)

42.1 (13.5)

0.500

 GLS-LV (%)

22.8 (3.5)

22.8 (3.5)

0.995

 GLSR-LV (%)

2.3 (0.49)

2.07 (0.55)

0.157

 

NO-BPD (n = 15)

BPD (n = 16)

 

T3

 HR (bpm)

131 (16.6)

128.7 (17.6)

0.699

 RA index (cm2/m2)

8.3 (1.6)

9.9 (1.7)

0.007

 TRPG (mmHg)

9 (16)

15 (6)

0.011

 TAPSE (mm)

15.7 [13.8; 16.7]

14.7 [14.5; 15.9]

0.717

 SW (cm/s)

12.3 (2.1)

12.1 (1.6)

0.806

 PAAT / RVET ratio

0.37 (0.06)

0.41 (0.07)

0.05

 GLS-RV (%)

28 (6.1)

26 (4.1)

0.315

 GLSR-RV (%)

2.88 (0.85)

2.60 (0.75)

0.335

 RV-FS (%)

43.6 [35.6; 56.9]

41.7 [32.5; 46.4]

0.166

 GLS-LV (%)

23.8 (4.5)

24.4 (3.1)

0.671

 GLSR-LV (%)

2.28 [1.96; 2.57]

2.07 [1.76; 2.38]

0.349

  1. Classification in NO-BPD and BPD. Mean (Standard Deviation) for parametric variables and T-Student test for comparison between groups (p value). Median [interquartile range Q1; Q3] for nonparametric variables and U-Mann–Whitney test for comparison between groups (p value).
  2. HR: heart rate. BPM: beats per minute. T1: at 36 PMA or discharge. T2: between 5 and 9 months of life. T3: between 11 and 16 months of life.
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