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Table 1 Baseline and echocardiographic characteristics of the study population

From: Relationship between electrocardiographic characteristics and subclinical left ventricular systolic dysfunction in isolated left bundle branch block patients

Variables

Total LBBB

N = 111

LBBB with

GLS>-20%

N = 52

LBBB with

GLS ≤ -20%

N = 59

P- values

Demographics

 Age, years

61.1 ± 10.7

61.0 ± 8.8

61.2 ± 12.2

0.92

 Female, n (%)

59 (53.2)

25 (48.1)

34 (57.6)

0.35

 Current smoking, n (%)

29 (26.1)

11 (21.2)

18 (30.5)

0.29

 Body surface area, m2

1.72 ± 0.18

1.70 ± 0.17

1.74 ± 0.20

0.27

 Heart rate, beats/min

76.0 ± 11.4

75.9 ± 11.0

76.0 ± 11.8

0.97

 Systolic blood pressure, mmHg

129.35 ± 21.13

130.48 ± 19.07

128.18 ± 23.52

0.19

 Diastolic blood pressure, mmHg

78.86 ± 12.41

79.81 ± 10.57

77.28 ± 13.17

0.13

Echocardiographic

 LV end-diastolic diameter, mm

51.13 ± 5.74

52.65 ± 6.17

49.80 ± 5.02

0.01

 Interventricular septum, mm

9.38 ± 1.05

9.47 ± 0.91

9.31 ± 1.08

0.31

 Posterior wall thickness, mm

9.02 ± 1.01

9.10 ± 1.03

8.93 ± 0.94

0.19

 Relative wall thickness

0.36 ± 0.04

0.35 ± 0.04

0.36 ± 0.03

0.22

 LV mass, g

172.06 ± 26.73

181.17 ± 27.46

161.92 ± 23.13

0.01

 LV mass index, g/m2

101.08 ± 15.74

107.54 ± 16.35

94.08 ± 13.31

0.02

 Geometry

  Normal geometry

78

24

54

< 0.001

  Eccentric hypertrophy

28

24

4

< 0.001

  Concentric remodeling

2

1

1

1.0

  Concentric hypertrophy

3

3

0

0.1

 LV end-diastolic volume, mL

107.46 ± 27.67

114.79 ± 25.85

101.01 ± 27.81

0.01

 LVEF, %

60.03 ± 5.65

57.15 ± 5.26

62.56 ± 4.73

< 0.001

 LV GLS, %

-20.00 ± 2.57

-17.70 ± 1.26

-22.02 ± 1.47

< 0.001

 LV septal longitudinal strain, %

-16.83 ± 2.41

-15.52 ± 1.22

-18.07 ± 1.31

< 0.001

 LV lateral longitudinal strain, %

-23.08 ± 2.52

-19.79 ± 1.30

-25.88 ± 1.51

< 0.001

 LAVI, mL/m2

32.90 ± 11.20

33.56 ± 10.67

32.37 ± 11.67

0.59

 Mitral E, m/s

0.62 ± 0.13

0.62 ± 0.14

0.63 ± 0.11

0.71

 Mitral E/A

0.77 ± 0.26

0.73 ± 0.18

0.81 ± 0.31

0.17

 Mitral septal E’, cm/s

5.12 ± 1.45

4.55 ± 1.19

5.59 ± 1.49

< 0.001

 Mitral lateral E’,cm/s

8.26 ± 1.40

7.73 ± 0.86

8.69 ± 1.60

< 0.001

 Mitral average E’,cm/s

6.80 ± 0.95

6.28 ± 0.66

7.21 ± 0.96

< 0.001

 Mitral average E/ E’

10.06 ± 2.55

10.76 ± 2.64

9.46 ± 2.32

0.02

 Ts-SD, ms

59.18 ± 14.25

66.62 ± 13.65

52.61 ± 11.29

< 0.001

 Ts-Dif (ms)

188.21 ± 63.01

196.25 ± 66.25

180.25 ± 59.80

< 0.001

 IVMD (ms)

60.50 ± 16.08

68.58 ± 16.12

52.45 ± 16.01

< 0.001

  1. Data are presented as mean ± SD or percentage
  2. Abbreviations: A late diastolic flow velocity, E early diastolic flow velocity, E’ early diastolic annular velocity, EF ejection fraction, IVMD interventricular mechanical delay, GLS global longitudinal strain, HDL high-density lipoprotein, LAVI left atrial volume index, LBBB left bundle branch block, LDL low-density lipoprotein, LV left ventricle, Ts time-to-peak longitudinal systolic strain, Ts-Dif, maximal difference in Ts between any 2 of the 18 segments of the LV, Ts-SD standard deviation of Ts from 18 LV segments
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Cardiovascular Ultrasound

ISSN: 1476-7120

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