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Table 7 Parameters of left ventricular 18-segment myocardial WE according to sex and age

From: Echocardiographic reference ranges for noninvasive left ventricular 18-segment myocardial work index and work efficiency in a healthy Asian population

 

 < 30 years (n = 116)

30–40 years (n = 144)

40–50 years (n = 94)

 ≥ 50 years (n = 57)

p-value

Men

Women

 

Men (n = 59), median (IQR)

Women (n = 57), median (IQR)

Men (n = 72), median (IQR)

Women (n = 72), median (IQR)

Men (n = 41), median (IQR)

Women (n = 53), median (IQR)

Men (n = 23), median (IQR)

Women (n = 34), median (IQR)

Men

Women

R

p-value

R

p-value

Anteroseptal WE (%)

 Basal

93 (88–94)

94 (89–98)

91 (87–95)

93 (89–95)

91 (86–96)

94 (90–97)*

89 (87–93)

91 (86–96)

0.496

0.139

-0.118

0.101

-0.102

0.136

 Middle

97 (94–98)

98 (96–99)*

97 (95–99)

98 (95–99)

98 (94–99)

98 (96–99)

97 (94–99)

97 (95–99)

0.851

0.738

0.013

0.857

-0.041

0.550

 Apical

98 (95–99)

97 (96–99)

97 (96–99)

98 (96–99)

98 (96–99)

97 (96–99)

98 (95–99)

98 (96–99)

0.755

0.314

0.016

0.829

0.028

0.687

Septal WE (%)

 Basal

95 (91–97)

96 (92–98)

96 (93–98)c

96 (92–98)

95 (90–97)

95 (92–97)

92 (87–95)

95 (91–97)

0.046

0.350

-0.083

0.250

-0.129

0.059

 Middle

95 (90–97)

97 (94–98)*

95 (92–98)

98 (95–99)*

96 (91–98)

97 (94–98)

96 (93–97)

97 (95–99)

0.580

0.230

0.094

0.193

-0.020

0.773

 Apical

98 (97–99)

98 (96–99)

98 (95–99)

98 (97–99)

99 (97–99)

98 (98–99)

99 (98–99)

98 (97–99)

0.051

0.978

0.109

0.131

-0.027

0.694

Inferior WE (%)

 Basal

96 (94–97)

97 (94–99)

96 (94–98)

97 (94–98)

96 (93–98)

96 (93–98)

95 (92–98)

96 (93–98)

0.689

0.314

-0.016

0.821

-0.122

0.074

 Middle

96 (93–98)

96 (92–98)

95 (92–98)

96 (94–98)*

96 (93–98)

97 (95–98)

95 (92–98)

98 (95–98)

0.739

0.704

-0.010

0.890

0.052

0.447

 Apical

98 (96–99)

98 (95–99)

98 (95–99)

98 (95–99)

98 (96–99)

98 (96–99)

98 (94–98)

97 (95–98)

0.341

0.281

-0.030

0.676

-0.080

0.239

Posterior WE (%)

 Basal

94 (91–97)

94 (92–97)

95 (91–97)

95 (93–98)

96 (92–98)

96 (94–98)

93 (90–97)

96 (94–98)

0.386

0.056

0.063

0.381

0.219

0.001

 Middle

97 (93–99)

97 (93–98)

96 (93–98)

98 (95–99)*

95 (90–98)

97 (94–99)

93 (86–97)

98 (96–99)*

0.096

0.190

-0.150

0.036

0.068

0.317

 Apical

97 (95–99)

99 (96–99)* a b

98 (95–99)

98 (95–99)c

96 (94–99)

97 (94–99)

95 (88–99)

95 (93–98)

0.081

 < 0.001

-0.152

0.034

-0.271

 < 0.001

Lateral WE (%)

 Basal

96 (93–98)

96 (93–98)

97 (94–98)

97 (94–98)

97 (94–98)

96 (95–99)

96 (93–99)

96 (95–97)

0.775

0.881

0.071

0.324

0.065

0.343

 Middle

97 (93–99)

97 (94–99)

97 (92–99)

98 (95–99)*

97 (95–98)

98 (96–99)

97 (95–98)

98 (96–99)*

0.410

0.174

-0.093

0.194

0.104

0.127

 Apical

98 (95–99)

97 (96–99)

97 (94–99)

98 (96–99)*

98 (96–99)

98 (96–99)

98 (97–99)

97 (93–99)

0.152

0.444

0.051

0.483

-0.036

0.600

Anterior WE (%)

 Basal

96 (93–98)

97 (92–99)

96 (92–97)

96 (93–98)

95 (91–98)

96 (94–98)

96 (93–97)

94 (92–97)

0.299

0.123

-0.101

0.160

-0.086

0.209

 Middle

97 (93–99)

96 (94–99)

97 (90–99)

98 (95–99)

97 (94–99)

97 (95–99)

96 (93–98)

96 (95–98)

0.832

0.358

-0.039

0.588

-0.007

0.913

 Apical

96 (92–98)

96 (94–99)

96 (92–99)

98 (95–99)*

98 (95–99)

98 (94–99)

96 (92–98)

98 (95–99)

0.024

0.192

0.083

0.250

0.085

0.212

 Average WE of the anteroseptal wall (%)

95 (93–97)

96 (94–97)

95 (92–96)

96 (93–97)*

95 (92–97)

96 (94–97)

95 (93–96)

95 (92–97)

0.873

0.303

-0.060

0.402

-0.050

0.466

 Average WE of the septal wall (%)

96 (94–97)

97 (94–98)*

96 (93–97)

96 (95–98)*

95 (94–97)

96 (95–97)

95 (94–96)

96 (94–98)

0.885

0.618

0.027

0.713

-0.089

0.194

 Average WE of the inferior wall (%)

96 (94–97)

96 (94–98)

96 (94–97)

97 (95–98)

96 (95–98)

96 (95–98)

95 (93–97)

96 (95–97)

0.524

0.573

-0.023

0.749

-0.018

0.795

 Average WE of the posterior wall (%)

95 (93–97)

96 (95–97)

95 (94–97)

96 (95–97)*

95 (93–97)

96 (95–97)

94 (90–96)

96 (95–97)*

0.084

0.577

-0.122

0.089

0.018

0.787

 Average WE of the lateral wall (%)

97 (93–98)

96 (94–97)

96 (93–97)

97 (95–98)*

97 (95–98)

97 (96–98)

96 (95–97)

97 (95–98)

0.337

0.345

0.032

0.661

0.089

0.190

 Average WE of the anterior wall (%)

96 (94–97)

96 (93–98)

96 (93–97)

97 (94–98)*

96 (93–97)

96 (94–98)

95 (93–97)

96 (93–97)

0.615

0.151

-0.042

0.564

0.009

0.900

 Average WE of the basal level (%)

94 (92–96)

95 (93–96)

95 (93–95)

95 (94–96)

94 (92–96)

95 (93–96)

93 (92–95)

94 (93–96)

0.342

0.509

-0.071

0.326

-0.010

0.881

 Average WE of the middle level (%)

96 (93–97)

96 (94–98)

96 (94–97)

97 (96–98)*

95 (94–98)

97 (95–98)*

95 (93–96)

97 (95–98)*

0.745

0.154

-0.064

0.374

0.103

0.133

 Average WE of the apical level (%)

97 (96–98)

97 (96–98)

96 (95–98)

98 (96–98)*

97 (96–98)

97 (96–98)

97 (95–98)

97 (95–98)

0.172

0.139

0.063

0.379

-0.058

0.395

  1. IQR interquartile range, WE work efficiency. *P-value < 0.05 vs. men. aSignificant difference between < 30 years of age and 40 to 50 years of age. bSignificant difference between < 30 years of age and ≥ 50 years of age. cSignificant difference between 30 to 40 years of age and ≥ 50 years of age
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Cardiovascular Ultrasound

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