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Table 3 Parameters of mechanical dyssynchrony at baseline and after 6 months of CRT

From: Echocardiographic markers of dyssynchrony as predictors of super-response to cardiac resynchronisation therapy – a pilot study

Parameter

I group (n = 20)

II group (n = 39)

Р

Systolic dyssynchrony index, (%)

At baseline

9.5±3.4

7.5±4.4

0.05

After 6 months

2.8±1.2a

3.1±1.2a

0.278

Mean changes

−6.4[−8.7;-4.3]

−2.8[− 8.2;-0.36]

0.044

Left ventricular pre-ejection period, (ms)

At baseline

160.5±31.2

131.5±29.5

0.002

After 6 months

127.7±22.8a

118.3±21.2a

0.292

Mean changes

−35.5[−53.7;-11.2]

−18.5[− 35.0;1.7]

0.043

Right ventricular pre-ejection period, (ms)

At baseline

102.1±21.4

95.4±18.6

0.249

After 6 months

106.4±16.7

103.3±26.2

0.716

Mean changes

9.5[−17.0;30.7]

14.5[−13.5;33.5]

0.512

Interventricular mechanical delay, (ms)

At baseline

57.5±28.3

39.7±24.2

0.024

After 6 months

19.9±15.9a

25.4±11.7

0.357

Mean changes

−47.0[−55.0;-13.0]

−11.0[−36.5;3.0]

0.054

Interventricular delay by TDI, (ms)

At baseline

110.2±66.1

71.6±57.9

0.038

After 6 months

58.4±56.7a

50.6±48.3a

0.653

Mean changes

−31.0[−120;12.5]

−20.5[−66.2;8.2]

0.165

Intraventricular delay by TDI, (ms)

At baseline

88.4±45.3

67.7±42.8

0.098

After 6 months

54.7±44.9a

36.9±25.5

0.568

Mean changes

−57.5[−80.2;-28.0]

−12.0[− 40.0;15.0]

0.005

  1. TDI – tissue Doppler imaging
  2. a – difference between baseline and postimplant level (р < 0.05)