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Table 4 Segmental analysis of strain (ε) pre and post PCI and transmurality post-PCI

From: Longitudinal peak strain detects a smaller risk area than visual assessment of wall motion in acute myocardial infarction

PrePCI WMSI

Normal

Abnormal

Follow-up WMSI

Deteriorated

Unchanged

Deteriorated

Unchanged

Improved

n

7

152

15

141

75

WMSI (mean ± SD)

     

   Preop

1.0 ± 0.0

1.0 ± 0.0

1.6 ± 0.4

1.8 ± 0.6

2.3 ± 0.5

   Postop

1.7 ± 0.2

1.1 ± 0.1

2.3 ± 0.4

1.6 ± 0.6

1.3 ± 0.5

   Post-pre-difference

0.7 ± 0.2

0.1 ± 0.1

0.7 ± 0.2

-0.2 ± 0.2

-1.0 ± 0.3

Strain (mean ± SD)

     

   Preop

-15.1 ± 5.7

-16.6 ± 5.6

-11.8 ± 7.1

-11.4 ± 8.0

-9.4 ± 7.9

   Postop

-16.6 ± 5.2

-17.4 ± 5.2

-13.4 ± 8.1

-15.0 ± 7.7

-14.3 ± 6.8

   Post-pre-difference

-1.5 ± 5.1

-0.8 ± 6.5

-1.6 ± 3.7

-3.7 ± 7.3

-4.9 ± 8.3

Strain (segments; n (%))

     

   Preop

     

Normal

5 (71)

129 (85)

9 (60)

86 (61)

32 (43)

Abnormal

2 (29)

23 (15)

6 (40)

55 (39)

43 (57)

   Postop

     

Deteriorated

1 (14)

25 (16)

0 (0)

11 (8)

9 (12)

Unchanged

4 (57)

89 (59)

11 (73)

79 (56)

31 (41)

Improved

2 (29)

38 (25)

4 (27)

51 (36)

35 (47)

Transmurality (segments; n (%))

     

   Postop

     

Normal (<1%)

7 (100)

142 (93)

9 (60)

82 (58)

43 (57)

≥ 1%

0 (0)

10 (7)

6 (40)

59 (42)

32 (43)

> 50%

0 (0)

0 (0)

5 (33)

25 (18)

20 (27)

  1. Segmental analysis of strain (ε) pre and post PCI and infarction transmurality post-PCI calculated for normal and abnormal PCI wall motion score index (WMSI) preoperatively, in turn related to the different outcomes postoperatively (deteriorated, unchanged and improved).