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Table 5 Segmental analysis of wall motion score index (WMSI) 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 strain Normal Abnormal
Follow-up strain Deteriorated Unchanged Improved Deteriorated Unchanged Improved
n 44 162 55 2 52 75
Strain (mean ± SD)       
   Preop -21 ± 5 -17 ± 4 -15 ± 3 -1 ± 4 -6 ± 5 -4 ± 6
   Postop -12 ± 6 -17 ± 4 -24 ± 4 7 ± 6 -8 ± 5 -16 ± 6
   Post-pre-difference -6 ± 3 -6 ± 3 -7 ± 4 -1 ± 1 -3 ± 3 -4 ± 4
WMSI (mean ± SD)       
   Preop 1.4 ± 0.5 1.3 ± 0.5 1.4 ± 0.4 2.6 ± 0.1 1.9 ± 0.7 2.1 ± 0.8
   Postop 1.2 ± 0.3 1.3 ± 0.4 1.3 ± 0.4 2.6 ± 0.1 1.7 ± 0.7 1.6 ± 0.6
   Post-pre-difference 1.2 ± 0.4 1.1 ± 0.4 1.0 ± 0.4 1.0 ± 0.0 1.1 ± 0.6 1.4 ± 0.5
WMSI (segments; n (%))       
   Preop       
Normal 26 (59) 83 (51) 25 (45) 0 (0) 10 (19) 15 (20)
Abnormal 18 (41) 79 (49) 30 (55) 2 (100) 42 (81) 60 (80)
   Postop       
Deteriorated 1 (2) 8 (5) 5 (9) 0 (0) 7 (13) 1 (1)
Unchanged 34 (77) 136 (84) 45 (82) 2 (100) 32 (62) 44 (59)
Improved 9 (20) 18 (11) 5 (9) 0 (0) 13 (25) 30 (40)
Transmurality (segments; n (%))       
   Postop       
Normal (<1%) 40 (91) 130 (80) 44 (80) 1 (50) 27 (52) 41 (55)
≥ 1% 4 (9) 32 (20) 11 (20) 1 (50) 25 (48) 34 (45)
> 50% 1 (2) 11 (7) 3 (5) 1 (50) 16 (31) 18 (24)
  1. Segmental analysis of wall motion score index (WMSI) pre and post PCI and infarction transmurality post PCI calculated for the different outcomes of strain (ε) pre-PCI, in turn related to the different outcomes postoperatively (deteriorated, unchanged and improved).