Table 6: Effect of esmolol on the torsional and strain variables of LV after MI.
|
MI |
MI + ESMOLOL |
p |
|
|
LV torsion (o/mm) |
0.13 ± 0.37 |
0.08 ± 0.04 |
NS |
|
LV twist (o) |
7.21 ± 2.54 |
5.35 ± 2.39 |
p = 0.030 |
|
LV systolic torsion rate (o/s) |
52.73 ± 13.42 |
42.13 ± 15.72 |
p = 0.040 |
|
LV untwisting rate (o/s) |
-71.92 ± 24.76 |
-46.59 ± 19.83 |
p = 0.001 |
|
BASE |
|
|
|
|
Rotation (o) |
-5.79 ± 1.95 |
-4.71 ± 2.03 |
p = 0.005 |
|
Peak systolic rotation rate (o/s) |
-49.04 ± 16.02 |
-43.62 ± 20.85 |
NS |
|
Peak radial strain |
41.66 ± 13.95 |
34.19 ± 15.23 |
NS |
|
Peak systolic circumferential strain |
-13.18 ± 2.46 |
-10.39 ± 2.53 |
p < 0.001 |
|
APEX |
|
|
|
|
Rotation (o) |
2.22 ± 1.69 |
1.54 ± 1.64 |
NS |
|
Peak systolic rotation rate (o/s) |
17.97 ± 19.09 |
12.02 ± 10.65 |
NS |
|
Peak radial strain |
18.77 ± 13.9 |
18.02 ± 9.02 |
NS |
|
Peak systolic circumferential strain |
-9.38 ± 3.87 |
-6.72 ± 3.32 |
p = 0.026 |
LV Twist (0): peak difference in systolic rotations of LV apex and base as viewed from the apex, LV Torsion (0/cm): normalized twist: twist angle divided by the distance between the measured locations of base and apex, LV Systolic Torsion Rate (0/s): peak velocity of LV Torsion, LV Untwisting Rate (0/s): peak velocity of Untwisting, Rotation (0): peak systolic Rotation of base or apex, Peak Systolic Rotation Rate (0/s): peak velocity of basal or apical Rotation, Peak Radial Strain: peak radial deformation of base or apex, Peak Systolic Circumferential Strain: circumferential deformation of base or apex.
The values are averages ± standard deviation.