Table 1: Comparison of the groups before and after bariatric surgery
Echocardiographic index
Pre-bariatric
surgery
Post-bariatric
surgery
P value
BMI (g/m2)
42.4 ± 4.6
31.5 ± 2.6
<0.001
IVS (mm)
10.17 ± 1.17
8.15 ± 0.9
<0.001
LVPW (mm)
10.1 ± 1
8.2 ± 1
<0.001
LVEDD (mm)
47.9 ± 4.2
43.6 ± 3.5
<0.001
LVESD (mm)
29.7 ± 3.6
25.04 ± 3.08
<0.001
LVFS (%)
37.91 ± 5.7
42.6 ± 6
< 0.001
LA diameter (mm)
40.8 ± 2.9
34.9 ± 4
<0.001
LVOT velocity (m/sec)
0.96 ± 0.17
1 ± 0.16
0.04
A wave
0.83 ± 0.23
0.75 ± 0.16
0.0625
E wave
0.79 ± 0.22
0.98 ± 0.16
< 0.001
E/A ratio
0.98 ± 0.3
1.3 ± 0.26
< 0.001
DT (msec)
173.7 ± 44.5
190.1 ± 36.9
0.0246
E/E’ ratio
5.2 ± 0.4
4.9 ± 0.6
0.64
LA volume index (mm/m2)
30.9 ± 7
28.9 ± 6.7
0.8
RVSP (mmHg)
30.4 ± 11.9
22.8 ± 5.7
0.0046
RVMPI
0.37 ± 0.12
0.24 ± 0.06
<0.001
IVRT (msec)
109.6 ± 11.3
57.1 ± 25.4
< 0.001
RVOT-AT (msec)
91.4 ± 17.5
107.2 ± 12.35
<0.001
RV-S wave (cm/sec)
11.92 ± 3.5
13.08 ± 2.9
<0.001
TAPSE (mm)
26.3 ± 5.8
25.6 ± 5.5
0.56
LVEDV (mls)
169.4 ± 43.2
120.36 ± 19.6
<0.001
LVESV (mls)
68.87 ± 23
39.2 ± 10
<0.001
LVSV (mls)
100.5 ± 29.8
81.1 ± 18.2
0.001
LVEF (%)
59 ± 8
67 ± 7
<0.001
LVmass (gr)
111 ± 23.5
92.8 ± 15.5
<0.001
1
RVEDV (mls)
143.2 ± 33.2
109.6 ± 15.7
<0.001
RVESV (mls)
57.2 ± 20.8
35.1 ± 10.4
<0.001
RVSV (mls)
86 ± 20.4
74.5 ± 14.3
0.0048
RVEF (%)
60 ± 9
68 ± 8.2
0.0001
RVmass (gr)
95.2 ± 19.8
67.3 ± 16.3
<0.001
LV-global strain (%)
-20.2 ± 1.7
-26.5 ± 1.86
<0.001
RV-global strain (%)
-11.7 ± 4
-17.52 ± 3.7
<0.001
RV-free wall strain (%)
-11.8 ± 6
-18.3 ± 4.4
<0.001
¥ Abbreviations: BMI: body mass index, IVS: interventricular septal thickness, LVPW: thickness of left
ventricular posterior wall, LVEDD: left ventricular end-diastolic diameter, LVESD: left ventricular endsystolic diameter, LVFS: left ventricular fractional shortening, LA diameter: left atrial diameter, LVOT:
left ventricular outflow tract, A wave: late diastolic filling, E wave: early diastolic filling, E/A ratio:
diastolic filling, DT: deceleration time, RVSP: right ventricular systolic pressure, IVRT: right ventricular
isovolumic relaxation time, RVOT-AT: right ventricular outflow tract – acceleration time, RV-S wave:
right ventricular-systolic wave of the free wall, TAPSE: tricuspid annular plane systolic excursion, LV:
left ventricular, RV: right ventricular, LVEDV: LV end-diastolic volume, LVESV: LV end-systolic volume ,
LVSV:LV stroke volume LVEF: LV ejection fraction, LVmass: LV mass RVEDV: RV end-diastolic volume,
RVESV:RV end-systolic volume, RVSV: RV stroke volume, RVEF: RV ejection fraction, RVmass: RV
mass.
2
Table 2: Comparison of surgical techniques (sleeve gastrectomy vs. Gastric bypass) before surgery
Sleeve gastrectomy-pre
surgery
Gastric bypass – pre-surgery
P value
BMI (g/m2)
43.6 ± 5
40.4 ± 4.2
0.416
IVS (mm)
10 ± 1
10.1 ± 1
0.442
LVPW (mm)
10.1 ± 1.1
10 ± 0.7
0.624
LVEDD (mm)
47.9 ± 4
48.4 ± 4.1
0.622
LVESD (mm)
29.2 ± 3.1
29.5 ± 3
0.763
LVFS (%)
47.3 ± 4
47.8 ± 4.1
0.87
LA diameter (mm)
41.2 ± 3.7
42 ± 2
0.663
LVOT velocity (m/sec)
0.9 ± 0.15
0.93 ± 0.16
0.342
A wave
0.89 ± 0.23
0.87 ± 0.19
0.52
E wave
0.78 ± 0.19
0.95 ± 0.29
0.865
E/A ratio
0.91 ± 0.27
0.95 ±0.3
0.926
DT (msec)
180.8 ± 31.6
169 ± 33.6
0.238
RVSP (mmHg)
21.2 ± 18
27 ± 12.2
0.739
RVMPI
0.39 ± 0.13
0.32 ± 0.09
0.622
IVRT (msec)
113 ± 7.6
105.8 ± 14.3
0.25
RVOT-AT (msec)
87.8 ± 21.4
98.2 ± 14.7
0.176
RV S wave (cm/sec)
13.25 ± 4.5
10.56 ± 2
0.07
TAPSE (mm)
27.2 ± 7
26.1 ± 4.2
0.671
LVEDV (mls)
169.6 ± 65.4
142.4 ± 29.5
0.23
LVESV (mls)
61.9 ± 24.6
62.8 ± 26.5
0.528
LVSV (mls)
107.8 ± 44.2
79.6 ± 14.9
0.023
3
LVEF(%)
63.3 ± 6.6
57.2 ± 11.5
0.032
LVmass (gr)
115.5 ± 25.5
106.4 ± 16.4
0.969
RVEDV (mls)
146.5 ± 29.6
128 ± 27
0.907
RVESV (mls)
57.3 ± 22.4
51.5 ± 18.2
0.689
RVSV (mls)
89.2 ± 13.7
76.4 ± 17.8
0.742
RVEF (%)
61.9 ± 9
59.9 ± 9.5
0.702
RVmass (gr)
94.87 ± 16.7
89.6 ± 19.3
0.56
LV-global strain (%)
-20.2 ± 1.7
-19.4 ± 1.1
0.27
RV-global strain (%)
-10.1 ± 4
11.8 ± 3.2
0.36
RV free wall strain (%)
-12.6 ± 5.1
11.3 ± 2.9
0.54
¥ Abbreviations: BMI: body mass index, IVS: interventricular septal thickness, LVPW: thickness of left
ventricular posterior wall, LVEDD: left ventricular end-diastolic diameter, LVESD: left ventricular endsystolic diameter, LVFS: left ventricular fractional shortening, LA diameter: left atrial diameter, LVOT:
left ventricular outflow tract, A wave: late diastolic filling, E wave: early diastolic filling, E/A ratio:
diastolic filling, DT: deceleration time, RVSP: right ventricular systolic pressure, IVRT: right ventricular
isovolumic relaxation time, RVOT-AT: right ventricular outflow tract – acceleration time, RV-S wave:
right ventricular-systolic wave of the free wall, TAPSE: tricuspid annular plane systolic excursion, LV:
left ventricular, RV: right ventricular, LVEDV: LV end-diastolic volume, LVESV: LV end-systolic volume ,
LVSV: LV stroke volume LVEF: LV ejection fraction, LVmass: LV mass RVEDV: RV end-diastolic volume,
RVESV: RV end-systolic volume, RVSV: RV stroke volume, RVEF: RV ejection fraction, RVmass: RV
mass.
4
Table 3: Comparison of surgical techniques (sleeve gastrectomy vs. Gastric bypass) after surgery
Sleeve gastrectomy-postsurgery
Gastric bypass postsurgery
P value
BMI (g/m2)
31.4 ± 2.8
30 ± 1.9
0.416
IVS (mm)
8 ± 1.1
8.2 ± 0.6
0.442
LVPW (mm)
8.3 ± 1.1
8.4 ± 0.98
0.624
LVEDD (mm)
43.2 ± 3.3
44 ± 4.2
0.622
LVESD (mm)
24.9 ± 3.1
25 ± 2.4
0.763
LVFS (%)
42.2 ± 7.4
43.1 ± 3.4
0.87
LA diameter (mm)
35.4 ± 4.6
36.2 ± 3.6
0.663
LVOT velocity (m/sec)
1.02 ± 0.16
1 ± 0.16
0.342
A wave
0.74 ± 0.19
0.75 ± 0.17
0.52
E wave
0.96 ± 0.15
0.98 ± 0.18
0.865
E/A ratio
1.3 ± 0.3
1.34 ± 0.27
0.926
DT (msec)
184 ± 40.2
190.8 ± 42.5
0.238
RVSP (mmHg)
31.5 ± 10.1
24.6 ± 0.4
0.739
RVMPI
0.25 ± 0.06
0.24 ± 0.03
0.622
IVRT (msec)
64.2 ± 21.8
70.3 ± 21.5
0.25
RVOT-AT (msec)
106.2 ± 11.2
106.3 ± 13.6
0.176
RV S wave (cm/sec)
13.9 ± 4
12.4 ± 1.3
0.22
TAPSE (mm)
24.4 ± 5.3
23.2 ± 5
0.671
LVEDV (mls)
123.3 ± 25.6
120.7 ± 15.8
0.23
LVESV (mls)
38.6 ± 10.3
43.1 ± 13
0.528
LVSV (mls)
84.7 ± 22.2
77.6 ± 16
0.023
LVEF(%)
68.2 ± 7
64.2 ± 9.5
0.032
LVmass (gr)
99.3 ± 19.6
93.8 ± 17.4
0.969
RVEDV (mls)
114 ± 10.5
113.9 ± 16
0.907
5
RVESV (mls)
36 ± 12
37.2 ± 12.2
0.82
RVSV (mls)
78 ± 11
76.7 ± 19.8
0.742
RVEF (%)
68.6 ± 9
66.7 ± 11
0.702
RVmass (gr)
71.7 ± 18
74.2 ± 19.3
0.865
LV-global strain (%)
-26.7 ± 1.3
-27.09 ± 2.4
0.71
RV-global strain (%)
-19.1 ± 3.7
-17 ± 4.1
0.951
RV free wall strain (%)
-19.2 ± 3.7
-16.9 ± 3.6
0.17
¥ Abbreviations: BMI: body mass index, IVS: interventricular septal thickness, LVPW: thickness of left
ventricular posterior wall, LVEDD: left ventricular end-diastolic diameter, LVESD: left ventricular endsystolic diameter, LVFS: left ventricular fractional shortening, LA diameter: left atrial diameter, LVOT:
left ventricular outflow tract, A wave: late diastolic filling, E wave: early diastolic filling, E/A ratio:
diastolic filling, DT: deceleration time, RVSP: right ventricular systolic pressure, IVRT: right ventricular
isovolumic relaxation time, RVOT-AT: right ventricular outflow tract – acceleration time, RV-S wave:
right ventricular-systolic wave of the free wall, TAPSE: tricuspid annular plane systolic excursion, LV:
left ventricular, RV: right ventricular, LVEDV: LV end-diastolic volume, LVESV: LV end-systolic volume ,
LVSV: LV stroke volume LVEF: LV ejection fraction, LVmass: LV mass RVEDV: RV end-diastolic volume,
RVESV: RV end-systolic volume, RVSV: RV stroke volume, RVEF: RV ejection fraction, RVmass: RV mas
6
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