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Observational Study
Copyright: ©Author(s) 2026.
World J Gastrointest Surg. Aug 27, 2026; 18(8): 118103
Published online Aug 27, 2026. doi: 10.4240/wjgs.118103
Table 1 Management at initial hospitalization
Management
All
Occlusive
Nonocclusive mesenteric ischemia
Unclear
Embolism1
Thrombosis1
Unclear1
Inferior mesenteric artery
Superior mesenteric vein
Number of patients20311603630171237
Median age at index hospitalization in years (interquartile range)74 (64-80)74 (70-84)78.5 (70-84)72.5 (62-82)77 (65-81)63 (51-71)79.5 (69-81)72 (64-80)
Revascularization45725814
Revascularization and bowel resection191153
Bowel resection7131413126617
Conservative treatment686121811516
Table 2 The 3- and estimated 5-year overall and post-discharge survival and causes of death for subtypes of acute mesenteric ischemia, n (%)
AMI subtypeOverall (including in-hospital deaths) survival (%), 95%CI
Post-discharge survival (%), 95%CI
Causes of death
3-year
Estimated 5-year
3-year
Estimated 5-year
New AMI event
Other cardiovascular event
Miscellaneous causes of death
Unknown cause of death
SMA embolism12.8 (5.7-29.1)12.8 (5.7-29.1)45.5 (23.8-86.8)45.5 (23.8-86.8)-6 (100.0)--
SMA thrombosis15.0 (10.6-21.1)10.8 (7.1-16.4)46.7 (35.6-61.2)33.5 (23.2-48.4)9 (20.0)17 (37.8)15 (33.3)4 (8.9)
SMA unclear occlusion14.3 (9.2-22.2)10.7 (6.2-18.5)47.2 (33.4-66.7)35.7 (22.3-57.1)4 (16.0)10 (40.0)6 (24.0)5 (20.0)
Inferior mesenteric artery occlusion40.0 (27.4-58.5)30.3 (18.3-50.1)53.3 (38.2-74.5)41.3 (26.3-64.7)-10 (58.8)6 (35.3)1 (5.9)
Superior mesenteric vein occlusion52.0 (35.7-75.8)35.5 (28.8-72.0)76.5 (58.7-99.5)68.0 (47.9-96.5)-1 (20.0)3 (60.0)1 (20.0)
Non-occlusive mesenteric ischemia19.0 (10.2-35.5)19.0 (10.2-35.5)66.7 (44.7-99.5)66.7 (44.7-99.5)-2 (50.0)2 (50.0)-
Unclear19.2 (13.3-27.7)16.3 (10.8-24.6)62.2 (48.3-79.9)53.1 (39.0-72.3)1 (5.0)8 (40.0)7 (35.0)4 (20.0)
P valueP < 0.001P < 0.001P = 0.3P = 0.1P = 0.278
Table 3 Univariable and multivariable analysis evaluating the risk factors for mortality for all patients with acute mesenteric ischemia
Variable
Hazard ratio (95%CI)
P value
Univariable analysis
Sex (female)0.99 (0.68-1.41)0.936
Age1.05 (1.03-1.07)< 0.001
Disability (yes)2.95 (2.05-4.24)< 0.001
Diabetes (yes)0.95 (0.55-1.64)0.867
Smoking
Yes0.57 (0.31-1.06)0.074
Quit after AMI0.39 (0.09-1.58)0.186
Antithrombotic (yes)0.63 (0.42-0.93)0.020
Bowel resection (yes)1.30 (0.68-2.48)0.422
Age-adjusted Charlson index1.25 (1.16-1.34)< 0.001
AMI type
Unclear0.62 (0.37-1.02)0.057
IMA occlusion0.73 (0.43-1.25)0.248
NOMI0.31 (0.11-0.85)0.022
SMV occlusion0.33 (0.13-0.82)0.016
Multivariable analysis
Age1.04 (1.01-1.06)< 0.001a
Disability (yes)1.86 (1.22-2.81)0.003a
Smoking
Yes0.70 (0.37-1.33)0.275
Quit after AMI0.49 (0.11-2.17)0.347
Antithrombotic (yes)0.40 (0.25-0.63)< 0.001a
Age-adjusted Charlson index1.17 (1.06-1.28)0.001a
AMI type
Unclear0.78 (0.46-1.32)0.354
IMA occlusion0.60 (0.34-1.05)0.073
NOMI0.19 (0.06-0.56)0.002a
SMV occlusion1.01 (0.39-2.61)0.983
Table 4 Univariable and multivariable analysis evaluating the risk factors for mortality for patients with superior mesenteric artery thrombosis
Variable
Hazard ratio (95%CI)
P value
Univariable analysis
Age1.04 (1.00-1.07)0.011
Sex (female)0.83 (0.45-1.49)0.527
Disability (yes)2.74 (1.48-5.08)0.001
Smoking (yes)0.71 (0.21-2.31)0.569
Hypertension (yes)1.78 (0.62-4.99)0.279
Atherosclerosis (yes)0.68 (0.89-4.38)0.090
Age-adjusted Charlson index1.16 (1.02-1.31) 0.019
Antithrombotic (yes)0.29 (0.12-0.64)0.002
Revascularization (yes)0.84 (0.45-1.54)0.565
Bowel resection (yes)5.06 (1.18-21.53)0.028
Multivariable analysis
Age1.02 (0.96-1.08)0.429
Disability (yes)6.62 (2.19-20.06)< 0.001a
Atherosclerosis (yes)2.18 (0.51-9.22)0.288
Antithrombotic (yes)0.07 (0.01-0.38)0.002a
Bowel resection (yes)1.83 (0.32-10.26)0.490
Age-adjusted Charlson index0.90 (0.70-1.16)0.410


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