Clinical bottom line
Acute mesenteric ischemia (AMI) remains a life-threatening vascular emergency with high morbidity and mortality. Recent advancements emphasize early diagnosis, rapid revascularization, and minimally invasive endovascular techniques, which have improved outcomes compared to traditional open surgery alone. However, timely recognition and individualized management strategies remain critical, as delays significantly worsen prognosis. Multidisciplinary approaches integrating imaging, endovascular intervention, and selective surgical exploration represent the current standard of care in specialized centers (Lim et al., 2019; Gries et al., 2024).
What the evidence shows
AMI results from sudden interruption of intestinal blood flow, most commonly due to arterial embolism or thrombosis, leading to bowel ischemia and necrosis if untreated. Early diagnosis is challenging due to nonspecific symptoms but is crucial for survival. Computed tomography angiography (CTA) is the preferred diagnostic modality, enabling rapid assessment of mesenteric vessels and bowel viability (Abdelmonem Heba et al., 2022).
Historically, open surgical revascularization and bowel resection were the mainstays of treatment. However, the endovascular era has introduced less invasive options such as percutaneous transluminal angioplasty, stenting, and thrombolysis. Lim et al. (2019) describe how endovascular techniques have become first-line interventions in many centers, especially for arterial occlusive AMI, offering reduced perioperative morbidity and faster recovery. Gries et al. (2024) provide a comprehensive review highlighting that hybrid approaches combining endovascular revascularization with selective laparoscopic or open bowel assessment optimize outcomes by minimizing surgical trauma while ensuring bowel viability.
Consensus guidelines increasingly support a laparoscopic-first approach for abdominal emergencies, including AMI, to reduce surgical morbidity and facilitate earlier intervention when bowel necrosis is suspected (Sermonesi et al., 2023). This minimally invasive strategy allows direct visualization and resection of nonviable bowel while preserving as much intestine as possible.
Despite these advances, the overall prognosis remains guarded, with mortality rates still reported between 30-70%, largely dependent on time to diagnosis and treatment. Early intervention within hours of symptom onset is associated with significantly improved survival (Lim et al., 2019; Gries et al., 2024).
Caveats and uncertainty
Many studies on AMI management are observational or retrospective, limiting high-level evidence. The rarity and heterogeneity of AMI presentations complicate randomized controlled trials. Patient selection for endovascular versus open surgery is often individualized based on anatomy, comorbidities, and institutional expertise, which may introduce bias in outcome comparisons.
The optimal timing and extent of surgical exploration after endovascular revascularization remain debated. Some patients may require delayed laparotomy if bowel viability is uncertain or deteriorates after initial intervention. The role of systemic anticoagulation and thrombolytic therapy also varies and lacks standardized protocols.
Furthermore, while laparoscopic approaches show promise, their applicability in hemodynamically unstable patients or those with extensive ischemia is limited. The availability of advanced endovascular and laparoscopic expertise is not universal, potentially restricting widespread adoption.
How this may change practice
Clinicians should maintain a high index of suspicion for AMI in patients with acute abdominal pain and vascular risk factors, facilitating prompt CTA imaging. Early involvement of multidisciplinary teams including vascular surgery, interventional radiology, and gastrointestinal surgery is essential.
Endovascular revascularization should be considered as first-line therapy in suitable patients, with laparoscopic assessment reserved for bowel evaluation and resection when indicated. This approach may reduce surgical morbidity and improve survival compared to open surgery alone.
Institutions should develop protocols integrating rapid diagnostic pathways and hybrid treatment algorithms to optimize timing and coordination of interventions. Training in minimally invasive and endovascular techniques for AMI management should be prioritized to expand access.
Ongoing research is needed to define standardized treatment algorithms, refine patient selection criteria, and evaluate long-term outcomes of combined endovascular and laparoscopic strategies.