Vascular bowel disease remains a socially significant and potentially fatal condition (if it develops into AMI), primarily due to delayed diagnosis. Blood biomarkers are theoretically ideal for early risk stratification (like troponins in myocardial infarction). However, the existing evidence base is characterized by low quality and high heterogeneity, which hinders their use in clinical practice. Therefore, there is an urgent and unmet clinical need for high-quality, methodologically rigorous research to validate biomarkers in MI. A current study (MESMARK) is to be undertaken to identify combinations of biomarkers that can reliably identify mesenteric ischemia (MI) and distinguish between non-transmural and transmural clinical relevant ischemia.

Inclusion Criteria:

• 18 years or older, all sex
• Initial decision, the presence of angio-visualisation of the MA and suspicion of mesenteric arteries diseases
• Patient's consent to participate in the study
• No pregnancy, no history of major operations on MA, the gastrointestinal tract and digestive organs (except appendectomy, endoscopic polypectomy).

Exclusion Criteria:

• Consent declined by patient or relatives
• Failure to meet inclusion criteria