@abosier65 Chronic Mesenteric ischemia usually causes pain after eating. The patient usually loses a significant amount of weight as they become fearful of eating. My mother-in-law was undiagnosed as she refused to see a doctor for a year of barely eating due to postprandial pain. Then she ended up in the ER in pain and vomiting. Imaging showed what they thought was a blockage and they waited 24 hours before doing exploratory surgery. By the time they operated, they discovered most of her intestine was dead from lack of blood flow. It is basically like a heart attack to the intestines. It is caused by atherosclerosis and plaque buildup.
It is a pretty rare diagnosis. But I had my husband get checked for it with an ultrasound and MRI with contrast. He does have narrowing of his mesenteric arteries. But no pain after eating. Two vascular doctors said there is no need for him to follow up again unless/until he ever develops pain after eating. They said his collaterals (smaller arteries) were carrying enough blood.