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A stomach rumble, also known as a bowel sound, peristaltic sound, abdominal sound, bubble gut or borborygmus (pronounced / ˌ b ɔːr b ə ˈ r ɪ ɡ m ə s /; plural borborygmi), is a rumbling, growling or gurgling noise produced by movement of the contents of the gastrointestinal tract as they are propelled through the small intestine by a series of muscle contractions called peristalsis. [1]
Often the pressure is in the fundus of the stomach, the esophagus or distention of the bowel. It is believed this leads to elevation of the diaphragm , and secondary displacement of the heart. This reduces the ability of the heart to fill and increases the contractility of the heart to maintain homeostasis.
The condition is characterised by chronic gastrointestinal symptoms relating to excessive gas retention including abdominal bloating with distension, flatulence, audible gurgling sounds, and chest and abdominal discomfort. [2] Some with the condition are also unable to vomit, or can only do so with great difficulty.
The gastrocolic reflex or gastrocolic response is a physiological reflex that controls the motility, or peristalsis, of the gastrointestinal tract following a meal. It involves an increase in motility of the colon consisting primarily of giant migrating contractions, in response to stretch in the stomach following ingestion and byproducts of digestion entering the small intestine. [1]
A gastric emptying scintigraphy test involves eating a bland meal that contains a small amount of radioactive material. An external camera scans the abdomen to locate the radioactive material. The radiologist measures the rate of gastric emptying at 1, 2, 3, and 4 hours after the meal. The test can help confirm a diagnosis of dumping syndrome.
While this relaxation may be voluntary, the overall process of rumination is still generally involuntary. Relaxation due to intra-abdominal pressure is another proposed explanation, which would make abdominal compression the primary mechanism. The third is an adaptation of the belch reflex, which is the most commonly described mechanism.
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The chronic form typically presents more gradually with abdominal pain after eating, unintentional weight loss, vomiting, and fear of eating. [ 1 ] [ 2 ] Risk factors for acute intestinal ischemia include atrial fibrillation , heart failure , chronic kidney failure , being prone to forming blood clots , and previous myocardial infarction . [ 2 ]