Association of decreased variation of coefficient R-R interval with ischemic colitis and small bowel obstruction.

Background: The parasympathetic nervous system exerts and controls intestinal tone. Several studies have suggested that the coefficient of the R-R intervals (CVRR) is useful for evaluating the parasympathetic nervous system.

Objectives: This study aimed to evaluate the relationship between gastrointestinal emergencies, specifically ischemic colitis (IC) and small bowel obstruction (SBO), and the autonomic nervous system.