Here is a brief summary of the article: Serious gastrointestinal complications such as bleeding and perforation can occur after a heart transplant. A 53-year-old heart transplant patient developed these complications due to stress ulcers. Intestinal obstruction subsequently developed, leading to malabsorption. Fecal microbiota transplantation (FMT) was used to restore gut function and gut microbiota diversity. FMT successfully supported the restoration of bowel function in the patient. A case report suggests that FMT may be a therapeutic option for complex gastrointestinal complications after heart transplantation.