Elvis Presley died on August 16, 1977.  He was extremely ove…

Elvis Presley died on August 16, 1977.  He was extremely overweight when he died.  He had a history of ingesting fatty foods including fried peanut butter and banana sandwiches.  He also had a long list of prescription medications he was taking, some of which had cardiovascular or neurological effects.  He died on the toilet while trying to defecate.  The post-mortem exam on Elvis Presley revealed that his rectum and colon were severely impacted with fecal material, but the cause of death was listed as cardiac arrhythmia.  Which cranial nerve serves both the rectum and the heart?