Presley died from cardiac arrest caused by the latent bowel obstruction from her initial weight loss surgery, therefore the claim is true. A bowel obstruction is a complication from that kind of surgery, and can lead to cardiac arrest if symptoms of obstruction are ignored or unnoticed. The possible symptoms of a bowel obstruction complication are nausea, vomiting and abdominal cramps. While cardiac arrest from this surgery is unlikely, and Presley's death is an "outlier", it is still possible. A Health.com article about Presley's death explains the scenario, "'The two can be connected,' Schoen said. 'Let’s say there was a perforation [hole] of the small intestine, or a segment of the small intestine died from lack of blood flow. Then that person can get very sick, develop sepsis, and lead to cardiopulmonary arrest.'" (Landwehr 2023). A bowel obstruction is any case scenario where the gut is blocked and cannot properly function, luckily there is a less than 5% chance of this happening after a practiced weight loss surgery, they are considered safe by professionals. Tragically, Presley did not have the guarentee of statistics and her symptoms of complications went unheeded, resulting in cardiac arrest.
https://www.health.com/small-bowel-obstruction-cause-of-death-7562762#:~:text=The%20condition%20would%20have%20to,be%20connected%2C%E2%80%9D%20Schoen%20said.