While article doesn't say the cause of death, the patient did suffer from congestive heart failure, as a prior condition. Further congestive heart failure can

While article doesn't say the cause of death, the patient did suffer from congestive heart failure, as a prior condition. Further congestive heart failure can cause all sorts of complications, meaning that the patient was pretty sick at baseline. According to the article, patient had an earlier human kidney transplant in 2018 that failed in 2023 leading to the congestive heart failure, and thus made patient a candidate for the xeno-kidney transplant. Patient was a pioneer- rest in peace.