Ninety-day mortality of extremely elderly patients undergoing hip fracture surgery and its association with preoperative cardiac function: a single-center retrospective study.

The 90-day mortality rate in patients over 80 years old after hip fracture surgery was 7.5%. There were no significant differences in preoperative cardiac function assessed by echocardiography between the mortality and non-mortality groups. Our results suggest that there is no association or only a weak association of high BNP level with 90-day mortality in this age population.