Abstract Body (Do not enter title and authors here):
Introduction: The use of Transcatheter Aortic Valve Replacement(TAVR) has provided a safer alternative to open surgical approaches. The introduction of frailty scoring systems has proven effective in improving healthcare approaches and outcomes in various aspects of medicine. As there is a paucity of data on the impact of frailty among TAVR patients, we aim to conduct a retrospective study to investigate further.

Methods: Our study analyzed adult cases with a primary procedural code for TAVR among hospitalizations between 2016 and 2021 through the National Inpatient Sample(NIS). Frailty status was explored through the criteria of Gilbert’s frailty index. Multivariable regression models helped evaluate differences in short-term outcomes and complications between them.

Results: Our study involved 374200 cases of TAVR that were divided into LFR(285425 cases, 76.3%), IFR(86005 cases, 23.0%), and HFR(2770 cases, 0.7%). Compared to patients with LFR, patients with MFR and HFR showed higher odds of several complications, including cardiogenic shock(MFR: aOR 6.933, p<0.001, HFR: aOR 13.303, p<0.001), acute kidney injury(MFR: aOR 9.737, p<0.001, HFR: aOR 26.685, p<0.001 ), use of invasive mechanical ventilation(MFR: aOR 10.763, p<0.001,HFR: aOR 39.432, p<0.001), events of acute myocardial infarction(MFR: aOR 3.32, p<0.001, HFR: aOR 6.021, p<0.001), need for transfusion of blood products(MFR: aOR 3.027, p< 0.001, HFR: aOR 5.938,p<0.001), post-procedural bleeding(MFR: aOR 2.475, p<0.001, HFR: aOR 3.277, p<0.001), IABP use(MFR: aOR 4.942, p<0.001, HFR: aOR 9.703, p<0.001), and need for pericardiocentesis(MFR: aOR 3.804, p<0.001, HFR: aOR 4.217, p<0.001). Moreover, patients with MFR and HFR reported higher mortality risks than those with LFR(MFR: aOR 6.375, p<0.001, HFR: aOR 16.035, p<0.001 )(Table 1).

Conclusion:
Our study confirms the higher odds of various complications with increasing frailty status, including all-cause in-hospital death. A careful assessment of pre-operative frailty status along with close monitoring of pre-, peri-, and post-operative status will help improve the outcomes and provide care in a timely fashion.