Abstract only Background: The duration of the QRS carries valuable information regarding structural disease, conduction defects, or even ischemia. Studies have shown that a widened QRS (>120) is associated with poor cardiovascular outcomes. In this study we investigated the impact of the presence of a widened QRS (wQRS )previous to Transcatheter Aortic Valve Replacement (TAVR) and clinical outcomes. Methods:: Retrospective analysis of electronic medical records from 2018-2020 at the University of Illinois Chicago identified TAVR patients. Patients were placed into two groups: a wQRS and a nQRS group. Those with pacemakers prior to procedure were excluded. Primary outcomes included PPM placement prior to discharge, composite MACE (all-cause mortality, MI, or CVA), and (LOS) at 6 and 12 months. Results: We included 149 patients in this analysis. There were 76.1% male, 57.1% non-white, and 74 ± 13 years old on average. A wQRS was found in 46 (30.9%) and 103 (69.1%) were found to have a nQRS. Of this group, 40.2% had a history of congestive heart failure (CHF). The average ejection fraction (EF) was 50% with 80% of patients having a normal (EF). The CoreValve was placed in 65.7% of patient compared to 34.3% of patients having the Sapian valve placed. There were no differences in age, sex, or race between the two groups. Of all patient’s in the study, those with a wQRS were more likely to have a PPM placed prior to discharge compared to those with nQRS (17.4% (8) vs 5.8% (6) , p=0.025). Though not significant, 14% (13)of patients with the CoreValve placed required PPM prior to discharge compared to 2.5%(1) in the Sapian valve group (p=.175). There was no statistically significant difference in composite MACE, LOS, or significant bleeding events in either groups at 6 or 12 months. Conclusion: Our results suggest that patients with a wQRS are more likely to receive a PPM placement post TAVR during index hospitalization compared to those with a nQRS. This study suggests further investigation into the predictive nature of EKG parameters on clinical outcomes be done.