# The Association of P2Y12 Inhibitor Pretreatment With Length of Stay Among Patients With Acute Coronary Syndrome Who Underwent Coronary Artery Bypass Graft Surgery: A Cohort Study

## TL;DR

This study finds that pretreatment with P2Y12 inhibitors in patients with heart issues who later need surgery leads to longer preoperative hospital stays but does not affect overall hospital costs or discharge outcomes.

## Contribution

The study identifies a specific impact of P2Y12 inhibitor pretreatment on preoperative length of stay in patients undergoing CABG surgery.

## Key findings

- P2Y12 inhibitor pretreatment was associated with longer preoperative length of stay.
- There was no significant difference in total length of stay, hospitalization cost, or discharge destination.
- The rate of pretreatment decreased significantly over the study period.

## Abstract

Introduction: Recent clinical practice guidelines do not recommend routine P2Y12 inhibitor pretreatment for patients with non-ST-elevation acute coronary syndromes (NSTE-ACS) treated with an early invasive strategy based upon clinical trial data suggesting no improvement in clinical outcomes and increased risk of bleeding. A subset of patients with NSTE-ACS who receive pretreatment and subsequently require coronary artery bypass graft (CABG) surgery may require lengthy P2Y12 inhibitor washout to reduce periprocedural bleeding risk, potentially prolonging hospitalization and increasing costs. We sought to study the association of P2Y12 inhibitor pretreatment on value-based outcomes including length of stay, cost, and discharge destination.

Methods: We conducted a retrospective cohort study of patients presenting with NSTE-ACS who underwent CABG at a tertiary academic medical center between 2019 and 2021. We assessed the frequency of P2Y12 inhibitor pretreatment over the study period and compared risk-adjusted length of stay, cost of hospitalization, and discharge destination among patients who did or did not receive pretreatment.

Results: One hundred eighty-eight patients met inclusion criteria, and 77% received pretreatment. The rate of pretreatment decreased significantly over the study period (p < 0.001). Pretreatment was associated with longer preoperative length of stay (4.2 ± 1.6 vs. 3.4 ± 2.5 days, p = 0.019), with no significant difference in postoperative or total length of stay. There was no difference in cost of hospitalization or likelihood of discharge to home following CABG.

Conclusion: Among patients presenting with NSTE-ACS who underwent inpatient CABG, P2Y12 inhibitor pretreatment was associated with longer preoperative length of stay, but no difference in total length of stay, cost of hospitalization, or discharge destination in this observational, single-center study.