Abstract 12391: Correlation of Admission Heart Rate With MACE Among ST-segment Elevation Myocardial Infarction Patients (killip1) Undergoing Primary Percutaneous Coronary Intervention

Introduction: Different admission heart rate (AHR) levels are frequently observed in ST-segment elevation myocardial infarction (STEMI) patients. However, it is not clear whether AHR is related to the occurrence of major adverse cardiovascular effects (MACE) after pPCI.

Hypothesis: We aim to explore the possible correlation between AHR and MACE after STEMI patients receive the primary percutaneous coronary intervention (pPCI).

Methods: The Chinese STEMI pPCI Registry was registered with ClinicalTrials.gov (NCT04996901). We analyzed 5586 patients with STEMI who underwent pPCI in a multi-center study in China, and patients were grouped according to the AHR greater or less than 70 bpm. Patients’ in-hospital MACE referred to new-onset heart failure and death. The association between AHR and in-hospital MACE was assessed in Logistic regression analysis.

Results: 4004 patients were enrolled ultimately, including 1105 patients with AHR< 70 bpm and 2899 patients with AHR≥ 70 bpm. After multivariate adjustment for age, gender, DBP, HR, smoking, hypertension, et al., the OR of MACE in patients with AHR ≥ 70 bpm was 1.573-1.581 times that of the other group in calibration Model I to IV. Subgroup analysis showed that it was also observed in the young (<60 years old) or the old (≥60 years old), male or female, Left anterior descending (LAD), and Right circumflex artery (RCA) patients (all P <0.05). We still found that AHR was a risk factor for in-hospital MACE after excluding those patients with a history of MACE, RCA occlusion and AHR less than 50 bpm or greater than 90 bpm in sensitivity analysis. ROC curve of AHR in predicting the occurrence of MACE after pPCI was 0.699. The cubic spline also confirmed that the risk of MACE decreased significantly with the reduction of AHR.

Conclusions: In STEMI patients undergoing pPCI, elevated AHR (≥70 bpm) identifies those at increased risk of in-hospital MACE. AHR less than 70 bpm may be a protective factor to avoid the occurrence of MACE.