AUTHOR=Chang Shih-Sheng , Lu Chiung-Ray , Chen Ke-Wei , Kuo Zhe-Wei , Yu Shao-Hua , Lin Shih-Yi , Shi Hong-Mo , Yip Hei-Tung , Kao Chia-Hung 

TITLE=Prognosis Between ST-Elevation and Non-ST-elevation Myocardial Infarction in Older Adult Patients

JOURNAL=Frontiers in Cardiovascular Medicine

VOLUME=Volume 8 - 2021

YEAR=2022

URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2021.749072

DOI=10.3389/fcvm.2021.749072

ISSN=2297-055X

ABSTRACT=Background: Whether there is a difference in prognosis between elderly patients with ST-elevation myocardial infarction (STEMI) and non-ST-elevation myocardial infarction (NSTEMI) remains mysterious. 
Methods: We conducted a retrospective cohort study by analyzing the data in the Longitudinal Health Insurance Database in Taiwan to explore differences between STEMI and NSTEMI with respect to in-hospital and long-term (3-year) outcomes among older adult patients (aged ≥65 years). Patients were further stratified based on whether they received coronary revascularization. 
Results: In total, 5,902 patients aged ≥65 years with AMI who underwent revascularization (2,254) or medical therapy alone (3,648) were included. In the revascularized group, no difference was observed in cardiovascular (CV) and all-cause mortality during hospitalization or at 3-year follow-up between the two AMIs. Conversely, in the non-revascularized group, patients with NSTEMI had higher crude odds ratio (cOR) for all-cause death during hospitalization (cOR: 1.33, 95% confidence interval [CI] = 1.07 to 1.65) and at 3-year follow-up (cOR: 1.47, 95% CI = 1.21 to 1.91) relative to patients with STEMI. However, after multivariable adjustments, only NSTEMI indicated fewer in-hospital CV death (adjusted odds ratio: 0.75, 95% CI = 0.58 to 0.98) than STEMI in non-revascularized group. Moreover, major bleeding was not different between patients with STEMI or NSTEMI aged ≥65 years old.
Conclusion: Classification of AMI is not associated with the difference of in-hospital or 3-year CV and all-cause death in older adult patients received revascularization. In a 3-year follow-up period, STEMI was an independent predictor of a higher incidence of revascularization after the index event. NSTEMI had more incidence of MACE than patients with STEMI did in both treatment groups.