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Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Clinical Outcomes Research

Background:

  • Right ventricular infarction (RVI) is a recognized complication of inferior ST-elevation myocardial infarction (STEMI).
  • Understanding RVI outcomes in the current era of primary percutaneous coronary intervention (PCI) is crucial for patient management.
  • Contemporary data on RVI's impact on clinical endpoints is limited.

Purpose of the Study:

  • To evaluate the clinical outcomes of patients with STEMI complicated by RVI compared to those without RVI.
  • To assess in-hospital mortality and mid-term major adverse cardiac events (MACE) in these patient groups.
  • To determine the implications of RVI for contemporary STEMI management strategies.

Main Methods:

  • Retrospective analysis of 315 STEMI patients with the right coronary artery (RCA) as the infarct-related artery (IRA) from January 2010 to December 2016.
  • Patients were categorized into RVI (n=85) and non-RVI (n=230) groups.
  • Primary endpoint: in-hospital death. Secondary endpoint: MACE (cardiovascular death, heart failure re-hospitalization, non-fatal AMI). Kaplan-Meier curves and log-rank tests were used for survival analysis.

Main Results:

  • In-hospital mortality was significantly higher in the RVI group (9.4%) compared to the non-RVI group (3.0%) (P=0.018).
  • There was no significant difference in the incidence of major adverse cardiac events (MACE) between the RVI and non-RVI groups during the median follow-up of 358 days (P=0.537).
  • These findings suggest that while RVI impacts acute mortality, its effect on mid-term MACE may be mitigated.

Conclusions:

  • In-hospital outcomes were demonstrably worse for STEMI patients experiencing RVI.
  • Mid-term MACE rates were comparable between RVI and non-RVI groups, indicating potential for effective management.
  • Aggressive and timely treatment of STEMI, particularly in cases with RVI, is essential to improve acute outcomes and potentially equalize long-term prognoses.