Field Implementation of Remote Ischemic Conditioning in ST-Segment-Elevation Myocardial Infarction: The FIRST Study

Area of Science:

• Cardiology
• Cardiovascular Medicine
• Interventional Cardiology

Background:

• Remote ischemic conditioning (RIC) is a noninvasive method to protect the heart from ischemia-reperfusion injury.
• RIC involves brief cycles of blood pressure cuff inflation and deflation.
• This study evaluated RIC's impact on major adverse cardiovascular events (MACE) in ST-segment-elevation myocardial infarction (STEMI) patients undergoing percutaneous coronary intervention (PCI).

Purpose of the Study:

• To compare MACE rates in STEMI patients receiving RIC before PCI versus standard care.
• To assess the efficacy of RIC as a pre-PCI therapy for STEMI.

Main Methods:

• A pre- and postimplementation study design was used.
• STEMI patients received either standard care or RIC (4 cycles) before PCI.
• Propensity score weighting was employed to adjust for baseline differences and estimate causal effects on MACE at 30, 90, and 180 days.

Main Results:

• A total of 1667 patients were analyzed (866 preimplementation, 801 postimplementation).
• No significant difference in 90-day MACE was observed between the RIC and standard care groups (11.8% vs 13.4%; OR 0.86).
• RIC significantly reduced 90-day MACE in patients presenting with cardiogenic shock or cardiac arrest (27.8% vs 42.7%; OR 0.52).

Conclusions:

• RIC before PCI for STEMI did not significantly reduce 90-day MACE overall.
• RIC demonstrated a potential benefit in reducing MACE for high-risk STEMI patients with cardiogenic shock or cardiac arrest.
• Further research is warranted to explore RIC's long-term effects and its specific role in managing high-risk STEMI populations.