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Intracoronary nicorandil prior to reperfusion in acute myocardial infarction
Akiyoshi Miyazawa1, Yuji Ikari, Kengo Tanabe
1Division of Cardiology, Mitsui Memorial Hospital, Tokyo, Japan.
Insights
Direct nicorandil infusion before reperfusion improved heart function in ST-elevation myocardial infarction (STEMI) patients undergoing percutaneous coronary intervention (PCI). This treatment appears safe and beneficial for STEMI recovery.
Area of Science:
- Cardiology
- Pharmacology
Background:
- ST-elevation acute myocardial infarction (STEMI) requires timely reperfusion.
- Nicorandil, a potassium channel opener, is investigated for its role in myocardial protection.
Purpose of the Study:
- To evaluate the safety and efficacy of direct nicorandil infusion prior to reperfusion in STEMI patients.
- To assess the impact of nicorandil on myocardial perfusion and left ventricular function.
Main Methods:
- Prospective, randomized, single-center study.
- Seventy STEMI patients with TIMI 0-2 flow received direct percutaneous coronary intervention (PCI).
- Nicorandil (2 mg) was infused into the infarct area before reperfusion in the treatment group.
Main Results:
- Nicorandil infusion led to transient ST elevations in 94% of patients without adverse arrhythmias.
- Significantly higher TIMI myocardial perfusion grade 3 was observed in the nicorandil group (40% vs. 17%, p<0.01).
- Left ventricular regional wall motion score significantly improved in the nicorandil group (P < 0.05), particularly in patients without ischemic preconditioning.
Conclusions:
- Direct nicorandil infusion prior to revascularization appears safe and beneficial in STEMI.
- Nicorandil may improve myocardial perfusion and left ventricular function post-STEMI.
Background:
A prospective, randomised, single centre study was designed to test the safety and efficacy of nicorandil infusion, a potassium channel opener, prior to reperfusion in ST-elevation acute myocardial infarction (STEMI).
Methods And Results:
Seventy STEMI patients with TIMI 0 to 2 flow were randomly assigned to nicorandil (Group N; n = 35) or control (Group C; n = 35) and underwent direct percutaneous coronary intervention (PCI). In Group N, 2 mg of nicorandil was infused directly into the infarct area prior to reperfusion. Incidence of anterior infarction was 60% in both groups. With nicorandil infusion, additional ST elevations without chest pain were observed for a few minutes in 94% of cases. However, no ventricular fibrillation or ventricular tachycardia occurred. TIMI myocardial perfusion grade 3 was significantly higher in Group N (40% vs. 17%, p<0.01). Patients were followed for up to 8 months, with similar incidence of major clinical adverse events, however left ventricular regional wall motion score significantly improved in Group N (P < 0.05). The effect of nicorandil was seen in patients without ischaemic preconditioning (P < 0.05).
Conclusion:
This study suggests that direct infusion of nicorandil prior to revascularisation may be safe and beneficial.
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