Forward and back aspiration during ST-elevation myocardial infarction: a feasibility study

Area of Science:

• Interventional Cardiology
• Vascular Surgery
• Biomedical Engineering

Background:

• Optimizing stent expansion while preventing distal embolisation in ST-elevation myocardial infarction (STEMI) is a significant clinical challenge.
• Current aspiration thrombectomy techniques may not fully address thrombus burden or embolic risk.
• This necessitates novel angiographic strategies to improve procedural outcomes.

Purpose of the Study:

• To describe a novel "forward" and "back" aspiration technique for enhanced thrombus removal.
• To demonstrate the prevention of distal embolisation during percutaneous coronary intervention (PCI).
• To facilitate high-pressure post-dilatation of implanted stents in STEMI patients.

Main Methods:

• A "forward" aspiration was performed using a conventional thrombectomy catheter.
• A "bail-out" strategy utilized a larger bore guide catheter extension system (GuideLiner) for persistent thrombus.
• A "back" aspiration was employed with a deeply intubated GuideLiner or guide catheter to protect against emboli during balloon deflation and stent post-dilatation.

Main Results:

• The technique was applied to 30 consecutive STEMI cases over six months.
• Bail-out GuideLiner-assisted aspiration was needed in 9 cases for inadequate thrombus removal.
• High-pressure stent post-dilatation was achieved in 27 cases without compromising blood flow or myocardial perfusion.

Conclusions:

• The combined "forward" and "back" aspiration strategy is safe and effective for STEMI intervention.
• This technique allows for complete stent expansion and high-pressure post-dilatation.
• Randomized controlled trials are warranted to validate the safety and efficacy of this novel approach.