Outcomes from Quantitative Flow Ratio-Guided Complete Revascularization and Angiography-Guided Percutaneous Coronary...

Area of Science:

• Cardiology
• Interventional Cardiology
• Medical Imaging

Background:

• Quantitative flow ratio (QFR) is a non-invasive tool for assessing coronary artery stenosis.
• It offers functional assessment without requiring pressure wires or hyperemia.
• This study evaluates QFR's role in managing non-culprit lesions after ST-elevation myocardial infarction (STEMI).

Purpose of the Study:

• To compare procedural and inpatient outcomes of QFR-guided versus angiography-guided percutaneous coronary intervention (PCI).
• To assess the efficacy of QFR in staged revascularization of non-culprit lesions in STEMI patients.

Main Methods:

• A randomized prospective single-center study involving 124 STEMI patients with significant non-culprit stenosis.
• Participants were randomized to either QFR-guided PCI (n=62) or angiography-guided PCI (n=62).
• Key procedural metrics and inpatient outcomes were compared between the two groups.

Main Results:

• QFR-guided PCI demonstrated significant reductions in fluoroscopy time (6.2 vs 8.0 min) and contrast volume (100 vs 120 mL).
• The QFR group also showed fewer stents implanted (1.5 vs 2.0) and shorter total stent length (28 vs 45 mm).
• No significant differences were observed in periprocedural complications or length of hospital stay.

Conclusions:

• QFR-guided PCI for non-culprit lesions in STEMI patients enhances procedural efficiency.
• It leads to reduced fluoroscopy time, contrast usage, and stent implantation.
• QFR shows potential for optimizing PCI strategies without compromising patient safety or outcomes.