Intermediate Lesions Need Better Guidance
Cardiologists face uncertainty with 40-70% coronary stenoses daily. Angiography alone misses physiology and plaque details. Instantaneous wave-free ratio (iFR) measures pressure drops across lesions. Intravascular ultrasound (IVUS) shows vessel and plaque anatomy. This study published in the International Journal of Cardiology Research compares both head-to-head in real practice. 
Small Prospective Trial Tests Both
Researchers enrolled 50 patients with intermediate stenosis needing stent consideration. Target vessels measured at least 2.5 mm in proximal to mid segments. Group I got iFR guidance. Group II received IVUS guidance. Everyone qualified for either test. Follow-up covered hospital stay, 30 days, and 6 months for MACE including death, non-fatal MI, or target lesion revascularization.
Baseline Groups Match Closely
Left ventricular ejection fraction showed no differences between groups. Angiographic findings appeared similar. Laboratory values stayed balanced. Procedural details including contrast use matched across both arms.
Outcomes Equal at Six Months
No MACE differences emerged at hospital discharge, 30 days, or 6 months. Primary and secondary endpoints stayed identical. Stent deployment success rates equaled. Both methods guided optimal PCI safely.
Radiation Favors iFR Approach
IVUS group absorbed higher radiation doses with p=0.019 statistical difference. iFR avoided extra imaging fluoroscopy time. Patient safety improved without losing guidance quality.
Choose Based on Lesion Questions
Use iFR first for hemodynamic doubt in intermediate lesions. Turn to IVUS for plaque burden or landing zone concerns. Both beat angiography alone for decision-making.
Hybrid Cath Lab Strategy Wins
Train fellows in both tools for complete assessment. iFR cuts radiation exposure in young patients. IVUS remains gold standard for complex anatomy.
Practice Ready for Either
Six-month data supports confidence in both approaches. Patient outcomes drive tool selection over tradition.