Intravascular Ultrasound-Guided Optimized Stent Deployment (MUSIC Study)

This is an early study from the dawn of coronary stenting, when a central worry was that stents would clot and required heavy anticoagulation. MUSIC tested whether intravascular ultrasound could make stenting safer.

By using IVUS to confirm that each stent was fully and optimally expanded against the vessel wall, the investigators were able to forgo systemic anticoagulation — and still achieved low rates of stent thrombosis (1.3 percent) and restenosis (under 10 percent) at six months. The principle it helped establish: a well-deployed stent, verified by imaging, is a safe stent.

This is observational, single-arm work from a formative era. Its conclusions were soon overtaken by the move to antiplatelet drugs and drug-eluting stents, but it played a real role in shaping early stenting practice and the case for imaging-guided deployment.

We rate the evidence moderate. The design is uncontrolled and the era predates modern stents, but the study was historically influential in demonstrating that optimal, IVUS-verified deployment improved the safety of a then-new technology.