Testing a new heart pressure measurement to guide stent placement

This trial is studying a new way to measure blood pressure inside your heart arteries to decide whether you need a stent (a small tube placed to keep arteries open). Instead of using medication to stress your heart during the measurement, this new method called Resting Full-cycle Ratio (RFR) takes the measurement while you're at rest. Researchers want to understand how patients do over time when stents are placed using this simpler, more comfortable approach.

Currently, doctors use a stress-inducing medication called adenosine to measure how much a narrowed artery is blocking blood flow — but this medication causes discomfort and takes time. This trial exists to see if the new resting measurement method works just as well, making the procedure faster and more comfortable for patients while still helping doctors decide who truly needs a stent.