A new technology has been found that can identify blockages in the heart a study has revealed. Doctors evaluating patients for blockages in the heart are aided by having a good roadmap of the vascular terrain before they can insert stents to clear the impasse. Presented by Duke cardiologists the study shows that the newer method carries a much lower cost potentially saving each patient at least U$800. In a study of nearly 2500 heart patients researchers found that a new technology non-invasive instantaneous wave-free ratio (iFR) was less expensive than an older technology known as fractional flow reserve (FFR)