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The best cost-effective non-invasive test for the diagnosis of coronary artery disease (CAD) in patients with intermediate pre-test probability (PTP) is unknown. Nevertheless one of the most common non invasive test used is the exercise treadmill testing (ETT) that is the less expensive non-invasive test but with the lowest sensitivity for the diagnosis of CAD, therefore many patients with intermediate PTP will required another non-invasive test with a higher cost and some of them require exposure to radiation. Despite all these measures, an estimated $108.9 billion is spent annually on CAD treatment. Some studies had showed that diastolic dysfunction is associated to CAD. A novel signal-processed surface ECG (MyoVista hsECG) can detection the abnormal myocardial relaxation and therefore identified CAD. The non-invasive acoustic device CADScore V3 algorithm had lower cost compared with any noninvasive test, with a high negative predictive value but not good enough specificity to diagnose CAD, hence should be the first approach in patients with a low and intermediate probability of CAD, and if to this evaluation will added the Myovista hs ECG to detection of CAD, therefore some patients with intermediate PTP could be reclassified into high risk and a better cost-effective decisions could be taken as referring directly to coronary angiography.

Letter by Garcia A, et al. regarding article: Coronary artery disease risk reclassification by a new acoustic-based score