Accuracy of synthesized right-sided/posterior chest lead electrocardiograms

Right-sided precordial leads (V3R to V5R) and posterior chest leads (V7 to V9) provide important information for the right ventricle and posterior wall. These additional lead electrocardiograms (ECGs) improve diagnostic value in acute coronary syndrome patients [1]. However, these additional electrocardiograms are not routinely recorded due to the time-consuming procedure involved. Recently these synthesized six additional lead ECGs using the standard 12-lead ECG system (Nihonkoden Co. Ltd) have been developed [2],[3]. But the accuracy is not clear. The purpose of the present study was to evaluate the accuracy of synthesized ECGs at the ST part.