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Background
“Smartphone 12‐lead ECG” for the assessment of acute myocardial ischemia has recently been introduced. In the smartphone 12‐lead ECG either the right or the left arm can be used as reference for the chest electrodes instead of the Wilson central terminal. These leads are labeled “CR leads” or “CL leads.” We aimed to compare chest‐lead ST‐J amplitudes, using either CR or CL leads, to those...
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