Chest‐lead ST‐J amplitudes using arm electrodes as reference instead of the Wilson central terminal in smartphone ECG applications: Influence on ST‐elevation myocardial infarction criteria fulfillment

Abstract

By the use of CR or CL leads, smartphone 12-lead ECG results in slightly lower sensitivity in STEMI detection. Therefore, the adjustment of STEMI criteria may be needed before application in clinical practice.

Using the Apple Watch to Record Multiple-Lead Electrocardiograms in Detecting Myocardial Infarction: Where Are We Now?

“…For example, in one study that compared the CR/CL signals with the standard V leads, the sensitivity of CR/CL leads in detecting ST-segment elevation myocardial infarction (STEMI) was slightly lower. 22 Therefore, further study is needed to ascertain whether the Apple Watch ECG needs exclusive criteria to detect MI accurately.…”

Precordial electrocardiographic recording and QT measurement from a novel wearable ring device

“…Previous studies have examined the morphology and relation of bipolar chest recordings referenced to upper arm limb electrodes, 3 , 4 annotating these nonstandard precordial leads as CR/L1-CR/L6, as opposed to “unipolar” V1-V6 leads that are referenced to the WCT. Previous analysis has shown concordance of CR1-CR6 with traditional precordial leads V1-V6 for ST-segment analysis and QT measurement.…”