Normokalemic Littmann sign due to STEMI
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Updated: Jan 17, 2026

Postconditioning with Lactate-enriched Blood for Cardioprotection in ST-segment Elevation Myocardial Infarction
Published on: May 28, 2019
János Tomcsányi1, Kristóf Tomcsányi1
1Department of Cardiology, Buda Hospital of the Hospitaller Order of St. John of God, Budapest, Hungary.
Abstract:
We present a patient case with anterior ST-elevation myocardial infarction (STEMI) with false double heart rate counting caused by computer error. Double counting heart rate typically indicates severe hyperkalemia (Littmann sign). However, this case highlights that Littmann sign may also be seen in acute ST-elevation MI (STEMI) due to peaked T-waves.
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