S Wave Amplitude Single Beat

**Semantic type:** Quantitative Concept

**Definition:** An electrocardiographic measurement of the mean amplitude (usually measured in mV) of the S wave measured from the isoelectric baseline to the peak of the S wave of a single beat utilizing one or more leads. Based on the recording gain, this measurement may also be reported in mm. (CDISC)

**Synonyms:** - S Wave Amplitude, Single Beat - S Wave Amplitude, Single Beat - SWASB