HESI Myocyte Subteam dataset with stem cell-derived cardiomyocytes (PSC-CMs) to evaluate use in an in vitro proarrhythmia model. Data includes electrophysiologic responses to 28 drugs linked to low, intermediate, and high torsades de pointes (TdP) risk categories using multiple cell lines and standardized protocols in a blinded, international multisite study using multielectrode array or voltage-sensing optical approaches.