BCAT2 and cardiac arrhythmia: Arrhythmia inducibility studies in Langendorff-perfused hearts showed an increased incidence of inducible arrhythmias in Bcat2p.Q300*/p.Q300* mice compared to Bcat2+/+ (50% vs. 11.1%, respectively), the majority of which were non-sustained (Figure 3G and H).