DSP and ventricular tachycardia: Deficiency of the Dsp gene (Myh6-McmTam:DspF/F) was associated with a significant increase in the prevalence of ventricular arrhythmias, including premature ventricular contractions (PVCs) and runs of ventricular tachycardia (VT), whereas ventricular arrhythmias were absent in the WT and Myh6-McmTam mice [Figure 6I–L].