On the other hand, we did not see significant differences in the surface ECG intervals, sinus node recovery times or arrhythmia induction between the two groups, although QRS-duration was approaching significance for being wider in cardiomyocyte-specific CAP2-null mice (Supplementary Table S5) and became significant if the data from males and females were pooled. The gene discussed is CAP2; the disease is Arrhythmia.