RGS2 and Arrhythmia: Conversely, deletion of either Rgs2 or Rgs5 increases susceptibility to cardiac hypertrophy and arrhythmia in mice (Jean‐Baptiste et al., 2005; Jones et al., 2012; Li et al., 2010; Nunn et al., 2010; Qin et al., 2012, 2016; Song et al., 2021; Takimoto et al., 2009; Tuomi et al., 2010).