Figure 4.

SK2 proteins in HF and non‐HF (NF) ventricles. A, Left, Western blot analysis of atrial and ventricular tissues from a 57‐year‐old male patient with paroxysmal atrial fibrillation and normal LVEF. Right, Western blot analysis of SK2 and glyceraldehyde‐3‐phosphate‐dehydrogenase (GAPDH) in non‐HF (n=5) and HF (n=6) human ventricles. B, Aggregated results of SK2 protein (66 kDa) and presumed SK2 short form protein (31 kDa) expression in non‐HF and HF groups. The signal intensity was normalized to the GAPDH. Data are presented as median [25th percentile; 75th percentile]. HF indicates heart failure; LVEF, left ventricular ejection fraction.