Finally, In model 3, after age, ethnicity, gender, hypertension, CHF, diabetes, PVD, prior MI, atrial fibrillation, valvular disease, cardiogenic shock, cardiac arrest, HC, HR, SBP, DBP, MBP, norepinephrine, dopamine, epinephrine, WBC, PLT, RBC, Hb, BUN, Cr, glucose, serum potassium, sodium, bicarbonate, and total calcium were adjusted, higher magnesium levels continued to be a significant predictor of hospital mortality (OR, 1.63 vs. 1.39). This evidence concerns the gene GSTM1 and atrial fibrillation.