Mean ± SD, n (%), ICU = Intensive Care Unit, SpO2 = oxygen saturation, Hb = Hemoglobin, N/L ratio = Neutrophil/Lymphocyte ratio, GIT = Gastrointestinal tract, ESR = Erythrocyte sedimentation rate, eGFR = estimated glomerular filtration rate, CRP = C-reactive protein, NT-proBNP = N-terminal pro B-type natriuretic peptide, HF = Heart failure, CAD = Coronary artery disease, HCM = Hypertrophic cardiomyopathy. The gene discussed is GSTM1; the disease is hydrops fetalis.