Table 1.

Laboratory data.

Variable	Reference range	On admission	3 days after admission	1 week after admission
Urea nitrogen (mg/dL)	8–20	32	17
Creatinine (mg/dL)	0.45–0.81	1.60	1.04
eGFR (mL/min/1.73 m2)	≥60	33.5	53.6
Brain natriuretic peptide (pg/mL)	≤18.4	681.1	410.6
Serum digoxin (ng/mL)	0.8–2.0	7.30	2.69	1.50

eGFR – estimated glomerular filtration rate.