Table 1. Results of initial laboratory tests.

Parameter	Lab result (reference range)
Hemoglobin	9.9 g/dl (13.2-16.6)
Platelet count	201,000 cells/mm3 (150,000-350,000)
White blood cell count	8900 cells/mm3 (4000-11000)
Red blood cell count	4.31 million cells/ul (4.20-5.65)
Blood urea nitrogen	59 mg/dl (13-21)
Serum creatinine	3.5 mg/dl (0.7-1.2)
Brain natriuretic peptide	2100 pg/ml (<450)
Erythrocyte sedimentation rate	25 mm/hr (0-22)