From: C-type natriuretic peptide concentrations in the plasma and cerebrospinal fluid of patients with subarachnoid hemorrhage
CNP level (pg/ml)
Day 1
Day 3
Day 7
Group A (positive for spasm)
15.8 ± 9.6
13.1 ± 5.6
11.5 ± 5.4
Group B (negative for spasm)
17.0 ± 5.7
13.7 ± 3.1
9.1 ± 2.7