[Serum ANP and ADH after subarachnoid hemorrhage and hyponatremia].
We determined serum atrial natriuretic peptide (ANP) and anti-diuretic hormone (ADH) on a time course basis in cases of subarachnoid hemorrhage and studied their influence on the development of hyponatremia. Twenty six cases of subarachnoid hemorrhage were admitted to our hospital in the past 1 year, and by the site of ruptured aneurysms, there were Acom 6 cases, ICA 6 cases, MCA 5 cases and VA BA 4 cases. Serum ANP and ADH levels were determined in the acute phase on Day 1-4, in the hyponatremia phase on Day 5-14 and in the chronic phase on Day 15 downward. Levels of not more than 130 mEq/l were regarded as hyponatremia. Cases showing other evident causes such as heart failure and renal insufficiency were excluded. In the normal control group (n = 20) which was admitted to this hospital for a close check-up, serum ANP was 26.5 +/- 11.6 pg/ml (10-50); levels of more than 50 pg/ml were regarded as being abnormally high. 1) Hyponatremia was observed in 7 cases (26-9%); the day of onset was 11.9 hospital day. The duration was 5.0 days and the minimum serum Na level was 126.4 mEq/l. 2) The serum ADH level was high regardless of whether or not there was the development of hyponatremia in the acute phase but tended to decrease gradually and became normal in the hyponatremia phase. 3) The serum ANP level in the cases of hyponatremia was 40.7 +/- 9.1 pg/ml in the acute phase, 69.0 +/- 25.7 pg/ml in the hyponatremia phase and 40.2 +/- 21.5 pg/ml in the chronic phase.(ABSTRACT TRUNCATED AT 250 WORDS)
Morinaga
K
K
Okawara neurosurgical hospital, Muroran, Japan.
Hayashi
S
S
Matsumoto
Y
Y
Omiya
N
N
Mikami
J
J
Ueda
M
M
Sato
H
H
Inoue
Y
Y
Okawara
S
S
D009320:Atrial Natriuretic Factor / Q000097:blood*; D006801:Humans; D007010:Hyponatremia / Q000209:etiology*; D013345:Subarachnoid Hemorrhage / Q000097:blood* / Q000601:surgery; D014667:Vasopressins / Q000097:blood*
D014667:Vasopressins; D009320:Atrial Natriuretic Factor