Calculation of intracellular cerebral [Mg2+] during hypoxic ischemia by in vivo 31P NMR
- 20 December 1996
- journal article
- research article
- Published by Wolters Kluwer Health in NeuroReport
- Vol. 8 (1) , 287-291
- https://doi.org/10.1097/00001756-199612200-00057
Abstract
SEVERAL algorithms for the calculation of ionized intracellular magnesium concentration from the chemical shifts of MgATP were compared, using in vivo 31P NMR data obtained from swine brain during and following hypoxic ischemia plus i.v. MgSO4 infusion. This analysis reveals that both the absolute ionized intracellular magnesium and relative changes in magnesium may vary widely between algorithms used. The calculated intracellular pH, used in algorithms to determine ionized magnesium concentration was found to be a critical parameter that governs the extent of these differences.Keywords
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