PubMed · 7212492
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E B Leahey. 1980. Digoxin-quinidine interaction: current status.. https://doi.org/10.7326/0003-4819-93-5-775
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We have reevaluated the feasibility of using direct immunochemical methods to track free digoxin in patients receiving Digibind. We report here that results obtained by the Stratus II and AxSYM immunoassays on patients receiving digoxin (without Digibind), digoxin-fortified serum samples supplemented with Digibind, and a digitoxic patient treated with Digibind, show no clinically significant biases. We conclude that useful free digoxin concentrations may be obtained for Digibind-treated patients using either the AxSYM or Stratus immunoassays without subjecting samples to ultrafiltration before analysis.
Digoxin in salvia and blood serum of 24 patients obtained Bemecor was determined by the method of FPIA (IMx-ABBOT). Mixed saliva was collected by three different types of Salivette (Sarstedt) given in order: normal Salivette with cotton wool swab, Slivette with polyester wool and Salivette with citric acid as a stimulator. It was found, that the correletio between the digoxin concentrations in saliva and serum and saliva/serum rations depended on the type of Salivette. The highest correlation was obtained with the Salivette with polyester wool (r = 0.892), but low concentrations of this drug in serum were good reflected in all samples of saliva, independent on kind of Salivette.
Hyperkalemia resulting from digoxin toxicity is a well-recognized phenomenon. We report a case in which hyperkalemia, bradycardia, and hypotension were unresponsive to standard therapy but appeared to respond to digoxin-specific antibodies (Fab). This case highlights the importance of a high index of suspicion for digoxin toxicity as a potential cause of refractory hyperkalemia.