Role of serum digoxin assay in patient management.

Serum digoxin assay is a useful clinical tool in monitoring the administration of digoxin. Its value, however, is generally overrated; judicious use of it applies only to specific clinical problems. Its primary use involves assay values at the two ends of the scale: low ranges may help detect noncompliant patients or those with serious absorption difficulties. Higher ranges are helpful in the clinical recognition of digitalis toxicity.