Measurement of Total Body Exchangeable Potassium

Potassium and sodium distribution in cardiac failure.

1. Total body water, extracellular fluid, total exchangeable potassium and total exchangeable sodium were measured by the multiple isotope-dilution technique in eight patients with congestive cardiac failure. Measurements were made on each patient while in failure and then again after treatment and recovery. 2. Compared with five control subjects in whom the same measurements were made, patient...

Equations for the prediction of normal values for exchangeable sodium, exchangeable potassium, extracellular fluid volume, and total body water.

Despite the valuable research information on body electrolytes and water that is gained from isotope dilution studies, these investigations have not become routine clinical procedure. This is partly due to the fact that normal ranges for exchangeable sodium (NaE), exchangeable potassium (KE), extracellular fluid volume (E.C.F.V.), and total body water (T.B.W.) are wide owing to great individual...

Acute alterations of body composition after open intracardiac operations.

The body composition of patients with heart disease is acutely altered by surgical intervention. Interrelations and causes of the alterations have not been clear. Twenty patients were studied preoperatively and again 2 to 4 days after open intracardiac operations. In nine, measurements were made of the volumes of total body water, extracellular water, plasma, and red cells, and of the amounts o...

Regression of body compositional abnormalities of heart failure after intracardiac operations.

SUMMARY Alterations in body composition are present in patients with heart disease and conges-tive heart failure, and additional changes occur acutely after corrective surgery. The reversibility and time course of reversion to normal body composition have not been demonstrated. Nine patients were studied preoperatively and 2 to 4 weeks and 6 to 12 mo postoperatively. Measurements were made, usi...

Interrelations between total exchangeable sodium, potassium, body water, and serum sodium and potassium concentrations in hyponatremic and normonatremic heart disease.