The Effect of Exercise on the Excretion of Water by Patients with Congestive Failure

Abstract

Some patients with congestive cardiac failure maintain hyponatremia by the excretion of only small amounts of hypertonic urine. In the present study it is shown that following exercise the experimentally overhydrated patient with congestive cardiac failure excretes a very small amount of urine which may be hypertonic. This is in accord with the hypothesis that events which increase the severity of failure increase the tendency to the development of hyponatremia.