Table 1.

Comparison between sodium and potassium disturbances observed in patients hospitalized for HF

Type of electrolyte abnormalities	Prevalence based on time of occurrence
	On admission	During hospitalization
Hyponatremia	19 %	22 %
Hypernatremia	<1 %	1 %
Hypokalemia	10 %	11 %
Hyperkalemia	7 %	4 %