TABLE 4.

Serum electrolyte concentrations at admission in the included dogs (n = 46) and cats (n = 34), in the subgroups of loop‐diuretic‐naïve dogs (n = 30) and cats (n = 24), and depending on the type of congestive heart failure

	Dogs		Furosemide‐naïve dogs		Dogs in left CHF		Dogs in right CHF		Cats		Furosemide‐naïve cats		Cats in left CHF		Cats in right CHF
Serum	(N = 46)		(N = 30)		(N = 41)		(N = 5)		(N = 34)		(N = 24)		(N = 31)		(N = 3)
electrolytes	Median	Range	Median	Range	Median	Range	Median	Range	Median	Range	Median	Range	Median	Range	Median	Range
Na (mmol/L)	153.5	134‐161	152	134‐161	153	134‐161	156	145‐158	157.5	148‐172	157	148‐172	157	148‐172	160	157‐162
K (mmol/L)	4.65	3.1‐6.0	4.7	3.1‐6.0	4.7	3.4‐6.0	4.5	3.1‐5.4	4.2	2.7‐4.8	4.4	3.1‐4.8	4.1	2.7‐4.8	4.6	4.3‐4.8
Cl (mmol/L)	113	97‐125	116	108‐125	112	97‐125	115	111‐121	117.5	96‐125	118	96‐125	117	96‐125	118	112‐123

Electrolyte classes	n	%	n	%	n	%	n	%	n	%	n	%	n	%	n	%
HypoNa	4	9%	1	3%	4	10%	0	0%	4	12%	3	13%	4	13%	0	0%
NormonNa	37	80%	26	87%	32	78%	5	100%	28	82%	19	79%	25	81%	3	100%
HyperNa	5	11%	3	10%	5	12%	0	0%	2	6%	2	8%	2	6%	0	0%
HypoK	4	9%	0	0%	3	7%	1	20%	7	21%	3	13%	7	23%	0	0%
NormoK	41	89%	29	97%	37	90%	4	80%	27	79%	21	87%	24	77%	3	100%
HyperK	1	2%	1	3%	1	3%	0	0%	0	0%	0	0%	0	0%	0	0%
HypoCl	9	20%	3	10%	9	22%	0	0%	10	29%	6	25%	9	29%	1	33%
NormoCl	36	78%	26	87%	31	76%	5	100%	24	71%	18	75%	22	71%	2	67%
HyperCl	1	2%	1	3%	1	2%	0	0%	0	0%	0	0%	0	0%	0	0%

Abbreviations: CHF, congestive heart failure; Cl, chloride; K, potassium; Na, sodium.