Correlation of serum chloride concentrations with components of the renin-angiotensin-aldosterone system in a dog with congestive heart failure.

A 7-year-old male castrated Cavalier King Charles Spaniel was hospitalized for 12 days for treatment of severe congestive heart failure secondary to myxomatous mitral valve disease. During that time, 6 serum samples from different days were analyzed for serum biochemical and renin-angiotensin-aldosterone system components. Serum chloride concentrations (ranging from 71.