Hypomagnesemia in brachycephalic dogs

Area of Science:

• Veterinary Medicine
• Canine Health
• Biochemistry

Background:

• Brachycephalic dogs, including Bulldogs, are prone to health conditions like arterial hypertension and obstructive sleep apnea.
• These conditions are frequently linked to chronic magnesium depletion in dogs.

Purpose of the Study:

• To compare the prevalence of hypomagnesemia (low magnesium levels) between Boxer and Bulldog breeds.
• To screen Bulldogs for hypomagnesemia and evaluate parenteral magnesium tolerance testing (PMgTT) for diagnosing whole-body magnesium deficiency.

Main Methods:

• Retrospective analysis of serum total magnesium (tMg) in Boxers and Bulldogs.
• Prospective study of healthy Bulldogs measuring ionized magnesium (iMg), tMg, and arterial blood pressure.
• Calculation of the iMg-to-tMg ratio and performance of PMgTT in a subset of Bulldogs.

Main Results:

• Bulldogs showed a significantly higher period prevalence of hypomagnesemia (15%) compared to Boxers (4.7%).
• The risk ratio for hypomagnesemia in Bulldogs was 1.8 times higher than in Boxers.
• Prospective data indicated potential utility for iMg:tMg ratio and PMgTT in assessing magnesium status.

Conclusions:

• Magnesium deficiency is common in Bulldogs and may contribute to breed-specific comorbidities.
• The iMg:tMg ratio and PMgTT show promise as diagnostic tools for chronic, subclinical magnesium deficiency in dogs.