Canine Cardiovascular Disorders and Dietary Impacts

Cardiovascular disease in dogs encompasses a spectrum of conditions ranging from genetic cardiomyopathies to nutritionally mediated myocardial dysfunction. Dilated cardiomyopathy (DCM) and chronic valvular diseases represent the most frequently encountered pathologies, often progressing to congestive heart failure (CHF) characterised by fluid retention and impaired organ perfusion. Dietary factors have garnered increasing attention following reports linking certain commercial diets—typically those that are grain-free or rich in pulses—to the development of DCM in breeds without known genetic predispositions. The interplay between dietary composition, micronutrient availability and myocardial metabolism is now recognised as a critical determinant of cardiac function. Taurine, an amino sulfonic acid involved in calcium homeostasis and membrane stabilisation, has emerged as a central focus. Deficiencies may arise from reduced dietary intake, altered absorption or increased excretion, leading to reversible myocardial dysfunction upon correction. Concurrently, advanced imaging modalities and biomarkers have enabled earlier detection of subclinical disease. Together, these developments underscore a holistic approach to prevention and management that integrates genetic risk assessment, nutritional optimisation and targeted therapeutic interventions.

Research from Nature Portfolio

Recent studies have employed targeted supplementation and metabolomic analysis to elucidate the dietary influences on canine cardiac health. One investigation evaluated the effect of taurine supplementation in dogs with stable CHF under standard pharmacotherapy. Supplementation led to a significant reduction in the aldosterone-to-angiotensin II ratio, indicating partial suppression of the renin–angiotensin–aldosterone system, and revealed notable heterogeneity in individual responses. Such findings suggest that taurine may modulate neurohormonal activation in heart failure beyond its role in correcting deficiency. Another study applied comprehensive foodomics profiling to diets associated with DCM. By comparing diets containing high levels of pulses or tubers with conventional formulations, researchers identified dozens of biochemical compounds enriched or depleted in the suspect diets. Amino acids, plant-derived xenobiotics and other metabolites were found to distinguish diet groups with absolute accuracy, pinpointing peas and lentils as primary contributors. This work provides a mechanistic framework for understanding how specific dietary ingredients may influence myocardial physiology and offers a blueprint for future ingredient screening.

Canine Cardiovascular Disorders and Dietary Impacts publication trend

The graph below shows the total number of articles in canine cardiovascular disorders and dietary impacts across all publications each year (not limited to Nature Index journals).

Technical terms

Dilated cardiomyopathy (DCM): A primary myocardial disorder characterised by ventricular chamber enlargement and systolic dysfunction in absence of abnormal loading conditions.

Congestive heart failure (CHF): A clinical syndrome resulting from the heart’s inability to maintain adequate circulation, leading to fluid accumulation.

Taurine: A semi-essential sulfonic acid crucial for calcium homeostasis, antioxidation and membrane stabilisation in cardiomyocytes.

Renin–angiotensin–aldosterone system (RAAS): A hormonal cascade regulating blood pressure and fluid balance, often activated in heart failure.

Echocardiography: A non-invasive imaging technique using ultrasound to assess cardiac structure and function.

Metabolomic profiling (Foodomics): Comprehensive analysis of small-molecule metabolites in a sample to characterise biochemical influences of diet.

References

1. The effect of taurine supplementation on the renin–angiotensin–aldosterone system of dogs with congestive heart failure. Scientific Reports (2023).
2. Development of plasma and whole blood taurine reference ranges and identification of dietary features associated with taurine deficiency and dilated cardiomyopathy in golden retrievers: A prospective, observational study. PLOS ONE (2020).
3. Effect of type of diet on blood and plasma taurine concentrations, cardiac biomarkers, and echocardiograms in 4 dog breeds. Journal of Veterinary Internal Medicine (2021).
4. Investigation of diets associated with dilated cardiomyopathy in dogs using foodomics analysis. Scientific Reports (2021).
5. Review of canine dilated cardiomyopathy in the wake of diet-associated concerns. Journal of Animal Science (2020).