Cat Cardiac Cachexia: Nutrition and Quality of Life

Cardiac cachexia is a serious complication of feline heart disease that requires specialised nutritional support.

Key Facts

Cachexia — involuntary muscle and fat loss — occurs in up to 30% of cats with advanced heart disease.
Hypertrophic cardiomyopathy (HCM) is the most common cause of cardiac cachexia in cats.
Cachexia differs from simple weight loss; it involves inflammatory cytokines that resist nutritional correction.
High-quality protein diets are important; sodium restriction is required only in cats with overt fluid retention.
Appetite stimulants such as mirtazapine may be used to maintain food intake.
Body weight and muscle condition score should be monitored monthly in cats with cardiac disease.

Welfare Considerations

Cardiac cachexia profoundly reduces quality of life: affected cats are weak, less playful, and often struggle to groom themselves. Nutritional support improves wellbeing even when the underlying cardiac disease cannot be cured. Owner education about monitoring body condition and recognising deterioration allows timely intervention and supports compassionate end-of-life decision-making.

What You Can Do

Monitor your cardiac cat's weight and muscle condition monthly using a simple scoring chart.
Discuss nutritional supplements and appetite management with your veterinary cardiologist.
Provide palatable, high-quality protein food; avoid unnecessary dietary restriction.
Plan for quality-of-life reassessment at regular intervals with your veterinary team.