Hypertrophic cardiomyopathy (HCM) is the most common heart disease in cats - diagnosis costs $400-$1,000, medications $30-$200/month. Many cats show no symptoms until advanced. HCM thickens the heart muscle, reducing its pumping ability. Some cats die suddenly without warning.
HCM accounts for most feline heart disease. The heart muscle thickens abnormally, making it harder to fill and pump blood. HCM has a strong genetic component in certain breeds. Other forms include dilated cardiomyopathy (DCM) and restrictive cardiomyopathy. Some cases are secondary to hyperthyroidism. HCM is the #1 cardiac disease in cats
Many cats show no symptoms until crisis. Signs include: rapid or labored breathing, open-mouth breathing, lethargy, loss of appetite, sudden hind leg paralysis (saddle thrombus - a blood clot blocking blood flow to the legs). Some cats collapse or die suddenly. Often completely asymptomatic until crisis
Echocardiogram (heart ultrasound) is the gold standard ($300-$600). Chest X-rays ($150-$250) show enlargement and fluid. Blood work including proBNP ($50-$100) screens for disease. ECG ($100-$200) detects arrhythmias. Average $400-$1,000
Medications manage symptoms but don't cure. Atenolol or diltiazem ($15-$50/month) slow heart rate. Furosemide ($10-$30/month) reduces fluid. Clopidogrel ($20-$50/month) prevents clots. Emergency care for heart failure or saddle thrombus: $1,500-$4,000. Average $30-$200/month
Diagnosis + monthly meds + monitoring echocardiograms. Emergency episodes add $1,500-$4,000 per crisis.
Maine Coons and Ragdolls have known genetic mutations for HCM. Persians and British Shorthairs also at elevated risk.
Some cats live years with mild HCM. Others develop heart failure or blood clots rapidly. Saddle thrombus carries a guarded prognosis.
Genetic testing available for Maine Coons and Ragdolls. Annual echocardiograms for at-risk breeds. Early detection improves outcomes.
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Diagnosis + monthly meds + monitoring echocardiograms.
Most comprehensive policies cover diagnosis, medications, and emergency care. Standard 14-day waiting period applies. Echocardiograms, X-rays, prescriptions, and hospitalization covered under illness benefits.
Any murmur noted before enrollment may disqualify future cardiac claims as pre-existing. Even a mild murmur from a routine exam can deny coverage. Enroll before any cardiac findings appear.
Monthly meds cost $360-$2,400/year. Most policies cover prescriptions but some cap chronic coverage. Emergency treatment ($1,500-$4,000) covered under illness. Emergency costs alone can justify premiums.
HCM in predisposed breeds (Maine Coons, Ragdolls) may be classified as hereditary. Some policies exclude it entirely; others cover it. If you own a predisposed breed, verify coverage before enrolling.
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