Bengal Cat HCM Screening — Complete Guide to Timing, Frequency, and Costs

HeartBreed HealthMeongsiljang Veterinary Advisory Board

We’ve put together an age-specific screening schedule and list of tests to help catch hypertrophic cardiomyopathy (HCM) early in Bengal cats. Regular check-ups are key, even during the asymptomatic phase.

What is Bengal HCM? Why Regular Screening is Necessary

A Bengal cat having its heart auscultated by a veterinarian

Bengal cats are prone to hypertrophic cardiomyopathy (HCM), a heart muscle disease characterized by thickening of the ventricular walls. Veterinary internal medicine textbooks describe HCM as the most common cardiomyopathy in cats. Because a familial (hereditary) form exists, cats with affected family members require especially vigilant monitoring. The cornerstone of screening is regular cardiac echocardiography, starting even during the asymptomatic phase. Since HCM often shows few early signs but can progress to dyspnea, hindlimb paralysis from thromboembolism, or sudden death, at-risk breeds or cats with a family history are typically advised to undergo routine cardiac echocardiograms beginning around 12 months of age and continuing throughout their lives.

Why Bengals are Susceptible to HCM

Bengals are often mentioned as one of the cat breeds for which HCM screening is recommended. According to veterinary internal medicine textbooks, HCM is the most common myocardial disease in cats, and familial (hereditary) occurrence has been reported in several breeds, including Maine Coons, Norwegian Forest Cats, Siberians, British Shorthairs, Ragdolls, Sphynx, and Devon Rex, leading to the recommendation of cardiac ultrasound screening programs. However, since specific incidence rates for Bengals are not clearly identified in the textbooks, it is safer to determine the need for screening based on individual risk factors such as family history.

Genetic Predisposition: HCM has a familial (hereditary) form, so if there are affected individuals in the family, such as parents, the risk of developing the disease should be assessed more carefully.

Asymptomatic Progression: Even as the heart muscle thickens, the cat may appear active and healthy on the outside.

Potential for Early Onset: As textbooks recommend regular screenings starting from 1 to 3 years of age, cases have been diagnosed at relatively young ages.

Risk of Sudden Death: HCM has been reported to cause sudden death in young individuals, even in humans, and there are reports of sudden death being the first symptom in cats as well.

Age-Specific Recommended Screening Schedule

The key to HCM screening in Bengals is to start in the asymptomatic stage. It’s not enough to have a single test when your cat is young; regular follow-up screenings throughout their life are essential. The table below outlines the generally recommended screening schedule. Depending on individual risk factors—such as parental medical history or the presence of heart murmurs—your veterinarian may recommend more frequent intervals.

A calendar symbolizing regular check-up schedules and a stethoscope

Recommended Screening Frequency for Bengal HCM

Item	Low-risk group	High-risk group (with family history)
12 months (first checkup)	One echocardiogram	One echocardiogram
1–3 yrs	Once a year	Once every 6 months–1 year
4–6 yrs	Once a year	Once every 6 months
7+ yrs	Once every 6 months–1 year	Once every 6 months
If murmur or cardiac abnormality is found	Follow-up every 3–6 months	Follow-up every 3 months

The final schedule is decided by the attending veterinarian based on the individual's condition

Signs That Warrant Earlier Screening

If you notice any of the following signs, seek an immediate cardiac evaluation regardless of your regular check-up schedule. HCM can progress rapidly, and missing the critical window for intervention may lead to an emergency. • Breathing faster than usual or panting with an open mouth • Unusually slow recovery after exercise • Sudden weakness or coldness in the hind legs (possible blood clot) • Loss of appetite accompanied by lethargy • A new heart murmur or gallop rhythm detected during auscultation

What Tests Are Included in the Screening?

The gold standard for screening Bengal cats for hypertrophic cardiomyopathy (HCM) is an echocardiogram. Relying on auscultation alone can miss asymptomatic HCM, so imaging is essential for an accurate diagnosis. Echocardiogram (Echo): The key test that directly measures heart wall thickness. Thoracic X-ray: Assesses heart size and checks for pulmonary edema. Blood Pressure Measurement: Necessary to rule out hypertensive cardiomegaly. NT-proBNP Blood Test: Used as a supportive marker (not sufficient for standalone diagnosis). Electrocardiogram (ECG): Checks for the presence of arrhythmias.

A Bengal cat undergoing an echocardiogram.

Should You Get Genetic Testing?

In addition to the drug-sensitivity gene often discussed in Bengal cats, genetic testing for hypertrophic cardiomyopathy (HCM)-related mutations is also available for some breeds. However, according to veterinary internal medicine textbooks, while specific mutations have been clearly validated in Maine Coons (MYBPC3) and Ragdolls (R820W), research on Bengal-specific mutations remains insufficient. In other words, a negative genetic test result does not guarantee that a cat will not develop HCM. Therefore, genetic testing should be used as a supplementary reference, and regular cardiac ultrasound screenings must never be skipped.

What to Know If Diagnosed with HCM

HCM is not a curable condition, but early detection can significantly extend your pet’s average lifespan. According to veterinary internal medicine textbooks, the median survival time from the point of diagnosis is approximately five years. In asymptomatic cases, your veterinarian will determine the appropriate medication and follow-up schedule based on your pet’s weight and cardiac status. It is crucial that you do not discontinue medication or delay check-ups without consulting your vet.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

At exactly what age in months should a Bengal cat have its first HCM screening?

We generally recommend around 12 months of age. However, for high-risk cats whose parents have a history of HCM, the first screening may begin as early as 6 to 9 months. When adopting, be sure to ask the breeder for the parents' screening records.

If no heart murmur is audible, does that mean I can skip the check-up?

No, that’s not the case. A significant number of cats with hypertrophic cardiomyopathy (HCM) progress without any heart murmurs. Auscultation is only an auxiliary tool; to detect asymptomatic HCM, an echocardiogram is essential.

I’m worried about the cost of check-ups. Do I really need to do them every year?

For cats at high risk or with a family history of heart disease, an annual cardiac echocardiogram is the standard of care. If the cost is a concern, ask your veterinary clinic about routine check-up packages. However, according to veterinary internal medicine textbooks, there are currently no medications proven to slow the progression or reverse hypertrophy in asymptomatic hypertrophic cardiomyopathy (HCM). Still, early detection through regular check-ups allows for earlier preparation for complications such as congestive heart failure or thromboembolism, helping to prevent emergencies.

Is it okay to only get a genetic test and skip the echocardiogram?

No, that’s not quite right. The HCM gene mutations identified in Bengals are limited, so even a negative genetic test doesn’t rule out the possibility of developing HCM. Genetic testing should be used as a reference tool, while echocardiography remains the key diagnostic method.

Is it possible to perform an echocardiogram without anesthesia?

In most cases, the procedure is performed without anesthesia, with the owner present for comfort. The examination typically takes only 15 to 30 minutes. However, highly sensitive or aggressive animals may require mild sedation.

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References

[1] Little SE, The Cat: Clinical Medicine and Management, 2nd Edition, Elsevier, 2024

[2] Silverstein DC, Hopper K, Small Animal Critical Care Medicine, 3rd Edition, Elsevier, 2023

[3] Luis Fuentes V et al., ACVIM consensus statement guidelines for the classification, diagnosis, and management of cardiomyopathies in cats, Journal of Veterinary Internal Medicine, 2020