Cardiac Evaluation in Dogs and Cats: When to Refer?

Introduction

The health of our pets is a priority, and veterinary cardiology plays a crucial role in keeping them well. A veterinary cardiac evaluation is an essential tool for identifying and treating heart problems in dogs and cats, helping them live longer, healthier lives.

But when exactly should we consider a cardiac evaluation for our four-legged companions?

This article explores why cardiac evaluation matters, the key signs that point to the need for it, and the procedures most commonly involved.

Why does a cardiac evaluation matter for pets?

A veterinary cardiac evaluation is a thorough process that combines a series of exams and tests designed to assess heart health in dogs and cats. Heart problems in pets range from congenital conditions to diseases acquired over a lifetime, and many of them are silent in the early stages.

Early detection of heart disease is critical: it allows for proper management and can significantly improve a pet's quality of life and longevity.

Heart problems can dramatically affect a pet's well-being, reducing exercise tolerance, compromising breathing and even triggering emergencies such as heart failure. That is why regular cardiac evaluations are essential, especially in animals with risk factors or signs that suggest a cardiac problem. A cardiac evaluation also lets the veterinarian track how the disease progresses and adjust treatment as needed, ensuring the best possible care.

Main indications for a cardiac evaluation

There are several situations in which a cardiac evaluation is recommended for dogs and cats. Knowing these indications helps owners recognize the right moment to consult a veterinary cardiologist.

1. Clinical signs: certain clinical signs may indicate that a pet is dealing with a cardiac problem. A persistent cough, difficulty breathing, exercise intolerance, fainting or sudden weakness all warrant a cardiac evaluation. These signs can be subtle and are easily mistaken for other conditions, but it is always better to err on the side of caution.

2. History of heart disease: pets with a known history of cardiac problems, or with close relatives affected by heart disease, should be monitored closely. The same applies to animals that have had infections or conditions capable of affecting the heart, such as heartworm disease (dirofilariasis).

3. Age and predisposed breeds: some dog and cat breeds carry a genetic predisposition to heart disease. Dog breeds such as the Cavalier King Charles Spaniel and the Doberman Pinscher, and cat breeds such as the Maine Coon and the Ragdoll, are known to have a higher incidence of cardiac problems. Older pets are also at greater risk of developing heart disease, which makes regular evaluations even more important as they age.

4. Pre-anesthesia or planned surgery: before any surgical procedure or anesthesia, a cardiac evaluation may be recommended to confirm that the patient is fit to undergo the procedure. Undetected heart problems can significantly increase the risk of complications during surgery.

5. Assessment of heart sounds: murmurs or arrhythmias detected during a routine physical exam may point to underlying cardiac problems that call for a more in-depth evaluation.

Procedures involved in a cardiac evaluation

A veterinary cardiac evaluation involves a series of procedures that help diagnose and monitor heart disease in pets. Each of them provides valuable information about the patient's cardiac health.

1. Physical exam and clinical history: the evaluation begins with a complete review of the pet's clinical history and a careful physical exam. The veterinarian listens to the heart and lungs with a stethoscope to detect murmurs, abnormal sounds or irregular rhythms.

2. Chest radiographs: chest X-rays are essential for assessing the size and shape of the heart and for checking for fluid in the lungs or around the heart. These images help identify signs of congestive heart failure and other conditions that may affect cardiac health.

3. Laboratory tests: blood and urine tests provide insight into the pet's overall health and can reveal conditions that affect the heart, such as infections or hormonal disorders. In some cases, specific tests such as cardiac biomarker levels (for example, natriuretic peptides) are performed to assess heart function.

4. Electrocardiogram (ECG): the ECG is a key test for assessing cardiac rhythm and rate. It records the electrical activity of the heart and is used to identify arrhythmias, which are abnormalities in the heartbeat. In pets, the ECG is especially important for monitoring the response to treatment of heart disease and for detecting problems that are not evident on a physical exam or radiograph.

5. Echocardiogram: this is an ultrasound study of the heart that allows real-time visualization of its internal structures. It is a crucial tool for assessing cardiac function, detecting valve disease and measuring how forcefully the heart pumps blood.

6. Blood pressure: measuring blood pressure helps detect hypertension, which is common in pets with heart disease and can complicate treatment.

Conclusion

A veterinary cardiac evaluation is an essential part of caring for dogs and cats, especially for those that show signs, belong to predisposed breeds or carry known risk factors.

The procedures involved, from the physical exam to the ECG, are vital for diagnosing and monitoring heart disease, enabling effective treatment and improving a pet's quality of life.

As owners, it is our responsibility to stay alert to warning signs and make sure our four-legged companions receive the best possible care so they can live long, healthy lives. At the first worrisome sign or symptom, seek professional veterinary attention.