10/27/2025
Heart murmurs in are usually detected during a routine physical examination by your veterinarian. Using a stethoscope, your vet listens to your pet's heart, carefully noting any irregularities in its rhythm or sounds. If a murmur is identified, further diagnostic tests, such as chest X-rays, echocardiograms, or bloodwork, may be recommended to determine its cause and severity.
While some heart murmurs are "innocent" and cause no symptoms, others may indicate an underlying heart condition. Symptoms to watch for include:
Lethargy: Reduced energy levels or reluctance to exercise.
Coughing: Persistent or worsening coughing, especially at night or after physical activity.
Difficulty Breathing: Labored breathing, rapid breathing, or shortness of breath.
Poor Appetite or Weight Loss: A decline in eating habits or noticeable weight loss.
Fainting or Collapse: Episodes of fainting, particularly during physical activity.
Swollen Abdomen: Fluid buildup in the abdomen, known as ascites, in advanced cases.
Recognizing these symptoms early can significantly improve outcomes for pets with heart murmurs. Always consult your if you notice any changes in your pet’s behavior or health.
Read our full guide on heart murmurs here
In this article, we’ll walk you through everything you need to know about heart murmurs in pets, so you can feel informed and confident caring for your pets.