It's important that you and your dog pay regular visits to the Vet. This gives the Vet the greatest possible chance for early detection and treatment of heart disease. It also allows the Vet to monitor your dog's treatment on an ongoing basis.
Your Vet will pick up clues to any heart-related problems with a thorough physical examination of your dog. By listening to your dog's heart with a stethoscope, your Vet can assess heart rate and rhythm, and detect a murmur if one is present.
Your Vet might also recommend radiographs (or X-rays) or an ultrasound for your dog. These tests will help them detect fluid on the lungs, or an increase in heart size.
Another type of test your Vet may use is an electrocardiogram (ECG) to record the electrical activity of the heart. This is a useful tool, particularly if there are problems with the rhythm of your dog's heartbeat.