VETERINARY MEDICINE: Heart Murmurs in Your Dog or Cat:.

VETERINARY MEDICINE: Heart Murmurs in Your Dog or Cat. A heart murmur is an abnormal sound that a veterinarian hears when listening to the pet’s heart through a stethoscope during a physical exam. Normally, your pet’s veterinarian hears two distinct normal heart sounds when they listen to the heart: lub-dub…lub-dub…lub-dub. When your vet hears an additional “whooshing” sound in between normal heart sounds, this is known as a heart murmur. If your pet is diagnosed with a heart murmur, there is no reason to panic. Some heart murmurs are benign or harmless and may go away on their own, particularly in puppies and kittens. The only way to know the extent of your pet’s condition is to work with your veterinarian and/or a veterinary cardiologist (a specialist) to determine the cause of the murmur and the severity of the heart disease. Additional diagnostic testing may be required. Causes of a Heart Murmur in pets. Anything that changes the blood flow through the heart can cause a murmur to be heard. Some of the common causes of heart murmurs in dogs and cats include:1) Heart valve deficiencies. 2) Defects in the heart walls. 3)Infection of the heart valves. 4)Hereditary cardiac defects. 5)Extra vessel connecting the great arteries (patent ductus arteriosus). 6)Defects in the heart muscle walls (ventricular septal defect). 7)Obstructive injury of the pulmonary valve (pulmonic stenosis). 8)Obstructive injury below the aortic valve (subaortic stenosis). 9)Defective mitral/tricuspid valve (mitral/tricuspid valve dysplasia). 10)Acquired cardiac diseases. 11)Thickening of the heart valves (myxomatous mitral/tricuspid valve degeneration). 12)Infection of the heart valves (infective endocarditis). 13)Weakening or thickening of the heart muscle (cardiomyopathies). 14)Dynamic obstruction of the right ventricle (a benign condition for cats). Signs of Cardiac Disease Not all dogs and cats diagnosed with a heart murmur will suffer from cardiac disease; alternatively, not all dogs and cats that suffer from cardiac disease will have a murmur. Signs of cardiac disease in dogs and cats can include: Difficulty breathing. Rapid shallow breathing. Cough. Abdominal (stomach) distention. Inability to exercise/weakness. Gray or blue gums. Possible collapse.