Not all heart murmurs in dogs indicate a serious problem. Some are completely harmless or benign. Credit: Braastad family photo So, your veterinarian tells you during a wellness exam that your dog has ...

S1 is the first heart sound that doctors can hear using a stethoscope. The vibrations that occur when the mitral and tricuspid valves in the heart close produce the S1 sound. There are two common ...

An S4 heart sound is a low-pitched sound that occurs toward the end of the diastole. In some cases, an underlying health condition, often one affecting the left ventricle, may cause the S4 heart sound ...