The S3 heart sound occurs as the mitral valve opens and allows blood to fill the left ventricle passively. The sound happens as a result of blood striking the left ventricle during early diastole. An ...

Add Yahoo as a preferred source to see more of our stories on Google. The human body makes strange noises when something’s amiss. A growling tummy can mean you're low on food. Wheezing from the chest ...

This sound is typically heard when you bend or straighten your knee, or when climbing up or down the stairs. It may manifest ...