When somebody puts a lot of effort into a project and really gives a lot of themselves to it, we say that it took “blood, sweat, and tears.” We can’t speak for Russian artist Vtol’s sweat and tears, ...

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 ...

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 ...