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 ...

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 ...

Take a deep breath in, then listen as you exhale. Does it make a whistling or rattling sound? No, this isn't ujjayi breathing that calms your mind. A wheezing cough is caused by something along your ...