"Lub" is caused by the closure of mitral and tricuspid valves at the start of systole. "Dub" is caused by the closure of aortic and pulmonic valves, marking the end of systole. Korotoff sounds are sounds that are listened for while checking your blood pressure. "Lub" "Dub" sounds are due to vibrations inside the ventricles that are connected with the closing of the valves. The diagnostic value of auscultating the heart is an examination of the heart, the doctors use a stethoscope to listen to the sounds inside your body. For the heart doctors listen for what the heart sounds like, how loud the sound is, and how often each sound occurs (Nall, 2015). Information you can receive from listening to your heart is troubled sounds such as a skipped
