Are detected due to the turbulent blood flow that occurs as blood backflows into the left atrium are detected if the valves cusps are thin and flexible All of the listed responses are true. This is also known as floppy valve syndrome. 2 Heart disease and cancer were two of the most common cuase deaths in 2006. . In older children and adults causes of abnormal heart murmurs include infections and conditions that damage the structures of the heart. During Diastole The Mitral Valve Normally. Mitral regurgitation MR is caused by the retrograde flow of blood from the left ventricle LV into the left atrium LA through the mitral valve MV causing a systolic murmur heard best at the apex of the heart with radiation to the left axilla. Uncommon causes of mitral stenosis are calcification of the mitral valve leaflets and congenital heart disease. Agata 33K If this is a true or. A heart murmur is the sound produced when blood flowing ...