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About Mitral Valve Prolapse & Regurgitation. A heart murmur that is most pronounced when the stethoscope is positioned at the heart's apex and occurs in the late systolic phase may be caused by mitral valve prolapse. This is also known as floppy valve syndrome. The murmur is normally preceded by a series of clicks.
Choose a stethoscope with two end pieces, a bell and a diaphragm. The bell is a shallow concave structure used to hear low pitched sounds such as extra heart sounds or murmurs. The diaphragm has a membrane across its structure resembling a drum and is used to hear high pitched sounds such as normal heart sounds.