The relationship between clinical and echocardiographic findings in mitral valve prolapse.

Incorporating prognostically related auscultatory, M-mode, 2DE and recent Doppler echocardiographic features, the following strict criteria for establishing the diagnosis of mitral valve prolapse (MVP) have been advanced: 1. auscultatory; mid-to-late systolic clicks and a late systolic murmur at the apex or mid-to-late systolic clicks at the apex which move appropriately with maneuvers that alter LV volume or late systolic murmur at the apex in young patients (coinciding that a similar murmur in elderly population is non-specific for MVP); 2. two-dimensionally "targeted" M-mode criterion: marked (greater than 3 mm) late systolic buckling posterior to C-D line (moderate 2 mm late systolic buckling or 3 mm holosystolic displacement "arouse suspicion" but do not establish MVP); 3. two-dimensional echocardiographic criteria: severe bowing of leaflet(s) on the parasternal long axis and four-chamber view (mild to moderate bowing alone are unacceptable) or left atrial coaptation point; 4. Doppler echocardiographic criteria: moderate or severe Doppler mitral regurgitation with any degree of leaflet bowing or mild Doppler mitral regurgitation with at least moderate bowing of one leaflet (mild leaflet bowing and mild mitral regurgitation can be regarded as "probable MVP"). The concept of mitral valve prolapse syndrome encompasses that which was earlier described in patients with a high prevalence of symptoms. In controlled studies, however, it has become apparent that cardiac and psychiatric symptoms can be found as frequently in normal subjects as in those with MVP. These results indicate that clinicians may have erroneously diagnosed patients with MVP because of premature acceptance that MVP is the cause of a distinctive syndrome.(ABSTRACT TRUNCATED AT 250 WORDS)