title: [Additional phonocardiographic symptom and the functional state of the heart during mitral valve prolapse in children].
abstract: A review of the clinical pattern and heart function in 50 children (aged 6 to 15 years) with mitral valve prolapse (MVP) demonstrated that MVP was mild or of medium severity and had a favourable course in most of the cases. Systolic extratone due to MVP can be manifested to the greatest degree within the low-frequency range of phonocardiograms. Morphometric and functional electrocardiographic parameters were within the normal range in most of the children. The transitory nature of MVP in some of the cases suggests a functional origin of the disease, with vegetovascular dystonia, temporary dysfunction of papillary muscles or reversible myocardial dystrophy as provoking factors.
mesh_terms: D000293:Adolescent; D002648:Child; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006337:Heart Murmurs; D006801:Humans; D008297:Male; D008945:Mitral Valve Prolapse / Q000175:diagnosis* / Q000503:physiopathology; D010701:Phonocardiography; D013318:Stroke Volume
vernacular_title: O dopolnitel'nom fonokardiograficheskom simptome i funktsional'nom sostoianii serdtsa pri prolapse mitral'nogo klapana u deteĭ.