[The physiologic 3d heart sound in childhood. Determination in phonocardiography and assessment by auscultation].
The phonocardiographic characteristics of the IIIrd heart sound in children, accepted in the literature, are examined. In 231 out of 687 children with a normal heart, aged from hour 0 to 17 years, the IIIrd heart sound (HS) was phonocardiographically registered in the t and m1 frequency band. The findings on the frequency, sound frequency, sound duration, intervals II-III and T-III, and IIIrd HS amplitude related to the Ist and IInd HS amplitudes are compared with data in the literature. The audibility of the IIIrd HS increases with its low frequency equal or higher than 25 Hz, and its amplitude reaching or exceeding one-quarter of the preceding Ist HS and one-third of the preceding IInd HS.
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Leitpoliklinik West, Kreisstelle für Kardiologie, Halle/S., DDR.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003971:Diastole; D006326:Heart Auscultation; D006339:Heart Rate; D006347:Heart Sounds; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010701:Phonocardiography; D012016:Reference Values
Der physiologische III. Herzton im Kindesalter. Die Darstellbarkeit im Phonokardiogramm und Wahrnehmbarkeit bei der Auskultation.