Aigner A
Wien Klin Wochenschr Suppl. 1976;51:1-19.
The normal heart sounds, murmurs, opening and closing sounds of aortic and mitral valve prostheses were recorded on a tape in order to obtain the highest frequencies which were recordable on the chest wall. Sections of these tapes were analyzed in terms of contour sonagrams. For this purpose six groups were formed and investigated: group I comprised persons without cardiovascular diseases, group II patients with mitral valve failure, group III patients with aortic valve failure, group IV patients with congenital heart disease, group V patients with Starr-Edwards aortic valve prostheses (model 1260) and group VI patients with various mitral valve prostheses. In each of these groups the highest recordable frequencies were measured. The peak frequencies varied widely in regard to frequency range in a comparison of the six groups. The maximum was reached at about 8000 c.p.s. in the case of the sounds of prosthetic valves. Furthermore, sound level examinations of the normal first and second heart sounds, as well as of the opening and closing sounds of the aortic valve prostheses were performed. The highest sound level of all of these sounds was found to lie within the low frequency range of 40 to 100 c.p.s. The results of both the measurements of the peak frequencies and of the maximal sound level were discussed on the basis of the presently accepted theories on the mechanism of heart sounds and murmurs.
记录正常心音、杂音以及主动脉瓣和二尖瓣人工瓣膜的开闭音于磁带上，以便获取胸壁可记录的最高频率。对这些磁带片段进行轮廓声谱分析。为此，组成并研究了六组：第一组为无心血管疾病者，第二组为二尖瓣功能不全患者，第三组为主动脉瓣功能不全患者，第四组为先天性心脏病患者，第五组为使用斯塔尔 - 爱德华兹主动脉瓣人工瓣膜（型号1260）的患者，第六组为使用各种二尖瓣人工瓣膜的患者。在每组中测量可记录的最高频率。在比较这六组时，峰值频率在频率范围方面差异很大。人工瓣膜声音的情况下，最高频率约达到8000赫兹。此外，对正常第一和第二心音以及主动脉瓣人工瓣膜的开闭音进行了声级检查。发现所有这些声音的最高声级位于4０至100赫兹的低频范围内。根据目前关于心音和杂音机制的公认理论，讨论了峰值频率测量结果和最大声级测量结果。
