The author describes a new sound in systole which he calls the V1th heart sound. This sound can be recorded in patients with pure aortic incompetence, but also in healthy subjects. It is not sufficiently loud to be heard on auscultation. It is visible only on the low frequency bands at 35 Hz, and rarely at 70 Hz. It is maximal at the apex and the endapex. It is characterised by 1 or 2 oscillations at the end of mesosystole and at the beginning or middle of end-systole. This sound may be physiological: it will then be of low amplitude, and further from the 2nd sound than in cases of pure aortic incompetence, in which it is pathological, and closer to the 2nd sound. The author puts forward two hypotheses for the origin of the VIth sound.
作者描述了一种新的收缩期声音，他称之为第六心音。这种声音可以在单纯主动脉瓣关闭不全的患者中记录到，但在健康受试者中也能记录到。它的声音不够响亮，听诊时听不到。它仅在35赫兹的低频波段可见，70赫兹时很少见。在心尖和心尖末端最为明显。它的特征是在收缩中期结束时以及收缩末期开始或中间有1或2次振荡。这种声音可能是生理性的：此时它的振幅较低，且比单纯主动脉瓣关闭不全（此时为病理性）的情况更远离第二心音，更接近第二心音。作者对第六心音的起源提出了两种假设。
