ENERGY SPECTRA OF CARDIAC SOUNDS

已有400多名患者使用HIGH进行了心音描记 频率麦克风和加速度计系统。输入是 数字化快速变换傅立叶分析在波形分析中的应用 论坛。以分贝为单位的能量与频率的关系图按原样获得 撞击或关闭声音以确定封堵器的同步性或 传单闭合。正常开启和关闭声音的特征 已经获得了。数据来自猪瓣膜(71 主动脉瓣124例，二尖瓣124例，机械瓣138例，二尖瓣58例。 100多名患者听到了他们假肢的声音 设备测量不止一次。分析表明，对于大动脉 猪的收缩期射血杂音的峰值频率是 与最大闭合能量的频率密切相关 已有20多个瓣膜被证明是由能量引起的功能失调。 光谱分析和心导管检查。更换 在大多数情况下，对疲劳的人工瓣膜进行了修复。 病理研究证实有明显的小叶钙化和 疲惫。再跟踪同一名患者几年将是 声能谱预测值之前的要求 可以将记录作为患者的一种筛查方法 安装了生物瓣膜。

More than 400 patients have had phonocardiography using a high frequency microphone and accelerometer system. The input is digitized and fast transform fourier analysis applied to the wave fora. Energy in dB versus frequency plots are obtained as are impact or closure sounds to determine synchrony of occluder or leaflet closure. Signatures of normal opening and closing sounds have been obtained. The data were obtained from porcine valves (71 aortic, 124 mitral) and mechanical valves (138 aortic, 58 mitral). More than 100 patients have had the sounds of their prosthetic device measure more than once. Analysis have shown for the aortic porcine that the peak frequency of the systolic ejection murmur is tightly correlated to the frequency of maximal closure energy more than 20 valves have been shown to be dysfunctional both by energy spectra analysis and cardiac catheterization studies. Replacement of the fatigued prosthetic valve has been performed in most cases. Pathologic studies confirm marked leaflet calcification and fatigue. Several more years of tracking the same patient will be required before the predictive value of acoustic energy spectra recording can be established as a screening method for patients with bioprosthetic valves.