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心导纳二阶微分图是新近发展的一种无创性检测技术。对分析心动时相和测定心功能具有重要的临床意义。运用它观察心脏射血时血流加速度的变化,反映了血流动力学情况。对心动周期的时相分析中,用一阶微分较难分辨的标志点在二阶微分图图形上能够获得明显可靠的反映。至于它的波形形态的临床意义,还有待进一步探索研究。本文通过对心导纳二阶微分图的计测,试图为临床应用的研究探讨一点有价值的指
Heart admittance second-order differential graph is a newly developed non-invasive detection technology. It has important clinical significance for the analysis of cardiac phase and determination of cardiac function. Use it to observe the change of blood flow velocity in heart ejection, reflecting the hemodynamics. For the phase analysis of the cardiac cycle, the marked points that are difficult to be distinguished by the first derivative can obtain a clear and reliable reflection on the second derivative graph. As for the clinical significance of its waveform morphology, yet to be further explored and studied. In this paper, the cardiac admittance second-order differential graph measurement, trying to explore the clinical application of a little valuable