Input impedance: Wave reflections & Fourier analysis

This lecture covers the concept of input impedance in the context of wave reflections and Fourier analysis of arterial waves. It explains how wave reflections can be augmented by peripheral occlusion, the relationship between pressure and flow during Valsalva strain, and the breakdown of pressure and flow pulses into their Fourier components. The instructor discusses the definition of input impedance, its presence or absence of reflections, and its modulation by peripheral resistance and compliance. Examples of input impedance in different scenarios, such as a frictionless tube with a fully blocked end, are also presented. Furthermore, the effects of hypertension on input impedance are explored, along with the reconstruction of arterial waves using Fourier analysis.