Reflection Coefficient in Pressure Pulse of Human Blood Flow

The cardiovascular system is a result of evolutionary process with the main purpose to streamline its functionality. Although, applying scientific theorems on this biological system the first impression will be that is behave in a weird manner. Analyzing the pulse pressure waveform from brachial artery will show that the primary wave which is given by the heart cycle is followed by a secondary wave. The ratio of the amplitudes of the two waves during at one cardiac cycle given the reflection coefficient. This term has a major importance in medical diagnosis since it reveals cardiovascular disease or give an insight about performance of the blood flow. An experiment with external induced pressure was made in order to highlight the behavior of the arterial system. The test was conducted on a young healthy subject without any cardiovascular affection in the past. The results show a variation of the reflection coefficient dependent by the subject systolic and diastolic pressure.