Packing a lot of punch, thanks for sharing you knowledge. How ever please review on the Dicrotic notch. When measure in aorta, aortic valve closure causes a sudden pressure increase, creating a sharp notch called incisura. Further down the arterial tree, incisura disappears and reflected waves replace it called Dicrotic notch. see: Valve origin of the aortic incisura, H N Sabbah, P D Stein, Am J Cardiol. 1978 Jan.