RIU 324 Study Guide - Final Guide: Pulsatile Flow, Windkessel Effect, Blood Pressure
23 Apr 2020
School
Department
Course
Professor
Document Summary
Velocity and flow changes with percentage stenosis, notice that the volumetric flow is maintained for percentage decreases in cross-sectional area up to about 75%. Notice that as the percent stenosis increases, the velocity increases to maintain the volumetric flow. Eventually, the increased energy loss related to frictional and viscous losses dominates and the peak velocity decreases precipitously. Arterial or pulsatile flow: systole is when heart is fully contracted = max. Conduit vessels are large and a change in diameter doesn"t change the flow rate (increase velocity to compensate). resistance vessels are small (< 1 mm). F: total fluid energy content of blood decreases as it moves through the circulation. E: peak-to-peak frequency, mean, pi generally increases from central to peripheral vessels, pi will be decreased after a hemodynamically significant, distal arteries will have the highest pi (i. e. radial artery) stenosis. Systolic acceleration and pressure: step 1: relate pressure with volume change. B: step 2: related volume change with velocity change.
