RCIS-Hemodynamics Questions and Answers

RCIS-Hemodynamics Questions and Answers How is systolic ejection period measured? ANSWER The time the aortic valve is open. Between the beginning of aortic systole and the dicrotic notch. Categories of regurgitant fraction. ANSWER Regurg fraction less than 40% is mild. RF 40-60% is moderate. RF greater than 60% is severe. If a valve has regurg, how should CO be measured? ANSWER FICK Where is Thermo CO measured. ANSWER From RV to PA. Saline is injected in RV and read in PA. What does the C wave represent? ANSWER Onset of ventricular contraction. What is the most significant influence on vascular resistance? ANSWER Radius of the vessel lumen. What valve has the smallest area? ANSWER Aortic How does MI affect EF and EDP. ANSWER Increase EDP and reduces EF. Normal Rt Heart Pressures. ANSWER RA = 5 RV = 25/5 PA = 25/7-12 PCWP (Wedge) = 7-12 Normal Lt Heart Pressures. ANSWER LA = 7-12 (Typically measured via wedge). LV = 120/7-12 AO = 120/80