I'm a fairly new nurse and have to print off/analyze ECG and CVP strips on a regular basis. I have been through critical care class and have many references, but I'm still not clear on something. When taking the mean of the A-wave, at what point is diastole if there is a C-wave present? I come down from the ECG P-wave, and on the CVP tracing the next pos deflection is A-wave. So the top of the A-wave is systolic, but then there's a C-wave "bump" on the downslope before it bottoms out and leads into the V-wave. Where do I read diastole - valley before C-wave?