This is the gradient across the aortic valve, it is raised in aortic stenosis. If the gradient is 50mmHG this is significant. However the patients clinical symptoms should be assessed along with the investigative findings.
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(-1.5,0) (1.5,0) what is the gradient?
Draw a tangent to the curve at the point where you need the gradient and find the gradient of the line by using gradient = up divided by across
A positive gradient goes uphill from left to right A negative gradient goes downhill from left to right
If the gradient is a positive number the curve is increasing, and if the gradient is a negative number it is decreasing.
The relation is that gradient and slope are both angled lines.