Editing Afterload (section)

== Calculating afterload ==
Quantitatively, afterload can be calculated by determining the wall stress of the left ventricle, using the [[Young–Laplace equation]]:{{cn|date=March 2021}}

<math display="inline">\left ( \frac{EDP \cdot EDR}{2h} \right )</math> where

EDP is [[end-diastolic pressure]] in the left ventricle, which is typically approximated by taking [[pulmonary artery wedge pressure]],

EDR is end-diastolic [[radius]] at the midpoint of the left ventricle, and

''h'' is the mean thickness of the left ventricle wall. Both radius and mean thickness of the left ventricle may be measured by [[echocardiography]].