2024年10月3日 · \[ RWT = \frac{2 \times PWT}{LVD} \] \(RWT\) is the Relative Wall Thickness, \(PWT\) is the posterior wall thickness in millimeters, \(LVD\) is the LV diastolic diameter in millimeters. Example Calculation. For a patient with a posterior wall thickness of 11 mm and an LV diastolic diameter of 50 mm, the Relative Wall Thickness is calculated as: