Calculated Fields
In the Cardiac MRI worksheet, the following fields are calculated automatically. These calculated values automatically update when any of the source values are changed.
Field | Source Values | Calculation Logic |
|---|---|---|
Max APHR | Age | (220 – Age) |
90% of Max APHR (Target) | Max APHR | (Max APHR * 0.9) |
% of Max | Max APHR Max Achieved | (Max Achieved ÷ Max APHR) * 100 |
% of Target APHR | 90% of Max APHR Max Achieved | (Max Achieved ÷ 90% of Max APHR) * 100 |
Duke Treadmill Score | Duration (min:sec) from Exercise section Max ST Deviation Angina Scale (0, 1, or 2) | Duration – (5 * Max St Deviation) – (4 * Angina Scale) |
METs | Last grade and speed with a BP or HR entry | (HC + VC + 3.5) ÷ 3.5
HC = (Speed * 26.8 * 0.1)
VC = [Speed * 26.8 * 1.8 * (Grade ÷ 100)]
Note: METs will only be calculated for the following test types: Exercise Treadmill, Adenosine with Treadmill, or Regadenoson with Treadmill. The calculation will use the HR and BP from the last stage in which all values are documented. |
Double Product | Heart Rate (HR) Systolic Blood Pressure (SBP) from last stage with both entered (not Rest)
| HR * SBP
|