Cardiac MRI

Cardiac MRI

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

 

 


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