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Resting ECG
Interpretation Algorithm Performance
Analysis
Formulas used in
calculating the figures contained in the
performance analysis of the resting ECG
interpretation algorithm are contained in
the chart below.
| |
Formula
|
| Performance Measures |
Defined as
|
| Sensitivity |
TP
TP+FN
|
| Positive
Predictivity |
TP
TP+FP
|
| False Positive Rate |
FP
TN+FP
|
| Where: |
|
True
Positive =
(TP)
|
A true positive
is called when the arrhythmia
algorithm agrees with the
positive diagnostic statement
made by the physician, i.e., true
positive call by the arrhythmia
algorithm . |
True Negative =(TN)
|
A true negative is
called when the arrhythmia
algorithm agrees with the
negative diagnostic statement
made by the physician, i.e., the
condition under question is
not called by either the
arrhythmia algorithm or the
physician. |
False Positive =
(FP)
|
A false positive occurs
when the arrhythmia algorithm
appends the diagnostic statement
to the ECG in question whereas
the physician indicates that the
condition did not exist, i.e., a
false positive call by the
arrhythmia algorithm . |
False Negative =
(FN)
|
A false negative occurs
when the physician appends the
diagnostic statement to the ECG
in question whereas the
arrhythmia algorithm indicates
that the condition did not exist,
i.e., a false negative call by
the arrhythmia algorithm . |
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