DM DOC 040 Rev 1.0
CSE Abbreviations
NL
=
Normal
LVH
=
Left ventricular hypertrophy
RVH
=
Right ventricular hypertrophy
BVH
=
Right and left ventricular hypertrophy
MI
=
Myocardial infarction
AMI
=
Anterior myocardial infarction
IMI
=
Inferior myocardial infarction
MIX
=
Anterior and inferior myocardial infarction
VH+MI =
Ventricular hypertrophy and myocardial infarction
OTHER=
Cardiologist defined abnormality excluding above definitions
Results
Results from an analysis of the CSE database in . In this case, the gold standard (“truth”) was
derived from the clinical data.
TYPE A STATEMENTS
1
DIAGNOSTIC
CATEGORY
SENSITIVITY
SPECIFICITY
PPV
NPV
PREVALENCE
Normal
97%
77%
2
66%
2
98%
382/1220
LVH
57%
98%
82%
93%
183/1220
RVH
44%
100%
92%
97%
55/1220
BVH
47%
99%
78%
98%
53/1220
AMI
72%
98%
88%
96%
170/1220
IMI
71%
99%
93%
92%
273/1220
MIX
63%
98%
69%
98%
73/1220
Total Accuracy: 73.7% Partially correct: 75.7% (both on 1220 cases)
1
The CSE database does not allow a meaningful interpretation of statistics on statements
involving “possible” and “probable” qualifiers. They are taken into account in determining the
sensitivity etc of the various diagnoses as the statement with the highest likelihood, where definite
> probable > possible, is given most weight in handling a specific interpretation.
2
Specificity and positive predictive value for ‘NORMAL’ should be interpreted carefully. A report
of ‘NORMAL’ in a case of ‘MYOCARDIAL INFARCTION’ or ‘hypertrophy’ contributes to decreased
specificity for ‘NORMAL’ (even though the ECG may appear ‘NORMAL’). In the CSE study, an
ECG report stating only ‘MYOCARDIAL ISCHEMIA’ was mapped to ‘NORMAL’ even if the true
answer was ‘INFARCTION’, thereby also contributing to decreased specificity for ‘NORMAL’.
© 2013 DanMedical Ltd
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