The outcome in patients with dilated cardiomyopathy can be predicted using 2 scores calculated from electrocardiographic and clinical findings.
First Principal Component Axis (I)
|
Parameter |
Finding |
Score |
|
supraventricular arrhythmia |
absent |
-0.09 |
|
|
present |
+0.14 |
|
prolongation of the QRS interval |
absent |
-0.18 |
|
|
present |
+0.29 |
|
low voltage |
absent |
-0.06 |
|
|
present |
+0.48 |
|
left axis deviation |
absent |
-0.06 |
|
|
present |
+0.22 |
|
high grade ventricular arrhythmia |
absent |
-0.05 |
|
|
present |
+0.11 |
|
NYHA functional classification |
I or II |
-0.19 |
|
|
III |
+0.21 |
|
|
IV |
+0.41 |
|
cardiothoracic ratio in percent |
< 55% |
-0.26 |
|
|
>= 55 to < 65% |
-0.01 |
|
|
>= 65% |
+0.39 |
|
left ventricular end diastolic pressure in mm Hg |
< 18 mm Hg |
-0.16 |
|
|
>= 18 mm Hg |
+0.17 |
|
ejection fraction in percent |
>= 27% |
-0.17 |
|
|
< 27% |
+0.19 |
Second Principal Component Axis (II)
|
Parameter |
Finding |
Score |
|
supraventricular arrhythmia |
absent |
-0.19 |
|
|
present |
+0.29 |
|
low voltage |
absent |
-0.02 |
|
|
present |
+0.18 |
|
left axis deviation |
absent |
+0.12 |
|
|
present |
-0.47 |
|
high grade ventricular arrhythmia |
absent |
+0.11 |
|
|
present |
-0.23 |
|
NYHA functional classification |
I or II |
-0.07 |
|
|
III |
+0.98 |
|
|
IV |
-0.54 |
|
cardiothoracic ratio in percent |
< 55% |
-0.41 |
|
|
>= 55 to < 65% |
+0.62 |
|
|
>= 65% |
-0.53 |
where:
• The representation of the ">" and "<" in the original tables differs from the expected manner (being placed to the left or right of the number); the directions above are hopefully correct.
first principal component axis score (I) =
= SUM(scores for all 9 parameters)
second principal component axis score (II) =
= SUM(scores for all 6 parameters)
Interpretation:
• If the first principal component axis score is <= 0, then the patient has a good chance for survival. Patients with the first principal component axis score > 0 have a high risk of death.
• For those patients with poor prognosis, if the second principal component axis score is >=0 then sudden death is more likely; if the second principal component axis score is < 0, then severe refractory heart failure can be expected.
Purpose: To predict the prognosis for a patient with dilated cardiomyopathy based on electrocardiographic and clinical findings.
Specialty: Cardiology
Objective: criteria for diagnosis, severity, prognosis, stage
ICD-10: I42.0,
