medical decision support medical decision support
Sign In

Prognostic Scores for Dilated Cardiomyopathy

Purpose: To predict the prognosis for a patient with dilated cardiomyopathy based on electrocardiographic and clinical findings.

Description

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.

 


To read more or access our algorithms and calculators, please log in or register.

Specialty

Objective

ICD-10