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.