ECG Score of Ostman-Smith et al for Predicting Risk of Sudden Death in a Patient with Hypertrophic Cardiomyopathy

any deviation in QRS axis

absent

0

present

1

pathologic T wave inversion

none

0

limb leads only

1

precordial leads with or without change in limb leads

2

ST segment depression

none or < 2 mm

0

>= 2 mm

2

dominant S wave in V4

absent

0

present

2

limb lead QRS amplitude sum

< 7.7 mV

0

7.7 to 9.9 mV

1

10 to 11.9 mV

2

>= 12 mV

3

12 lead amplitude duration product

< 2.2 mV•s

0

2.2 to 2.49 mV•s

1

2.5 to 2.99 mV•s

2

>= 3.0 mV•s

3

QTc

< 440 ms

0

>= 440 ms

1