Liu et al reported the QQ-LAE score for evaluating a patient having cardiac resynchronization therapy. This can help to identify a super-responder. The authors are from Peking Union Medical College and Capital Medical University in Beijing.
Super-responder: dramatic improvement of left ventricular ejection fraction with excellent long-term outcome (defined as absolute increase of LVEF >= 15% at 6-month follow-up)
Parameters:
(1) prior no fragmented QRS (Q)
(2) QRS duration (Q)
(3) left bundle branch block (L)
(4) left atrial diameter in mm (A)
(5) left ventricular end-diastolic diameter (LVEDd) in mm (E)
Parameter
Finding
Points
prior fragmented QRS
no
1
yes
0
QRS duration
< 170 ms
0
>= 170 ms
1
left bundle branch block
no
0
yes
1
left atrial diameter
< 45 mm
1
>= 45 mm
0
LVEDd in mm
< 75 mm
1
> 75 mm
0
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 5
Total Score
Percent Super Responder
0 to 3
15%
4
40%
5
64%
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