Blais et al identified a number of risk factors for short-term mortality following aortic valve replacement (AVR). The authors are from Laval University in Quebec, Canada.
Patient selection: aortic valve replacement
Outcome: 30-day mortality following surgery
Parameters:
(1) left ventricular ejection fraction
(2) infective endocarditis
(3) timing of the surgery
(4) cardiopulmonary bypass time in minutes
(5) prosthetic-patient mismatch (PPM) for the valve
|
Parameters |
Finding |
Points |
|
left ventricular ejection fraction |
>= 40% |
0 |
|
|
< 40% |
1 |
|
infective endocarditis |
absent |
0 |
|
|
present |
1 |
|
timing of the surgery |
routine |
0 |
|
|
emergent or salvage |
1 |
|
cardiopulmonary bypass time |
<= 120 minutes |
0 |
|
|
> 120 minutes |
1 |
|
PPM |
none or mild |
0 |
|
|
moderate or severe |
1 |
total number of risk factors =
= SUM(points for all 5 parameters)
Interpretation:
• minimum number of risk factors: 0
• maximum number of risk factors: 5
• The short-term mortality increases with the number of risk factors present.
|
PPM |
LVEF < 40% |
LVEF >= 40% |
|
none or mild |
RR 2.7 |
RR 1.0 |
|
moderate |
RR 7.1 |
RR 1.8 |
|
severe |
RR 77.1 |
RR 11.3 |
Specialty: Cardiology
ICD-10: ,
