Martin et al reported the UK-TAVI score for predicting 30-day mortality after transcatheter aortic valve implantation. The authors are from University of Manchester, Queen Elizabeth Hospital Birmingham, James Cook University Hospital, Guys and St Thomas NHS Foundation Trust, Keele University Royal Brompton and Harefield National Health Service and John Radcliffe Hospital.
Patient selection: transcatheter aortic valve implantation (TAVI)
Outcome: 30-day mortality
Parameters:
(1) body mass index in kg per square meter
(2) age in years
(3) sex
(4) critical status pre-op
(5) extracardiac arteriopathy
(6) eGFR in mL per min per 1.73 square m
(7) access site
(8) pulmonary artery systolic pressure in mm Hg
(9) prior balloon aortic valvuloplasty (BAV)
(10) pulmonary disease
(11) sinus rhythm
(12) surgical acuity (elective vs non-elective)
(13) Katz score of activities for daily living (from 0 to 6)
(14) mobility
points for BMI =
= (0.0011 * (((BMI) -27.3)^2)) - (0.0257 * ((BMI) - 27.3))
|
Parameter
|
Finding
|
Points
|
|
age in years
|
|
0.0115 * ((age) -81.25)
|
|
sex
|
female
|
0.1393
|
|
|
male
|
0
|
|
critical status pre-op
|
no
|
0
|
|
|
yes
|
0.5914
|
|
extracardiac arteriopathy
|
no
|
0
|
|
|
yes
|
0.1912
|
|
eGFR
|
|
-0.0342 * ROUND(GFR/5)
|
|
access site
|
transfemoral
|
0
|
|
|
other
|
0.5436
|
|
pulmonary artery systolic pressure
|
<= 60
|
0
|
|
|
> 60
|
0.1887
|
|
prior BAV
|
no
|
0
|
|
|
yes
|
0.2469
|
|
pulmonary disease
|
no
|
0
|
|
|
yes
|
0.214
|
|
sinus rhythm
|
no
|
0
|
|
|
yes
|
-0.1798
|
|
surgical acuity
|
elective
|
0
|
|
|
non-elective
|
0.3719
|
|
Katz score
|
|
0.2362 * (6 - (Katz))
|
|
mobility
|
good or fair
|
0
|
|
|
poor
|
0.6302
|
X =
= SUM(points for all 14 parameters) - 3.6119
probability of 30-day mortality =
= 1 / (1 + EXP((-1) * X))
