Vascular Quality Initiative Cardiac Risk Index of Bertges et al for Vascular Surgery

Description

Bertges et al reported the Vascular Quality Initiative (VQI) Cardiac Risk Index for patients undergoing vascular surgery. The authors are from the University of Vermont, University of Florida, University of Massachusetts, Dartmouth-Hitchcock Medical Center and Maine Medical Center.

Patient selection: vascular surgery

Outcome: perioperative myocardial infarction (POMI)

Parameters:

(1) procedure

(2) age in years

(3) serum creatinine in mg/dL

(4) stress test

(5) coronary artery disease

(6) diabetes

(7) congestive heart failure

Parameter	Finding	Beta Coefficient
procedure	carotid endarterectomy	0
	endovascular aneurysm repair	0.17
	infrainguinal bypass	1.12
	suprainguinal bypass	1.60
	open infrarenal abdominal aortic aneurysm repair	1.91
age	< 60 years	0
	60 to 69	0.44
	70 to 79	0.64
	>= 80 years	1.10
serum creatinine	<= 1.8 mg/dL	0
	> 1.8 mg/dL	0.76
	on dialysis	0.64
stress test	not performed	0
	normal	-0.15
	abnormal	0.46
coronary artery disease	none	0
	asymptomatic	0.4
	symptomatic	0.76
diabetes	none	0
	diet controlled	0.18
	noninsulin medication	0.2
	insulin	0.39
CHF	none	0
	asymptomatic	0.44
	symptomatic	0.5

value of X =

= SUM(points for all 7 parameters) - 5.82

probability of perioperative myocardial infarction =

= 1 / (1 + EXP((-1) * X))

Performance:

• The area under the ROC curve is 0.75.

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Vascular Quality Initiative Cardiac Risk Index of Bertges et al for Vascular Surgery

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