Equation of Detrano et al for Predicting Coronary Artery Disease in Patients Having Exercise Testing

Description

Detrano et al developed an equation for estimating the risk of coronary artery disease in a patient who has undergone exercise testing. Coronary artery disease was considered present if there was at least 1 major coronary artery with > 50% luminal narrowing. The score can help identify patients with sufficient risk to justify additional testing.

Parameters:

(1) age

(2) gender

(3) chest pain symptoms

(4) METs

(5) maximal heart rate in beats per minute

(6) exercise-induced angina

(7) mm ST depression

Parameter	Finding	Points
gender	female	1
	male	-1
chest pain symptoms	none	4
	typical	1
	atypical	2
	nonanginal pain	3
exercise-induced angina	present	1
	absent	-1

X =

= 1.9 + (0.025 * (age in years)) - (0.6 * (points for gender)) – (0.1 * (points for chest pain symptoms)) – (0.05 * METs) – (0.02 * (maximal heart rate)) + (0.36 * (points for exercise-induced angina)) + (0.6 * (mm ST depression))

probability of coronary artery disease =

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

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Description

Specialty

ICD-10