Lin et al reported a score for identifying coronary artery spasm in a patient with chest pain. The authors are from Jinan University and affiliated hospitals in Guangdong, China.
Patient selection: chest pain
Patient exclusion: coronary artery stenosis > 50%
Parameters:
(1) history of allergies
(2) history of asthma
(3) angina attack at rest
(4) ST segment elevation
(5) myocardial bridge (characteristic phasic systolic compression of the coronary artery with decrease >= 30% in diameter after intracoronary nitroglycerin infusion)
(6) hyperventilation test (positive if there are transient abnormalities of regional wall motion of the left ventricle on echocardiography OR chest pain with ischemic ECG changes; nitroglycerin should be stopped 2 hours before)
Parameter
Finding
Points
history of allergies
no
0
yes
3
history of asthma
no
0
yes
2
angina at rest
no
0
yes
10
ST segment elevation
no
0
yes
2
myocardial bridge
no
0
yes
2
hyperventilation test
negative
0
positive
8
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 27
• The cutoff was taken as 11 or 12.
Performance:
• The area under the ROC curve is reported as 0.97 (although sensitivity and specificity are lower).
To read more or access our algorithms and calculators, please log in or register.
