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[Correlation between Duke treadmill score and corrected thrombolysis in myocardial infarction frame count in patients with coronary atherosclerotic heart disease].

OBJECTIVE
To investigate the correlation between Duke treadmill score (DTS) and corrected thrombolysis in myocardial infarction frame count(CTFC )in patients with coronary atherosclerotic heart disease(CAD).


METHODS
Seventy-two patients with coronary atherosclerotic heart disease, who underwent treadmill exercise tests in 2 weeks before coronary angiography were enrolled in our study. All the patients were divided into 2 groups according to the value of DTS: low-risk group (DTS > or = 5) and moderate-high-risk group (DTS < 5). We evaluated the correlation between DTS and CTFC and compared the differences between the two groups.


RESULTS
DTS had a negative correlation with CTFC of left anterior descending branch (LAD), left circumflex artery (LCX) and right coronary artery (RCA)(r = -0.821,-0.730,-0.598, P<0.001). CTFC of all coronary arteries in the low-risk group was much lower than that of moderate-high-risk group [LAD: (22.27+/-3.71) frames vs (24.12+/-4.19) frames, respectively; LCX: (27.96+/-5.65) frames vs (31.28+/- 6.79) frames, respectively; RCA: (21.96+/-5.85) frames vs (24.64+/-7.33) frames, respectively], there was significant difference between the two groups.


CONCLUSION
There was a negative correlation between DTS and CTFC of left anterior descending branch, left circumflex artery and right coronary artery in patients with CAD. The risk stratification on the basis of DTS had a notable association with CTFC. These results may provide a theoretical evidence for utilizing the non-invasive method DTS to evaluate prognosis of patients with CAD.