Research Article
Effectiveness of Myocardial Contrast Echocardiography Quantitative Analysis during Adenosine Stress versus Visual Analysis before Percutaneous Therapy in Acute Coronary Pain: A Coronary Artery TIMI Grading Comparing Study
Table 4
Comparison of myocardial perfusion parameters at rest and stress among TIMI flow grades.
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A: indicates myocardial blood volume; β: myocardial blood flow velocity; A × β: myocardial blood flow; A-reserve: stress A/rest A; β-reserve: stress β/rest β; A × β-reserve: stress A × β/rest A × β; TIMI: thrombolysis in myocardial infarction trial. The correlation between the means of A, β, and A × β at rest and TIMI grade reached significant (rs = 0.741, 0.528, and 0.715, resp., values <.001). The correlation between the means of A, β, and A × β at stress and TIMI grade reached significant (rs = 0.872, 0.767, and 0.845 for A, β, and A × β, resp., values <.001). * versus TIMI grade 3. § versus TIMI grade 2. † versus TIMI grade 1. # versus parameter in rest. *Welch tests. |