Application of circumferencial myocardial function maps of tissue Doppler in patients with acute myocardial infarction

Objective: A circumferencial functional map (CFM) of tissue Doppler imaging (TDI) was applied in patients with coronary artery disease (CAD) and the accuracy of CFM in assessment of ischemic region in patients with acute myocardial infarction (AMI) was evaluated. Methods: CFM was performed in 59 patients with CAD and 26 subjects as control. Patients with CAD were divided into subgroups of AMI (n=23) and myocadial ischemia (n=36). The spatial distribution of hypokinetic motion of endocardium. could be demonstrated by CFM in which left papillary muslue was considered as the beginning point and the measurement was made from 0° to 360° on CFM. Results: The curve of endocardial motion in patients with AMI was shifted towards zero line on CFM and the extent of wall motion abnormality would be described quantitatively. The extent of abnormal segments in AMI was broader than that in myocadial ischemia subgroup ([75.64 ± 37.56]° vs [33.44 ± 11.81]°, P<0.001). Conclusion: CFM at the midpapillary muscle level could be used in detection of hypokinetic segments, which might increase the ability of TDI in assessing coronary artery disease.

Duke Scholars

Author Fang-Fang Yin Radiation Oncology