Comparative study of the assessment of left ventricular function with 64-slice spiral CT at different R-R intervals
Objective To evaluate left ventricular (LV) function with 64-slice spiral CT at different R-R intervals. Methods 50 patients with suspected coronary artery disease underwent 64-slice CT coronary angiography. The o-riginal data were reconstructed with the 2%, 5%, 10% and \5% R-R intervals. Left ventricular end diastolic volume (EDV), end systolic volume (ESV), stroke volume (SV) and left ventricular ejection fraction (LVEF) was measured at different R-R intervals. Results Left ventricular end-systolic volume is overestimated at 5% , 10% R-R interval, and left ventricular end diastolic volume, stroke volume and left ventricular ejection fraction is underestimated at 5%, 10% R-R interval. The data of 5%, 10% R-R interval with no difference that can be used for left heart functional assessment, and the data of 2%, 15% R-R interval with significant difference that can not be used for left heart functional assessment. Conclusion It is simple to assess cardiac function at 10% R-R interval, there is no significant difference in stroke volume and left ventricular ejection fraction.
NETL
NSTL
万方数据
维普
