کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2964929 1178726 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Normal myocardial perfusion on 64-detector resting cardiac CT
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
پیش نمایش صفحه اول مقاله
Normal myocardial perfusion on 64-detector resting cardiac CT
چکیده انگلیسی

BackgroundComputed tomography (CT) of the heart is increasingly used to characterize not only the coronary arteries but also cardiac structure and function. The performance of CT in depicting myocardial perfusion is under active investigation.ObjectiveWe describe the pattern of normal myocardial perfusion on resting 64-detector cardiac CT.MethodsPatients (n = 33; 20 women, 13 men; mean age, 52 years) with normal radionuclide myocardial perfusion imaging and normal coronary arteries on CT angiography (120 kVp) comprised the study population. Segmental myocardial perfusion on CT was measured in Hounsfield units (HU) with manual and semiautomated methods for the 17-segment American Heart Association model in both systole and diastole. Segments were aggregated into coronary artery territories, from apex to base and by myocardial wall. The relationships between myocardial perfusion and various patient factors were evaluated.ResultsOverall mean myocardial perfusion was 98 HU in systole and 94 HU in diastole with the manual method (P = .011) and 92 HU in systole and 95 HU in diastole with the automated method (P = .001). The septum showed significantly higher mean attenuation values than the other walls in systole and diastole with both methods. Generally, attenuation values were lower in the left circumflex artery territory and in the apex. Bivariate analysis showed higher mean myocardial attenuation values for women than men, although this difference did not persist on multivariate analysis adjusted for patient size.ConclusionNormal mean resting myocardial perfusion correlates with CT attenuation values of approximately 92–98 HU on CT angiography in the coronary arterial phase. The septum consistently shows greater attenuation values than the other walls.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cardiovascular Computed Tomography - Volume 5, Issue 1, January–February 2011, Pages 52–60
نویسندگان
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