Computed Tomography Coronary Angiography (CTCA) and Coronary Flow in Stenosis Analysis
The investigators' rationale was to evaluate whether a 64-slice CT scanner allows accurate measurement of computed tomographic changes in coronary artery flow profiles and whether CT flow measurements are suitable for classifying the significance and hemodynamic relevance of a stenosis and thereby supplement as a functional parameter for morphological stenosis analysis.
Coronary Artery Disease
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||CT Coronary Angiography: Coronary Flow Quantification Supplements Morphological Stenosis Analysis|
|Study Start Date:||August 2007|
|Study Completion Date:||July 2008|
|Primary Completion Date:||July 2008 (Final data collection date for primary outcome measure)|
A total of 50 patients prospectively underwent computed tomography coronary angiography (CTCA) in a multidetector CT scanner (Brilliance 64, Philips) ± 1 day before or after invasive coronary angiography (ICA). Immediately thereafter, 2 radiologists reviewed the imaging data to detect any vessel segments with morphology poorly evaluable by CTCA. A locally constant cyclical measurement was acquired in these coronary arteries in breath-hold technique during the passage of a 50ml bolus of contrast media. For analysis, time-density curves of the bolus passage were registered in the coronary artery and the aorta (internal reference), the up-slopes were determined and correlated with each other. The results were compared with the ICA findings.