Please click here to obtain permission to reproduce this image.
Click on image to view larger version.
Figure 1 Coronary MRA of NTG-Induced Coronary Vasodilation
Coronary magnetic resonance angiography (MRA) images are shown demonstrating the analysis of nitroglycerin (NTG)-induced vasodilation. Coronary MRA of the right coronary artery (RCA) was performed pre- and post-NTG using a 0.7-mm gated, breath-held spiral MRA sequence. Cross-sectional area of the RCA was traced manually (red circles). The MRA images (A) from the patient with a coronary artery calcium (CAC) score = 0 show a greater degree of NTG coronary vasodilation (28.6%) compared with MRA images (B) from the patient with a CAC score = 443 (coronary vasodilation = 17.0%).
|
