Coronary Artery Patency After Metallic Stent Implantation Evaluated by Multislice Computed Tomography
A 56-year-old man presented to our hospital because of chest pain on effort. Conventional coronary angiography revealed high-grade stenosis in the proximal and distal portions of the left anterior descending branch (LAD). We therefore performed percutaneous transluminal coronary angioplasty with metallic stent implantation at the stenotic sites. Four months after the stent placement, ECG-gated enhanced multislice computed tomography (CT) (Light Speed Ultra, General Electric) was performed with a 1.25-mm slice thickness, helical pitch 3.25, to evaluate the coronary artery lumen for restenosis at the stent implantation sites. After intravenous injection of 100 mL of iodinated contrast material (350 mgI/mL), CT scanning was performed with retrospective ECG-gated reconstruction. After acquisition, volume data were extracted from end-diastole, and volume-rendering images were generated (M900 Zio). In the axial source image and cut-plane volume rendering image, the patency of the coronary arterial lumen of the proximal portion of the LAD surrounded by the metallic stent (arrows, Figure 1, arrows) was observed without any artifact from the metallic stent. The next day, conventional coronary angiography showed no significant luminal stenosis of the proximal (Figure 2, arrow) and distal portions of the LAD.
The editor of Images in Cardiovascular Medicine is Hugh A. McAllister, Jr, MD, Chief, Department of Pathology, St Luke’s Episcopal Hospital and Texas Heart Institute, and Clinical Professor of Pathology, University of Texas Medical School and Baylor College of Medicine.
Circulation encourages readers to submit cardiovascular images to the Circulation Editorial Office, St Luke’s Episcopal Hospital/Texas Heart Institute, 6720 Bertner Ave, MC1-267, Houston, TX 77030.