case_images: PMC4220423_01
case_images: 18-year-old male with complex congenial heart disease had attacks of ventricular tachycardia and oxygen saturation levels that showed discrepancy between the upper and the lower extremities, later diagnosed with a rare collateral vein draining from the left subclavian vein to the great cardiac vein. Three-dimensional MDCT of the heart and thorax demonstrates extraordinary dilated azygous vein (small arrowhead) draining into the superior vena cava (large arrow head), and the inferior vena cava (large arrow) draining directly into the right atrium (small arrow).
case_images: JCIS-4-58-g002.jpg
case_images: PMC4220423_01_JCIS-4-58-g002.jpg
case_images: F1
case_images: Bilateral MDCT venography of the thoracic venous system performed demonstrated significant collateral venous blood supply from the left subclavian vein to the coronary sinus via the left superior intercostal vein and unusual collateral left vein that drained into the great cardiac vein, and markedly dilated superior vena cava, inferior vena cava, and azygous vein [Figures 1 and 2].
case_images: 18-year-old male with complex congenial heart disease had attacks of ventricular tachycardia and oxygen saturation levels that showed discrepancy between the upper and the lower extremities, later diagnosed with a rare collateral vein draining from the left subclavian vein to the great cardiac vein. Three-dimensional MDCT of the heart and thorax demonstrates the collateral vein (large arrowhead) from the left subclavian vein (small arrowhead) draining into the great cardiac vein (arrow).
case_images: JCIS-4-58-g003.jpg
case_images: PMC4220423_01_JCIS-4-58-g003.jpg
case_images: F2
case_images: Bilateral MDCT venography of the thoracic venous system performed demonstrated significant collateral venous blood supply from the left subclavian vein to the coronary sinus via the left superior intercostal vein and unusual collateral left vein that drained into the great cardiac vein, and markedly dilated superior vena cava, inferior vena cava, and azygous vein [Figures 1 and 2].
case_images: 18-year-old male with complex congenial heart disease had attacks of ventricular tachycardia and oxygen saturation levels that showed discrepancy between the upper and the lower extremities, later diagnosed with a rare collateral vein draining from the left subclavian vein to the great cardiac vein. Determination of contrast bolus transit time using test bolus injection shows that the region of interest is placed inside the superior vena cava (circle A) and in the pulmonary trunk (circle B). Resulting enhancement curves display the time needed to reach the peak of maximum contrast enhancement for test bolus.
case_images: JCIS-4-58-g004.jpg
case_images: PMC4220423_01_JCIS-4-58-g004.jpg
case_images: F3
case_images: This ROI assessed the time to peak (TTP) and determined the arteriovenous circulation time for thoracic vasculature [Figure 3].