View from inside a cannula that has been passed through a coronary artery. A balloon catheter is being passed through the catheter. Erythrocytes can be seen.

Vascular stent has been fully extended and the balloon catheter has begun to be deflated prior to removal. Expanded stent keeps artery lumen open.

View from inside a cannula that has been passed through a coronary artery. A balloon catheter is being passed through the catheter. Erythrocytes can be seen.

Image on left shows thorax with intra-aortic balloon catheter introduced via the femoral artery. Center image shows aorta with catheter inflated as in diastole. Image on right shows aorta with catheter deflated as in systole.

Introduction of umbilical artery catheter; (top) umbilical stump cut transversely above purse-string suture at base of cord; (middle) two hemostats evert edges and curved iris forceps gently dilate arterial lumen; (bottom) catheter inserted into umbilic

Dilation, balloon catheter