Realtime MRI Guided
Implantation of a Prosthetic Aortic Valve
Elliot McVeigh, Keith Horvath, Mike Guttman
This movie is a recording of the real-time MRI displayed
within the scan room for the surgeon during the deployment
of the prosthetic valve. The implantation has a number
of phases: (a) A guidewire is advanced through the
trocar across the native aortic valve. (b) The prosthetic
valve is advanced to the end of the trocar. (c) the
prosthetic valve is advanced into position in the left
ventricular outflow track. (d) the prosthetic valve
is inserted across the native valve and aligned with
the coronary ostia and the aortic annulus (e) a balloon
filled with dilute Gd-DTPA MR contrast agent is used
to expand the prosthetic valve (f) interactive saturation
is used to enchance visualization of the extent of
balloon inflation (g) the balloon is taken down and
pulled back through the trocar (h) the guidewire is
removed (i) the delivery device is removed from the
trochar. The total time between the emergence of the
prosthetic valve from the sheath to the extraction
of the balloon is 77 seconds.
