the only way of directly viewing the coronary arteries
As discussed in the section on Cardiac
Catheterization, a coronary angiogram is a shadow view
of the coronary arteries that serves a dual purpose: diagnosis
and treatment -- the continuous fluoroscopic TV image allows
the interventional cardiologist
various wires, balloons and stents, as they are advanced towards
But what if a tiny camera could
be mounted on the front of the catheter as it is snaked up the
aorta and into the left or right coronary artery? We could see
a cross-sectional view of the blockage. Enter IVUS, or intravascular
ultrasound. With the invention and refinement of IVUS, it is
thread a miniaturized
ultrasound transducer or "camera" into
the coronary arteries to give a valuable cross-sectional view from
the inside-out, showing the physician where the normal artery wall
ends and the plaque begins.
and related technologies have implications for the treatment of
patients, from determining whether or not to do an angioplasty, to
ensuring that a stent, if placed, is sized correctly and placed optimally.
For more information, the latest news, features and interviews with
leading physicians, visit our Intravascular
the Procedure: Intravascular Ultrasound
is done during an angioplasty by an
interventional cardiologist in the catheterization laboratory
with the cath lab team.
Preparation:Since IVUS is
seldom performed as a stand-alone imaging procedure, but as
part of the angioplasty/stent procedure, no additional preparation
is needed: the preparation is the same
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