posted by Michael Izzi, patient & engineer, Long Island, New York, USA, May 19, 1998
Does the placement of a stiff tubular stent in a coronary artery, which is basically a curved, flexible vessel constantly stressed by motion on the surface of the heart, cause trauma to the artery at each extremity of the implant? If so, does this cause a healing response which increases the chances for restenosis?

• I certainly wouldn't characterize a stent as stiff or tubular (stents come in a variety of designs: coils, mesh, etc.) and each generation is more flexible and fluid-dynamic. However, there is a phenomenon known as "edge" restenosis which occurs, as you note, at the ends of the stent -- not necessarily due to trauma, however. As with all restenosis problems, this one is being studied with hopes that through better design, more information about proper placement and adjunctive therapies such as new drugs, this problem will be lessened in the near future.
Burt Cohen, PTCA.ORG, May 21, 1998

I am interested in the potential for the Angioplasty procedure to tear the Aorta. Is this common in procedures when more than one stent is placed? Are statistics available on this happening to patients? Is this caused by the doctor or the equipment? Thank you for any response given.
Steve Sendele, patient, Illinois, 2 Mar 2001

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