Stents can open up blocked brain arteries after other stroke treatments have failed, according to research being presented at the 23rd annual International Symposium on Endovascular Therapy (ISET) held in Miami from 16 to 18 January 2011.
In research conducted at the Baptist Cardiac & Vascular Institute in Miami, USA, stents were placed in the blocked brain arteries of 19 acute stroke patients who had not been helped by clot-busting drugs or clot-removal devices. The stents opened up the arteries in 18 of the 19 (95%) patients, and this resulted in 12 (63%) who had minimal or no deficits. Five patients (26%) died from major strokes.
“If stents had not been used to restore blood flow after these serious strokes, mortality or severe disability would have occurred in approximately 80 to 90% of patients,” said Italo Linfante, director of Endovascular Neurosurgery at the Institute. Currently, using stents to treat acute stroke is an experimental procedure of last resort, used when all other methods have failed. Approved treatments include breaking up the clot with drugs, removing it with a corkscrew-like device and vacuuming it out.
“FDA-approved treatments to restore blood flow in acute ischemic stroke work 40 to 60% of the time. If the artery remains blocked, the patient will suffer death or severe disability,” said Linfante. “Our findings suggest stents can work when clot busting-drugs and clot-removal devices do not, and are a safe and feasible option.”
Stents have long been used preventatively to open up clogged heart and neck arteries to thwart stroke and heart attack. Scientists have recently discovered that stents may also be used as a treatment device, meaning doctors place them in blocked arteries to treat heart attacks and strokes.