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Holmium YAG laser coronary angioplasty with multifiber catheters.

Abstract：

:Excimer lasers are being extensively used for coronary angioplasty along with multifiber over-the-wire catheters. To determine whether another wavelength could be an alternative, the laser-tissue interaction and the clinical usefulness of an infrared laser were studied. The laser consisted of a Holmium YAG pulsed laser coupled into a multifiber catheter. Experimental data from our laboratory showed that this solid state laser had the ability to cut calcified tissue, to be preferentially absorbed by atheroma, and to ablate tissue even when the catheter tip was positioned at a distance from the target. These results were obtained with only minimal thermal effects. After assessment of the efficacy and safety of this technique, laser angioplasty was performed in 53 consecutive patients with totally occluded (40%) or stenosed (mean percent 94) coronary arteries with a mean length of 6 mm. The primary laser and the procedure success rate were 64% and 94%, respectively. Failures were due to inability to advance the catheter against the lesion or to cross the obstruction. Stand-alone laser therapy could be achieved in only 18% of patients. In previous dilatation failures, laser irradiation allowed for subsequent balloon angioplasty to be successfully performed at a lower inflation pressure than that used in the failed dilatation. Complications included abrupt (during the procedure) and early (within 24 hours) vessel closure in 19% of cases, dissection without hemodynamic consequence in 28% and spasm. Reoccluded arteries could all be recanalized with dilatation.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

J Interv Cardiol

journal_title

Journal of interventional cardiology

authors

Geschwind HJ,Tomaru T,Nakamura F,Kvasnicka J

doi

10.1111/j.1540-8183.1991.tb00790.x

subject

Has Abstract

pub_date

1991-01-01 00:00:00

pages

171-9

issue

3

eissn

0896-4327

issn

1540-8183

journal_volume

4

pub_type

杂志文章

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