noun, plural angioplasties. Surgery.
the repair of a blood vessel, as by inserting a balloon-tipped catheter to unclog it or by replacing part of the vessel with either a piece of the patient's own tissue or a prosthetic device: coronary angioplasty to widen an artery blocked by plaque.

angio- + -plasty Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
angioplasty (ˈændʒɪəˌplæstɪ)
a surgical technique for restoring normal blood flow through an artery narrowed or blocked by atherosclerosis, either by inserting a balloon into the narrowed section and inflating it or by using a laser beam

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American Heritage
Medical Dictionary

angioplasty an·gi·o·plas·ty (ān'jē-ə-plās'tē)

  1. Surgical reconstruction of a blood vessel.

  2. Balloon angioplasty.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
angioplasty   (ān'jē-ə-plās'tē)  Pronunciation Key 

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The surgical repair of a blood vessel, such as an obstructed coronary artery, usually by inflating a small balloon at the end of a catheter.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
angioplasty [(an-jee-uh-plas-tee)]

A surgical technique in which a catheter containing a small balloon is inserted into arteries around the heart. The balloon is inflated to compress deposits of fatty substances blocking the artery, thereby restoring the flow of blood.

Note: Also called balloon therapy.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
The other is a procedure called carotid angioplasty with stent placement.
Angioplasty can help reduce the frequency of angina attacks.
Angioplasty is a procedure to open narrowed or blocked blood vessels that
  supply blood to the heart.
Additional therapy, such as cardiac catheterization or angioplasty, may be
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