cardiac catheter

n.
  1. A long, fine catheter that can be passed into the chambers of the heart via a vein or artery as a means of withdrawing samples of blood, measuring pressures within the heart's chambers or great vessels, or injecting contrast media.intracardiac catheter
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.