phonocatheter

[ fō′nō-kăthĭ-tər ]

n.

A cardiac catheter with a miniature microphone in its tip used in recording sounds and murmurs from within the heart and large blood vessels.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.