Simple circuit for pacing hearts of experimental animals.
In this paper we describe a simple pacing circuit which can be used to drive the heart over a wide range of rates. The circuit is an astable multivibrator, based on an LM555 integrated circuit. It is powered by a 9-V battery and is small enough for use in rabbits. The circuit is easily constructed and inexpensive, making it attractive for numerous applications in cardiovascular research.
Freeman
G L
GL
University of Texas Health Science Center, San Antonio 78284.
Colston
J T
JT
D000818:Animals; D000830:Animals, Laboratory; D004559:Electric Wiring; D010138:Pacemaker, Artificial