title: Simple circuit for pacing hearts of experimental animals.
abstract: 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.
authors.affiliation: University of Texas Health Science Center, San Antonio 78284.
authors.forename: G L
authors.initials: GL
authors.lastname: Freeman
authors.forename: J T
authors.initials: JT
authors.lastname: Colston
mesh_terms: D000818:Animals; D000830:Animals, Laboratory; D004559:Electric Wiring; D010138:Pacemaker, Artificial