title: Towards a closed-loop system for stimulation and recording: an in vitro approach with embryonic cardiomyocytes.
abstract: Closed loop systems, in which stimulation parameters are adjusted according to recorded signals would reduce the occurrence of side effects of stimulation and broaden current therapeutic options. As a step towards a closed-loop clinical system, we developed a single electrode stimulation / recording system for an in vitro microelectrode array. The system was used in vitro to simultaneously stimulate and record cardiac cells. Results indicated that stimulation artifacts depend on the distance between recording electrode and stimulating electrode and on the voltage amplitude. No artifact reduction algorithm was required for detecting cardiac action potentials 2ms after stimulation if the stimulation pulses were less than or equal to ± 1.5 V, and the distance from stimulation site was more than 200 µm. Cardiac signal propagation was also investigated with this system.
authors.affiliation: KULeuven and Imec, Belgium. thikim@imec.be
authors.forename: Thoa
authors.initials: T
authors.lastname: Nguyen
authors.forename: Dries
authors.initials: D
authors.lastname: Braeken
authors.forename: Silke
authors.initials: S
authors.lastname: Musa
authors.forename: Olga
authors.initials: O
authors.lastname: Krylychkina
authors.forename: Carmen
authors.initials: C
authors.lastname: Bartic
authors.forename: Georges
authors.initials: G
authors.lastname: Gielen
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Eberle
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000465:Algorithms; D000818:Animals; D016477:Artifacts; D003198:Computer Simulation; D004558:Electric Stimulation / Q000379:methods; D004594:Electrophysiology / Q000379:methods; D006321:Heart / Q000196:embryology; D066298:In Vitro Techniques; D008839:Microelectrodes; D008955:Models, Cardiovascular; D032383:Myocytes, Cardiac / Q000166:cytology* / Q000378:metabolism*; D051381:Rats; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors