Optical mapping of tachycardia-like excitation evoked by pacing in the isolated rat atrium.
Multiple-site optical recording of membrane potential activity using a voltage-sensitive dye was employed to monitor action potentials in the rat atrium. Electrical pacing at 1 Hz evoked the events of tachycardia-like excitation (TE). Optical mapping revealed that a coupling of spontaneous and evoked action potentials resulted in the initiation of TE.
Sakai
Tetsuro
T
Department of Physiology, Tokyo Medical and Dental University Graduate School and Faculty of Medicine, Tokyo 113-8519, Japan. tsakai@med.u-ryukyu.ac.jp
D000818:Animals; D016275:Atrial Function / Q000502:physiology*; D002304:Cardiac Pacing, Artificial; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006325:Heart Atria; D066298:In Vitro Techniques; D008297:Male; D055095:Optics and Photonics; D051381:Rats; D017208:Rats, Wistar; D013610:Tachycardia / Q000503:physiopathology*