title: Physiological cardiac pacing: the DDD pacemaker system and rate-responsive modes.
authors.forename: M J
authors.initials: MJ
authors.lastname: Stafford
authors.forename: K M
authors.initials: KM
authors.lastname: Kleinschmidt
mesh_terms: D005246:Feedback; D006339:Heart Rate; D006801:Humans; D009732:Nursing Care / Q000379:methods; D010138:Pacemaker, Artificial / Q000592:standards* / Q000639:trends; D013813:Therapy, Computer-Assisted / Q000592:standards*