title: Method of investigation of deviations from the normal duration of the cardiac cycle.
abstract: An electronic systems for determining the frequency of deviations from the normal duration of the cardiac cycle is described.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology; D004582:Electronics, Medical; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D005222:Mental Fatigue / Q000503:physiopathology*