title: Analogue preprocessor for the measurement by a digital computer of R-R intervals and R wave widths.
mesh_terms: D000703:Analog-Digital Conversion; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D003201:Computers; D004562:Electrocardiography; D006801:Humans; D008991:Monitoring, Physiologic