title: [Tachometer (for determination of the heart rate)].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006334:Heart Function Tests / Q000295:instrumentation; D006339:Heart Rate; D006801:Humans; D007223:Infant; D008875:Middle Aged