[Influence of the rate on the contraction phases of the heart].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006321:Heart / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008875:Middle Aged
Influencia de la frecuencia sobre las fases de contracción del corazón.