The Frank vectorcardiogram of the normal 4 month old infant.
D000367:Age Factors; D016275:Atrial Function; D004594:Electrophysiology; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D007223:Infant; D014672:Vectorcardiography / Q000295:instrumentation; D016276:Ventricular Function