[Clinical significance of sinus arrhythmia (and on the problem of the influence of deep respiration on the activity of the heart)].
D001146:Arrhythmia, Sinus; D001145:Arrhythmias, Cardiac / Q000502:physiology*; D004562:Electrocardiography; D006321:Heart; D006801:Humans; D012119:Respiration / Q000502:physiology*
ARRHYTHMIA/physiology; ELECTROCARDIOGRAPHY; RESPIRATION/physiology