'Nonrespiratory sinus arrhythmia' or 'heart rate alternans': comments on the article by Gratadour et al. 'Unusual sinus arrhythmia'.
Benchimol-Barbosa
Paulo Roberto
PR
Barbosa-Filho
José
J
D001146:Arrhythmia, Sinus / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans