Simple optical methods for the recognition of atrial flutter, especially at slow atrial rates.
D001281:Atrial Fibrillation / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D013902:Radiography, Thoracic; D013610:Tachycardia / Q000175:diagnosis*