EKG of the month. Ectopic atrial rhythm.
D000293:Adolescent; D001145:Arrhythmias, Cardiac; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria / Q000503:physiopathology*; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology*; D006801:Humans; D014683:Vena Cava, Superior / Q000002:abnormalities*