title: Artifacts, blocks, and arrhythmias: confusing nonclassical heart rate tracings.
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D005318:Fetal Heart / Q000503:physiopathology*; D005323:Fetal Monitoring; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy; D014463:Ultrasonography