title: Atrial tachycardia with exit block around the ectopic pacemaker in an otherwise healthy infant.
mesh_terms: D004562:Electrocardiography; D006325:Heart Atria; D006327:Heart Block / Q000209:etiology*; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000209:etiology* / Q000503:physiopathology; D008297:Male; D012849:Sinoatrial Node / Q000002:abnormalities*; D013614:Tachycardia, Paroxysmal / Q000209:etiology* / Q000503:physiopathology; D014630:Vagus Nerve / Q000502:physiology