title: EKG of the month. When normal isn't "normal". Sinus tachycardia.
mesh_terms: D000328:Adult; D004562:Electrocardiography; D006801:Humans; D008297:Male; D012849:Sinoatrial Node / Q000503:physiopathology; D013610:Tachycardia / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology