title: EKG of the month: electrical alternans of QRS and T wave and sinus tachycardia.
mesh_terms: D004562:Electrocardiography; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011013:Pneumonectomy; D011183:Postoperative Complications / Q000175:diagnosis; D013610:Tachycardia / Q000175:diagnosis*