title: [Exercise loading and changes in P waves].
mesh_terms: D000328:Adult; D000368:Aged; D002769:Cholelithiasis / Q000175:diagnosis; D003920:Diabetes Mellitus / Q000175:diagnosis; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis; D006801:Humans; D006973:Hypertension / Q000175:diagnosis; D006980:Hyperthyroidism / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis