RT Book, Section A1 Fernandez, Antonio B. A1 Saucier, Stephanie A2 Crawford, Michael H. SR Print(0) ID 1198116338 T1 The Athlete & the Heart T2 Current Diagnosis & Treatment: Cardiology, 6e YR 2023 FD 2023 PB McGraw Hill Education PP New York, NY SN 9781264643578 LK accessmedicine.mhmedical.com/content.aspx?aid=1198116338 RD 2024/04/19 AB ESSENTIALS OF DIAGNOSISThe patient has an extensive history of exercise training.There may be profound sinus bradycardia, sinus arrhythmias, or atrioventricular conduction delays at rest that disappear with exertion.The athlete’s heart may demonstrate four-chamber enlargement and mild left ventricular hypertrophy, but normal diastolic function and B-natriuretic peptide levels. The diastolic wall-to-volume ratio should be < 0.15 mm/m2/mL by magnetic resonance imaging.Most morphologic changes reverse with detraining.