Sex-related differences in left ventricular structure in early adolescent non-professional athletes

BackgroundProfessional athletes exhibit lower left ventricular wall thicknesses, diameters and mass (in females), with less frequent training-related electrocardiogram (ECG) changes, as compared with controls.MethodsWe studied the association of sex with left ventricular structure in trained early adolescents. Two hundred and six adolescent Caucasian athletes (mean age 13.8 ± 1.6, range 11.8–16.9 years, 158 males and 48 females), with similar degree of training underwent ECG and echocardiographic measurements of left ventricular diameters, thicknesses and mass, with relative wall thickness as the remodelling index.ResultsAs compared with females, males exhibited greater maximal wall thickness (males = 8.7 ± 1.2 vs. females = 7.9 ± 0.8) and indexed left ventricular mass (100 ± 18 g/m2vs. 79 ± 12, p < 0.001), without differences in relative wall thickness (males = 0.35 ± 0.04 vs. females = 0.34 ± 0.04) and with higher prevalence of ECG-based left ventricular hypertrophy, sinus bradycardia and ST-elevation. ...