title: Prevalence of right-to-left atrial shunting in a healthy population: detection by Valsalva maneuver contrast echocardiography.
mesh_terms: D000293:Adolescent; D000328:Adult; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008297:Male; D014636:Valsalva Maneuver