Echocardiographic estimation of left atrial size from the apical view.
D000293:Adolescent; D000328:Adult; D000368:Aged; D009202:Cardiomyopathies / Q000175:diagnosis; D004452:Echocardiography / Q000379:methods*; D006325:Heart Atria / Q000473:pathology*; D006331:Heart Diseases / Q000175:diagnosis*; D006349:Heart Valve Diseases / Q000175:diagnosis; D006801:Humans; D008875:Middle Aged