title: [Reliability of cardiac output measurement during supine exercise using an earpiece densitometer].
mesh_terms: D000328:Adult; D000368:Aged; D002302:Cardiac Output; D004395:Dye Dilution Technique; D005080:Exercise Test; D005260:Female; D006331:Heart Diseases / Q000503:physiopathology; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged