title: Calculation of left ventricle ejection fraction (LVEF) by digital videodensitometric analysis. Preliminary results.
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods*; D000792:Angiography / Q000379:methods; D002302:Cardiac Output; D006801:Humans; D013318:Stroke Volume; D013382:Subtraction Technique; D014741:Video Recording