title: Are ejection fractions based on regression equations for systolic time ratios reliable?
authors.affiliation: Department of Internal Medicine, Naval Hospital, San Diego, CA 92134-5000.
authors.forename: L S
authors.initials: LS
authors.lastname: Bowling
authors.forename: D E
authors.initials: DE
authors.lastname: Amundson
mesh_terms: D015982:Bias; D002307:Cardiography, Impedance / Q000592:standards; D016001:Confidence Intervals; D004562:Electrocardiography / Q000592:standards; D005069:Evaluation Studies as Topic; D006801:Humans; D015635:Radionuclide Ventriculography / Q000592:standards; D012044:Regression Analysis; D015203:Reproducibility of Results; D013318:Stroke Volume; D013599:Systole; D013997:Time Factors