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ejection fraction |
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fraction /frac·tion/ (frak´shun) 1. a portion of something larger. 2. in chemistry, one of the separable constituents of a substance.frac´tional ejection fraction the proportion of the volume of blood in the ventricles at the end of diastole that is ejected during systole; it is the stroke volume divided by the end-diastolic volume, often expressed as a percentage. It is normally 65 ± 8 per cent; lower values indicate ventricular dysfunction. plasma protein fraction a preparation of serum albumin and globulin obtained by fractionating source blood, plasma, or serum from healthy human donors; used as a blood volume supporter.
Ejection fraction The fraction of all blood in the ventricle that is ejected at each heartbeat. One of the main advantages of the MUGA scan is its ability to measure ejection fraction, one of the most important measures of the heart's performance. Mentioned in: Heart Failure, Multiple-Gated Acquisition (MUGA) Scan ejection fraction (EF), the fraction of the total ventricular filling volume that is ejected during each ventricular contraction. The normal EF of the left ventricle is 65%. ejection fraction in echocardiography, the fractional volume of blood leaving the left ventricle in systole. ejection fraction Left ventricular ejection fraction Cardiology The percentage of blood present in the left ventricle that is effectively pumped forward during systole to supply the peripheral circulation. See Congestive heart failure. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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If such trials prove that T-wave alternans and other new measures can supplement ejection fraction in clinical evaluation of patients, doctors may save more lives even though they implant fewer devices than they do now. As further evidence, DeBakey said that a measure of heart function known as the ejection fraction rose to 40 percent just before surgery from 20 percent in September. Common Risk Factors for Unexpected Postoperative Complications in Seniors * LV ejection fraction less than 35 percent * MI in prior 6 months * Poor genral physical condition * History of CHF * Ventricular wall motion abnormalities * FVC less than 50 percent of predicted * pCO2 over 45 * Smoker * Pre-existing pulmonary disease * Weight more than 150 percent above normal Source: Nolan, T. |
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