EF

(redirected from EFS)
Also found in: Dictionary, Acronyms, Encyclopedia, Wikipedia.

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%.

EF

Abbreviation for ejection fraction.

fraction

(frak'shon) [L. fractio, act of breaking]
1. In biological chemistry, the separable part of a substance such as blood or plasma.
2. The ratio of a component to the total, e.g., the substance fraction of carboxyhemoglobin (relative to the total hemoglobin).

attributable fraction

The percentage of instances of an illness that can be accounted for by a particular risk factor. For example, people exposed to asbestos have a certain risk of developing lung cancer, and if they also smoke tobacco, they are also at risk from that factor. These risks may be estimated from cohort studies.
Synonym: additional risk; attributable risk

carboxyhemoglobin fraction

The percentage of total hemoglobin in a blood sample that is covalently bonded to carbon monoxide.

ejection fraction

Abbreviation: EF
In cardiac physiology, the percentage of the blood emptied from the ventricle during systole. The left ventricular ejection fraction averages 60% to 70% in healthy hearts but can be markedly reduced if part of the heart muscle dies (as after myocardial infarction) or in cardiomyopathy or valvular heart disease.

immature platelet fraction

Abbreviation: IPF
The percent of platelets found in the circulating blood that still retains RNA. It is elevated (greater than 12%) in diseases in which platelets are rapidly destroyed after their release from the bone marrow, e.g., disseminated intravascular coagulation (DIC), idiopathic thrombocytopenic purpura (ITP), and thrombotic thrombocytopenic purpura (TTP). These diseases can be distinguished from other thrombocytopenic conditions in which platelet regeneration is slower, e.g., aplastic anemia, liver failure, or kidney failure, because the IPF is usually less than 12% in diseases characterized by bone marrow inactivity or suppression. The IPF is determined using flow cytometry.

fraction of inspired oxygen

Abbreviation: Fio2
The concentration of oxygen in the inspired air, esp. that supplied as supplemental oxygen by mask or catheter.

mass fraction

The ratio of the mass of a constituent to the total mass of the system in which the constituent is contained.

methemoglobin fraction

The fraction of the hemoglobin in the blood in which ferrous iron has been oxidized to ferric iron.

oxyhemoglobin fraction

F O2Hb
That portion of hemoglobin present in a sample of blood that is reversibly bound to oxygen.

plasma protein fraction

A standard sterile preparation of serum albumin and globulin obtained by fractionating blood, serum, or plasma from healthy human donors and testing for absence of hepatitis B surface antigen. It is used as a blood volume expander.

substance fraction

The ratio of the amount (number of moles or entities) of a constituent of a mixture to the total of constituents of the system.
See: mass fraction

volume fraction

The ratio of the volume of a constituent to the volume of the whole. In practice, it may be difficult to determine the volume fraction because differences in the molecular sizes of the constituents may produce a total volume that differs from the sum of the individual volumes of the mixture. When materials of similar physicochemical characteristics (such as multiple aqueous solutions) are combined, this is not a problem.

ejection fraction

Abbreviation: EF
In cardiac physiology, the percentage of the blood emptied from the ventricle during systole. The left ventricular ejection fraction averages 60% to 70% in healthy hearts but can be markedly reduced if part of the heart muscle dies (as after myocardial infarction) or in cardiomyopathy or valvular heart disease.
See also: fraction

EF

elongation factor.
References in periodicals archive ?
EFS CarrierControl also provides robust card management functionality including access to real-time credit balances and limits along with the ability to change the card status to active/inactive/on-hold in real time.
Chauhan, added: "At EFS, we are excited about the growth opportunities for managed security services here in the UAE where demand for quality security services is high and rising.
If you think a Limited Company with VAT already registered may be the solution to your situation, or you wish to have a competent company do the registration process for you take a look at what EFS has to offer to you at www.
By following the above method, you can back up and restore the EFS data on your new Samsung Galaxy Note 2.
Early indications using the corrected data for EFS #3 are that the ultimate recovery from the well will be higher than from our first Eagle Ford well, which in turn is producing better than the 425,000 boe curve reported in the Company's release of 24 August 2011.
This step identifies the person(s) with overall responsibility for the project, the aims of the project, the physical boundaries of the EFS risk to be managed, budgets, time scales, and the personnel with their responsibilities and authorities.
The 14 EFS has created a disciplined and tactical culture of proactive vigilance with safety at the forefront of combat operations.
where EFS has been awarded a five year (with four option years) contract to provide facilities management services for The World Bank's 3.
We pride ourselves at Coventry on providing a learning path for people towards a successful future and EFS can take them an extra giant leap forward.
EFS -a highly innovative new business programme from the University of Central England (UCE) in Birmingham -is turning design and technologybased ideas into business opportunities at record levels following an unprecedented intake of applications and assessments.
Moscow has released Advanced EFS Data Recovery (AEFSDR) 1.
Lockheed Martin officials visited EFS as part of the Marietta, Ga.