ejection fraction


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e·jec·tion frac·tion

the fraction of the blood contained in the ventricle at the end of diastole that is expelled during its contraction, that is, the stroke volume divided by end-diastolic volume, normally 0.55 (by electrocardiogram) or greater; with the onset of congestive heart failure, the ejection fraction decreases, sometimes to 0.10 or even less in severe cases.

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

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.

e·jec·tion frac·tion

(EF) (ē-jek'shŭn frak'shŭn)
The fraction of blood contained in the ventricle at the end of diastole that is expelled during its contraction.

ejection fraction

The ratio of the stroke volume to the end diastolic volume in the ventricles of the heart. In the healthy heart the volume of blood in the left ventricle at the end of diastole is approximately 140 ml and the stroke volume is about 90 ml. The ejection fraction (stroke volume/end-diastolic volume) is between 50 and 70 per cent. The ejection fraction of the right ventricle is similar. Ejection fraction is not a good predictor of clinical disability. See also DIASTOLIC HEART FAILURE.

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.

ejection fraction

in echocardiography, the fractional volume of blood leaving the left ventricle in systole.
References in periodicals archive ?
In the present study, admission motor scores, total FIM scores, Berg Balance scores and the Motricity index were lower in stroke patients with low ejection fraction compared with those in high ejection fraction patients, but the differences were statistically insignificant.
Does gallbladder ejection fraction predict outcome after cholecystectomy for suspected chronic acalculous gallbladder dysfunction?
An insult such as a myocardial infarction--commonly called a heart attack--causes muscle damage that can instantly trigger fatal arrhythmia, or it can permanently reduce ejection fraction.
Umpierrez et al (8) published a study of a series of seven patients with hyperthyroidism and congestive heart failure in which the mean left ventricular systolic ejection fraction increased from 28 to 55% after treatment of thyrotoxicosis.
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.
A negative MTWA test result identified a population of patients at very low risk of SCA during the following 24 months, regardless of ejection fraction (EF) (annual event rate 0.
Novartis announced today that Swissmedic has approved Entresto(TM) (sacubitril/valsartan), previously known as LCZ696, to reduce the risk of cardiovascular mortality and morbidity in patients with heart failure with reduced ejection fraction (HFrEF).
The hearts of animals that received GMT alone also worked better as defined by ejection fraction than those who had not received genes.
If clinicians consider the totality of the evidence from these two observational studies and the randomized clinical trials that they appear to contradict, we can arrive at two sound conclusions: First, it is reasonable to use RAS antagonists to control hypertension in HF with preserved ejection fraction; second, aldosterone antagonists are effective but should be used carefully and selectively in patients who have HF with reduced ejection fraction, said Dr.
Changes in left ventricular ejection fraction (LVEF), flow-mediated vasodilation, plasma high-sensitive interleukin 6 and high-sensitive tumor necrosis factor, and exercise peak oxygen consumption were assessed.
Q: I had a heart attack at age 41, and an angiogram revealed an ejection fraction of 35 percent.