ejection fraction


Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia.

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 ?
A case of thrombus formation in a patient with preserved left ventricle ejection fraction and development of peripheral embolization.
Heart failure with preserved EF (HFpEF) is clinical syndrome comprising of symptoms of heart failure but left ventricle ejection fraction is not decreased.
This study shows a strong negative correlation between serum troponin T concentration measured 12-48 hours postmyocardial infarction and echocardiographic left ventricular ejection fraction (r =- 0.
However, the discharge Motricity index and the motor and total FIM score of both groups were significantly different; the low ejection fraction group had a lower discharge Motricity index and lower motor and total FIM scores than did the high ejection fraction group.
Clinical research by cardiologist Peter Langsjoen in 2008 found that ejection fraction could be boosted from 24% to 45% (the higher the percentage, the better) using 450 mg/day of the ubiquinol form of CoQ10 on congestive heart failure patients.
hospitals with a diagnosis of HF with decreased left ventricular ejection fraction in 20052009 and were eligible for treatment with aldosterone antagonists.
This excess mortality risk associated with male gender was of similar magnitude in patients with either reduced or preserved ejection fraction, which was not affected by either age or history of hypertension.
5) found that the calculation of the gallbladder ejection fraction (GBEF) was useful in selecting patients for surgery in 19 of 23 papers studied, including that of Yap et al.
Effect of propranolol versus no propranolol on total mortality plus nonfatal myocardial infarction in older patients with prior myocardial infarction, congestive heart failure, and left ventricular ejection fraction [greater than or equal to] 40% treated with diuretics plus angiotensin-converting enzyme inhibitors.
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.
Methods: The study groups consisted of 35 normals, 26 with LV dysfunction, and 60 with aortic regurgitation (AR): 40 with ejection fraction (EF) >50% (AR+Normal EF) and 20 with ejection fraction [greater than or equal to]50% (AR+Reduced EF).
The guideline stipulates that ICDs should be used as a primary prevention therapy for heart failure patients with a low ejection fraction (poor heart pumping function) to save lives from sudden cardiac arrest (SCA), and as a secondary prevention therapy for heart failure patients with a low ejection fraction and a previous SCA or documented, sustained ventricular arrhythmias.