FFR


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FFR

Abbreviation for:
field-free region (see there)

reserve

(re-zerv') [L. reservare, to keep back]
1. Something held back for future use.
2. Self-control of one's feelings and thoughts.

alkali reserve

Alkaline reserve.

alkaline reserve

The amount of base in the blood, principally bicarbonates, available for neutralization of fixed acids (acetoacetate, ß-hydroxybutyrate, and lactate). A fall in alkaline reserve is called acidosis; a rise, alkalosis.
Synonym: alkali reserve

cardiac reserve

The ability of the heart to increase cardiac output to meet the needs of increased energy output.

coronary flow reserve

The ratio of the blood flow in the coronary arteries when they are at rest to their blood flow when they are maximally stimulated or dilated.
See: coronary blood flow

fractional flow reserve

Abbreviation: FFR
The ratio of the blood pressure in the furthest reaches of a coronary artery divided by the blood pressure in the aorta. The ratio is determined when the arteries are maximally vasodilated. The FFR determines the flow-limiting significance of a coronary artery stenosis. When the pressure in the distal portion of a healthy coronary artery is equal to the pressure in the aorta, the FFR is 1.0. Arteries with FFR less than 0.75 have large enough obstructions to cause myocardial ischemia.

ovarian reserve

The number of remaining oocytes or follicles in the ovaries. The number typically falls with increasing age. It also declines as a result of some types of chemotherapy. Women with very limited ovarian reserves may have difficulty conceiving a child without assisted reproductive techniques.

fractional flow reserve

Abbreviation: FFR
The ratio of the blood pressure in the furthest reaches of a coronary artery divided by the blood pressure in the aorta. The ratio is determined when the arteries are maximally vasodilated. The FFR determines the flow-limiting significance of a coronary artery stenosis. When the pressure in the distal portion of a healthy coronary artery is equal to the pressure in the aorta, the FFR is 1.0. Arteries with FFR less than 0.75 have large enough obstructions to cause myocardial ischemia.
See also: reserve

FFR

Abbrev. for Fellow of the Faculty of Radiologists.
References in periodicals archive ?
FFR was calculated as the ratio of the mean distal pressure measured by the pressure wire divided by the mean proximal pressure measured by the guiding catheter.
Because of a previously reported joint effect of relative and absolute FFR exposure on excess body weight, (11) we also assessed effect modification of relative FFR availability by the absolute number of FFR using interaction terms and stratified analyses.
In order to accomplish this objective, it needs to lessen the interference with FFR method.
But even some of FFR's early grants disappointed men like Ferry, who found books like Rossiter's too academic to have impact, a number of early grants and press releases--or even news of the FFR's mere existence--were sufficiently unsettling to some conservatives (a staunch opponent of the FFR being the American Legion) as to draw criticism in the national press (Ward 2001).
Even though it judged inflationary pressures to be temporary, tightening seemed appropriate, as the FFR was at a 45-year low of 1 percent.
The result is an absolute number; an FFR of 1 is considerd to be 'normal', suggesting that there is no restriction of flow across the area of the vessel studied.
Given that researchers (Chan, 1993; Sias and Starks, 1997) have concluded that individual stock autocorrelations are statistically insignificant, finding significant autocorrelations for FFR firms provides stronger evidence that these firms' behavior is unique with respect to market efficiency.
If others who adhere to the ideals of the FFR did take the Canadian diplomat hostage, the FFR cannot assume responsibility," it said.
The Volcano s5i can now accommodate the three primary intravascular diagnostic tools in regular use by cardiologists today (high frequency rotational IVUS, fast and simple phased array IVUS, and pressure-based FFR guidewires) on a single platform, making modern day imaging consoles more flexible than ever before.
If they want to objectively measure lesion severity prior to committing to a therapeutic strategy, they can use a Volcano FFR guidewire.
Eventually, if the FFR increase is large enough, the data show that the income effect dominates and spending also declines on both non-durables and services.
The policy instrument is the money base instead of the FFR.