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In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres. At this distance, the symbols on the line representing "normal" acuity subtend an angle of five minutes of arc, and the thickness of the lines and of the spaces between the lines subtends one minute of arc. This line, designated 6/6 (or 20/20), is the ...
Mitral regurgitation, also known as mitral insufficiency or mitral incompetence, is the backward flow of blood from the left ventricle, through the mitral valve, and into the left atrium, when the left ventricle contracts, resulting in a systolic murmur radiating to the left armpit. [ 5][ 3]
List of medical abbreviations: 0–9. Dx - Diagnosis, Sx - Symptoms, Fx - Fracture, Tx - Treatment, Hx - History S/b-seen by.
[4] [6] [7] At 2 degrees eccentricity, for example, acuity is half the foveal value. Visual acuity is a measure of how well small details are resolved in the very center of the visual field; it therefore does not indicate how larger patterns are recognized. Visual acuity alone thus cannot determine the overall quality of visual function. [8]
Ejection fraction. An ejection fraction ( EF) is the volumetric fraction (or portion of the total) of fluid (usually blood) ejected from a chamber (usually the heart) with each contraction (or heartbeat ). It can refer to the cardiac atrium, [ 1] ventricle, [ 2] gall bladder, [ 3] or leg veins, [ 4] although if unspecified it usually refers to ...
Aortic regurgitation. Aortic regurgitation ( AR ), also known as aortic insufficiency ( AI ), is the leaking of the aortic valve of the heart that causes blood to flow in the reverse direction during ventricular diastole, from the aorta into the left ventricle. As a consequence, the cardiac muscle is forced to work harder than normal.
In cardiac physiology, cardiac output ( CO ), also known as heart output and often denoted by the symbols , , or , [ 2] is the volumetric flow rate of the heart 's pumping output: that is, the volume of blood being pumped by a single ventricle of the heart, per unit time (usually measured per minute). Cardiac output (CO) is the product of the ...
Glossary of Medical Terms - Tufts University. Medical Abbreviations EN English Medical Abbreviations for Android. JD.MD, Inc. online Medical & Dental Abbreviations Glossary. Acronyms for Medical & Dental professional organizations. Medical Abbreviations for iPhone. Medical abbreviations on mediLexicon.