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The left anterior descending artery (also LAD, anterior interventricular branch of left coronary artery, or anterior descending branch) is a branch of the left coronary artery. It supplies the anterior portion of the left ventricle. [1] It provides about half of the arterial supply to the left ventricle and is thus considered the most important ...
Blood is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), [ 2] and contains proteins, glucose, mineral ions, and hormones. The blood cells are mainly red blood cells (erythrocytes), white blood cells (leukocytes), and (in mammals) platelets (thrombocytes). [ 3]
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 ...
The circumflex artery supplies the posterolateral left ventricle and the anterolateral papillary muscle. It also supplies the sinoatrial nodal artery in 38% of people. It supplies 15–25% of the left ventricle in right-dominant systems. If the coronary anatomy is left-dominant, the circumflex artery supplies 40–50% of the left ventricle.
Bias against people who are left-handed includes handwriting, which is one of the biggest sources of disadvantage for left-handed people, other than for those forced to work with certain machinery. About 90 percent of the world's population is right-handed, [ 1] and many common articles are designed for efficient use by right-handed people, and ...
In the United States, individuals and corporations pay a tax on the net total of all their capital gains. The tax rate depends on both the investor's tax bracket and the amount of time the investment was held. Short-term capital gains are taxed at the investor's ordinary income tax rate and are defined as investments held for a year or less ...
Show comments. Coco Gauff, Novak Djokovic and other players at the U.S. Open will be playing for a record total of $75 million in compensation at the year's last Grand Slam tennis tournament, a ...
A right-to-left shunt occurs when: there is an opening or passage between the atria, ventricles, and/or great vessels; and, right heart pressure is higher than left heart pressure and/or the shunt has a one-way valvular opening. Small physiological, or "normal", shunts are seen due to the return of bronchial artery blood and coronary blood ...